[v1] mm/memblock: discard .text/.data if CONFIG_ARCH_KEEP_MEMBLOCK not set

[PATCH] mm/memblock: discard .text/.data if CONFIG_ARCH_KEEP_MEMBLOCK not set

Posted by Wei Yang 1 year, 7 months ago

When CONFIG_ARCH_KEEP_MEMBLOCK not set, we expect to discard related
code and data. But it doesn't until CONFIG_MEMORY_HOTPLUG not set
neither.

This patch puts memblock's .text/.data into its own section, so that it
only depends on CONFIG_ARCH_KEEP_MEMBLOCK to discard related code and
data. After this, init size increase from 2420K to 2432K.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
---
 include/asm-generic/vmlinux.lds.h | 14 +++++++++++++-
 include/linux/memblock.h          |  8 ++++----
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index f7749d0f2562..775c5eedb9e6 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -147,6 +147,14 @@
 #define MEM_DISCARD(sec) *(.mem##sec)
 #endif
 
+#if defined(CONFIG_ARCH_KEEP_MEMBLOCK)
+#define MEMBLOCK_KEEP(sec)    *(.mb##sec)
+#define MEMBLOCK_DISCARD(sec)
+#else
+#define MEMBLOCK_KEEP(sec)
+#define MEMBLOCK_DISCARD(sec) *(.mb##sec)
+#endif
+
 #ifndef CONFIG_HAVE_DYNAMIC_FTRACE_NO_PATCHABLE
 #define KEEP_PATCHABLE		KEEP(*(__patchable_function_entries))
 #define PATCHABLE_DISCARDS
@@ -356,6 +364,7 @@
 	*(.ref.data)							\
 	*(.data..shared_aligned) /* percpu related */			\
 	MEM_KEEP(init.data*)						\
+	MEMBLOCK_KEEP(init.data*)					\
 	*(.data.unlikely)						\
 	__start_once = .;						\
 	*(.data.once)							\
@@ -573,6 +582,7 @@
 		*(.ref.text)						\
 		*(.text.asan.* .text.tsan.*)				\
 	MEM_KEEP(init.text*)						\
+	MEMBLOCK_KEEP(init.text*)					\
 
 
 /* sched.text is aling to function alignment to secure we have same
@@ -680,6 +690,7 @@
 	KEEP(*(SORT(___kentry+*)))					\
 	*(.init.data .init.data.*)					\
 	MEM_DISCARD(init.data*)						\
+	MEMBLOCK_DISCARD(init.data*)					\
 	KERNEL_CTORS()							\
 	MCOUNT_REC()							\
 	*(.init.rodata .init.rodata.*)					\
@@ -706,7 +717,8 @@
 #define INIT_TEXT							\
 	*(.init.text .init.text.*)					\
 	*(.text.startup)						\
-	MEM_DISCARD(init.text*)
+	MEM_DISCARD(init.text*)						\
+	MEMBLOCK_DISCARD(init.text*)
 
 #define EXIT_DATA							\
 	*(.exit.data .exit.data.*)					\
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index e2082240586d..3e1f1d42dde7 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -100,13 +100,13 @@ struct memblock {
 
 extern struct memblock memblock;
 
+#define __init_memblock        __section(".mbinit.text") __cold notrace \
+						  __latent_entropy
+#define __initdata_memblock    __section(".mbinit.data")
+
 #ifndef CONFIG_ARCH_KEEP_MEMBLOCK
-#define __init_memblock __meminit
-#define __initdata_memblock __meminitdata
 void memblock_discard(void);
 #else
-#define __init_memblock
-#define __initdata_memblock
 static inline void memblock_discard(void) {}
 #endif
 
-- 
2.34.1

Re: [PATCH] mm/memblock: discard .text/.data if CONFIG_ARCH_KEEP_MEMBLOCK not set

Posted by kernel test robot 1 year, 7 months ago

Hi Wei,

kernel test robot noticed the following build warnings:

[auto build test WARNING on akpm-mm/mm-everything]

url:    https://github.com/intel-lab-lkp/linux/commits/Wei-Yang/mm-memblock-discard-text-data-if-CONFIG_ARCH_KEEP_MEMBLOCK-not-set/20240506-092345
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20240506012104.10864-1-richard.weiyang%40gmail.com
patch subject: [PATCH] mm/memblock: discard .text/.data if CONFIG_ARCH_KEEP_MEMBLOCK not set
config: powerpc-allnoconfig
compiler: powerpc-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build):

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405071200.YgYuuCBu-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> powerpc-linux-ld: warning: orphan section `.mbinit.text' from `mm/memblock.o' being placed in section `.mbinit.text'
>> powerpc-linux-ld: warning: orphan section `.mbinit.text' from `mm/memblock.o' being placed in section `.mbinit.text'
>> powerpc-linux-ld: warning: orphan section `.mbinit.text' from `mm/memblock.o' being placed in section `.mbinit.text'

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
        git fetch akpm-mm mm-everything
        git checkout akpm-mm/mm-everything
        b4 shazam https://lore.kernel.org/r/20240506012104.10864-1-richard.weiyang@gmail.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash
#
# Automatically generated file; DO NOT EDIT.
# Linux/powerpc 6.9.0-rc4 Kernel Configuration
#
CONFIG_CC_VERSION_TEXT="powerpc-linux-gcc (GCC) 13.2.0"
CONFIG_CC_IS_GCC=y
CONFIG_GCC_VERSION=130200
CONFIG_CLANG_VERSION=0
CONFIG_AS_IS_GNU=y
CONFIG_AS_VERSION=24100
CONFIG_LD_IS_BFD=y
CONFIG_LD_VERSION=24100
CONFIG_LLD_VERSION=0
CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
CONFIG_GCC_ASM_GOTO_OUTPUT_WORKAROUND=y
CONFIG_CC_HAS_ASM_INLINE=y
CONFIG_CC_HAS_NO_PROFILE_FN_ATTR=y
CONFIG_PAHOLE_VERSION=126
CONFIG_IRQ_WORK=y
CONFIG_BUILDTIME_TABLE_SORT=y
CONFIG_THREAD_INFO_IN_TASK=y

#
# General setup
#
CONFIG_BROKEN_ON_SMP=y
CONFIG_INIT_ENV_ARG_LIMIT=32
# CONFIG_COMPILE_TEST is not set
# CONFIG_WERROR is not set
CONFIG_LOCALVERSION=""
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_BUILD_SALT=""
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_KERNEL_GZIP=y
# CONFIG_KERNEL_XZ is not set
CONFIG_DEFAULT_INIT=""
CONFIG_DEFAULT_HOSTNAME="(none)"
# CONFIG_SYSVIPC is not set
# CONFIG_WATCH_QUEUE is not set
# CONFIG_CROSS_MEMORY_ATTACH is not set
# CONFIG_USELIB is not set
CONFIG_HAVE_ARCH_AUDITSYSCALL=y

#
# IRQ subsystem
#
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_IRQ_SHOW_LEVEL=y
CONFIG_IRQ_DOMAIN=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y
# end of IRQ subsystem

CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CMOS_UPDATE=y

#
# Timers subsystem
#
CONFIG_HZ_PERIODIC=y
# CONFIG_NO_HZ_IDLE is not set
# CONFIG_NO_HZ is not set
# CONFIG_HIGH_RES_TIMERS is not set
# end of Timers subsystem

CONFIG_HAVE_EBPF_JIT=y
CONFIG_ARCH_WANT_DEFAULT_BPF_JIT=y

#
# BPF subsystem
#
# CONFIG_BPF_SYSCALL is not set
# end of BPF subsystem

CONFIG_PREEMPT_NONE_BUILD=y
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set

