'asm goto' generates noticeably better code since we don't need to
test the error etc, the exception just jumps to the error handling
directly.
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
arch/riscv/include/asm/uaccess.h | 68 +++++++++++++++-----------------
1 file changed, 32 insertions(+), 36 deletions(-)
diff --git a/arch/riscv/include/asm/uaccess.h b/arch/riscv/include/asm/uaccess.h
index 84b084e388a7..d8c44705b61d 100644
--- a/arch/riscv/include/asm/uaccess.h
+++ b/arch/riscv/include/asm/uaccess.h
@@ -181,61 +181,66 @@ do { \
((x) = (__force __typeof__(x))0, -EFAULT); \
})
-#define __put_user_asm(insn, x, ptr, err) \
+#define __put_user_asm(insn, x, ptr, label) \
do { \
__typeof__(*(ptr)) __x = x; \
- __asm__ __volatile__ ( \
+ asm goto( \
"1:\n" \
- " " insn " %z1, %2\n" \
- "2:\n" \
- _ASM_EXTABLE_UACCESS_ERR(1b, 2b, %0) \
- : "+r" (err) \
- : "rJ" (__x), "m"(*(ptr))); \
+ " " insn " %z0, %1\n" \
+ _ASM_EXTABLE(1b, %l2) \
+ : : "rJ" (__x), "m"(*(ptr)) : : label); \
} while (0)
#ifdef CONFIG_64BIT
-#define __put_user_8(x, ptr, err) \
- __put_user_asm("sd", x, ptr, err)
+#define __put_user_8(x, ptr, label) \
+ __put_user_asm("sd", x, ptr, label)
#else /* !CONFIG_64BIT */
-#define __put_user_8(x, ptr, err) \
+#define __put_user_8(x, ptr, label) \
do { \
u32 __user *__ptr = (u32 __user *)(ptr); \
u64 __x = (__typeof__((x)-(x)))(x); \
__asm__ __volatile__ ( \
"1:\n" \
- " sw %z1, %3\n" \
+ " sw %z0, %2\n" \
"2:\n" \
- " sw %z2, %4\n" \
- "3:\n" \
- _ASM_EXTABLE_UACCESS_ERR(1b, 3b, %0) \
- _ASM_EXTABLE_UACCESS_ERR(2b, 3b, %0) \
- : "+r" (err) \
- : "rJ" (__x), "rJ" (__x >> 32), \
+ " sw %z1, %3\n" \
+ _ASM_EXTABLE(1b, %l4) \
+ _ASM_EXTABLE(2b, %l4) \
+ : : "rJ" (__x), "rJ" (__x >> 32), \
"m" (__ptr[__LSW]), \
- "m" (__ptr[__MSW])); \
+ "m" (__ptr[__MSW]) : : label); \
} while (0)
#endif /* CONFIG_64BIT */
-#define __put_user_nocheck(x, __gu_ptr, __pu_err) \
+#define __put_user_nocheck(x, __gu_ptr, label) \
do { \
switch (sizeof(*__gu_ptr)) { \
case 1: \
- __put_user_asm("sb", (x), __gu_ptr, __pu_err); \
+ __put_user_asm("sb", (x), __gu_ptr, label); \
break; \
case 2: \
- __put_user_asm("sh", (x), __gu_ptr, __pu_err); \
+ __put_user_asm("sh", (x), __gu_ptr, label); \
break; \
case 4: \
- __put_user_asm("sw", (x), __gu_ptr, __pu_err); \
+ __put_user_asm("sw", (x), __gu_ptr, label); \
break; \
case 8: \
- __put_user_8((x), __gu_ptr, __pu_err); \
+ __put_user_8((x), __gu_ptr, label); \
break; \
default: \
BUILD_BUG(); \
} \
} while (0)
+#define __put_user_error(x, ptr, err) \
+do { \
+ __label__ err_label; \
+ __put_user_nocheck(x, ptr, err_label); \
+ break; \
+err_label: \
+ (err) = -EFAULT; \
+} while (0)
+
/**
* __put_user: - Write a simple value into user space, with less checking.
* @x: Value to copy to user space.
