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SubjectRe: [PATCH] mm: memcg/slab: fix slab statistics in !SMP configuration
Hi Roman,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on mmotm/master]

url: https://github.com/0day-ci/linux/commits/Roman-Gushchin/mm-memcg-slab-fix-slab-statistics-in-SMP-configuration/20201002-044114
base: git://git.cmpxchg.org/linux-mmotm.git master
config: x86_64-randconfig-a004-20201003 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project bcd05599d0e53977a963799d6ee4f6e0bc21331b)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
# https://github.com/0day-ci/linux/commit/3e4248734433fea1624e4971258042af2f231e02
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Roman-Gushchin/mm-memcg-slab-fix-slab-statistics-in-SMP-configuration/20201002-044114
git checkout 3e4248734433fea1624e4971258042af2f231e02
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64

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

All errors (new ones prefixed by >>):

In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:20:
include/linux/mm.h:162:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
case 72:
^
include/linux/mm.h:162:2: note: insert '__attribute__((fallthrough));' to silence this warning
case 72:
^
__attribute__((fallthrough));
include/linux/mm.h:162:2: note: insert 'break;' to avoid fall-through
case 72:
^
break;
include/linux/mm.h:164:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
case 64:
^
include/linux/mm.h:164:2: note: insert '__attribute__((fallthrough));' to silence this warning
case 64:
^
__attribute__((fallthrough));
include/linux/mm.h:164:2: note: insert 'break;' to avoid fall-through
case 64:
^
break;
include/linux/mm.h:166:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
case 56:
^
include/linux/mm.h:166:2: note: insert '__attribute__((fallthrough));' to silence this warning
case 56:
^
__attribute__((fallthrough));
include/linux/mm.h:166:2: note: insert 'break;' to avoid fall-through
case 56:
^
break;
In file included from arch/x86/kernel/asm-offsets.c:13:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:20:
In file included from include/linux/mm.h:1317:
>> include/linux/vmstat.h:295:6: error: implicit declaration of function 'vmstat_item_in_bytes' [-Werror,-Wimplicit-function-declaration]
if (vmstat_item_in_bytes(item)) {
^
3 warnings and 1 error generated.
make[2]: *** [scripts/Makefile.build:99: arch/x86/kernel/asm-offsets.s] Error 1
make[2]: Target '__build' not remade because of errors.
make[1]: *** [Makefile:1139: prepare0] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:179: sub-make] Error 2
make: Target 'prepare' not remade because of errors.

vim +/vmstat_item_in_bytes +295 include/linux/vmstat.h

291
292 static inline void __mod_node_page_state(struct pglist_data *pgdat,
293 enum node_stat_item item, int delta)
294 {
> 295 if (vmstat_item_in_bytes(item)) {
296 VM_WARN_ON_ONCE(delta & (PAGE_SIZE - 1));
297 delta >>= PAGE_SHIFT;
298 }
299
300 node_page_state_add(delta, pgdat, item);
301 }
302

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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