#
# CPU/Task time and stats accounting
#
CONFIG_TICK_CPU_ACCOUNTING=y
# CONFIG_VIRT_CPU_ACCOUNTING_NATIVE is not set
# CONFIG_VIRT_CPU_ACCOUNTING_GEN is not set
# CONFIG_IRQ_TIME_ACCOUNTING is not set
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_PSI is not set
# end of CPU/Task time and stats accounting

#
# RCU Subsystem
#
CONFIG_TINY_RCU=y
# CONFIG_RCU_EXPERT is not set
CONFIG_TINY_SRCU=y
# end of RCU Subsystem

# CONFIG_IKCONFIG is not set
# CONFIG_IKHEADERS is not set
CONFIG_LOG_BUF_SHIFT=17

#
# Scheduler features
#
# end of Scheduler features

CONFIG_CC_IMPLICIT_FALLTHROUGH="-Wimplicit-fallthrough=5"
CONFIG_GCC10_NO_ARRAY_BOUNDS=y
CONFIG_CC_NO_ARRAY_BOUNDS=y
CONFIG_GCC_NO_STRINGOP_OVERFLOW=y
CONFIG_CC_NO_STRINGOP_OVERFLOW=y
# CONFIG_CGROUPS is not set
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_TIME_NS is not set
# CONFIG_USER_NS is not set
# CONFIG_PID_NS is not set
# CONFIG_CHECKPOINT_RESTORE is not set
# CONFIG_SCHED_AUTOGROUP is not set
# CONFIG_RELAY is not set
# CONFIG_BLK_DEV_INITRD is not set
# CONFIG_BOOT_CONFIG is not set
# CONFIG_INITRAMFS_PRESERVE_MTIME is not set
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_HAVE_LD_DEAD_CODE_DATA_ELIMINATION=y
CONFIG_LD_ORPHAN_WARN=y
CONFIG_LD_ORPHAN_WARN_LEVEL="warn"
CONFIG_SYSCTL=y
CONFIG_SYSCTL_EXCEPTION_TRACE=y
# CONFIG_EXPERT is not set
CONFIG_MULTIUSER=y
CONFIG_SGETMASK_SYSCALL=y
CONFIG_SYSFS_SYSCALL=y
CONFIG_FHANDLE=y
CONFIG_POSIX_TIMERS=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_FUTEX_PI=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
CONFIG_IO_URING=y
CONFIG_ADVISE_SYSCALLS=y
CONFIG_MEMBARRIER=y
CONFIG_RSEQ=y
CONFIG_CACHESTAT_SYSCALL=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_SELFTEST is not set
CONFIG_KALLSYMS_BASE_RELATIVE=y
CONFIG_ARCH_HAS_MEMBARRIER_CALLBACKS=y
CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
CONFIG_HAVE_PERF_EVENTS=y

#
# Kernel Performance Events And Counters
#
# CONFIG_PERF_EVENTS is not set
# end of Kernel Performance Events And Counters

# CONFIG_PROFILING is not set

#
# Kexec and crash features
#
# CONFIG_KEXEC is not set
# end of Kexec and crash features
# end of General setup

CONFIG_PPC32=y
# CONFIG_PPC64 is not set

#
# Processor support
#
CONFIG_PPC_BOOK3S_32=y
# CONFIG_PPC_85xx is not set
# CONFIG_PPC_8xx is not set
# CONFIG_40x is not set
# CONFIG_44x is not set
# CONFIG_PPC_BOOK3S_603 is not set
CONFIG_PPC_BOOK3S_604=y
CONFIG_POWERPC_CPU=y
# CONFIG_E300C2_CPU is not set
# CONFIG_E300C3_CPU is not set
# CONFIG_G4_CPU is not set
# CONFIG_TOOLCHAIN_DEFAULT_CPU is not set
CONFIG_TARGET_CPU_BOOL=y
CONFIG_TARGET_CPU="powerpc"
CONFIG_PPC_BOOK3S=y
CONFIG_PPC_FPU_REGS=y
CONFIG_PPC_FPU=y
# CONFIG_ALTIVEC is not set
# CONFIG_PPC_KUEP is not set
# CONFIG_PPC_KUAP is not set
CONFIG_PPC_HAVE_PMU_SUPPORT=y
# CONFIG_PMU_SYSFS is not set
# CONFIG_SMP is not set
CONFIG_NR_CPUS=1
# end of Processor support

CONFIG_VDSO32=y
CONFIG_CPU_BIG_ENDIAN=y
CONFIG_32BIT=y
CONFIG_MMU=y
CONFIG_ARCH_MMAP_RND_BITS_MAX=17
CONFIG_ARCH_MMAP_RND_BITS_MIN=11
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=17
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MIN=11
CONFIG_NR_IRQS=512
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_PPC=y
CONFIG_EARLY_PRINTK=y
CONFIG_PANIC_TIMEOUT=180
CONFIG_SCHED_OMIT_FRAME_POINTER=y
CONFIG_AUDIT_ARCH=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_HAS_ADD_PAGES=y
# CONFIG_PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT is not set
CONFIG_ARCH_SUPPORTS_UPROBES=y
CONFIG_PGTABLE_LEVELS=2

#
# Platform support
#
# CONFIG_PPC_CHRP is not set
# CONFIG_PPC_MPC512x is not set
# CONFIG_PPC_MPC52xx is not set
# CONFIG_PPC_PMAC is not set
# CONFIG_PPC_82xx is not set
# CONFIG_PPC_83xx is not set
# CONFIG_PPC_86xx is not set
# CONFIG_EMBEDDED6xx is not set
# CONFIG_AMIGAONE is not set
# CONFIG_KVM_GUEST is not set
# CONFIG_EPAPR_PARAVIRT is not set
# CONFIG_PPC_OF_BOOT_TRAMPOLINE is not set

#
# CPU Frequency scaling
#
# CONFIG_CPU_FREQ is not set
# end of CPU Frequency scaling

#
# CPUIdle driver
#

#
# CPU Idle
#
# CONFIG_CPU_IDLE is not set
# end of CPU Idle
# end of CPUIdle driver

# CONFIG_TAU is not set
# CONFIG_GEN_RTC is not set
# end of Platform support

#
# Kernel options
#
# CONFIG_HIGHMEM is not set
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
CONFIG_ARCH_SUPPORTS_KEXEC=y
CONFIG_ARCH_SUPPORTS_KEXEC_PURGATORY=y
CONFIG_ARCH_SUPPORTS_CRASH_DUMP=y
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ILLEGAL_POINTER_VALUE=0
CONFIG_PPC_4K_PAGES=y
CONFIG_THREAD_SHIFT=13
CONFIG_DATA_SHIFT=12
CONFIG_ARCH_FORCE_MAX_ORDER=10
CONFIG_CMDLINE=""
CONFIG_EXTRA_TARGETS=""
# CONFIG_PM is not set
# end of Kernel options

#
# Bus options
#
# CONFIG_FSL_LBC is not set
# end of Bus options

#
# Advanced setup
#
# CONFIG_ADVANCED_OPTIONS is not set

#
# Default settings for advanced configuration options are used
#
CONFIG_LOWMEM_SIZE=0x30000000
CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xb0000000
# end of Advanced setup