@@ -266,7 +271,7 @@ do { \
__chk_user_ptr(__gu_ptr); \
\
__enable_user_access(); \
- __put_user_nocheck(__val, __gu_ptr, __pu_err); \
+ __put_user_error(__val, __gu_ptr, __pu_err); \
__disable_user_access(); \
\
__pu_err; \
@@ -340,13 +345,7 @@ do { \
} while (0)
#define __put_kernel_nofault(dst, src, type, err_label) \
-do { \
- long __kr_err = 0; \
- \
- __put_user_nocheck(*((type *)(src)), (type *)(dst), __kr_err); \
- if (unlikely(__kr_err)) \
- goto err_label; \
-} while (0)
+ __put_user_nocheck(*((type *)(src)), (type *)(dst), err_label);
static __must_check __always_inline bool user_access_begin(const void __user *ptr, size_t len)
{
@@ -361,11 +360,8 @@ static __must_check __always_inline bool user_access_begin(const void __user *pt
static inline unsigned long user_access_save(void) { return 0UL; }
static inline void user_access_restore(unsigned long enabled) { }
-#define unsafe_put_user(x, ptr, label) do { \
- long __kr_err = 0; \
- __put_user_nocheck(x, (ptr), __kr_err); \
- if (__kr_err) goto label; \
-} while (0)
+#define unsafe_put_user(x, ptr, label) \
+ __put_user_nocheck(x, (ptr), label);
#define unsafe_get_user(x, ptr, label) do { \
long __kr_err = 0; \
--
2.43.0Hi Jisheng,
kernel test robot noticed the following build errors:
[auto build test ERROR on linus/master]
[also build test ERROR on v6.10-rc6 next-20240703]
[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/Jisheng-Zhang/riscv-implement-user_access_begin-and-families/20240626-005352
base: linus/master
patch link: https://lore.kernel.org/r/20240625040500.1788-4-jszhang%40kernel.org
patch subject: [PATCH 3/4] riscv: uaccess: use 'asm goto' for put_user()
config: riscv-randconfig-r071-20240705 (https://download.01.org/0day-ci/archive/20240706/202407060732.wjARQ4O7-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project a0c6b8aef853eedaa0980f07c0a502a5a8a9740e)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240706/202407060732.wjARQ4O7-lkp@intel.com/reproduce)
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/202407060732.wjARQ4O7-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from block/ioctl.c:4:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:8:
In file included from include/linux/cacheflush.h:5:
In file included from arch/riscv/include/asm/cacheflush.h:9:
In file included from include/linux/mm.h:2253:
include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
514 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
>> block/ioctl.c:236:9: error: expected ')'
236 | return put_user(val, argp);
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
block/ioctl.c:241:9: error: expected ')'
241 | return put_user(val, argp);
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
block/ioctl.c:246:9: error: expected ')'
246 | return put_user(val, argp);
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
block/ioctl.c:251:9: error: expected ')'
251 | return put_user(val, argp);
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
block/ioctl.c:256:9: error: expected ')'
256 | return put_user(val, argp);
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
block/ioctl.c:261:9: error: expected ')'
261 | return put_user(val, argp);
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
--
In file included from block/bsg.c:8:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:8:
In file included from include/linux/cacheflush.h:5:
In file included from arch/riscv/include/asm/cacheflush.h:9:
In file included from include/linux/mm.h:2253:
include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
514 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
>> block/bsg.c:89:9: error: expected ')'
89 | return put_user(READ_ONCE(bd->max_queue), uarg);
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
block/bsg.c:125:10: error: expected ')'
125 | return put_user(30527, intp);
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
block/bsg.c:127:10: error: expected ')'
127 | return put_user(0, intp);
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
block/bsg.c:129:10: error: expected ')'
129 | return put_user(0, intp);
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
block/bsg.c:138:10: error: expected ')'
138 | return put_user(min(bd->reserved_size, queue_max_bytes(q)),
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
block/bsg.c:149:10: error: expected ')'
149 | return put_user(1, intp);
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
--
In file included from fs/read_write.c:14:
In file included from include/linux/fsnotify.h:16:
In file included from include/linux/audit.h:13:
In file included from include/linux/ptrace.h:10:
In file included from include/linux/pid_namespace.h:7:
In file included from include/linux/mm.h:2253:
include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
514 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
>> fs/read_write.c:1340:16: error: expected ')'
1340 | if (unlikely(put_user(pos, offset)))
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
fs/read_write.c:1357:16: error: expected ')'
1357 | if (unlikely(put_user(pos, offset)))
| ^
arch/riscv/include/asm/uaccess.h:301:3: note: expanded from macro 'put_user'
301 | __put_user((x), __p) : \
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
1 warning and 2 errors generated.
