From: kernel test robot <lkp@intel.com>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev
Subject: [ardb:arm64-va-simplify 1/13] mm/zsmalloc.c:224:21: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
Date: Sun, 10 Nov 2024 12:03:43 +0800 [thread overview]
Message-ID: <202411101142.p3okQp2c-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git arm64-va-simplify
head: b03c9fa1f2d03aeece38f4b8ea8c05edb0e156b2
commit: 955d113b8b4401950ea83647579b79bff73843e0 [1/13] arm64/mm: Reduce PA space to 48 bits when LPA2 is not enabled
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20241110/202411101142.p3okQp2c-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 592c0fe55f6d9a811028b5f3507be91458ab2713)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241110/202411101142.p3okQp2c-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/202411101142.p3okQp2c-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
In file included from mm/zsmalloc.c:47:
In file included from include/linux/highmem.h:8:
In file included from include/linux/cacheflush.h:5:
In file included from arch/arm64/include/asm/cacheflush.h:11:
In file included from include/linux/kgdb.h:19:
In file included from include/linux/kprobes.h:28:
In file included from include/linux/ftrace.h:13:
In file included from include/linux/kallsyms.h:13:
In file included from include/linux/mm.h:2225:
include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
504 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
505 | item];
| ~~~~
include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
511 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
512 | NR_VM_NUMA_EVENT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~~
include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
524 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~ ^
525 | NR_VM_NUMA_EVENT_ITEMS +
| ~~~~~~~~~~~~~~~~~~~~~~
>> mm/zsmalloc.c:224:32: warning: variable length array used [-Wvla]
224 | struct size_class *size_class[ZS_SIZE_CLASSES];
| ^~~~~~~~~~~~~~~
mm/zsmalloc.c:146:59: note: expanded from macro 'ZS_SIZE_CLASSES'
146 | #define ZS_SIZE_CLASSES (DIV_ROUND_UP(ZS_MAX_ALLOC_SIZE - ZS_MIN_ALLOC_SIZE, \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
147 | ZS_SIZE_CLASS_DELTA) + 1)
| ~~~~~~~~~~~~~~~~~~~~~~~~~
mm/zsmalloc.c:128:52: note: expanded from macro 'ZS_MIN_ALLOC_SIZE'
128 | MAX(32, (ZS_MAX_PAGES_PER_ZSPAGE << PAGE_SHIFT >> OBJ_INDEX_BITS))
| ^
mm/zsmalloc.c:116:41: note: expanded from macro 'OBJ_INDEX_BITS'
116 | #define OBJ_INDEX_BITS (BITS_PER_LONG - _PFN_BITS)
| ^
note: (skipping 4 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/minmax.h:330:30: note: expanded from macro 'MAX'
330 | #define MAX(a,b) __cmp(max,a,b)
| ^
include/linux/minmax.h:90:45: note: expanded from macro '__cmp'
90 | #define __cmp(op, x, y) ((x) __cmp_op_##op (y) ? (x) : (y))
| ^
include/uapi/linux/const.h:51:40: note: expanded from macro '__KERNEL_DIV_ROUND_UP'
51 | #define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
| ^
>> mm/zsmalloc.c:224:21: error: fields must have a constant size: 'variable length array in structure' extension will never be supported
224 | struct size_class *size_class[ZS_SIZE_CLASSES];
| ^
5 warnings and 1 error generated.
Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for MODVERSIONS
Depends on [n]: MODULES [=y] && !COMPILE_TEST [=y]
Selected by [y]:
- RANDSTRUCT_FULL [=y] && (CC_HAS_RANDSTRUCT [=y] || GCC_PLUGINS [=n]) && MODULES [=y]
vim +224 mm/zsmalloc.c
0959c63f11c3bb drivers/staging/zsmalloc/zsmalloc-main.c Seth Jennings 2012-08-08 220
0959c63f11c3bb drivers/staging/zsmalloc/zsmalloc-main.c Seth Jennings 2012-08-08 221 struct zs_pool {
6f3526d6db7cbe mm/zsmalloc.c Sergey SENOZHATSKY 2015-11-06 222 const char *name;
0f050d997e275c mm/zsmalloc.c Ganesh Mahendran 2015-02-12 223
cf8e0fedf0784e mm/zsmalloc.c Jerome Marchand 2017-07-10 @224 struct size_class *size_class[ZS_SIZE_CLASSES];
2e40e163a25af3 mm/zsmalloc.c Minchan Kim 2015-04-15 225 struct kmem_cache *handle_cachep;
3783689a1aa82e mm/zsmalloc.c Minchan Kim 2016-07-26 226 struct kmem_cache *zspage_cachep;
0959c63f11c3bb drivers/staging/zsmalloc/zsmalloc-main.c Seth Jennings 2012-08-08 227
13de8933c96b45 mm/zsmalloc.c Minchan Kim 2014-10-09 228 atomic_long_t pages_allocated;
0f050d997e275c mm/zsmalloc.c Ganesh Mahendran 2015-02-12 229
7d3f3938236b4b mm/zsmalloc.c Sergey Senozhatsky 2015-09-08 230 struct zs_pool_stats stats;
ab9d306d9c3bf6 mm/zsmalloc.c Sergey Senozhatsky 2015-09-08 231
ab9d306d9c3bf6 mm/zsmalloc.c Sergey Senozhatsky 2015-09-08 232 /* Compact classes */
c19b548b493455 mm/zsmalloc.c Qi Zheng 2023-09-11 233 struct shrinker *shrinker;
93144ca35041b0 mm/zsmalloc.c Aliaksei Karaliou 2018-01-31 234
:::::: The code at line 224 was first introduced by commit
:::::: cf8e0fedf0784ef4bc1889380b09eda295e3d109 mm/zsmalloc: simplify zs_max_alloc_size handling
:::::: TO: Jerome Marchand <jmarchan@redhat.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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