# CONFIG_VIRTUALIZATION is not set
CONFIG_HAVE_LIVEPATCH=y

#
# General architecture-dependent options
#
CONFIG_SMT_NUM_THREADS_DYNAMIC=y
# CONFIG_JUMP_LABEL is not set
# CONFIG_STATIC_CALL_SELFTEST is not set
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_ARCH_USE_BUILTIN_BSWAP=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_KPROBES_ON_FTRACE=y
CONFIG_HAVE_FUNCTION_ERROR_INJECTION=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_GENERIC_SMP_IDLE_THREAD=y
CONFIG_GENERIC_IDLE_POLL_SETUP=y
CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
CONFIG_ARCH_HAS_SET_MEMORY=y
CONFIG_ARCH_32BIT_OFF_T=y
CONFIG_HAVE_ASM_MODVERSIONS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_RSEQ=y
CONFIG_HAVE_FUNCTION_ARG_ACCESS_API=y
CONFIG_HAVE_PERF_REGS=y
CONFIG_HAVE_PERF_USER_STACK_DUMP=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_HAVE_ARCH_JUMP_LABEL_RELATIVE=y
CONFIG_MMU_GATHER_TABLE_FREE=y
CONFIG_MMU_GATHER_RCU_TABLE_FREE=y
CONFIG_MMU_GATHER_PAGE_SIZE=y
CONFIG_MMU_GATHER_MERGE_VMAS=y
CONFIG_ARCH_WANT_IRQS_OFF_ACTIVATE_MM=y
CONFIG_MMU_LAZY_TLB_REFCOUNT=y
CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y
CONFIG_ARCH_WEAK_RELEASE_ACQUIRE=y
CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
CONFIG_HAVE_ARCH_SECCOMP=y
CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
# CONFIG_SECCOMP is not set
CONFIG_HAVE_STACKPROTECTOR=y
# CONFIG_STACKPROTECTOR is not set
CONFIG_LTO_NONE=y
CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES=y
CONFIG_HAVE_CONTEXT_TRACKING_USER=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
CONFIG_MODULES_USE_ELF_RELA=y
CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC=y
CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK=y
CONFIG_SOFTIRQ_ON_OWN_STACK=y
CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
CONFIG_ARCH_MMAP_RND_BITS=11
CONFIG_HAVE_PAGE_SIZE_4KB=y
CONFIG_PAGE_SIZE_4KB=y
CONFIG_PAGE_SIZE_LESS_THAN_64KB=y
CONFIG_PAGE_SIZE_LESS_THAN_256KB=y
CONFIG_PAGE_SHIFT=12
CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT=y
CONFIG_HAVE_OBJTOOL=y
CONFIG_HAVE_RELIABLE_STACKTRACE=y
CONFIG_HAVE_ARCH_NVRAM_OPS=y
CONFIG_CLONE_BACKWARDS=y
CONFIG_OLD_SIGSUSPEND=y
CONFIG_OLD_SIGACTION=y
# CONFIG_COMPAT_32BIT_TIME is not set
CONFIG_HAVE_ARCH_VMAP_STACK=y
# CONFIG_VMAP_STACK is not set
CONFIG_HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET=y
CONFIG_RANDOMIZE_KSTACK_OFFSET=y
# CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT is not set
CONFIG_ARCH_OPTIONAL_KERNEL_RWX=y
CONFIG_ARCH_OPTIONAL_KERNEL_RWX_DEFAULT=y
CONFIG_ARCH_HAS_STRICT_KERNEL_RWX=y
# CONFIG_STRICT_KERNEL_RWX is not set
CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y
CONFIG_ARCH_HAS_PHYS_TO_DMA=y
CONFIG_HAVE_STATIC_CALL=y
CONFIG_ARCH_WANT_LD_ORPHAN_WARN=y
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_ARCH_SPLIT_ARG64=y
CONFIG_ARCH_HAS_KERNEL_FPU_SUPPORT=y

#
# GCOV-based kernel profiling
#
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
# end of GCOV-based kernel profiling

CONFIG_HAVE_GCC_PLUGINS=y
# CONFIG_GCC_PLUGINS is not set
CONFIG_FUNCTION_ALIGNMENT_4B=y
CONFIG_FUNCTION_ALIGNMENT=4
# end of General architecture-dependent options

CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
# CONFIG_MODULES is not set
CONFIG_BLOCK=y
# CONFIG_BLOCK_LEGACY_AUTOLOAD is not set
# CONFIG_BLK_DEV_BSGLIB is not set
# CONFIG_BLK_DEV_INTEGRITY is not set
# CONFIG_BLK_DEV_WRITE_MOUNTED is not set
# CONFIG_BLK_DEV_ZONED is not set
# CONFIG_BLK_WBT is not set
# CONFIG_BLK_INLINE_ENCRYPTION is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_EFI_PARTITION=y
# end of Partition Types

#
# IO Schedulers
#
# CONFIG_MQ_IOSCHED_DEADLINE is not set
# CONFIG_MQ_IOSCHED_KYBER is not set
# CONFIG_IOSCHED_BFQ is not set
# end of IO Schedulers

CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y
CONFIG_INLINE_WRITE_UNLOCK=y
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y
CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y

#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
CONFIG_ELFCORE=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
# CONFIG_BINFMT_SCRIPT is not set
# CONFIG_BINFMT_MISC is not set
CONFIG_COREDUMP=y
# end of Executable file formats

#
# Memory Management options
#
# CONFIG_SWAP is not set

#
# Slab allocator options
#
CONFIG_SLUB=y
# CONFIG_SLAB_MERGE_DEFAULT is not set
# CONFIG_SLAB_FREELIST_RANDOM is not set
# CONFIG_SLAB_FREELIST_HARDENED is not set
# CONFIG_SLUB_STATS is not set
# CONFIG_RANDOM_KMALLOC_CACHES is not set
# end of Slab allocator options

# CONFIG_SHUFFLE_PAGE_ALLOCATOR is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_FLATMEM=y
CONFIG_HAVE_GUP_FAST=y
CONFIG_ARCH_KEEP_MEMBLOCK=y
CONFIG_EXCLUSIVE_SYSTEM_RAM=y
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_COMPACTION is not set
# CONFIG_PAGE_REPORTING is not set
# CONFIG_MIGRATION is not set
CONFIG_PCP_BATCH_SCALE_MAX=5
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_NEED_PER_CPU_KM=y
# CONFIG_CMA is not set
CONFIG_GENERIC_EARLY_IOREMAP=y
# CONFIG_IDLE_PAGE_TRACKING is not set
CONFIG_ARCH_HAS_CURRENT_STACK_POINTER=y
CONFIG_VM_EVENT_COUNTERS=y
# CONFIG_PERCPU_STATS is not set

#
# GUP_TEST needs to have DEBUG_FS enabled
#
# CONFIG_DMAPOOL_TEST is not set
CONFIG_ARCH_HAS_PTE_SPECIAL=y
# CONFIG_ANON_VMA_NAME is not set
# CONFIG_USERFAULTFD is not set
# CONFIG_LRU_GEN is not set
CONFIG_LOCK_MM_AND_FIND_VMA=y

#
# Data Access Monitoring
#
# CONFIG_DAMON is not set
# end of Data Access Monitoring
# end of Memory Management options

# CONFIG_NET is not set

#
# Device Drivers
#
# CONFIG_PCCARD is not set

#
# Generic Driver Options
#
# CONFIG_UEVENT_HELPER is not set
# CONFIG_DEVTMPFS is not set
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set

#
# Firmware loader
#
CONFIG_FW_LOADER=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_FW_LOADER_USER_HELPER is not set
# CONFIG_FW_LOADER_COMPRESS is not set
# CONFIG_FW_UPLOAD is not set
# end of Firmware loader

CONFIG_ALLOW_DEV_COREDUMP=y
CONFIG_GENERIC_CPU_AUTOPROBE=y
# CONFIG_FW_DEVLINK_SYNC_STATE_TIMEOUT is not set
# end of Generic Driver Options

