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[PATCH 3/4] LoongArch: Add stacktrace support

Qing Zhang posted 4 patches 3 years, 8 months ago
[PATCH 3/4] LoongArch: Add stacktrace support
Posted by Qing Zhang 3 years, 8 months ago 
Use common arch_stack_walk infrastructure to avoid duplicated code and
avoid taking care of the stack storage and filtering.
Add sra (means __schedule return address) and scfa (means __schedule call
frame address) to thread_info and store it in switch_to().

Now we can print the process stack by cat /proc/*/stack and can better
support ftrace.

Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
---
 arch/loongarch/Kconfig                 |  5 ++++
 arch/loongarch/include/asm/processor.h |  9 +++++++
 arch/loongarch/include/asm/switch_to.h | 14 ++++++----
 arch/loongarch/include/asm/uaccess.h   |  4 +--
 arch/loongarch/kernel/Makefile         |  1 +
 arch/loongarch/kernel/asm-offsets.c    |  2 ++
 arch/loongarch/kernel/process.c        |  3 +++
 arch/loongarch/kernel/stacktrace.c     | 37 ++++++++++++++++++++++++++
 arch/loongarch/kernel/switch.S         |  2 ++
 9 files changed, 70 insertions(+), 7 deletions(-)
 create mode 100644 arch/loongarch/kernel/stacktrace.c

diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index 62b5b07fa4e1..85d0fa3147cd 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -38,6 +38,7 @@ config LOONGARCH
 	select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION
 	select ARCH_MIGHT_HAVE_PC_PARPORT
 	select ARCH_MIGHT_HAVE_PC_SERIO
+	select ARCH_STACKWALK
 	select ARCH_SPARSEMEM_ENABLE
 	select ARCH_SUPPORTS_ACPI
 	select ARCH_SUPPORTS_ATOMIC_RMW
@@ -140,6 +141,10 @@ config LOCKDEP_SUPPORT
 	bool
 	default y
 
+config STACKTRACE_SUPPORT
+	bool
+	default y
+
 # MACH_LOONGSON32 and MACH_LOONGSON64 are delibrately carried over from the
 # MIPS Loongson code, to preserve Loongson-specific code paths in drivers that
 # are shared between architectures, and specifically expecting the symbols.
diff --git a/arch/loongarch/include/asm/processor.h b/arch/loongarch/include/asm/processor.h
index 57ec45aa078e..1c4b4308378d 100644
--- a/arch/loongarch/include/asm/processor.h
+++ b/arch/loongarch/include/asm/processor.h
@@ -101,6 +101,10 @@ struct thread_struct {
 	unsigned long reg23, reg24, reg25, reg26; /* s0-s3 */
 	unsigned long reg27, reg28, reg29, reg30, reg31; /* s4-s8 */
 
+	/* __schedule() return address / call frame address */
+	unsigned long sched_ra;
+	unsigned long sched_cfa;
+
 	/* CSR registers */
 	unsigned long csr_prmd;
 	unsigned long csr_crmd;
@@ -129,6 +133,9 @@ struct thread_struct {
 	struct loongarch_fpu fpu FPU_ALIGN;
 };
 
+#define thread_saved_ra(tsk)	(tsk->thread.sched_ra)
+#define thread_saved_fp(tsk)	(tsk->thread.sched_cfa)
+
 #define INIT_THREAD  {						\
 	/*							\
 	 * Main processor registers				\
@@ -145,6 +152,8 @@ struct thread_struct {
 	.reg29			= 0,				\
 	.reg30			= 0,				\
 	.reg31			= 0,				\
+	.sched_ra		= 0,				\
+	.sched_cfa		= 0,				\
 	.csr_crmd		= 0,				\
 	.csr_prmd		= 0,				\
 	.csr_euen		= 0,				\
diff --git a/arch/loongarch/include/asm/switch_to.h b/arch/loongarch/include/asm/switch_to.h
index 2a8d04375574..43a5ab162d38 100644
--- a/arch/loongarch/include/asm/switch_to.h
+++ b/arch/loongarch/include/asm/switch_to.h
@@ -15,12 +15,15 @@ struct task_struct;
  * @prev:	The task previously executed.
  * @next:	The task to begin executing.
  * @next_ti:	task_thread_info(next).
+ * @sched_ra:	__schedule return address.
+ * @sched_cfa:	__schedule call frame address.
  *
  * This function is used whilst scheduling to save the context of prev & load
  * the context of next. Returns prev.
  */
 extern asmlinkage struct task_struct *__switch_to(struct task_struct *prev,
-			struct task_struct *next, struct thread_info *next_ti);
+			struct task_struct *next, struct thread_info *next_ti,
+			void *sched_ra, void *sched_cfa);
 
 /*
  * For newly created kernel threads switch_to() will return to
@@ -28,10 +31,11 @@ extern asmlinkage struct task_struct *__switch_to(struct task_struct *prev,
  * That is, everything following __switch_to() will be skipped for new threads.
  * So everything that matters to new threads should be placed before __switch_to().
  */
-#define switch_to(prev, next, last)					\
-do {									\
-	lose_fpu_inatomic(1, prev);					\
-	(last) = __switch_to(prev, next, task_thread_info(next));	\
+#define switch_to(prev, next, last)						\
+do {										\
+	lose_fpu_inatomic(1, prev);						\
+	(last) = __switch_to(prev, next, task_thread_info(next),		\
+		 __builtin_return_address(0), __builtin_frame_address(0));	\
 } while (0)
 
 #endif /* _ASM_SWITCH_TO_H */
diff --git a/arch/loongarch/include/asm/uaccess.h b/arch/loongarch/include/asm/uaccess.h
index 2b44edc604a2..a8ae2af4025a 100644
--- a/arch/loongarch/include/asm/uaccess.h
+++ b/arch/loongarch/include/asm/uaccess.h
@@ -229,13 +229,13 @@ extern unsigned long __copy_user(void *to, const void *from, __kernel_size_t n);
 static inline unsigned long __must_check
 raw_copy_from_user(void *to, const void __user *from, unsigned long n)
 {
-	return __copy_user(to, from, n);
+	return __copy_user(to, (__force const void *)from, n);
 }
 
 static inline unsigned long __must_check
 raw_copy_to_user(void __user *to, const void *from, unsigned long n)
 {
-	return __copy_user(to, from, n);
+	return __copy_user((__force void *)to, from, n);
 }
 
 #define INLINE_COPY_FROM_USER
diff --git a/arch/loongarch/kernel/Makefile b/arch/loongarch/kernel/Makefile
index 918600e7b30f..7449513eb08d 100644
--- a/arch/loongarch/kernel/Makefile
+++ b/arch/loongarch/kernel/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_EFI) 		+= efi.o
 obj-$(CONFIG_CPU_HAS_FPU)	+= fpu.o
 
 obj-$(CONFIG_MODULES)		+= module.o module-sections.o
+obj-$(CONFIG_STACKTRACE)        += stacktrace.o
 
 obj-$(CONFIG_PROC_FS)		+= proc.o
 
diff --git a/arch/loongarch/kernel/asm-offsets.c b/arch/loongarch/kernel/asm-offsets.c
index 20cd9e16a95a..eb350f3ffae5 100644
--- a/arch/loongarch/kernel/asm-offsets.c
+++ b/arch/loongarch/kernel/asm-offsets.c
@@ -103,6 +103,8 @@ void output_thread_defines(void)
 	OFFSET(THREAD_REG29, task_struct, thread.reg29);
 	OFFSET(THREAD_REG30, task_struct, thread.reg30);
 	OFFSET(THREAD_REG31, task_struct, thread.reg31);
+	OFFSET(THREAD_SCHED_RA, task_struct, thread.sched_ra);
+	OFFSET(THREAD_SCHED_CFA, task_struct, thread.sched_cfa);
 	OFFSET(THREAD_CSRCRMD, task_struct,
 	       thread.csr_crmd);
 	OFFSET(THREAD_CSRPRMD, task_struct,
diff --git a/arch/loongarch/kernel/process.c b/arch/loongarch/kernel/process.c
index 709b7a1664f8..34c3f2148714 100644
--- a/arch/loongarch/kernel/process.c
+++ b/arch/loongarch/kernel/process.c
@@ -135,6 +135,7 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
 	childregs = (struct pt_regs *) childksp - 1;
 	/*  Put the stack after the struct pt_regs.  */
 	childksp = (unsigned long) childregs;
+	p->thread.sched_cfa = 0;
 	p->thread.csr_euen = 0;
 	p->thread.csr_crmd = csr_read32(LOONGARCH_CSR_CRMD);
 	p->thread.csr_prmd = csr_read32(LOONGARCH_CSR_PRMD);
@@ -145,6 +146,7 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
 		p->thread.reg23 = (unsigned long)args->fn;
 		p->thread.reg24 = (unsigned long)args->fn_arg;
 		p->thread.reg01 = (unsigned long)ret_from_kernel_thread;
+		p->thread.sched_ra = (unsigned long)ret_from_kernel_thread;
 		memset(childregs, 0, sizeof(struct pt_regs));
 		childregs->csr_euen = p->thread.csr_euen;
 		childregs->csr_crmd = p->thread.csr_crmd;
@@ -161,6 +163,7 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
 
 	p->thread.reg03 = (unsigned long) childregs;
 	p->thread.reg01 = (unsigned long) ret_from_fork;
+	p->thread.sched_ra = (unsigned long) ret_from_fork;
 