--
In file included from fs/file_table.c:17:
In file included from include/linux/security.h:33:
In file included from include/linux/mm.h:2253:
include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
514 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
In file included from fs/file_table.c:19:
>> include/linux/eventpoll.h:81:6: error: expected ')'
81 | if (__put_user(revents, &uevent->events) ||
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
In file included from fs/file_table.c:19:
include/linux/eventpoll.h:82:6: error: expected ')'
82 | __put_user(data, &uevent->data))
| ^
arch/riscv/include/asm/uaccess.h:274:2: note: expanded from macro '__put_user'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^
arch/riscv/include/asm/uaccess.h:238:2: note: expanded from macro '__put_user_error'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^
arch/riscv/include/asm/uaccess.h:228:3: note: expanded from macro '__put_user_nocheck'
228 | __put_user_8((x), __gu_ptr, label); \
| ^
arch/riscv/include/asm/uaccess.h:211:25: note: expanded from macro '__put_user_8'
211 | "m" (__ptr[__MSW]) : : label); \
| ^
1 warning and 2 errors generated.
..
vim +236 block/ioctl.c
66ba32dc167202c block/ioctl.c Martin K. Petersen 2012-09-18 233
9b81648cb5e3ae7 block/ioctl.c Arnd Bergmann 2019-11-29 234 static int put_ushort(unsigned short __user *argp, unsigned short val)
^1da177e4c3f415 drivers/block/ioctl.c Linus Torvalds 2005-04-16 235 {
9b81648cb5e3ae7 block/ioctl.c Arnd Bergmann 2019-11-29 @236 return put_user(val, argp);
^1da177e4c3f415 drivers/block/ioctl.c Linus Torvalds 2005-04-16 237 }
^1da177e4c3f415 drivers/block/ioctl.c Linus Torvalds 2005-04-16 238
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Hi Jisheng,
kernel test robot noticed the following build errors:
[auto build test ERROR on linus/master]
[also build test ERROR on v6.10-rc6 next-20240703]
[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/Jisheng-Zhang/riscv-implement-user_access_begin-and-families/20240626-005352
base: linus/master
patch link: https://lore.kernel.org/r/20240625040500.1788-4-jszhang%40kernel.org
patch subject: [PATCH 3/4] riscv: uaccess: use 'asm goto' for put_user()
config: riscv-randconfig-r121-20240705 (https://download.01.org/0day-ci/archive/20240705/202407051058.kE7ADWxJ-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20240705/202407051058.kE7ADWxJ-lkp@intel.com/reproduce)
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/202407051058.kE7ADWxJ-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from include/linux/uaccess.h:11,
from include/linux/sched/task.h:13,
from include/linux/sched/signal.h:9,
from include/linux/rcuwait.h:6,
from include/linux/percpu-rwsem.h:7,
from include/linux/fs.h:33,
from include/linux/compat.h:17,
from arch/riscv/include/asm/elf.h:12,
from include/linux/elf.h:6,
from include/linux/module.h:19,
from include/linux/device/driver.h:21,
from include/linux/device.h:32,
from include/linux/node.h:18,
from include/linux/cpu.h:17,
from arch/riscv/kernel/process.c:10:
arch/riscv/kernel/process.c: In function 'get_unalign_ctl':
>> arch/riscv/include/asm/uaccess.h:211:46: error: expected ')' before ':' token
211 | "m" (__ptr[__MSW]) : : label); \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:301:17: note: in expansion of macro '__put_user'
301 | __put_user((x), __p) : \
| ^~~~~~~~~~
arch/riscv/kernel/process.c:57:16: note: in expansion of macro 'put_user'