#
# Bus devices
#
# CONFIG_MHI_BUS is not set
# CONFIG_MHI_BUS_EP is not set
# end of Bus devices

#
# Cache Drivers
#
# end of Cache Drivers

#
# Firmware Drivers
#

#
# ARM System Control and Management Interface Protocol
#
# end of ARM System Control and Management Interface Protocol

# CONFIG_GOOGLE_FIRMWARE is not set

#
# Qualcomm firmware drivers
#
# end of Qualcomm firmware drivers

#
# Tegra firmware driver
#
# end of Tegra firmware driver
# end of Firmware Drivers

# CONFIG_GNSS is not set
# CONFIG_MTD is not set
CONFIG_DTC=y
CONFIG_OF=y
# CONFIG_OF_UNITTEST is not set
CONFIG_OF_FLATTREE=y
CONFIG_OF_EARLY_FLATTREE=y
CONFIG_OF_KOBJ=y
CONFIG_OF_ADDRESS=y
CONFIG_OF_IRQ=y
CONFIG_OF_RESERVED_MEM=y
# CONFIG_OF_OVERLAY is not set
CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
# CONFIG_PARPORT is not set
# CONFIG_BLK_DEV is not set

#
# NVME Support
#
# CONFIG_NVME_FC is not set
# end of NVME Support

#
# Misc devices
#
# CONFIG_DUMMY_IRQ is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_SRAM is not set
# CONFIG_XILINX_SDFEC is not set
# CONFIG_OPEN_DICE is not set
# CONFIG_VCPU_STALL_DETECTOR is not set
# CONFIG_C2PORT is not set

#
# EEPROM support
#
# CONFIG_EEPROM_93CX6 is not set
# end of EEPROM support

#
# Texas Instruments shared transport line discipline
#
# end of Texas Instruments shared transport line discipline

#
# Altera FPGA firmware download module (requires I2C)
#
# CONFIG_ECHO is not set
# CONFIG_PVPANIC is not set
# end of Misc devices

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
# CONFIG_SCSI is not set
# end of SCSI device support

# CONFIG_ATA is not set
# CONFIG_MD is not set
# CONFIG_TARGET_CORE is not set
# CONFIG_MACINTOSH_DRIVERS is not set

#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_INPUT_SPARSEKMAP is not set
# CONFIG_INPUT_MATRIXKMAP is not set

#
# Userland interfaces
#
# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_EVDEV is not set
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set
# CONFIG_RMI4_CORE is not set

#
# Hardware I/O ports
#
# CONFIG_SERIO is not set
CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y
# CONFIG_GAMEPORT is not set
# end of Hardware I/O ports
# end of Input device support

#
# Character devices
#
CONFIG_TTY=y
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_LEGACY_TIOCSTI is not set
# CONFIG_LDISC_AUTOLOAD is not set

#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_UARTLITE is not set
# CONFIG_SERIAL_SIFIVE is not set
# CONFIG_SERIAL_SCCNXP is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_XILINX_PS_UART is not set
# CONFIG_SERIAL_ARC is not set
# CONFIG_SERIAL_FSL_LPUART is not set
# CONFIG_SERIAL_FSL_LINFLEXUART is not set
# CONFIG_SERIAL_CONEXANT_DIGICOLOR is not set
# end of Serial drivers

# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_PPC_EPAPR_HV_BYTECHAN is not set
# CONFIG_NULL_TTY is not set
# CONFIG_HVC_UDBG is not set
# CONFIG_SERIAL_DEV_BUS is not set
# CONFIG_VIRTIO_CONSOLE is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_DEVMEM is not set
# CONFIG_NVRAM is not set
# CONFIG_TCG_TPM is not set
# CONFIG_XILLYBUS is not set
# end of Character devices

#
# I2C support
#
# CONFIG_I2C is not set
# end of I2C support

# CONFIG_I3C is not set
# CONFIG_SPI is not set
# CONFIG_SPMI is not set
# CONFIG_HSI is not set
# CONFIG_PPS is not set

#
# PTP clock support
#
CONFIG_PTP_1588_CLOCK_OPTIONAL=y

#
# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
#
# end of PTP clock support

# CONFIG_PINCTRL is not set
# CONFIG_GPIOLIB is not set
# CONFIG_W1 is not set
# CONFIG_POWER_RESET is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
# CONFIG_THERMAL is not set
# CONFIG_WATCHDOG is not set
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y
# CONFIG_BCMA is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_ATMEL_FLEXCOM is not set
# CONFIG_MFD_ATMEL_HLCDC is not set
# CONFIG_MFD_MADERA is not set
# CONFIG_MFD_HI6421_PMIC is not set
# CONFIG_MFD_KEMPLD is not set
# CONFIG_MFD_MT6397 is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_MFD_SYSCON is not set
# CONFIG_MFD_TQMX86 is not set
# end of Multifunction device drivers

# CONFIG_REGULATOR is not set
# CONFIG_RC_CORE is not set

#
# CEC support
#
# CONFIG_MEDIA_CEC_SUPPORT is not set
# end of CEC support

# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
# CONFIG_AUXDISPLAY is not set
# CONFIG_DRM is not set

#
# Frame buffer Devices
#
# CONFIG_FB is not set
# end of Frame buffer Devices

#
# Backlight & LCD device support
#
# CONFIG_LCD_CLASS_DEVICE is not set
# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
# end of Backlight & LCD device support

#
# Console display driver support
#
CONFIG_DUMMY_CONSOLE=y
CONFIG_DUMMY_CONSOLE_COLUMNS=80
CONFIG_DUMMY_CONSOLE_ROWS=25
# end of Console display driver support
# end of Graphics support

# CONFIG_SOUND is not set
# CONFIG_HID_SUPPORT is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
# CONFIG_USB_SUPPORT is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_ACCESSIBILITY is not set
CONFIG_EDAC_ATOMIC_SCRUB=y
CONFIG_EDAC_SUPPORT=y
CONFIG_RTC_LIB=y
# CONFIG_RTC_CLASS is not set
# CONFIG_DMADEVICES is not set

#
# DMABUF options
#
# CONFIG_SYNC_FILE is not set
# CONFIG_DMABUF_HEAPS is not set
# end of DMABUF options

# CONFIG_UIO is not set
# CONFIG_VFIO is not set
# CONFIG_VIRT_DRIVERS is not set
# CONFIG_VIRTIO_MENU is not set
# CONFIG_VHOST_MENU is not set

#
# Microsoft Hyper-V guest support
#
# end of Microsoft Hyper-V guest support

# CONFIG_GREYBUS is not set
# CONFIG_COMEDI is not set
# CONFIG_STAGING is not set
# CONFIG_GOLDFISH is not set
# CONFIG_COMMON_CLK is not set
# CONFIG_HWSPINLOCK is not set

#
# Clock Source drivers
#
# end of Clock Source drivers

# CONFIG_MAILBOX is not set
# CONFIG_IOMMU_SUPPORT is not set

#
# Remoteproc drivers
#
# CONFIG_REMOTEPROC is not set
# end of Remoteproc drivers

#
# Rpmsg drivers
#
# CONFIG_RPMSG_VIRTIO is not set
# end of Rpmsg drivers

# CONFIG_SOUNDWIRE is not set

#
# SOC (System On Chip) specific Drivers
#

#
# Amlogic SoC drivers
#
# end of Amlogic SoC drivers

#
# Broadcom SoC drivers
#
# end of Broadcom SoC drivers

#
# NXP/Freescale QorIQ SoC drivers
#
# CONFIG_QUICC_ENGINE is not set
# end of NXP/Freescale QorIQ SoC drivers

#
# fujitsu SoC drivers
#
# end of fujitsu SoC drivers

#
# i.MX SoC drivers
#
# end of i.MX SoC drivers

#
# Enable LiteX SoC Builder specific drivers
#
# CONFIG_LITEX_SOC_CONTROLLER is not set
# end of Enable LiteX SoC Builder specific drivers

