From: kernel test robot <lkp@intel.com>
To: kernel@openeuler.org
Cc: oe-kbuild-all@lists.linux.dev
Subject: [openeuler:OLK-6.6 3485/3485] mm/internal.h:1522:55: warning: diagnostic behavior may be improved by adding the 'format(printf, 2, 0)' attribute to the declaration of 'shrinker_debugfs_name_alloc'
Date: Mon, 8 Dec 2025 16:49:46 +0800 [thread overview]
Message-ID: <202512081644.0Feaab8s-lkp@intel.com> (raw)
tree: https://gitee.com/openeuler/kernel.git OLK-6.6
head: b3214ddbe58a44bd3829617668a8d301c8f1994e
commit: 5d638f251ef64f68766caaeaf41fbe159807b392 [3485/3485] mm: shrinker: add infrastructure for dynamically allocating shrinker
config: arm64-randconfig-004-20251208 (https://download.01.org/0day-ci/archive/20251208/202512081644.0Feaab8s-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 000e46219ba1ee53fc42d35e00c314c2807e8b14)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251208/202512081644.0Feaab8s-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/202512081644.0Feaab8s-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from mm/secretmem.c:26:
>> mm/internal.h:1522:55: warning: diagnostic behavior may be improved by adding the 'format(printf, 2, 0)' attribute to the declaration of 'shrinker_debugfs_name_alloc' [-Wmissing-format-attribute]
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| __attribute__((format(printf, 2, 0)))
1520 | const char *fmt, va_list ap)
1521 | {
1522 | shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap);
| ^
mm/internal.h:1519:19: note: 'shrinker_debugfs_name_alloc' declared here
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| ^
1 warning generated.
--
In file included from mm/page_alloc.c:59:
>> mm/internal.h:1522:55: warning: diagnostic behavior may be improved by adding the 'format(printf, 2, 0)' attribute to the declaration of 'shrinker_debugfs_name_alloc' [-Wmissing-format-attribute]
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| __attribute__((format(printf, 2, 0)))
1520 | const char *fmt, va_list ap)
1521 | {
1522 | shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap);
| ^
mm/internal.h:1519:19: note: 'shrinker_debugfs_name_alloc' declared here
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| ^
mm/page_alloc.c:7210:20: warning: unused function 'has_unaccepted_memory' [-Wunused-function]
7210 | static inline bool has_unaccepted_memory(void)
| ^~~~~~~~~~~~~~~~~~~~~
2 warnings generated.
--
In file included from mm/shrinker.c:7:
>> mm/internal.h:1522:55: warning: diagnostic behavior may be improved by adding the 'format(printf, 2, 0)' attribute to the declaration of 'shrinker_debugfs_name_alloc' [-Wmissing-format-attribute]
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| __attribute__((format(printf, 2, 0)))
1520 | const char *fmt, va_list ap)
1521 | {
1522 | shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap);
| ^
mm/internal.h:1519:19: note: 'shrinker_debugfs_name_alloc' declared here
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| ^
>> mm/shrinker.c:565:53: warning: diagnostic behavior may be improved by adding the 'format(printf, 2, 3)' attribute to the declaration of 'shrinker_alloc' [-Wmissing-format-attribute]
565 | err = shrinker_debugfs_name_alloc(shrinker, fmt, ap);
| ^
include/linux/shrinker.h:111:18: note: 'shrinker_alloc' declared here
111 | struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...);
| ^
2 warnings generated.
--
In file included from mm/list_lru.c:16:
>> mm/internal.h:1522:55: warning: diagnostic behavior may be improved by adding the 'format(printf, 2, 0)' attribute to the declaration of 'shrinker_debugfs_name_alloc' [-Wmissing-format-attribute]
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| __attribute__((format(printf, 2, 0)))
1520 | const char *fmt, va_list ap)
1521 | {
1522 | shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap);
| ^
mm/internal.h:1519:19: note: 'shrinker_debugfs_name_alloc' declared here
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| ^
mm/list_lru.c:98:20: warning: unused function 'list_lru_memcg_aware' [-Wunused-function]
98 | static inline bool list_lru_memcg_aware(struct list_lru *lru)
| ^~~~~~~~~~~~~~~~~~~~
2 warnings generated.
--
In file included from mm/madvise.c:37:
>> mm/internal.h:1522:55: warning: diagnostic behavior may be improved by adding the 'format(printf, 2, 0)' attribute to the declaration of 'shrinker_debugfs_name_alloc' [-Wmissing-format-attribute]
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| __attribute__((format(printf, 2, 0)))
1520 | const char *fmt, va_list ap)
1521 | {
1522 | shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap);
| ^
mm/internal.h:1519:19: note: 'shrinker_debugfs_name_alloc' declared here
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| ^
mm/madvise.c:285:6: warning: no previous prototype for function 'force_swapin_vma' [-Wmissing-prototypes]
285 | void force_swapin_vma(struct vm_area_struct *vma)
| ^
mm/madvise.c:285:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
285 | void force_swapin_vma(struct vm_area_struct *vma)
| ^
| static
2 warnings generated.