57 | return put_user(tsk->thread.align_ctl, (unsigned long __user *)adr);
| ^~~~~~~~
arch/riscv/include/asm/uaccess.h:202:30: note: to match this '('
202 | __asm__ __volatile__ ( \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:301:17: note: in expansion of macro '__put_user'
301 | __put_user((x), __p) : \
| ^~~~~~~~~~
arch/riscv/kernel/process.c:57:16: note: in expansion of macro 'put_user'
57 | return put_user(tsk->thread.align_ctl, (unsigned long __user *)adr);
| ^~~~~~~~
--
In file included from include/linux/uaccess.h:11,
from include/linux/sched/task.h:13,
from include/linux/sched/signal.h:9,
from include/linux/rcuwait.h:6,
from include/linux/percpu-rwsem.h:7,
from include/linux/fs.h:33,
from include/linux/compat.h:17,
from arch/riscv/kernel/signal.c:9:
arch/riscv/kernel/signal.c: In function 'setup_sigcontext':
>> arch/riscv/include/asm/uaccess.h:211:46: error: expected ')' before ':' token
211 | "m" (__ptr[__MSW]) : : label); \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/kernel/signal.c:290:16: note: in expansion of macro '__put_user'
290 | err |= __put_user(0, &sc->sc_extdesc.reserved);
| ^~~~~~~~~~
arch/riscv/include/asm/uaccess.h:202:30: note: to match this '('
202 | __asm__ __volatile__ ( \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/kernel/signal.c:290:16: note: in expansion of macro '__put_user'
290 | err |= __put_user(0, &sc->sc_extdesc.reserved);
| ^~~~~~~~~~
>> arch/riscv/include/asm/uaccess.h:211:46: error: expected ')' before ':' token
211 | "m" (__ptr[__MSW]) : : label); \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/kernel/signal.c:292:16: note: in expansion of macro '__put_user'
292 | err |= __put_user(END_MAGIC, &sc_ext_ptr->magic);
| ^~~~~~~~~~
arch/riscv/include/asm/uaccess.h:202:30: note: to match this '('
202 | __asm__ __volatile__ ( \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/kernel/signal.c:292:16: note: in expansion of macro '__put_user'
292 | err |= __put_user(END_MAGIC, &sc_ext_ptr->magic);
| ^~~~~~~~~~
>> arch/riscv/include/asm/uaccess.h:211:46: error: expected ')' before ':' token
211 | "m" (__ptr[__MSW]) : : label); \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/kernel/signal.c:293:16: note: in expansion of macro '__put_user'
293 | err |= __put_user(END_HDR_SIZE, &sc_ext_ptr->size);
| ^~~~~~~~~~
arch/riscv/include/asm/uaccess.h:202:30: note: to match this '('
202 | __asm__ __volatile__ ( \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/kernel/signal.c:293:16: note: in expansion of macro '__put_user'
293 | err |= __put_user(END_HDR_SIZE, &sc_ext_ptr->size);
| ^~~~~~~~~~
arch/riscv/kernel/signal.c: In function 'setup_rt_frame':
>> arch/riscv/include/asm/uaccess.h:211:46: error: expected ')' before ':' token
211 | "m" (__ptr[__MSW]) : : label); \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/kernel/signal.c:336:16: note: in expansion of macro '__put_user'
336 | err |= __put_user(0, &frame->uc.uc_flags);
| ^~~~~~~~~~
arch/riscv/include/asm/uaccess.h:202:30: note: to match this '('
202 | __asm__ __volatile__ ( \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/kernel/signal.c:336:16: note: in expansion of macro '__put_user'
336 | err |= __put_user(0, &frame->uc.uc_flags);
| ^~~~~~~~~~
>> arch/riscv/include/asm/uaccess.h:211:46: error: expected ')' before ':' token
211 | "m" (__ptr[__MSW]) : : label); \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/kernel/signal.c:337:16: note: in expansion of macro '__put_user'