# CONFIG_WPCM450_SOC is not set

#
# Qualcomm SoC drivers
#
# end of Qualcomm SoC drivers

# CONFIG_SOC_TI is not set

#
# Xilinx SoC drivers
#
# end of Xilinx SoC drivers
# end of SOC (System On Chip) specific Drivers

#
# PM Domains
#

#
# Amlogic PM Domains
#
# end of Amlogic PM Domains

#
# Broadcom PM Domains
#
# end of Broadcom PM Domains

#
# i.MX PM Domains
#
# end of i.MX PM Domains

#
# Qualcomm PM Domains
#
# end of Qualcomm PM Domains
# end of PM Domains

# CONFIG_PM_DEVFREQ is not set
# CONFIG_EXTCON is not set
# CONFIG_MEMORY is not set
# CONFIG_IIO is not set
# CONFIG_PWM is not set

#
# IRQ chip support
#
CONFIG_IRQCHIP=y
# CONFIG_AL_FIC is not set
# CONFIG_XILINX_INTC is not set
# end of IRQ chip support

# CONFIG_IPACK_BUS is not set
# CONFIG_RESET_CONTROLLER is not set

#
# PHY Subsystem
#
# CONFIG_GENERIC_PHY is not set
# CONFIG_PHY_CAN_TRANSCEIVER is not set

#
# PHY drivers for Broadcom platforms
#
# CONFIG_BCM_KONA_USB2_PHY is not set
# end of PHY drivers for Broadcom platforms

# CONFIG_PHY_CADENCE_DPHY is not set
# CONFIG_PHY_CADENCE_DPHY_RX is not set
# CONFIG_PHY_CADENCE_SALVO is not set
# CONFIG_PHY_PXA_28NM_HSIC is not set
# CONFIG_PHY_PXA_28NM_USB2 is not set
# end of PHY Subsystem

# CONFIG_POWERCAP is not set
# CONFIG_MCB is not set
# CONFIG_RAS is not set

#
# Android
#
# CONFIG_ANDROID_BINDER_IPC is not set
# end of Android

# CONFIG_DAX is not set
# CONFIG_NVMEM is not set

#
# HW tracing support
#
# CONFIG_STM is not set
# CONFIG_INTEL_TH is not set
# end of HW tracing support

# CONFIG_FPGA is not set
# CONFIG_FSI is not set
# CONFIG_SIOX is not set
# CONFIG_SLIMBUS is not set
# CONFIG_INTERCONNECT is not set
# CONFIG_COUNTER is not set
# CONFIG_PECI is not set
# CONFIG_HTE is not set
# end of Device Drivers

#
# File systems
#
# CONFIG_VALIDATE_FS_PARSER is not set
CONFIG_FS_IOMAP=y
# CONFIG_EXT2_FS is not set
# CONFIG_EXT3_FS is not set
# CONFIG_EXT4_FS is not set
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_BTRFS_FS is not set
# CONFIG_NILFS2_FS is not set
# CONFIG_F2FS_FS is not set
# CONFIG_BCACHEFS_FS is not set
CONFIG_EXPORTFS=y
# CONFIG_EXPORTFS_BLOCK_OPS is not set
CONFIG_FILE_LOCKING=y
# CONFIG_FS_ENCRYPTION is not set
# CONFIG_FS_VERITY is not set
# CONFIG_DNOTIFY is not set
# CONFIG_INOTIFY_USER is not set
# CONFIG_FANOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_FUSE_FS is not set
# CONFIG_OVERLAY_FS is not set

#
# Caches
#
# end of Caches

#
# CD-ROM/DVD Filesystems
#
# CONFIG_ISO9660_FS is not set
# CONFIG_UDF_FS is not set
# end of CD-ROM/DVD Filesystems

#
# DOS/FAT/EXFAT/NT Filesystems
#
# CONFIG_MSDOS_FS is not set
# CONFIG_VFAT_FS is not set
# CONFIG_EXFAT_FS is not set
# CONFIG_NTFS3_FS is not set
# end of DOS/FAT/EXFAT/NT Filesystems

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
# CONFIG_PROC_KCORE is not set
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
# CONFIG_PROC_CHILDREN is not set
CONFIG_KERNFS=y
CONFIG_SYSFS=y
# CONFIG_TMPFS is not set
# CONFIG_CONFIGFS_FS is not set
# end of Pseudo filesystems

# CONFIG_MISC_FILESYSTEMS is not set
# CONFIG_NLS is not set
# CONFIG_UNICODE is not set
CONFIG_IO_WQ=y
# end of File systems

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
# CONFIG_HARDENED_USERCOPY is not set
# CONFIG_FORTIFY_SOURCE is not set
# CONFIG_STATIC_USERMODEHELPER is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_LSM="landlock,lockdown,yama,loadpin,safesetid,bpf"

#
# Kernel hardening options
#

#
# Memory initialization
#
CONFIG_CC_HAS_AUTO_VAR_INIT_PATTERN=y
CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_BARE=y
CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO=y
# CONFIG_INIT_STACK_NONE is not set
# CONFIG_INIT_STACK_ALL_PATTERN is not set
CONFIG_INIT_STACK_ALL_ZERO=y
# CONFIG_INIT_ON_ALLOC_DEFAULT_ON is not set
# CONFIG_INIT_ON_FREE_DEFAULT_ON is not set
# CONFIG_INIT_MLOCKED_ON_FREE_DEFAULT_ON is not set
CONFIG_CC_HAS_ZERO_CALL_USED_REGS=y
# CONFIG_ZERO_CALL_USED_REGS is not set
# end of Memory initialization

#
# Hardening of kernel data structures
#
# CONFIG_LIST_HARDENED is not set
# CONFIG_BUG_ON_DATA_CORRUPTION is not set
# end of Hardening of kernel data structures

CONFIG_RANDSTRUCT_NONE=y
# end of Kernel hardening options
# end of Security options

# CONFIG_CRYPTO is not set

#
# Library routines
#
# CONFIG_PACKING is not set
CONFIG_BITREVERSE=y
CONFIG_GENERIC_STRNCPY_FROM_USER=y
CONFIG_GENERIC_STRNLEN_USER=y
# CONFIG_CORDIC is not set
# CONFIG_PRIME_NUMBERS is not set

#
# Crypto library routines
#
CONFIG_CRYPTO_LIB_BLAKE2S_GENERIC=y
# CONFIG_CRYPTO_LIB_CHACHA is not set
# CONFIG_CRYPTO_LIB_CURVE25519 is not set
CONFIG_CRYPTO_LIB_POLY1305_RSIZE=1
# CONFIG_CRYPTO_LIB_POLY1305 is not set
# end of Crypto library routines

# CONFIG_CRC_CCITT is not set
# CONFIG_CRC16 is not set
# CONFIG_CRC_T10DIF is not set
# CONFIG_CRC64_ROCKSOFT is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC32_SELFTEST is not set
CONFIG_CRC32_SLICEBY8=y
# CONFIG_CRC32_SLICEBY4 is not set
# CONFIG_CRC32_SARWATE is not set
# CONFIG_CRC32_BIT is not set
# CONFIG_CRC64 is not set
# CONFIG_CRC4 is not set
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
# CONFIG_CRC8 is not set
# CONFIG_RANDOM32_SELFTEST is not set
# CONFIG_XZ_DEC is not set
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT_MAP=y
CONFIG_HAS_DMA=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_DMA_DECLARE_COHERENT=y
CONFIG_ARCH_DMA_DEFAULT_COHERENT=y
# CONFIG_DMA_API_DEBUG is not set
CONFIG_GENERIC_ATOMIC64=y
# CONFIG_IRQ_POLL is not set
CONFIG_LIBFDT=y
CONFIG_HAVE_GENERIC_VDSO=y
CONFIG_GENERIC_GETTIMEOFDAY=y
CONFIG_GENERIC_VDSO_TIME_NS=y
CONFIG_ARCH_HAS_PMEM_API=y
CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE=y
CONFIG_ARCH_STACKWALK=y
CONFIG_STACKDEPOT=y
CONFIG_STACKDEPOT_MAX_FRAMES=64
CONFIG_SBITMAP=y
# CONFIG_LWQ_TEST is not set
# end of Library routines