 	/*
 	 * New tasks lose permission to use the fpu. This accelerates context
diff --git a/arch/loongarch/kernel/stacktrace.c b/arch/loongarch/kernel/stacktrace.c
new file mode 100644
index 000000000000..f4f4b8ad3917
--- /dev/null
+++ b/arch/loongarch/kernel/stacktrace.c
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Stack trace management functions
+ *
+ * Copyright (C) 2022 Loongson Technology Corporation Limited
+ */
+#include <linux/sched.h>
+#include <linux/stacktrace.h>
+
+#include <asm/stacktrace.h>
+#include <asm/unwind.h>
+
+void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie,
+		     struct task_struct *task, struct pt_regs *regs)
+{
+	struct pt_regs dummyregs;
+	struct unwind_state state;
+	unsigned long addr;
+
+	regs = &dummyregs;
+
+	if (task == current) {
+		regs->csr_era = (unsigned long)__builtin_return_address(0);
+		regs->regs[3] = (unsigned long)__builtin_frame_address(0);
+	} else {
+		regs->csr_era = thread_saved_ra(task);
+		regs->regs[3] = thread_saved_fp(task);
+	}
+
+	regs->regs[1] = 0;
+	for (unwind_start(&state, task, regs);
+	      !unwind_done(&state); unwind_next_frame(&state)) {
+		addr = unwind_get_return_address(&state);
+		if (!addr || !consume_entry(cookie, addr))
+			break;
+	}
+}
diff --git a/arch/loongarch/kernel/switch.S b/arch/loongarch/kernel/switch.S
index 37e84ac8ffc2..43ebbc3990f7 100644
--- a/arch/loongarch/kernel/switch.S
+++ b/arch/loongarch/kernel/switch.S
@@ -21,6 +21,8 @@ SYM_FUNC_START(__switch_to)
 
 	cpu_save_nonscratch a0
 	stptr.d	ra, a0, THREAD_REG01
+	stptr.d a3, a0, THREAD_SCHED_RA
+	stptr.d a4, a0, THREAD_SCHED_CFA
 	move	tp, a2
 	cpu_restore_nonscratch a1
 
-- 
2.20.1
Re: [PATCH 3/4] LoongArch: Add stacktrace support
Posted by kernel test robot 3 years, 8 months ago 
Hi Qing,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.19]
[cannot apply to next-20220812]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Qing-Zhang/LoongArch-Add-unwinder-support/20220801-204020
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3d7cb6b04c3f3115719235cc6866b10326de34cd
config: loongarch-randconfig-s033-20220814 (https://download.01.org/0day-ci/archive/20220814/202208141339.jCYoEcIL-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/intel-lab-lkp/linux/commit/102a43b57dafc9c0058a458a62d4133eb8020cbc
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Qing-Zhang/LoongArch-Add-unwinder-support/20220801-204020
        git checkout 102a43b57dafc9c0058a458a62d4133eb8020cbc
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=loongarch SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