337 | err |= __put_user(NULL, &frame->uc.uc_link);
| ^~~~~~~~~~
arch/riscv/include/asm/uaccess.h:202:30: note: to match this '('
202 | __asm__ __volatile__ ( \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/kernel/signal.c:337:16: note: in expansion of macro '__put_user'
337 | err |= __put_user(NULL, &frame->uc.uc_link);
| ^~~~~~~~~~
--
In file included from include/linux/uaccess.h:11,
from include/linux/sched/task.h:13,
from include/linux/sched/signal.h:9,
from include/linux/rcuwait.h:6,
from include/linux/percpu-rwsem.h:7,
from include/linux/fs.h:33,
from include/uapi/linux/aio_abi.h:31,
from include/linux/syscalls.h:82,
from arch/riscv/kernel/sys_hwprobe.c:7:
arch/riscv/kernel/sys_hwprobe.c: In function 'hwprobe_get_values':
>> arch/riscv/include/asm/uaccess.h:211:46: error: expected ')' before ':' token
211 | "m" (__ptr[__MSW]) : : label); \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:301:17: note: in expansion of macro '__put_user'
301 | __put_user((x), __p) : \
| ^~~~~~~~~~
arch/riscv/kernel/sys_hwprobe.c:278:23: note: in expansion of macro 'put_user'
278 | ret = put_user(pair.key, &pairs->key);
| ^~~~~~~~
arch/riscv/include/asm/uaccess.h:202:30: note: to match this '('
202 | __asm__ __volatile__ ( \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:301:17: note: in expansion of macro '__put_user'
301 | __put_user((x), __p) : \
| ^~~~~~~~~~
arch/riscv/kernel/sys_hwprobe.c:278:23: note: in expansion of macro 'put_user'
278 | ret = put_user(pair.key, &pairs->key);
| ^~~~~~~~
>> arch/riscv/include/asm/uaccess.h:211:46: error: expected ')' before ':' token
211 | "m" (__ptr[__MSW]) : : label); \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:301:17: note: in expansion of macro '__put_user'
301 | __put_user((x), __p) : \
| ^~~~~~~~~~
arch/riscv/kernel/sys_hwprobe.c:280:31: note: in expansion of macro 'put_user'
280 | ret = put_user(pair.value, &pairs->value);
| ^~~~~~~~
arch/riscv/include/asm/uaccess.h:202:30: note: to match this '('
202 | __asm__ __volatile__ ( \
| ^
arch/riscv/include/asm/uaccess.h:228:17: note: in expansion of macro '__put_user_8'
228 | __put_user_8((x), __gu_ptr, label); \
| ^~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:238:9: note: in expansion of macro '__put_user_nocheck'
238 | __put_user_nocheck(x, ptr, err_label); \
| ^~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:274:9: note: in expansion of macro '__put_user_error'
274 | __put_user_error(__val, __gu_ptr, __pu_err); \
| ^~~~~~~~~~~~~~~~
arch/riscv/include/asm/uaccess.h:301:17: note: in expansion of macro '__put_user'
301 | __put_user((x), __p) : \
| ^~~~~~~~~~
arch/riscv/kernel/sys_hwprobe.c:280:31: note: in expansion of macro 'put_user'
280 | ret = put_user(pair.value, &pairs->value);
| ^~~~~~~~
vim +211 arch/riscv/include/asm/uaccess.h
193
194 #ifdef CONFIG_64BIT
195 #define __put_user_8(x, ptr, label) \
196 __put_user_asm("sd", x, ptr, label)
197 #else /* !CONFIG_64BIT */
198 #define __put_user_8(x, ptr, label) \
199 do { \
200 u32 __user *__ptr = (u32 __user *)(ptr); \
201 u64 __x = (__typeof__((x)-(x)))(x); \
202 __asm__ __volatile__ ( \
203 "1:\n" \
204 " sw %z0, %2\n" \
205 "2:\n" \
206 " sw %z1, %3\n" \
207 _ASM_EXTABLE(1b, %l4) \
208 _ASM_EXTABLE(2b, %l4) \
209 : : "rJ" (__x), "rJ" (__x >> 32), \
210 "m" (__ptr[__LSW]), \
> 211 "m" (__ptr[__MSW]) : : label); \
212 } while (0)
213 #endif /* CONFIG_64BIT */
214
--
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