CONFIG_GENERIC_IOREMAP=y

#
# Kernel hacking
#

#
# printk and dmesg options
#
# CONFIG_PRINTK_TIME is not set
# CONFIG_PRINTK_CALLER is not set
# CONFIG_STACKTRACE_BUILD_ID is not set
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
CONFIG_CONSOLE_LOGLEVEL_QUIET=4
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
# CONFIG_DYNAMIC_DEBUG is not set
# CONFIG_DYNAMIC_DEBUG_CORE is not set
# CONFIG_SYMBOLIC_ERRNAME is not set
CONFIG_DEBUG_BUGVERBOSE=y
# end of printk and dmesg options

# CONFIG_DEBUG_KERNEL is not set

#
# Compile-time checks and compiler options
#
CONFIG_AS_HAS_NON_CONST_ULEB128=y
CONFIG_FRAME_WARN=1024
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_HEADERS_INSTALL is not set
CONFIG_DEBUG_SECTION_MISMATCH=y
CONFIG_SECTION_MISMATCH_WARN_ONLY=y
# end of Compile-time checks and compiler options

#
# Generic Kernel Debugging Instruments
#
# CONFIG_MAGIC_SYSRQ is not set
# CONFIG_DEBUG_FS is not set
CONFIG_HAVE_ARCH_KGDB=y
CONFIG_ARCH_HAS_UBSAN=y
# CONFIG_UBSAN is not set
CONFIG_HAVE_ARCH_KCSAN=y
CONFIG_HAVE_KCSAN_COMPILER=y
# end of Generic Kernel Debugging Instruments

#
# Networking Debugging
#
# end of Networking Debugging

#
# Memory Debugging
#
# CONFIG_PAGE_EXTENSION is not set
CONFIG_SLUB_DEBUG=y
# CONFIG_SLUB_DEBUG_ON is not set
# CONFIG_PAGE_POISONING is not set
CONFIG_GENERIC_PTDUMP=y
CONFIG_HAVE_DEBUG_KMEMLEAK=y
CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE=y
# CONFIG_DEBUG_VM_PGTABLE is not set
CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
CONFIG_DEBUG_MEMORY_INIT=y
CONFIG_HAVE_DEBUG_STACKOVERFLOW=y
# CONFIG_MEM_ALLOC_PROFILING is not set
CONFIG_HAVE_ARCH_KASAN=y
CONFIG_HAVE_ARCH_KASAN_VMALLOC=y
CONFIG_CC_HAS_KASAN_GENERIC=y
CONFIG_CC_HAS_WORKING_NOSANITIZE_ADDRESS=y
# CONFIG_KASAN is not set
CONFIG_HAVE_ARCH_KFENCE=y
# CONFIG_KFENCE is not set
# end of Memory Debugging

#
# Debug Oops, Lockups and Hangs
#
# CONFIG_PANIC_ON_OOPS is not set
CONFIG_PANIC_ON_OOPS_VALUE=0
# end of Debug Oops, Lockups and Hangs

#
# Scheduler Debugging
#
# end of Scheduler Debugging

# CONFIG_DEBUG_TIMEKEEPING is not set

#
# Lock Debugging (spinlocks, mutexes, etc...)
#
CONFIG_LOCK_DEBUGGING_SUPPORT=y
# CONFIG_WW_MUTEX_SELFTEST is not set
# end of Lock Debugging (spinlocks, mutexes, etc...)

# CONFIG_DEBUG_IRQFLAGS is not set
CONFIG_STACKTRACE=y
# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set

#
# Debug kernel data structures
#
# end of Debug kernel data structures

#
# RCU Debugging
#
# end of RCU Debugging

CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_OBJTOOL_MCOUNT=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_TRACING_SUPPORT=y
# CONFIG_FTRACE is not set
# CONFIG_SAMPLES is not set
CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y

#
# powerpc Debugging
#
CONFIG_PPC_DISABLE_WERROR=y
CONFIG_PRINT_STACK_DEPTH=64
# CONFIG_BOOTX_TEXT is not set
# CONFIG_PPC_EARLY_DEBUG is not set
# end of powerpc Debugging

#
# Kernel Testing and Coverage
#
# CONFIG_KUNIT is not set
CONFIG_ARCH_HAS_KCOV=y
CONFIG_CC_HAS_SANCOV_TRACE_PC=y
# CONFIG_KCOV is not set
# CONFIG_RUNTIME_TESTING_MENU is not set
CONFIG_ARCH_USE_MEMTEST=y
# CONFIG_MEMTEST is not set
# end of Kernel Testing and Coverage

#
# Rust hacking
#
# end of Rust hacking
# end of Kernel hacking

Re: [PATCH] mm/memblock: discard .text/.data if CONFIG_ARCH_KEEP_MEMBLOCK not set

Posted by Wei Yang 1 year, 7 months ago

On Tue, May 07, 2024 at 01:13:05PM +0800, kernel test robot wrote:
>Hi Wei,
>
>kernel test robot noticed the following build warnings:
>
>[auto build test WARNING on akpm-mm/mm-everything]
>
>url:    https://github.com/intel-lab-lkp/linux/commits/Wei-Yang/mm-memblock-discard-text-data-if-CONFIG_ARCH_KEEP_MEMBLOCK-not-set/20240506-092345
>base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
>patch link:    https://lore.kernel.org/r/20240506012104.10864-1-richard.weiyang%40gmail.com
>patch subject: [PATCH] mm/memblock: discard .text/.data if CONFIG_ARCH_KEEP_MEMBLOCK not set
>config: powerpc-allnoconfig
>compiler: powerpc-linux-gcc (GCC) 13.2.0
>reproduce (this is a W=1 build):
>
>If you fix the issue in a separate patch/commit (i.e. not just a new version of
>the same patch/commit), kindly add following tags
>| Reported-by: kernel test robot <lkp@intel.com>
>| Closes: https://lore.kernel.org/oe-kbuild-all/202405071200.YgYuuCBu-lkp@intel.com/
>
>All warnings (new ones prefixed by >>):
>
>>> powerpc-linux-ld: warning: orphan section `.mbinit.text' from `mm/memblock.o' being placed in section `.mbinit.text'
>>> powerpc-linux-ld: warning: orphan section `.mbinit.text' from `mm/memblock.o' being placed in section `.mbinit.text'
>>> powerpc-linux-ld: warning: orphan section `.mbinit.text' from `mm/memblock.o' being placed in section `.mbinit.text'
>
>-- 
>0-DAY CI Kernel Test Service
>https://github.com/intel/lkp-tests/wiki

>reproduce (this is a W=1 build):
>        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
>        git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
>        git fetch akpm-mm mm-everything
>        git checkout akpm-mm/mm-everything
>        b4 shazam https://lore.kernel.org/r/20240506012104.10864-1-richard.weiyang@gmail.com
>        # save the config file
>        mkdir build_dir && cp config build_dir/.config
>        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
>        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash

Can I reproduce this on x86? I don't have a powerpc machine.

