Re: [PATCH v2 3/5] mm/memcg: Cache vmstat data in percpu memcg_stock_pcp

[kernel test robot <lkp@intel.com>]

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Hi Waiman,

I love your patch! Perhaps something to improve:

[auto build test WARNING on dennis-percpu/for-next]
[also build test WARNING on linus/master v5.12-rc7 next-20210413]
[cannot apply to hnaz-linux-mm/master]
[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]

url:    https://github.com/0day-ci/linux/commits/Waiman-Long/mm-memcg-Reduce-kmemcache-memory-accounting-overhead/20210413-065659
base:   https://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu.git for-next
config: mips-randconfig-r031-20210413 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9829f5e6b1bca9b61efc629770d28bb9014dec45)
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 mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://github.com/0day-ci/linux/commit/565fa80b02eeb06c48a88ac6354a4fc9e5addd06
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Waiman-Long/mm-memcg-Reduce-kmemcache-memory-accounting-overhead/20210413-065659
        git checkout 565fa80b02eeb06c48a88ac6354a4fc9e5addd06
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips 

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

All warnings (new ones prefixed by >>):

   In file included from mm/mempool.c:22:
>> mm/slab.h:401:13: warning: unused function 'mod_obj_stock_state' [-Wunused-function]
   static void mod_obj_stock_state(struct obj_cgroup *objcg,
               ^
   1 warning generated.
--
   In file included from mm/oom_kill.c:49:
>> mm/slab.h:401:13: warning: unused function 'mod_obj_stock_state'
   static void mod_obj_stock_state(struct obj_cgroup
   ^
   fatal error: error in backend: Nested variants found in inline asm string: ' .set push
   .set mips64r2
   .if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/bitops.h", .line = 105, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif
   1: ll $0, $1
   or $0, $2
   sc $0, $1
   beqz $0, 1b
   .set pop
   '
   clang-13: error: clang frontend command failed with exit code 70 (use -v to see invocation)
   clang version 13.0.0 (git://gitmirror/llvm_project 9829f5e6b1bca9b61efc629770d28bb9014dec45)
   Target: mipsel-unknown-linux-gnu
   Thread model: posix
   InstalledDir: /opt/cross/clang-9829f5e6b1/bin
   clang-13: note: diagnostic msg:
   Makefile arch block certs crypto drivers fs include init ipc kernel lib mm scripts security sound source usr virt
--
   In file included from mm/slab_common.c:33:
>> mm/slab.h:401:13: warning: unused function 'mod_obj_stock_state'
   static void mod_obj_stock_state(struct obj_cgroup
   ^
   fatal error: error in backend: Nested variants found in inline asm string: ' .set push
   .set mips64r2
   .if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/atomic.h", .line = 153, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif
   1: ll $0, $1 # atomic_add
   addu $0, $2
   sc $0, $1
   beqz $0, 1b
   .set pop
   '
   clang-13: error: clang frontend command failed with exit code 70 (use -v to see invocation)
   clang version 13.0.0 (git://gitmirror/llvm_project 9829f5e6b1bca9b61efc629770d28bb9014dec45)
   Target: mipsel-unknown-linux-gnu
   Thread model: posix
   InstalledDir: /opt/cross/clang-9829f5e6b1/bin
   clang-13: note: diagnostic msg:
   Makefile arch block certs crypto drivers fs include init ipc kernel lib mm scripts security sound source usr virt
--
   In file included from mm/slub.c:20:
>> mm/slab.h:401:13: warning: unused function 'mod_obj_stock_state'
   static void mod_obj_stock_state(struct obj_cgroup
   ^
   mm/slub.c:1503:29: warning: unused function 'node_nr_slabs'
   static inline unsigned long node_nr_slabs(struct kmem_cache_node
   ^
   mm/slub.c:1521:21: warning: unused function 'kmalloc_large_node_hook'
   static inline void size_t size, gfp_t flags)
   ^
   fatal error: error in backend: Nested variants found in inline asm string: ' .set push
   .set mips64r2
   .if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/bitops.h", .line = 192, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif
   1: ll $0, $2
   or $1, $0, $3
   sc $1, $2
   beqz $1, 1b
   .set pop
   '
   clang-13: error: clang frontend command failed with exit code 70 (use -v to see invocation)
   clang version 13.0.0 (git://gitmirror/llvm_project 9829f5e6b1bca9b61efc629770d28bb9014dec45)
   Target: mipsel-unknown-linux-gnu
   Thread model: posix
   InstalledDir: /opt/cross/clang-9829f5e6b1/bin
   clang-13: note: diagnostic msg:
   Makefile arch block certs crypto drivers fs include init ipc kernel lib mm scripts security sound source usr virt


vim +/mod_obj_stock_state +401 mm/slab.h

   400	
 > 401	static void mod_obj_stock_state(struct obj_cgroup *objcg,
   402					struct pglist_data *pgdat, int idx, int nr)
   403	{
   404	}
   405	#endif /* CONFIG_MEMCG_KMEM */
   406	

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

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