sparse warnings: (new ones prefixed by >>)
>> kernel/smp.c:571:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/smp.c:571:9: sparse:     expected void *ptr
   kernel/smp.c:571:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/smp.c:571:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/smp.c:571:9: sparse:     expected void *ptr
   kernel/smp.c:571:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/smp.c:571:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/smp.c:571:9: sparse:     expected void *ptr
   kernel/smp.c:571:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/smp.c:571:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/smp.c:571:9: sparse:     expected void *ptr
   kernel/smp.c:571:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/smp.c:571:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/smp.c:571:9: sparse:     expected void *ptr
   kernel/smp.c:571:9: sparse:     got int [noderef] __percpu *
>> kernel/smp.c:571:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/smp.c:571:9: sparse:     expected void *ptr
   kernel/smp.c:571:9: sparse:     got int [noderef] __percpu *
>> kernel/smp.c:571:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/smp.c:571:9: sparse:     expected void *ptr
   kernel/smp.c:571:9: sparse:     got int [noderef] __percpu *
>> kernel/smp.c:571:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/smp.c:571:9: sparse:     expected void *ptr
   kernel/smp.c:571:9: sparse:     got int [noderef] __percpu *
   kernel/smp.c:895:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/smp.c:895:9: sparse:     expected void *ptr
   kernel/smp.c:895:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/smp.c:895:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/smp.c:895:9: sparse:     expected void *ptr
   kernel/smp.c:895:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/smp.c:895:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/smp.c:895:9: sparse:     expected void *ptr
   kernel/smp.c:895:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/smp.c:895:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/smp.c:895:9: sparse:     expected void *ptr
   kernel/smp.c:895:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/smp.c:895:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/smp.c:895:9: sparse:     expected void *ptr
   kernel/smp.c:895:9: sparse:     got int [noderef] __percpu *
   kernel/smp.c:895:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/smp.c:895:9: sparse:     expected void *ptr
   kernel/smp.c:895:9: sparse:     got int [noderef] __percpu *
   kernel/smp.c:895:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/smp.c:895:9: sparse:     expected void *ptr
   kernel/smp.c:895:9: sparse:     got int [noderef] __percpu *
   kernel/smp.c:895:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/smp.c:895:9: sparse:     expected void *ptr
   kernel/smp.c:895:9: sparse:     got int [noderef] __percpu *
   kernel/smp.c:905:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/smp.c:905:17: sparse:     expected void *ptr
   kernel/smp.c:905:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/smp.c:905:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/smp.c:905:17: sparse:     expected void *ptr
   kernel/smp.c:905:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/smp.c:905:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/smp.c:905:17: sparse:     expected void *ptr
   kernel/smp.c:905:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/smp.c:905:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/smp.c:905:17: sparse:     expected void *ptr
   kernel/smp.c:905:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/smp.c:905:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/smp.c:905:17: sparse:     expected void *ptr
   kernel/smp.c:905:17: sparse:     got int [noderef] __percpu *
   kernel/smp.c:905:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/smp.c:905:17: sparse:     expected void *ptr
   kernel/smp.c:905:17: sparse:     got int [noderef] __percpu *
   kernel/smp.c:905:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/smp.c:905:17: sparse:     expected void *ptr
   kernel/smp.c:905:17: sparse:     got int [noderef] __percpu *
   kernel/smp.c:905:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/smp.c:905:17: sparse:     expected void *ptr
   kernel/smp.c:905:17: sparse:     got int [noderef] __percpu *
--
>> kernel/sched/fair.c:6475:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/sched/fair.c:6475:9: sparse:     expected void *ptr
   kernel/sched/fair.c:6475:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/sched/fair.c:6475:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/sched/fair.c:6475:9: sparse:     expected void *ptr
   kernel/sched/fair.c:6475:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/sched/fair.c:6475:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/sched/fair.c:6475:9: sparse:     expected void *ptr
   kernel/sched/fair.c:6475:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/sched/fair.c:6475:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/sched/fair.c:6475:9: sparse:     expected void *ptr
   kernel/sched/fair.c:6475:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/sched/fair.c:6475:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/sched/fair.c:6475:9: sparse:     expected void *ptr
   kernel/sched/fair.c:6475:9: sparse:     got int [noderef] __percpu *
>> kernel/sched/fair.c:6475:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/sched/fair.c:6475:9: sparse:     expected void *ptr
   kernel/sched/fair.c:6475:9: sparse:     got int [noderef] __percpu *
>> kernel/sched/fair.c:6475:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/sched/fair.c:6475:9: sparse:     expected void *ptr
   kernel/sched/fair.c:6475:9: sparse:     got int [noderef] __percpu *
>> kernel/sched/fair.c:6475:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/sched/fair.c:6475:9: sparse:     expected void *ptr
   kernel/sched/fair.c:6475:9: sparse:     got int [noderef] __percpu *
   kernel/sched/fair.c:930:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct sched_entity *se @@     got struct sched_entity [noderef] __rcu * @@
   kernel/sched/fair.c:930:34: sparse:     expected struct sched_entity *se
   kernel/sched/fair.c:930:34: sparse:     got struct sched_entity [noderef] __rcu *
   kernel/sched/fair.c:10928:9: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] sd @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/fair.c:10928:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:10928:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:5591:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/fair.c:5591:38: sparse:     expected struct task_struct *curr
   kernel/sched/fair.c:5591:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/fair.c:5846:1: sparse: sparse: symbol '__pcpu_scope_load_balance_mask' was not declared. Should it be static?
   kernel/sched/fair.c:5847:1: sparse: sparse: symbol '__pcpu_scope_select_idle_mask' was not declared. Should it be static?
   kernel/sched/fair.c:6774:20: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] sd @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/fair.c:6774:20: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:6774:20: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:6908:9: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] tmp @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/fair.c:6908:9: sparse:     expected struct sched_domain *[assigned] tmp
   kernel/sched/fair.c:6908:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:7106:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/fair.c:7106:38: sparse:     expected struct task_struct *curr
   kernel/sched/fair.c:7106:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/fair.c:7404:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/fair.c:7404:38: sparse:     expected struct task_struct *curr
   kernel/sched/fair.c:7404:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/fair.c:8389:40: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct sched_domain *child @@     got struct sched_domain [noderef] __rcu *child @@
   kernel/sched/fair.c:8389:40: sparse:     expected struct sched_domain *child
   kernel/sched/fair.c:8389:40: sparse:     got struct sched_domain [noderef] __rcu *child
   kernel/sched/fair.c:8933:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/fair.c:8933:22: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/fair.c:8933:22: sparse:    struct task_struct *
   kernel/sched/fair.c:10203:9: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] sd @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/fair.c:10203:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:10203:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:9863:44: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct sched_domain *sd_parent @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/fair.c:9863:44: sparse:     expected struct sched_domain *sd_parent
   kernel/sched/fair.c:9863:44: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:10299:9: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] sd @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/fair.c:10299:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:10299:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:5520:35: sparse: sparse: marked inline, but without a definition
   kernel/sched/fair.c: note: in included file:
   kernel/sched/sched.h:2018:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2176:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2176:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2176:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2018:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2018:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct *
--
>> kernel/sched/core.c:597:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/sched/core.c:597:9: sparse:     expected void *ptr
   kernel/sched/core.c:597:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/sched/core.c:597:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/sched/core.c:597:9: sparse:     expected void *ptr
   kernel/sched/core.c:597:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/sched/core.c:597:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/sched/core.c:597:9: sparse:     expected void *ptr
   kernel/sched/core.c:597:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/sched/core.c:597:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/sched/core.c:597:9: sparse:     expected void *ptr
   kernel/sched/core.c:597:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/sched/core.c:597:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/sched/core.c:597:9: sparse:     expected void *ptr
   kernel/sched/core.c:597:9: sparse:     got int [noderef] __percpu *
>> kernel/sched/core.c:597:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/sched/core.c:597:9: sparse:     expected void *ptr
   kernel/sched/core.c:597:9: sparse:     got int [noderef] __percpu *
>> kernel/sched/core.c:597:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/sched/core.c:597:9: sparse:     expected void *ptr
   kernel/sched/core.c:597:9: sparse:     got int [noderef] __percpu *
>> kernel/sched/core.c:597:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/sched/core.c:597:9: sparse:     expected void *ptr
   kernel/sched/core.c:597:9: sparse:     got int [noderef] __percpu *
   kernel/sched/core.c:780:48: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/core.c:780:48: sparse:     expected struct task_struct *p
   kernel/sched/core.c:780:48: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:1033:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/core.c:1033:38: sparse:     expected struct task_struct *curr
   kernel/sched/core.c:1033:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:1091:9: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] sd @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/core.c:1091:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/core.c:1091:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/core.c:2197:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/core.c:2197:33: sparse:     expected struct task_struct *p
   kernel/sched/core.c:2197:33: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:2197:68: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *tsk @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/core.c:2197:68: sparse:     expected struct task_struct *tsk
   kernel/sched/core.c:2197:68: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:3597:17: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *[assigned] sd @@     got struct sched_domain [noderef] __rcu *parent @@
   kernel/sched/core.c:3597:17: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/core.c:3597:17: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/core.c:3794:28: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct const *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/core.c:3794:28: sparse:     expected struct task_struct const *p
   kernel/sched/core.c:3794:28: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:9084:43: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *push_task @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/core.c:9084:43: sparse:     expected struct task_struct *push_task
   kernel/sched/core.c:9084:43: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:5404:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/core.c:5404:38: sparse:     expected struct task_struct *curr
   kernel/sched/core.c:5404:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:5495:14: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/core.c:5495:14: sparse:     expected struct task_struct *curr
   kernel/sched/core.c:5495:14: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:6350:14: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct task_struct *prev @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/core.c:6350:14: sparse:     expected struct task_struct *prev
   kernel/sched/core.c:6350:14: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:6872:17: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/core.c:6872:17: sparse:    struct task_struct *
   kernel/sched/core.c:6872:17: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/core.c:7076:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/core.c:7076:22: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/core.c:7076:22: sparse:    struct task_struct *
   kernel/sched/core.c:11116:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/core.c:11116:25: sparse:     expected struct task_struct *p
   kernel/sched/core.c:11116:25: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:537:6: sparse: sparse: context imbalance in 'raw_spin_rq_lock_nested' - wrong count at exit
   kernel/sched/core.c:562:6: sparse: sparse: context imbalance in 'raw_spin_rq_trylock' - wrong count at exit
   kernel/sched/core.c:586:6: sparse: sparse: context imbalance in 'raw_spin_rq_unlock' - unexpected unlock
   kernel/sched/core.c:624:36: sparse: sparse: context imbalance in '__task_rq_lock' - wrong count at exit
   kernel/sched/core.c:665:36: sparse: sparse: context imbalance in 'task_rq_lock' - wrong count at exit
   kernel/sched/core.c: note: in included file:
   kernel/sched/pelt.h:78:13: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct const *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/pelt.h:78:13: sparse:     expected struct task_struct const *p
   kernel/sched/pelt.h:78:13: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:780:11: sparse: sparse: dereference of noderef expression
   kernel/sched/core.c:2188:33: sparse: sparse: dereference of noderef expression
   kernel/sched/core.c:2189:19: sparse: sparse: dereference of noderef expression
   kernel/sched/core.c:2190:18: sparse: sparse: dereference of noderef expression
   kernel/sched/core.c: note: in included file:
   kernel/sched/sched.h:2018:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2176:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2176:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2176:9: sparse:    struct task_struct *
   kernel/sched/core.c:2163:38: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/core.c:2163:38: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/core.c:2163:38: sparse:    struct task_struct const *
   kernel/sched/sched.h:2018:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2176:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2176:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2176:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2176:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2176:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2176:9: sparse:    struct task_struct *
   kernel/sched/core.c: note: in included file (through arch/loongarch/include/asm/cpu-info.h, arch/loongarch/include/asm/processor.h, ...):
   arch/loongarch/include/asm/loongarch.h:242:9: sparse: sparse: undefined identifier '__builtin_loongarch_csrwr_w'
   arch/loongarch/include/asm/loongarch.h:242:9: sparse: sparse: cast from unknown type
   arch/loongarch/include/asm/loongarch.h:247:9: sparse: sparse: undefined identifier '__builtin_loongarch_csrwr_d'
   arch/loongarch/include/asm/loongarch.h:247:9: sparse: sparse: cast from unknown type
   arch/loongarch/include/asm/loongarch.h:247:9: sparse: sparse: cast from unknown type
   arch/loongarch/include/asm/loongarch.h:232:16: sparse: sparse: undefined identifier '__builtin_loongarch_csrrd_w'
   arch/loongarch/include/asm/loongarch.h:232:16: sparse: sparse: cast from unknown type
   arch/loongarch/include/asm/loongarch.h:242:9: sparse: sparse: cast from unknown type
   kernel/sched/core.c: note: in included file:
   kernel/sched/sched.h:2018:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2176:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2176:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2176:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2018:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2176:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2176:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2176:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2018:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2018:25: sparse:    struct task_struct [noderef] __rcu *
--
>> kernel/locking/mutex.c:357:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:357:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:357:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/locking/mutex.c:357:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:357:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:357:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/locking/mutex.c:357:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:357:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:357:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/locking/mutex.c:357:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:357:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:357:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/locking/mutex.c:357:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:357:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:357:9: sparse:     got int [noderef] __percpu *
>> kernel/locking/mutex.c:357:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:357:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:357:9: sparse:     got int [noderef] __percpu *
>> kernel/locking/mutex.c:357:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:357:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:357:9: sparse:     got int [noderef] __percpu *
>> kernel/locking/mutex.c:357:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:357:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:357:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
   kernel/locking/mutex.c:397:9: sparse:     got int [noderef] __percpu *
   kernel/locking/mutex.c:397:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/mutex.c:397:9: sparse:     expected void *ptr
--
>> kernel/locking/rwsem.c:751:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/rwsem.c:751:9: sparse:     expected void *ptr
   kernel/locking/rwsem.c:751:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/locking/rwsem.c:751:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/rwsem.c:751:9: sparse:     expected void *ptr
   kernel/locking/rwsem.c:751:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/locking/rwsem.c:751:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/rwsem.c:751:9: sparse:     expected void *ptr
   kernel/locking/rwsem.c:751:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/locking/rwsem.c:751:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/locking/rwsem.c:751:9: sparse:     expected void *ptr