-- 
Wei Yang
Help you, Help me

Re: [PATCH] mm/memblock: discard .text/.data if CONFIG_ARCH_KEEP_MEMBLOCK not set

Posted by Yujie Liu 1 year, 7 months ago

On Tue, May 07, 2024 at 08:43:50AM +0000, Wei Yang wrote:
> On Tue, May 07, 2024 at 01:13:05PM +0800, kernel test robot wrote:
> >Hi Wei,
> >
> >kernel test robot noticed the following build warnings:
> >
> >[auto build test WARNING on akpm-mm/mm-everything]
> >
> >url:    https://github.com/intel-lab-lkp/linux/commits/Wei-Yang/mm-memblock-discard-text-data-if-CONFIG_ARCH_KEEP_MEMBLOCK-not-set/20240506-092345
> >base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> >patch link:    https://lore.kernel.org/r/20240506012104.10864-1-richard.weiyang%40gmail.com
> >patch subject: [PATCH] mm/memblock: discard .text/.data if CONFIG_ARCH_KEEP_MEMBLOCK not set
> >config: powerpc-allnoconfig
> >compiler: powerpc-linux-gcc (GCC) 13.2.0
> >reproduce (this is a W=1 build):
> >
> >If you fix the issue in a separate patch/commit (i.e. not just a new version of
> >the same patch/commit), kindly add following tags
> >| Reported-by: kernel test robot <lkp@intel.com>
> >| Closes: https://lore.kernel.org/oe-kbuild-all/202405071200.YgYuuCBu-lkp@intel.com/
> >
> >All warnings (new ones prefixed by >>):
> >
> >>> powerpc-linux-ld: warning: orphan section `.mbinit.text' from `mm/memblock.o' being placed in section `.mbinit.text'
> >>> powerpc-linux-ld: warning: orphan section `.mbinit.text' from `mm/memblock.o' being placed in section `.mbinit.text'
> >>> powerpc-linux-ld: warning: orphan section `.mbinit.text' from `mm/memblock.o' being placed in section `.mbinit.text'
> >
> >-- 
> >0-DAY CI Kernel Test Service
> >https://github.com/intel/lkp-tests/wiki
> 
> >reproduce (this is a W=1 build):
> >        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
> >        git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
> >        git fetch akpm-mm mm-everything
> >        git checkout akpm-mm/mm-everything
> >        b4 shazam https://lore.kernel.org/r/20240506012104.10864-1-richard.weiyang@gmail.com
> >        # save the config file
> >        mkdir build_dir && cp config build_dir/.config
> >        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
> >        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash
> 
> Can I reproduce this on x86? I don't have a powerpc machine.

The above steps are cross compiling for powerpc target on x86
machine, so you can just follow the steps to reproduce on x86.

Thanks,
Yujie

Re: [PATCH] mm/memblock: discard .text/.data if CONFIG_ARCH_KEEP_MEMBLOCK not set

Posted by Wei Yang 1 year, 7 months ago

On Wed, May 08, 2024 at 11:06:45AM +0800, Yujie Liu wrote:
>On Tue, May 07, 2024 at 08:43:50AM +0000, Wei Yang wrote:
>> On Tue, May 07, 2024 at 01:13:05PM +0800, kernel test robot wrote:
>> >Hi Wei,
>> >
>> >kernel test robot noticed the following build warnings:
>> >
>> >[auto build test WARNING on akpm-mm/mm-everything]
>> >
>> >url:    https://github.com/intel-lab-lkp/linux/commits/Wei-Yang/mm-memblock-discard-text-data-if-CONFIG_ARCH_KEEP_MEMBLOCK-not-set/20240506-092345
>> >base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
>> >patch link:    https://lore.kernel.org/r/20240506012104.10864-1-richard.weiyang%40gmail.com
>> >patch subject: [PATCH] mm/memblock: discard .text/.data if CONFIG_ARCH_KEEP_MEMBLOCK not set
>> >config: powerpc-allnoconfig
>> >compiler: powerpc-linux-gcc (GCC) 13.2.0
>> >reproduce (this is a W=1 build):
>> >
>> >If you fix the issue in a separate patch/commit (i.e. not just a new version of
>> >the same patch/commit), kindly add following tags
>> >| Reported-by: kernel test robot <lkp@intel.com>
>> >| Closes: https://lore.kernel.org/oe-kbuild-all/202405071200.YgYuuCBu-lkp@intel.com/
>> >
>> >All warnings (new ones prefixed by >>):
>> >
>> >>> powerpc-linux-ld: warning: orphan section `.mbinit.text' from `mm/memblock.o' being placed in section `.mbinit.text'
>> >>> powerpc-linux-ld: warning: orphan section `.mbinit.text' from `mm/memblock.o' being placed in section `.mbinit.text'
>> >>> powerpc-linux-ld: warning: orphan section `.mbinit.text' from `mm/memblock.o' being placed in section `.mbinit.text'
>> >
>> >-- 
>> >0-DAY CI Kernel Test Service
>> >https://github.com/intel/lkp-tests/wiki
>> 
>> >reproduce (this is a W=1 build):
>> >        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
>> >        git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
>> >        git fetch akpm-mm mm-everything
>> >        git checkout akpm-mm/mm-everything
>> >        b4 shazam https://lore.kernel.org/r/20240506012104.10864-1-richard.weiyang@gmail.com
>> >        # save the config file
>> >        mkdir build_dir && cp config build_dir/.config
>> >        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
>> >        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash
>> 
>> Can I reproduce this on x86? I don't have a powerpc machine.
>
>The above steps are cross compiling for powerpc target on x86
>machine, so you can just follow the steps to reproduce on x86.
>

Thanks, this one is helpful.

>Thanks,
>Yujie

-- 
Wei Yang
Help you, Help me

Re: [PATCH] mm/memblock: discard .text/.data if CONFIG_ARCH_KEEP_MEMBLOCK not set

Posted by Anshuman Khandual 1 year, 7 months ago

On 5/6/24 06:51, Wei Yang wrote:
> When CONFIG_ARCH_KEEP_MEMBLOCK not set, we expect to discard related
> code and data. But it doesn't until CONFIG_MEMORY_HOTPLUG not set
> neither.

When CONFIG_ARCH_KEEP_MEMBLOCK is not set memblock information both for
normal and reserved memory get freed up but should the memblock related
code and data also be freed up as well ? Then I would also believe such
memory saving will be very minimal given CONFIG_ARCH_KEEP_MEMBLOCK code
is too limited scoped in the tree.

Also could you please explain how it is related to CONFIG_MEMORY_HOTPLUG
config being set or not.

> 
> This patch puts memblock's .text/.data into its own section, so that it
> only depends on CONFIG_ARCH_KEEP_MEMBLOCK to discard related code and
> data. After this, init size increase from 2420K to 2432K.

Is not this memory size saving some what insignificant to warrant a code
change ? Also is this problem applicable only to CONFIG_ARCH_KEEP_MEMBLOCK
config. Could you also provide details on how did you measure these numbers ?