--
In file included from mm/memblock.c:23:
>> mm/internal.h:1522:55: warning: diagnostic behavior may be improved by adding the 'format(printf, 2, 0)' attribute to the declaration of 'shrinker_debugfs_name_alloc' [-Wmissing-format-attribute]
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| __attribute__((format(printf, 2, 0)))
1520 | const char *fmt, va_list ap)
1521 | {
1522 | shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap);
| ^
mm/internal.h:1519:19: note: 'shrinker_debugfs_name_alloc' declared here
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| ^
mm/memblock.c:1444:20: warning: no previous prototype for function 'memblock_alloc_range_nid_flags' [-Wmissing-prototypes]
1444 | phys_addr_t __init memblock_alloc_range_nid_flags(phys_addr_t size,
| ^
mm/memblock.c:1444:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
1444 | phys_addr_t __init memblock_alloc_range_nid_flags(phys_addr_t size,
| ^
| static
2 warnings generated.
--
In file included from mm/mempolicy.c:111:
>> mm/internal.h:1522:55: warning: diagnostic behavior may be improved by adding the 'format(printf, 2, 0)' attribute to the declaration of 'shrinker_debugfs_name_alloc' [-Wmissing-format-attribute]
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| __attribute__((format(printf, 2, 0)))
1520 | const char *fmt, va_list ap)
1521 | {
1522 | shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap);
| ^
mm/internal.h:1519:19: note: 'shrinker_debugfs_name_alloc' declared here
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| ^
mm/mempolicy.c:1123:25: warning: variable 'vma' set but not used [-Wunused-but-set-variable]
1123 | struct vm_area_struct *vma;
| ^
mm/mempolicy.c:2959:25: warning: default initialization of an object of type 'struct vm_area_struct' with const member leaves the object uninitialized [-Wdefault-const-init-field-unsafe]
2959 | struct vm_area_struct pvma;
| ^
include/linux/mm_types.h:659:20: note: member 'vm_flags' declared 'const' here
659 | const vm_flags_t vm_flags;
| ^
3 warnings generated.
--
In file included from mm/memory.c:93:
>> mm/internal.h:1522:55: warning: diagnostic behavior may be improved by adding the 'format(printf, 2, 0)' attribute to the declaration of 'shrinker_debugfs_name_alloc' [-Wmissing-format-attribute]
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| __attribute__((format(printf, 2, 0)))
1520 | const char *fmt, va_list ap)
1521 | {
1522 | shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap);
| ^
mm/internal.h:1519:19: note: 'shrinker_debugfs_name_alloc' declared here
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| ^
mm/memory.c:5512:17: warning: variable 'nr_pages' set but not used [-Wunused-but-set-variable]
5512 | int flags = 0, nr_pages;
| ^
2 warnings generated.
--
In file included from mm/shmem.c:43:
mm/swap.h:66:19: error: call to undeclared function 'swp_offset'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
66 | pgoff_t offset = swp_offset(entry);
| ^
In file included from mm/shmem.c:58:
include/linux/mman.h:158:9: warning: division by zero is undefined [-Wdivision-by-zero]
158 | _calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) |
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mman.h:136:21: note: expanded from macro '_calc_vm_trans'
136 | : ((x) & (bit1)) / ((bit1) / (bit2))))
| ^ ~~~~~~~~~~~~~~~~~
include/linux/mman.h:159:9: warning: division by zero is undefined [-Wdivision-by-zero]
159 | _calc_vm_trans(flags, MAP_STACK, VM_NOHUGEPAGE) |
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mman.h:136:21: note: expanded from macro '_calc_vm_trans'
136 | : ((x) & (bit1)) / ((bit1) / (bit2))))
| ^ ~~~~~~~~~~~~~~~~~
In file included from mm/shmem.c:68:
include/linux/swapops.h:107:23: error: static declaration of 'swp_offset' follows non-static declaration
107 | static inline pgoff_t swp_offset(swp_entry_t entry)
| ^
mm/swap.h:66:19: note: previous implicit declaration is here
66 | pgoff_t offset = swp_offset(entry);
| ^
In file included from mm/shmem.c:86:
>> mm/internal.h:1522:55: warning: diagnostic behavior may be improved by adding the 'format(printf, 2, 0)' attribute to the declaration of 'shrinker_debugfs_name_alloc' [-Wmissing-format-attribute]
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| __attribute__((format(printf, 2, 0)))
1520 | const char *fmt, va_list ap)
1521 | {
1522 | shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap);
| ^
mm/internal.h:1519:19: note: 'shrinker_debugfs_name_alloc' declared here
1519 | static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
| ^
mm/shmem.c:1747:24: warning: default initialization of an object of type 'struct vm_area_struct' with const member leaves the object uninitialized [-Wdefault-const-init-field-unsafe]
1747 | struct vm_area_struct pvma;
| ^
include/linux/mm_types.h:659:20: note: member 'vm_flags' declared 'const' here
659 | const vm_flags_t vm_flags;
| ^
mm/shmem.c:1877:24: warning: default initialization of an object of type 'struct vm_area_struct' with const member leaves the object uninitialized [-Wdefault-const-init-field-unsafe]
1877 | struct vm_area_struct pvma;
| ^
include/linux/mm_types.h:659:20: note: member 'vm_flags' declared 'const' here
659 | const vm_flags_t vm_flags;
| ^
5 warnings and 2 errors generated.
Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for ARCH_SUPPORTS_SCHED_SOFT_QUOTA
Depends on [n]: CGROUPS [=n]
Selected by [y]:
- ARM64 [=y]
vim +1522 mm/internal.h
1513
1514 /* shrinker related functions */
1515 unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg,
1516 int priority);
1517
1518 #ifdef CONFIG_SHRINKER_DEBUG
1519 static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
1520 const char *fmt, va_list ap)
1521 {
> 1522 shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap);
1523
1524 return shrinker->name ? 0 : -ENOMEM;
1525 }
1526
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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