   kernel/locking/rwsem.c:751:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/locking/rwsem.c:751:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/rwsem.c:751:9: sparse:     expected void *ptr
   kernel/locking/rwsem.c:751:9: sparse:     got int [noderef] __percpu *
>> kernel/locking/rwsem.c:751:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/rwsem.c:751:9: sparse:     expected void *ptr
   kernel/locking/rwsem.c:751:9: sparse:     got int [noderef] __percpu *
>> kernel/locking/rwsem.c:751:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/rwsem.c:751:9: sparse:     expected void *ptr
   kernel/locking/rwsem.c:751:9: sparse:     got int [noderef] __percpu *
>> kernel/locking/rwsem.c:751:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/locking/rwsem.c:751:9: sparse:     expected void *ptr
   kernel/locking/rwsem.c:751:9: sparse:     got int [noderef] __percpu *
--
   kernel/rcu/tree.c: note: in included file:
>> kernel/rcu/tree_exp.h:807:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_exp.h:807:9: sparse:     expected void *ptr
   kernel/rcu/tree_exp.h:807:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_exp.h:807:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_exp.h:807:9: sparse:     expected void *ptr
   kernel/rcu/tree_exp.h:807:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_exp.h:807:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_exp.h:807:9: sparse:     expected void *ptr
   kernel/rcu/tree_exp.h:807:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_exp.h:807:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_exp.h:807:9: sparse:     expected void *ptr
   kernel/rcu/tree_exp.h:807:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_exp.h:807:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_exp.h:807:9: sparse:     expected void *ptr
   kernel/rcu/tree_exp.h:807:9: sparse:     got int [noderef] __percpu *
>> kernel/rcu/tree_exp.h:807:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_exp.h:807:9: sparse:     expected void *ptr
   kernel/rcu/tree_exp.h:807:9: sparse:     got int [noderef] __percpu *
>> kernel/rcu/tree_exp.h:807:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_exp.h:807:9: sparse:     expected void *ptr
   kernel/rcu/tree_exp.h:807:9: sparse:     got int [noderef] __percpu *
>> kernel/rcu/tree_exp.h:807:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_exp.h:807:9: sparse:     expected void *ptr
   kernel/rcu/tree_exp.h:807:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree.c: note: in included file:
>> kernel/rcu/tree_plugin.h:720:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:720:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:720:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_plugin.h:720:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:720:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:720:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_plugin.h:720:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:720:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:720:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_plugin.h:720:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:720:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:720:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_plugin.h:720:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:720:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:720:9: sparse:     got int [noderef] __percpu *
>> kernel/rcu/tree_plugin.h:720:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:720:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:720:9: sparse:     got int [noderef] __percpu *
>> kernel/rcu/tree_plugin.h:720:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:720:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:720:9: sparse:     got int [noderef] __percpu *
>> kernel/rcu/tree_plugin.h:720:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:720:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:720:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_plugin.h:1242:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:1242:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:1242:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_plugin.h:1242:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:1242:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:1242:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_plugin.h:1242:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:1242:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:1242:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_plugin.h:1242:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:1242:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:1242:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_plugin.h:1242:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:1242:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:1242:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_plugin.h:1242:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:1242:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:1242:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_plugin.h:1242:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:1242:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:1242:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_plugin.h:1242:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_plugin.h:1242:9: sparse:     expected void *ptr
   kernel/rcu/tree_plugin.h:1242:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree.c: note: in included file:
>> kernel/rcu/tree_nocb.h:377:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:377:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:377:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_nocb.h:377:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:377:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:377:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_nocb.h:377:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:377:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:377:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_nocb.h:377:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:377:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:377:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_nocb.h:377:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:377:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:377:9: sparse:     got int [noderef] __percpu *
>> kernel/rcu/tree_nocb.h:377:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:377:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:377:9: sparse:     got int [noderef] __percpu *
>> kernel/rcu/tree_nocb.h:377:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:377:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:377:9: sparse:     got int [noderef] __percpu *
>> kernel/rcu/tree_nocb.h:377:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:377:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:377:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:154:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:154:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:154:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:154:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:154:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:154:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:154:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:154:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:154:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:154:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:154:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:154:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:154:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:154:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:154:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:154:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:154:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:154:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:154:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:154:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:154:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:154:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:154:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:154:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:167:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:167:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:167:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:167:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:167:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:167:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:167:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:167:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:167:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:167:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:167:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:167:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:167:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:167:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:167:17: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:167:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:167:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:167:17: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:167:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:167:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:167:17: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:167:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:167:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:167:17: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:180:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:180:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:180:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:180:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:180:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:180:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:180:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:180:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:180:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:180:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:180:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:180:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:180:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:180:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:180:17: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:180:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:180:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:180:17: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:180:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:180:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:180:17: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:180:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:180:17: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:180:17: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:190:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:190:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:190:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:190:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:190:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:190:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:190:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:190:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:190:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:190:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:190:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:190:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:190:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:190:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:190:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:190:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:190:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:190:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:190:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:190:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:190:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_nocb.h:190:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_nocb.h:190:9: sparse:     expected void *ptr
   kernel/rcu/tree_nocb.h:190:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree.c: note: in included file:
>> kernel/rcu/tree_stall.h:224:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:224:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:224:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_stall.h:224:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:224:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:224:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_stall.h:224:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:224:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:224:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_stall.h:224:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:224:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:224:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/rcu/tree_stall.h:224:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:224:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:224:9: sparse:     got int [noderef] __percpu *
>> kernel/rcu/tree_stall.h:224:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:224:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:224:9: sparse:     got int [noderef] __percpu *
>> kernel/rcu/tree_stall.h:224:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:224:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:224:9: sparse:     got int [noderef] __percpu *
>> kernel/rcu/tree_stall.h:224:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:224:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:224:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:700:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:700:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:700:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:700:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:700:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:700:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:700:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:700:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:700:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:700:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:700:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:700:9: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:700:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:700:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:700:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:700:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:700:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:700:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:700:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:700:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:700:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:700:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:700:9: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:700:9: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:941:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:941:17: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:941:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:941:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:941:17: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:941:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:941:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:941:17: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:941:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:941:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:941:17: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:941:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:941:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:941:17: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:941:17: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:941:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:941:17: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:941:17: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:941:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:941:17: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:941:17: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:941:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:941:17: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:941:17: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:957:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:957:25: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:957:25: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:957:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:957:25: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:957:25: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:957:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:957:25: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:957:25: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:957:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:957:25: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:957:25: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:957:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:957:25: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:957:25: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:957:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:957:25: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:957:25: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:957:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:957:25: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:957:25: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:957:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:957:25: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:957:25: sparse:     got int [noderef] __percpu *
   kernel/rcu/tree_stall.h:958:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:958:17: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:958:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:958:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:958:17: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:958:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:958:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/rcu/tree_stall.h:958:17: sparse:     expected void *ptr
   kernel/rcu/tree_stall.h:958:17: sparse:     got unsigned int [noderef] __percpu *
   kernel/rcu/tree_stall.h:958:17: sparse: sparse: too many warnings
--
>> kernel/time/timer.c:1432:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/time/timer.c:1432:17: sparse:     expected void *ptr
   kernel/time/timer.c:1432:17: sparse:     got unsigned int [noderef] __percpu *
>> kernel/time/timer.c:1432:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/time/timer.c:1432:17: sparse:     expected void *ptr
   kernel/time/timer.c:1432:17: sparse:     got unsigned int [noderef] __percpu *
>> kernel/time/timer.c:1432:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/time/timer.c:1432:17: sparse:     expected void *ptr
   kernel/time/timer.c:1432:17: sparse:     got unsigned int [noderef] __percpu *
>> kernel/time/timer.c:1432:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/time/timer.c:1432:17: sparse:     expected void *ptr
   kernel/time/timer.c:1432:17: sparse:     got unsigned int [noderef] __percpu *
>> kernel/time/timer.c:1432:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/time/timer.c:1432:17: sparse:     expected void *ptr
   kernel/time/timer.c:1432:17: sparse:     got int [noderef] __percpu *
>> kernel/time/timer.c:1432:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/time/timer.c:1432:17: sparse:     expected void *ptr
   kernel/time/timer.c:1432:17: sparse:     got int [noderef] __percpu *
>> kernel/time/timer.c:1432:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/time/timer.c:1432:17: sparse:     expected void *ptr
   kernel/time/timer.c:1432:17: sparse:     got int [noderef] __percpu *
>> kernel/time/timer.c:1432:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/time/timer.c:1432:17: sparse:     expected void *ptr
   kernel/time/timer.c:1432:17: sparse:     got int [noderef] __percpu *