> 
> Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
> ---
>  include/asm-generic/vmlinux.lds.h | 14 +++++++++++++-
>  include/linux/memblock.h          |  8 ++++----
>  2 files changed, 17 insertions(+), 5 deletions(-)
> 
> diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
> index f7749d0f2562..775c5eedb9e6 100644
> --- a/include/asm-generic/vmlinux.lds.h
> +++ b/include/asm-generic/vmlinux.lds.h
> @@ -147,6 +147,14 @@
>  #define MEM_DISCARD(sec) *(.mem##sec)
>  #endif
>  
> +#if defined(CONFIG_ARCH_KEEP_MEMBLOCK)
> +#define MEMBLOCK_KEEP(sec)    *(.mb##sec)
> +#define MEMBLOCK_DISCARD(sec)
> +#else
> +#define MEMBLOCK_KEEP(sec)
> +#define MEMBLOCK_DISCARD(sec) *(.mb##sec)
> +#endif
> +
>  #ifndef CONFIG_HAVE_DYNAMIC_FTRACE_NO_PATCHABLE
>  #define KEEP_PATCHABLE		KEEP(*(__patchable_function_entries))
>  #define PATCHABLE_DISCARDS
> @@ -356,6 +364,7 @@
>  	*(.ref.data)							\
>  	*(.data..shared_aligned) /* percpu related */			\
>  	MEM_KEEP(init.data*)						\
> +	MEMBLOCK_KEEP(init.data*)					\
>  	*(.data.unlikely)						\
>  	__start_once = .;						\
>  	*(.data.once)							\
> @@ -573,6 +582,7 @@
>  		*(.ref.text)						\
>  		*(.text.asan.* .text.tsan.*)				\
>  	MEM_KEEP(init.text*)						\
> +	MEMBLOCK_KEEP(init.text*)					\
>  
>  
>  /* sched.text is aling to function alignment to secure we have same
> @@ -680,6 +690,7 @@
>  	KEEP(*(SORT(___kentry+*)))					\
>  	*(.init.data .init.data.*)					\
>  	MEM_DISCARD(init.data*)						\
> +	MEMBLOCK_DISCARD(init.data*)					\
>  	KERNEL_CTORS()							\
>  	MCOUNT_REC()							\
>  	*(.init.rodata .init.rodata.*)					\
> @@ -706,7 +717,8 @@
>  #define INIT_TEXT							\
>  	*(.init.text .init.text.*)					\
>  	*(.text.startup)						\
> -	MEM_DISCARD(init.text*)
> +	MEM_DISCARD(init.text*)						\
> +	MEMBLOCK_DISCARD(init.text*)
>  
>  #define EXIT_DATA							\
>  	*(.exit.data .exit.data.*)					\
> diff --git a/include/linux/memblock.h b/include/linux/memblock.h
> index e2082240586d..3e1f1d42dde7 100644
> --- a/include/linux/memblock.h
> +++ b/include/linux/memblock.h
> @@ -100,13 +100,13 @@ struct memblock {
>  
>  extern struct memblock memblock;
>  
> +#define __init_memblock        __section(".mbinit.text") __cold notrace \
> +						  __latent_entropy
> +#define __initdata_memblock    __section(".mbinit.data")
> +
>  #ifndef CONFIG_ARCH_KEEP_MEMBLOCK
> -#define __init_memblock __meminit
> -#define __initdata_memblock __meminitdata
>  void memblock_discard(void);
>  #else
> -#define __init_memblock
> -#define __initdata_memblock
>  static inline void memblock_discard(void) {}
>  #endif
>

Re: [PATCH] mm/memblock: discard .text/.data if CONFIG_ARCH_KEEP_MEMBLOCK not set

Posted by Wei Yang 1 year, 7 months ago

On Mon, May 06, 2024 at 03:30:54PM +0530, Anshuman Khandual wrote:
>
>On 5/6/24 06:51, Wei Yang wrote:
>> When CONFIG_ARCH_KEEP_MEMBLOCK not set, we expect to discard related
>> code and data. But it doesn't until CONFIG_MEMORY_HOTPLUG not set
>> neither.
>
>When CONFIG_ARCH_KEEP_MEMBLOCK is not set memblock information both for
>normal and reserved memory get freed up but should the memblock related
>code and data also be freed up as well ? Then I would also believe such

If not freed, those functions would access unpredictable area.

>memory saving will be very minimal given CONFIG_ARCH_KEEP_MEMBLOCK code
>is too limited scoped in the tree.

Not very much, it shows 12K more in it.

>
>Also could you please explain how it is related to CONFIG_MEMORY_HOTPLUG
>config being set or not.
>

This is in file include/asm-generic/vmlinux.lds.h.

MEM_KEEP/MEM_DISCARD is conditionally defined by CONFIG_MEMORY_HOTPLUG.
So even __init_memblock is defined as __meminit when CONFIG_ARCH_KEEP_MEMBLOCK
not set, it is not discarded.
                    
>>                  
>> This patch puts memblock's .text/.data into its own section, so that it
>> only depends on CONFIG_ARCH_KEEP_MEMBLOCK to discard related code and
>> data. After this, init size increase from 2420K to 2432K.
>
>Is not this memory size saving some what insignificant to warrant a code
>change ? Also is this problem applicable only to CONFIG_ARCH_KEEP_MEMBLOCK

Yes, this is not significant.

>config. Could you also provide details on how did you measure these numbers ?
>

Kernel print related info in mem_init_print_info(). One of is it
init size, which includes init_data and init_text.

>> 
>> Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
>> ---
>>  include/asm-generic/vmlinux.lds.h | 14 +++++++++++++-
>>  include/linux/memblock.h          |  8 ++++----
>>  2 files changed, 17 insertions(+), 5 deletions(-)
>> 
>> diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
>> index f7749d0f2562..775c5eedb9e6 100644
>> --- a/include/asm-generic/vmlinux.lds.h
>> +++ b/include/asm-generic/vmlinux.lds.h
>> @@ -147,6 +147,14 @@
>>  #define MEM_DISCARD(sec) *(.mem##sec)
>>  #endif
>>  
>> +#if defined(CONFIG_ARCH_KEEP_MEMBLOCK)
>> +#define MEMBLOCK_KEEP(sec)    *(.mb##sec)
>> +#define MEMBLOCK_DISCARD(sec)
>> +#else
>> +#define MEMBLOCK_KEEP(sec)
>> +#define MEMBLOCK_DISCARD(sec) *(.mb##sec)
>> +#endif
>> +
>>  #ifndef CONFIG_HAVE_DYNAMIC_FTRACE_NO_PATCHABLE
>>  #define KEEP_PATCHABLE		KEEP(*(__patchable_function_entries))
>>  #define PATCHABLE_DISCARDS
>> @@ -356,6 +364,7 @@
>>  	*(.ref.data)							\
>>  	*(.data..shared_aligned) /* percpu related */			\
>>  	MEM_KEEP(init.data*)						\
>> +	MEMBLOCK_KEEP(init.data*)					\
>>  	*(.data.unlikely)						\
>>  	__start_once = .;						\
>>  	*(.data.once)							\
>> @@ -573,6 +582,7 @@
>>  		*(.ref.text)						\
>>  		*(.text.asan.* .text.tsan.*)				\
>>  	MEM_KEEP(init.text*)						\
>> +	MEMBLOCK_KEEP(init.text*)					\
>>  
>>  
>>  /* sched.text is aling to function alignment to secure we have same
>> @@ -680,6 +690,7 @@
>>  	KEEP(*(SORT(___kentry+*)))					\
>>  	*(.init.data .init.data.*)					\
>>  	MEM_DISCARD(init.data*)						\
>> +	MEMBLOCK_DISCARD(init.data*)					\
>>  	KERNEL_CTORS()							\
>>  	MCOUNT_REC()							\
>>  	*(.init.rodata .init.rodata.*)					\
>> @@ -706,7 +717,8 @@
>>  #define INIT_TEXT							\
>>  	*(.init.text .init.text.*)					\
>>  	*(.text.startup)						\
>> -	MEM_DISCARD(init.text*)
>> +	MEM_DISCARD(init.text*)						\
>> +	MEMBLOCK_DISCARD(init.text*)
>>  
>>  #define EXIT_DATA							\
>>  	*(.exit.data .exit.data.*)					\
>> diff --git a/include/linux/memblock.h b/include/linux/memblock.h
>> index e2082240586d..3e1f1d42dde7 100644
>> --- a/include/linux/memblock.h
>> +++ b/include/linux/memblock.h
>> @@ -100,13 +100,13 @@ struct memblock {
>>  
>>  extern struct memblock memblock;
>>  
>> +#define __init_memblock        __section(".mbinit.text") __cold notrace \
>> +						  __latent_entropy
>> +#define __initdata_memblock    __section(".mbinit.data")
>> +
>>  #ifndef CONFIG_ARCH_KEEP_MEMBLOCK
>> -#define __init_memblock __meminit
>> -#define __initdata_memblock __meminitdata
>>  void memblock_discard(void);
>>  #else
>> -#define __init_memblock
>> -#define __initdata_memblock
>>  static inline void memblock_discard(void) {}
>>  #endif
>>  

-- 
Wei Yang
Help you, Help me