vim +571 kernel/smp.c

8d056c48e48624 Srivatsa S. Bhat    2014-06-23  549  
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  550  /**
16bf5a5e1ec564 Thomas Gleixner     2022-04-13  551   * __flush_smp_call_function_queue - Flush pending smp-call-function callbacks
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  552   *
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  553   * @warn_cpu_offline: If set to 'true', warn if callbacks were queued on an
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  554   *		      offline CPU. Skip this check if set to 'false'.
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  555   *
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  556   * Flush any pending smp-call-function callbacks queued on this CPU. This is
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  557   * invoked by the generic IPI handler, as well as by a CPU about to go offline,
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  558   * to ensure that all pending IPI callbacks are run before it goes completely
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  559   * offline.
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  560   *
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  561   * Loop through the call_single_queue and run all the queued callbacks.
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  562   * Must be called with interrupts disabled.
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  563   */
16bf5a5e1ec564 Thomas Gleixner     2022-04-13  564  static void __flush_smp_call_function_queue(bool warn_cpu_offline)
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  565  {
966a967116e699 Ying Huang          2017-08-08  566  	call_single_data_t *csd, *csd_next;
52103be07d8b08 Peter Zijlstra      2020-05-26  567  	struct llist_node *entry, *prev;
52103be07d8b08 Peter Zijlstra      2020-05-26  568  	struct llist_head *head;
a219ccf4637396 Srivatsa S. Bhat    2014-06-06  569  	static bool warned;
a219ccf4637396 Srivatsa S. Bhat    2014-06-06  570  
83efcbd028ad3a Frederic Weisbecker 2017-11-06 @571  	lockdep_assert_irqs_disabled();
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  572  
bb964a92ce70ac Christoph Lameter   2014-08-17  573  	head = this_cpu_ptr(&call_single_queue);
a5aabace5fb8ab Juergen Gross       2021-03-01  574  	cfd_seq_store(this_cpu_ptr(&cfd_seq_local)->handle, CFD_SEQ_NOCPU,
a5aabace5fb8ab Juergen Gross       2021-03-01  575  		      smp_processor_id(), CFD_SEQ_HANDLE);
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  576  	entry = llist_del_all(head);
a5aabace5fb8ab Juergen Gross       2021-03-01  577  	cfd_seq_store(this_cpu_ptr(&cfd_seq_local)->dequeue,
a5aabace5fb8ab Juergen Gross       2021-03-01  578  		      /* Special meaning of source cpu: 0 == queue empty */
a5aabace5fb8ab Juergen Gross       2021-03-01  579  		      entry ? CFD_SEQ_NOCPU : 0,
a5aabace5fb8ab Juergen Gross       2021-03-01  580  		      smp_processor_id(), CFD_SEQ_DEQUEUE);
a219ccf4637396 Srivatsa S. Bhat    2014-06-06  581  	entry = llist_reverse_order(entry);
3d4422332711ef Jens Axboe          2008-06-26  582  
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  583  	/* There shouldn't be any pending callbacks on an offline CPU. */
8d056c48e48624 Srivatsa S. Bhat    2014-06-23  584  	if (unlikely(warn_cpu_offline && !cpu_online(smp_processor_id()) &&
9e949a3886356f Nadav Amit          2022-03-19  585  		     !warned && entry != NULL)) {
a219ccf4637396 Srivatsa S. Bhat    2014-06-06  586  		warned = true;
a219ccf4637396 Srivatsa S. Bhat    2014-06-06  587  		WARN(1, "IPI on offline CPU %d\n", smp_processor_id());
269c861baa2fe7 Suresh Siddha       2009-08-19  588  
a219ccf4637396 Srivatsa S. Bhat    2014-06-06  589  		/*
a219ccf4637396 Srivatsa S. Bhat    2014-06-06  590  		 * We don't have to use the _safe() variant here
a219ccf4637396 Srivatsa S. Bhat    2014-06-06  591  		 * because we are not invoking the IPI handlers yet.
a219ccf4637396 Srivatsa S. Bhat    2014-06-06  592  		 */
545b8c8df41f9e Peter Zijlstra      2020-06-15  593  		llist_for_each_entry(csd, entry, node.llist) {
4b44a21dd640b6 Peter Zijlstra      2020-05-26  594  			switch (CSD_TYPE(csd)) {
4b44a21dd640b6 Peter Zijlstra      2020-05-26  595  			case CSD_TYPE_ASYNC:
4b44a21dd640b6 Peter Zijlstra      2020-05-26  596  			case CSD_TYPE_SYNC:
4b44a21dd640b6 Peter Zijlstra      2020-05-26  597  			case CSD_TYPE_IRQ_WORK:
a219ccf4637396 Srivatsa S. Bhat    2014-06-06  598  				pr_warn("IPI callback %pS sent to offline CPU\n",
a219ccf4637396 Srivatsa S. Bhat    2014-06-06  599  					csd->func);
4b44a21dd640b6 Peter Zijlstra      2020-05-26  600  				break;
4b44a21dd640b6 Peter Zijlstra      2020-05-26  601  
a148866489fbe2 Peter Zijlstra      2020-05-26  602  			case CSD_TYPE_TTWU:
a148866489fbe2 Peter Zijlstra      2020-05-26  603  				pr_warn("IPI task-wakeup sent to offline CPU\n");
a148866489fbe2 Peter Zijlstra      2020-05-26  604  				break;
a148866489fbe2 Peter Zijlstra      2020-05-26  605  
4b44a21dd640b6 Peter Zijlstra      2020-05-26  606  			default:
4b44a21dd640b6 Peter Zijlstra      2020-05-26  607  				pr_warn("IPI callback, unknown type %d, sent to offline CPU\n",
4b44a21dd640b6 Peter Zijlstra      2020-05-26  608  					CSD_TYPE(csd));
4b44a21dd640b6 Peter Zijlstra      2020-05-26  609  				break;
4b44a21dd640b6 Peter Zijlstra      2020-05-26  610  			}
4b44a21dd640b6 Peter Zijlstra      2020-05-26  611  		}
a219ccf4637396 Srivatsa S. Bhat    2014-06-06  612  	}
3d4422332711ef Jens Axboe          2008-06-26  613  
52103be07d8b08 Peter Zijlstra      2020-05-26  614  	/*
52103be07d8b08 Peter Zijlstra      2020-05-26  615  	 * First; run all SYNC callbacks, people are waiting for us.
52103be07d8b08 Peter Zijlstra      2020-05-26  616  	 */
52103be07d8b08 Peter Zijlstra      2020-05-26  617  	prev = NULL;
545b8c8df41f9e Peter Zijlstra      2020-06-15  618  	llist_for_each_entry_safe(csd, csd_next, entry, node.llist) {
4b44a21dd640b6 Peter Zijlstra      2020-05-26  619  		/* Do we wait until *after* callback? */
4b44a21dd640b6 Peter Zijlstra      2020-05-26  620  		if (CSD_TYPE(csd) == CSD_TYPE_SYNC) {
8053871d0f7f67 Linus Torvalds      2015-02-11  621  			smp_call_func_t func = csd->func;
8053871d0f7f67 Linus Torvalds      2015-02-11  622  			void *info = csd->info;
8053871d0f7f67 Linus Torvalds      2015-02-11  623  
52103be07d8b08 Peter Zijlstra      2020-05-26  624  			if (prev) {
545b8c8df41f9e Peter Zijlstra      2020-06-15  625  				prev->next = &csd_next->node.llist;
52103be07d8b08 Peter Zijlstra      2020-05-26  626  			} else {
545b8c8df41f9e Peter Zijlstra      2020-06-15  627  				entry = &csd_next->node.llist;
52103be07d8b08 Peter Zijlstra      2020-05-26  628  			}
4b44a21dd640b6 Peter Zijlstra      2020-05-26  629  
35feb60474bf4f Paul E. McKenney    2020-06-30  630  			csd_lock_record(csd);
8053871d0f7f67 Linus Torvalds      2015-02-11  631  			func(info);
8053871d0f7f67 Linus Torvalds      2015-02-11  632  			csd_unlock(csd);
35feb60474bf4f Paul E. McKenney    2020-06-30  633  			csd_lock_record(NULL);
8053871d0f7f67 Linus Torvalds      2015-02-11  634  		} else {
545b8c8df41f9e Peter Zijlstra      2020-06-15  635  			prev = &csd->node.llist;
52103be07d8b08 Peter Zijlstra      2020-05-26  636  		}
52103be07d8b08 Peter Zijlstra      2020-05-26  637  	}
52103be07d8b08 Peter Zijlstra      2020-05-26  638  
a5aabace5fb8ab Juergen Gross       2021-03-01  639  	if (!entry) {
a5aabace5fb8ab Juergen Gross       2021-03-01  640  		cfd_seq_store(this_cpu_ptr(&cfd_seq_local)->hdlend,
a5aabace5fb8ab Juergen Gross       2021-03-01  641  			      0, smp_processor_id(),
a5aabace5fb8ab Juergen Gross       2021-03-01  642  			      CFD_SEQ_HDLEND);
a148866489fbe2 Peter Zijlstra      2020-05-26  643  		return;
a5aabace5fb8ab Juergen Gross       2021-03-01  644  	}
a148866489fbe2 Peter Zijlstra      2020-05-26  645  
52103be07d8b08 Peter Zijlstra      2020-05-26  646  	/*
52103be07d8b08 Peter Zijlstra      2020-05-26  647  	 * Second; run all !SYNC callbacks.
52103be07d8b08 Peter Zijlstra      2020-05-26  648  	 */
a148866489fbe2 Peter Zijlstra      2020-05-26  649  	prev = NULL;
545b8c8df41f9e Peter Zijlstra      2020-06-15  650  	llist_for_each_entry_safe(csd, csd_next, entry, node.llist) {
4b44a21dd640b6 Peter Zijlstra      2020-05-26  651  		int type = CSD_TYPE(csd);
4b44a21dd640b6 Peter Zijlstra      2020-05-26  652  
a148866489fbe2 Peter Zijlstra      2020-05-26  653  		if (type != CSD_TYPE_TTWU) {
a148866489fbe2 Peter Zijlstra      2020-05-26  654  			if (prev) {
545b8c8df41f9e Peter Zijlstra      2020-06-15  655  				prev->next = &csd_next->node.llist;
a148866489fbe2 Peter Zijlstra      2020-05-26  656  			} else {
545b8c8df41f9e Peter Zijlstra      2020-06-15  657  				entry = &csd_next->node.llist;
a148866489fbe2 Peter Zijlstra      2020-05-26  658  			}
a148866489fbe2 Peter Zijlstra      2020-05-26  659  
4b44a21dd640b6 Peter Zijlstra      2020-05-26  660  			if (type == CSD_TYPE_ASYNC) {
52103be07d8b08 Peter Zijlstra      2020-05-26  661  				smp_call_func_t func = csd->func;
52103be07d8b08 Peter Zijlstra      2020-05-26  662  				void *info = csd->info;
52103be07d8b08 Peter Zijlstra      2020-05-26  663  
35feb60474bf4f Paul E. McKenney    2020-06-30  664  				csd_lock_record(csd);
e1d12f327037a5 Andrew Morton       2013-04-30  665  				csd_unlock(csd);
8053871d0f7f67 Linus Torvalds      2015-02-11  666  				func(info);
35feb60474bf4f Paul E. McKenney    2020-06-30  667  				csd_lock_record(NULL);
4b44a21dd640b6 Peter Zijlstra      2020-05-26  668  			} else if (type == CSD_TYPE_IRQ_WORK) {
4b44a21dd640b6 Peter Zijlstra      2020-05-26  669  				irq_work_single(csd);
4b44a21dd640b6 Peter Zijlstra      2020-05-26  670  			}
a148866489fbe2 Peter Zijlstra      2020-05-26  671  
a148866489fbe2 Peter Zijlstra      2020-05-26  672  		} else {
545b8c8df41f9e Peter Zijlstra      2020-06-15  673  			prev = &csd->node.llist;
8053871d0f7f67 Linus Torvalds      2015-02-11  674  		}
3d4422332711ef Jens Axboe          2008-06-26  675  	}
478850160636c4 Frederic Weisbecker 2014-05-08  676  
478850160636c4 Frederic Weisbecker 2014-05-08  677  	/*
a148866489fbe2 Peter Zijlstra      2020-05-26  678  	 * Third; only CSD_TYPE_TTWU is left, issue those.
478850160636c4 Frederic Weisbecker 2014-05-08  679  	 */
a148866489fbe2 Peter Zijlstra      2020-05-26  680  	if (entry)
a148866489fbe2 Peter Zijlstra      2020-05-26  681  		sched_ttwu_pending(entry);
a5aabace5fb8ab Juergen Gross       2021-03-01  682  
a5aabace5fb8ab Juergen Gross       2021-03-01  683  	cfd_seq_store(this_cpu_ptr(&cfd_seq_local)->hdlend, CFD_SEQ_NOCPU,
a5aabace5fb8ab Juergen Gross       2021-03-01  684  		      smp_processor_id(), CFD_SEQ_HDLEND);
a148866489fbe2 Peter Zijlstra      2020-05-26  685  }
a148866489fbe2 Peter Zijlstra      2020-05-26  686  

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp
Re: [PATCH 3/4] LoongArch: Add stacktrace support
Posted by kernel test robot 3 years, 8 months ago 
Hi Qing,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.19]
[cannot apply to next-20220812]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Qing-Zhang/LoongArch-Add-unwinder-support/20220801-204020
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3d7cb6b04c3f3115719235cc6866b10326de34cd
config: loongarch-randconfig-s041-20220814 (https://download.01.org/0day-ci/archive/20220814/202208140621.UKarxp6n-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/intel-lab-lkp/linux/commit/102a43b57dafc9c0058a458a62d4133eb8020cbc
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Qing-Zhang/LoongArch-Add-unwinder-support/20220801-204020
        git checkout 102a43b57dafc9c0058a458a62d4133eb8020cbc
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=loongarch SHELL=/bin/bash kernel/time/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

sparse warnings: (new ones prefixed by >>)
>> kernel/time/tick-sched.c:1151:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/time/tick-sched.c:1151:9: sparse:     expected void *ptr
   kernel/time/tick-sched.c:1151:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/time/tick-sched.c:1151:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/time/tick-sched.c:1151:9: sparse:     expected void *ptr
   kernel/time/tick-sched.c:1151:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/time/tick-sched.c:1151:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/time/tick-sched.c:1151:9: sparse:     expected void *ptr
   kernel/time/tick-sched.c:1151:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/time/tick-sched.c:1151:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got unsigned int [noderef] __percpu * @@
   kernel/time/tick-sched.c:1151:9: sparse:     expected void *ptr
   kernel/time/tick-sched.c:1151:9: sparse:     got unsigned int [noderef] __percpu *
>> kernel/time/tick-sched.c:1151:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/time/tick-sched.c:1151:9: sparse:     expected void *ptr
   kernel/time/tick-sched.c:1151:9: sparse:     got int [noderef] __percpu *
>> kernel/time/tick-sched.c:1151:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/time/tick-sched.c:1151:9: sparse:     expected void *ptr
   kernel/time/tick-sched.c:1151:9: sparse:     got int [noderef] __percpu *
>> kernel/time/tick-sched.c:1151:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/time/tick-sched.c:1151:9: sparse:     expected void *ptr
   kernel/time/tick-sched.c:1151:9: sparse:     got int [noderef] __percpu *
>> kernel/time/tick-sched.c:1151:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void *ptr @@     got int [noderef] __percpu * @@
   kernel/time/tick-sched.c:1151:9: sparse:     expected void *ptr
   kernel/time/tick-sched.c:1151:9: sparse:     got int [noderef] __percpu *

vim +1151 kernel/time/tick-sched.c

554c8aa8ecade2 Rafael J. Wysocki   2018-04-03  1141  
0e7767687fdabf Rafael J. Wysocki   2018-04-05  1142  /**
0e7767687fdabf Rafael J. Wysocki   2018-04-05  1143   * tick_nohz_idle_enter - prepare for entering idle on the current CPU
2bbb6817c0ac1b Frederic Weisbecker 2011-10-08  1144   *
0e7767687fdabf Rafael J. Wysocki   2018-04-05  1145   * Called when we start the idle loop.
280f06774afedf Frederic Weisbecker 2011-10-07  1146   */
1268fbc746ea1c Frederic Weisbecker 2011-11-17  1147  void tick_nohz_idle_enter(void)
280f06774afedf Frederic Weisbecker 2011-10-07  1148  {
280f06774afedf Frederic Weisbecker 2011-10-07  1149  	struct tick_sched *ts;
280f06774afedf Frederic Weisbecker 2011-10-07  1150  
ebf3adbad012b8 Frederic Weisbecker 2017-11-06 @1151  	lockdep_assert_irqs_enabled();
0db49b72bce263 Linus Torvalds      2012-01-06  1152  
1268fbc746ea1c Frederic Weisbecker 2011-11-17  1153  	local_irq_disable();
1268fbc746ea1c Frederic Weisbecker 2011-11-17  1154  
22127e93c587af Christoph Lameter   2014-08-17  1155  	ts = this_cpu_ptr(&tick_cpu_sched);
23a8d888107ce4 Rafael J. Wysocki   2018-04-05  1156  
23a8d888107ce4 Rafael J. Wysocki   2018-04-05  1157  	WARN_ON_ONCE(ts->timer_expires_base);
23a8d888107ce4 Rafael J. Wysocki   2018-04-05  1158  
280f06774afedf Frederic Weisbecker 2011-10-07  1159  	ts->inidle = 1;
0e7767687fdabf Rafael J. Wysocki   2018-04-05  1160  	tick_nohz_start_idle(ts);
1268fbc746ea1c Frederic Weisbecker 2011-11-17  1161  
1268fbc746ea1c Frederic Weisbecker 2011-11-17  1162  	local_irq_enable();
280f06774afedf Frederic Weisbecker 2011-10-07  1163  }
280f06774afedf Frederic Weisbecker 2011-10-07  1164  

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp
Re: [PATCH 3/4] LoongArch: Add stacktrace support
Posted by Huacai Chen 3 years, 8 months ago 
Hi, Qing,

On Mon, Aug 1, 2022 at 8:17 PM Qing Zhang <zhangqing@loongson.cn> wrote:
>
> Use common arch_stack_walk infrastructure to avoid duplicated code and
> avoid taking care of the stack storage and filtering.
> Add sra (means __schedule return address) and scfa (means __schedule call
> frame address) to thread_info and store it in switch_to().
>
> Now we can print the process stack by cat /proc/*/stack and can better
> support ftrace.
>
> Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
> ---
>  arch/loongarch/Kconfig                 |  5 ++++
>  arch/loongarch/include/asm/processor.h |  9 +++++++
>  arch/loongarch/include/asm/switch_to.h | 14 ++++++----
>  arch/loongarch/include/asm/uaccess.h   |  4 +--
>  arch/loongarch/kernel/Makefile         |  1 +
>  arch/loongarch/kernel/asm-offsets.c    |  2 ++
>  arch/loongarch/kernel/process.c        |  3 +++
>  arch/loongarch/kernel/stacktrace.c     | 37 ++++++++++++++++++++++++++
>  arch/loongarch/kernel/switch.S         |  2 ++
>  9 files changed, 70 insertions(+), 7 deletions(-)
>  create mode 100644 arch/loongarch/kernel/stacktrace.c
>
> diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
> index 62b5b07fa4e1..85d0fa3147cd 100644
> --- a/arch/loongarch/Kconfig
> +++ b/arch/loongarch/Kconfig
> @@ -38,6 +38,7 @@ config LOONGARCH
>         select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION
>         select ARCH_MIGHT_HAVE_PC_PARPORT
>         select ARCH_MIGHT_HAVE_PC_SERIO
> +       select ARCH_STACKWALK
>         select ARCH_SPARSEMEM_ENABLE
>         select ARCH_SUPPORTS_ACPI
>         select ARCH_SUPPORTS_ATOMIC_RMW
> @@ -140,6 +141,10 @@ config LOCKDEP_SUPPORT
>         bool
>         default y
>
> +config STACKTRACE_SUPPORT
> +       bool
> +       default y
> +
>  # MACH_LOONGSON32 and MACH_LOONGSON64 are delibrately carried over from the
>  # MIPS Loongson code, to preserve Loongson-specific code paths in drivers that
>  # are shared between architectures, and specifically expecting the symbols.
> diff --git a/arch/loongarch/include/asm/processor.h b/arch/loongarch/include/asm/processor.h
> index 57ec45aa078e..1c4b4308378d 100644
> --- a/arch/loongarch/include/asm/processor.h
> +++ b/arch/loongarch/include/asm/processor.h
> @@ -101,6 +101,10 @@ struct thread_struct {
>         unsigned long reg23, reg24, reg25, reg26; /* s0-s3 */
>         unsigned long reg27, reg28, reg29, reg30, reg31; /* s4-s8 */
>
> +       /* __schedule() return address / call frame address */
> +       unsigned long sched_ra;
> +       unsigned long sched_cfa;
> +
>         /* CSR registers */
>         unsigned long csr_prmd;
>         unsigned long csr_crmd;
> @@ -129,6 +133,9 @@ struct thread_struct {
>         struct loongarch_fpu fpu FPU_ALIGN;
>  };
>
> +#define thread_saved_ra(tsk)   (tsk->thread.sched_ra)
> +#define thread_saved_fp(tsk)   (tsk->thread.sched_cfa)
> +
>  #define INIT_THREAD  {                                         \
>         /*                                                      \
>          * Main processor registers                             \
> @@ -145,6 +152,8 @@ struct thread_struct {
>         .reg29                  = 0,                            \
>         .reg30                  = 0,                            \
>         .reg31                  = 0,                            \
> +       .sched_ra               = 0,                            \
> +       .sched_cfa              = 0,                            \
>         .csr_crmd               = 0,                            \
>         .csr_prmd               = 0,                            \
>         .csr_euen               = 0,                            \
> diff --git a/arch/loongarch/include/asm/switch_to.h b/arch/loongarch/include/asm/switch_to.h
> index 2a8d04375574..43a5ab162d38 100644
> --- a/arch/loongarch/include/asm/switch_to.h
> +++ b/arch/loongarch/include/asm/switch_to.h
> @@ -15,12 +15,15 @@ struct task_struct;
>   * @prev:      The task previously executed.
>   * @next:      The task to begin executing.
>   * @next_ti:   task_thread_info(next).
> + * @sched_ra:  __schedule return address.
> + * @sched_cfa: __schedule call frame address.
>   *
>   * This function is used whilst scheduling to save the context of prev & load
>   * the context of next. Returns prev.
>   */
>  extern asmlinkage struct task_struct *__switch_to(struct task_struct *prev,
> -                       struct task_struct *next, struct thread_info *next_ti);
> +                       struct task_struct *next, struct thread_info *next_ti,
> +                       void *sched_ra, void *sched_cfa);
>
>  /*
>   * For newly created kernel threads switch_to() will return to
> @@ -28,10 +31,11 @@ extern asmlinkage struct task_struct *__switch_to(struct task_struct *prev,
>   * That is, everything following __switch_to() will be skipped for new threads.
>   * So everything that matters to new threads should be placed before __switch_to().
>   */
> -#define switch_to(prev, next, last)                                    \
> -do {                                                                   \
> -       lose_fpu_inatomic(1, prev);                                     \
> -       (last) = __switch_to(prev, next, task_thread_info(next));       \
> +#define switch_to(prev, next, last)                                            \
> +do {                                                                           \
> +       lose_fpu_inatomic(1, prev);                                             \
> +       (last) = __switch_to(prev, next, task_thread_info(next),                \
> +                __builtin_return_address(0), __builtin_frame_address(0));      \
>  } while (0)
>
>  #endif /* _ASM_SWITCH_TO_H */
> diff --git a/arch/loongarch/include/asm/uaccess.h b/arch/loongarch/include/asm/uaccess.h
> index 2b44edc604a2..a8ae2af4025a 100644
> --- a/arch/loongarch/include/asm/uaccess.h
> +++ b/arch/loongarch/include/asm/uaccess.h
> @@ -229,13 +229,13 @@ extern unsigned long __copy_user(void *to, const void *from, __kernel_size_t n);
>  static inline unsigned long __must_check
>  raw_copy_from_user(void *to, const void __user *from, unsigned long n)
>  {
> -       return __copy_user(to, from, n);
> +       return __copy_user(to, (__force const void *)from, n);
>  }
>
>  static inline unsigned long __must_check
>  raw_copy_to_user(void __user *to, const void *from, unsigned long n)
>  {
> -       return __copy_user(to, from, n);
> +       return __copy_user((__force void *)to, from, n);
Why this? Does it have something to do with stacktrace?

Huacai
>  }
>
>  #define INLINE_COPY_FROM_USER
> diff --git a/arch/loongarch/kernel/Makefile b/arch/loongarch/kernel/Makefile
> index 918600e7b30f..7449513eb08d 100644
> --- a/arch/loongarch/kernel/Makefile
> +++ b/arch/loongarch/kernel/Makefile
> @@ -15,6 +15,7 @@ obj-$(CONFIG_EFI)             += efi.o
>  obj-$(CONFIG_CPU_HAS_FPU)      += fpu.o
>
>  obj-$(CONFIG_MODULES)          += module.o module-sections.o
> +obj-$(CONFIG_STACKTRACE)        += stacktrace.o
>
>  obj-$(CONFIG_PROC_FS)          += proc.o
>
> diff --git a/arch/loongarch/kernel/asm-offsets.c b/arch/loongarch/kernel/asm-offsets.c
> index 20cd9e16a95a..eb350f3ffae5 100644
> --- a/arch/loongarch/kernel/asm-offsets.c
> +++ b/arch/loongarch/kernel/asm-offsets.c
> @@ -103,6 +103,8 @@ void output_thread_defines(void)
>         OFFSET(THREAD_REG29, task_struct, thread.reg29);
>         OFFSET(THREAD_REG30, task_struct, thread.reg30);
>         OFFSET(THREAD_REG31, task_struct, thread.reg31);
> +       OFFSET(THREAD_SCHED_RA, task_struct, thread.sched_ra);
> +       OFFSET(THREAD_SCHED_CFA, task_struct, thread.sched_cfa);
>         OFFSET(THREAD_CSRCRMD, task_struct,
>                thread.csr_crmd);
>         OFFSET(THREAD_CSRPRMD, task_struct,
> diff --git a/arch/loongarch/kernel/process.c b/arch/loongarch/kernel/process.c
> index 709b7a1664f8..34c3f2148714 100644
> --- a/arch/loongarch/kernel/process.c
> +++ b/arch/loongarch/kernel/process.c
> @@ -135,6 +135,7 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
>         childregs = (struct pt_regs *) childksp - 1;
>         /*  Put the stack after the struct pt_regs.  */
>         childksp = (unsigned long) childregs;
> +       p->thread.sched_cfa = 0;
>         p->thread.csr_euen = 0;
>         p->thread.csr_crmd = csr_read32(LOONGARCH_CSR_CRMD);
>         p->thread.csr_prmd = csr_read32(LOONGARCH_CSR_PRMD);
> @@ -145,6 +146,7 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
>                 p->thread.reg23 = (unsigned long)args->fn;
>                 p->thread.reg24 = (unsigned long)args->fn_arg;
>                 p->thread.reg01 = (unsigned long)ret_from_kernel_thread;
> +               p->thread.sched_ra = (unsigned long)ret_from_kernel_thread;
>                 memset(childregs, 0, sizeof(struct pt_regs));
>                 childregs->csr_euen = p->thread.csr_euen;
>                 childregs->csr_crmd = p->thread.csr_crmd;
> @@ -161,6 +163,7 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
>
>         p->thread.reg03 = (unsigned long) childregs;
>         p->thread.reg01 = (unsigned long) ret_from_fork;
> +       p->thread.sched_ra = (unsigned long) ret_from_fork;
>
>         /*
>          * New tasks lose permission to use the fpu. This accelerates context
> diff --git a/arch/loongarch/kernel/stacktrace.c b/arch/loongarch/kernel/stacktrace.c
> new file mode 100644
> index 000000000000..f4f4b8ad3917
> --- /dev/null
> +++ b/arch/loongarch/kernel/stacktrace.c
> @@ -0,0 +1,37 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Stack trace management functions
> + *
> + * Copyright (C) 2022 Loongson Technology Corporation Limited
> + */
> +#include <linux/sched.h>
> +#include <linux/stacktrace.h>
> +
> +#include <asm/stacktrace.h>
> +#include <asm/unwind.h>
> +
> +void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie,
> +                    struct task_struct *task, struct pt_regs *regs)
> +{
> +       struct pt_regs dummyregs;
> +       struct unwind_state state;
> +       unsigned long addr;
> +
> +       regs = &dummyregs;
> +
> +       if (task == current) {
> +               regs->csr_era = (unsigned long)__builtin_return_address(0);
> +               regs->regs[3] = (unsigned long)__builtin_frame_address(0);
> +       } else {
> +               regs->csr_era = thread_saved_ra(task);
> +               regs->regs[3] = thread_saved_fp(task);
> +       }
> +
> +       regs->regs[1] = 0;
> +       for (unwind_start(&state, task, regs);
> +             !unwind_done(&state); unwind_next_frame(&state)) {
> +               addr = unwind_get_return_address(&state);
> +               if (!addr || !consume_entry(cookie, addr))
> +                       break;
> +       }
> +}
> diff --git a/arch/loongarch/kernel/switch.S b/arch/loongarch/kernel/switch.S
> index 37e84ac8ffc2..43ebbc3990f7 100644
> --- a/arch/loongarch/kernel/switch.S
> +++ b/arch/loongarch/kernel/switch.S
> @@ -21,6 +21,8 @@ SYM_FUNC_START(__switch_to)
>
>         cpu_save_nonscratch a0
>         stptr.d ra, a0, THREAD_REG01
> +       stptr.d a3, a0, THREAD_SCHED_RA
> +       stptr.d a4, a0, THREAD_SCHED_CFA
>         move    tp, a2
>         cpu_restore_nonscratch a1
>
> --
> 2.20.1
>
Re: [PATCH 3/4] LoongArch: Add stacktrace support
Posted by zhangqing 3 years, 8 months ago 

On 2022/8/1 下午11:30, Huacai Chen wrote:
> Hi, Qing,
> 
> On Mon, Aug 1, 2022 at 8:17 PM Qing Zhang <zhangqing@loongson.cn> wrote:
>>
>> Use common arch_stack_walk infrastructure to avoid duplicated code and
>> avoid taking care of the stack storage and filtering.
>> Add sra (means __schedule return address) and scfa (means __schedule call
>> frame address) to thread_info and store it in switch_to().
>>
>> Now we can print the process stack by cat /proc/*/stack and can better
>> support ftrace.
>>
>> Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
>> ---
>>   arch/loongarch/Kconfig                 |  5 ++++
>>   arch/loongarch/include/asm/processor.h |  9 +++++++
>>   arch/loongarch/include/asm/switch_to.h | 14 ++++++----
>>   arch/loongarch/include/asm/uaccess.h   |  4 +--
>>   arch/loongarch/kernel/Makefile         |  1 +
>>   arch/loongarch/kernel/asm-offsets.c    |  2 ++
>>   arch/loongarch/kernel/process.c        |  3 +++
>>   arch/loongarch/kernel/stacktrace.c     | 37 ++++++++++++++++++++++++++
>>   arch/loongarch/kernel/switch.S         |  2 ++
>>   9 files changed, 70 insertions(+), 7 deletions(-)
>>   create mode 100644 arch/loongarch/kernel/stacktrace.c
>>
>> diff --git a/arch/loongarch/include/asm/uaccess.h b/arch/loongarch/include/asm/uaccess.h
>> index 2b44edc604a2..a8ae2af4025a 100644
>> --- a/arch/loongarch/include/asm/uaccess.h
>> +++ b/arch/loongarch/include/asm/uaccess.h
>> @@ -229,13 +229,13 @@ extern unsigned long __copy_user(void *to, const void *from, __kernel_size_t n);
>>   static inline unsigned long __must_check
>>   raw_copy_from_user(void *to, const void __user *from, unsigned long n)
>>   {
>> -       return __copy_user(to, from, n);
>> +       return __copy_user(to, (__force const void *)from, n);
>>   }
>>
>>   static inline unsigned long __must_check
>>   raw_copy_to_user(void __user *to, const void *from, unsigned long n)
>>   {
>> -       return __copy_user(to, from, n);
>> +       return __copy_user((__force void *)to, from, n);
> Why this? Does it have something to do with stacktrace?
> 
> Huacai

Hi, huacai

This is kernel test robot report sparse warnings:
I reproduced locally and found that other architectures calling 
__copy_user also use __force conversion, Is this modification appropriate?

kernel/trace/trace_events_user.c: note: in included file (through 
include/linux/uaccess.h, include/linux/sched/task.h, 
include/linux/sched/signal.h, ...):
    arch/loongarch/include/asm/uaccess.h:232:32: sparse: sparse: 
incorrect type in argument 2 (different address spaces) @@     expected 
void const *from @@     got void const [noderef] __user *from @@
    arch/loongarch/include/asm/uaccess.h:232:32: sparse:     expected 
void const *from
    arch/loongarch/include/asm/uaccess.h:232:32: sparse:     got void 
const [noderef] __user *from

Thanks,
-Qing
Re: [PATCH 3/4] LoongArch: Add stacktrace support
Posted by Huacai Chen 3 years, 8 months ago 
Hi, Qing,

On Tue, Aug 2, 2022 at 9:20 AM zhangqing <zhangqing@loongson.cn> wrote:
>
>
>
> On 2022/8/1 下午11:30, Huacai Chen wrote:
> > Hi, Qing,
> >
> > On Mon, Aug 1, 2022 at 8:17 PM Qing Zhang <zhangqing@loongson.cn> wrote:
> >>
> >> Use common arch_stack_walk infrastructure to avoid duplicated code and
> >> avoid taking care of the stack storage and filtering.
> >> Add sra (means __schedule return address) and scfa (means __schedule call
> >> frame address) to thread_info and store it in switch_to().
> >>
> >> Now we can print the process stack by cat /proc/*/stack and can better
> >> support ftrace.
> >>
> >> Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
> >> ---
> >>   arch/loongarch/Kconfig                 |  5 ++++
> >>   arch/loongarch/include/asm/processor.h |  9 +++++++
> >>   arch/loongarch/include/asm/switch_to.h | 14 ++++++----
> >>   arch/loongarch/include/asm/uaccess.h   |  4 +--
> >>   arch/loongarch/kernel/Makefile         |  1 +
> >>   arch/loongarch/kernel/asm-offsets.c    |  2 ++
> >>   arch/loongarch/kernel/process.c        |  3 +++
> >>   arch/loongarch/kernel/stacktrace.c     | 37 ++++++++++++++++++++++++++
> >>   arch/loongarch/kernel/switch.S         |  2 ++
> >>   9 files changed, 70 insertions(+), 7 deletions(-)
> >>   create mode 100644 arch/loongarch/kernel/stacktrace.c
> >>
> >> diff --git a/arch/loongarch/include/asm/uaccess.h b/arch/loongarch/include/asm/uaccess.h
> >> index 2b44edc604a2..a8ae2af4025a 100644
> >> --- a/arch/loongarch/include/asm/uaccess.h
> >> +++ b/arch/loongarch/include/asm/uaccess.h
> >> @@ -229,13 +229,13 @@ extern unsigned long __copy_user(void *to, const void *from, __kernel_size_t n);
> >>   static inline unsigned long __must_check
> >>   raw_copy_from_user(void *to, const void __user *from, unsigned long n)
> >>   {
> >> -       return __copy_user(to, from, n);
> >> +       return __copy_user(to, (__force const void *)from, n);
> >>   }
> >>
> >>   static inline unsigned long __must_check
> >>   raw_copy_to_user(void __user *to, const void *from, unsigned long n)
> >>   {
> >> -       return __copy_user(to, from, n);
> >> +       return __copy_user((__force void *)to, from, n);
> > Why this? Does it have something to do with stacktrace?
> >
> > Huacai
>
> Hi, huacai
>
> This is kernel test robot report sparse warnings:
> I reproduced locally and found that other architectures calling
> __copy_user also use __force conversion, Is this modification appropriate?
>
> kernel/trace/trace_events_user.c: note: in included file (through
> include/linux/uaccess.h, include/linux/sched/task.h,
> include/linux/sched/signal.h, ...):
>     arch/loongarch/include/asm/uaccess.h:232:32: sparse: sparse:
> incorrect type in argument 2 (different address spaces) @@     expected
> void const *from @@     got void const [noderef] __user *from @@
>     arch/loongarch/include/asm/uaccess.h:232:32: sparse:     expected
> void const *from
>     arch/loongarch/include/asm/uaccess.h:232:32: sparse:     got void
> const [noderef] __user *from
The modification might be correct, but should it be in this patch?

Huacai
>
> Thanks,
> -Qing
>
>
>
Re: [PATCH 3/4] LoongArch: Add stacktrace support
Posted by Qing Zhang 3 years, 8 months ago 

On 2022/8/2 上午9:30, Huacai Chen wrote:
> Hi, Qing,
> 
> On Tue, Aug 2, 2022 at 9:20 AM zhangqing <zhangqing@loongson.cn> wrote:
>>
>>
>>
>> On 2022/8/1 下午11:30, Huacai Chen wrote:
>>> Hi, Qing,
>>>
>>> On Mon, Aug 1, 2022 at 8:17 PM Qing Zhang <zhangqing@loongson.cn> wrote:
>>>>
>>>> Use common arch_stack_walk infrastructure to avoid duplicated code and
>>>> avoid taking care of the stack storage and filtering.
>>>> Add sra (means __schedule return address) and scfa (means __schedule call
>>>> frame address) to thread_info and store it in switch_to().
>>>>
>>>> Now we can print the process stack by cat /proc/*/stack and can better
>>>> support ftrace.
>>>>
>>>> Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
>>>> ---
>>>>    arch/loongarch/Kconfig                 |  5 ++++
>>>>    arch/loongarch/include/asm/processor.h |  9 +++++++
>>>>    arch/loongarch/include/asm/switch_to.h | 14 ++++++----
>>>>    arch/loongarch/include/asm/uaccess.h   |  4 +--
>>>>    arch/loongarch/kernel/Makefile         |  1 +
>>>>    arch/loongarch/kernel/asm-offsets.c    |  2 ++
>>>>    arch/loongarch/kernel/process.c        |  3 +++
>>>>    arch/loongarch/kernel/stacktrace.c     | 37 ++++++++++++++++++++++++++
>>>>    arch/loongarch/kernel/switch.S         |  2 ++
>>>>    9 files changed, 70 insertions(+), 7 deletions(-)
>>>>    create mode 100644 arch/loongarch/kernel/stacktrace.c
>>>>
>>>> diff --git a/arch/loongarch/include/asm/uaccess.h b/arch/loongarch/include/asm/uaccess.h
>>>> index 2b44edc604a2..a8ae2af4025a 100644
>>>> --- a/arch/loongarch/include/asm/uaccess.h
>>>> +++ b/arch/loongarch/include/asm/uaccess.h
>>>> @@ -229,13 +229,13 @@ extern unsigned long __copy_user(void *to, const void *from, __kernel_size_t n);
>>>>    static inline unsigned long __must_check
>>>>    raw_copy_from_user(void *to, const void __user *from, unsigned long n)
>>>>    {
>>>> -       return __copy_user(to, from, n);
>>>> +       return __copy_user(to, (__force const void *)from, n);
>>>>    }
>>>>
>>>>    static inline unsigned long __must_check
>>>>    raw_copy_to_user(void __user *to, const void *from, unsigned long n)
>>>>    {
>>>> -       return __copy_user(to, from, n);
>>>> +       return __copy_user((__force void *)to, from, n);
>>> Why this? Does it have something to do with stacktrace?
>>>
>>> Huacai
>>
>> Hi, huacai
>>
>> This is kernel test robot report sparse warnings:
>> I reproduced locally and found that other architectures calling
>> __copy_user also use __force conversion, Is this modification appropriate?
>>
>> kernel/trace/trace_events_user.c: note: in included file (through
>> include/linux/uaccess.h, include/linux/sched/task.h,
>> include/linux/sched/signal.h, ...):
>>      arch/loongarch/include/asm/uaccess.h:232:32: sparse: sparse:
>> incorrect type in argument 2 (different address spaces) @@     expected
>> void const *from @@     got void const [noderef] __user *from @@
>>      arch/loongarch/include/asm/uaccess.h:232:32: sparse:     expected
>> void const *from
>>      arch/loongarch/include/asm/uaccess.h:232:32: sparse:     got void
>> const [noderef] __user *from
> The modification might be correct, but should it be in this patch?
> 
> Huacai
I will send this patch separately,  it has nothing to do with the series 
patch.

arch/loongarch/kernel/ptrace.c: note: in included file (through 
include/linux/uaccess.h, include/linux/sched/task.h, 
include/linux/sched/signal.h, include/linux/ptrace.h, include/linux/audit.h)

-Qing
>>
>> Thanks,
>> -Qing
>>
>>
>>

Patchew 2.1-devel-ea86937

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