tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c5c17547b778975b3d83a73c8d84e8fb5ecf3ba5 commit: b4e0b68fbd9d1fd7e31cbe8adca3ad6cf556e2ee mm: memcontrol: use obj_cgroup APIs to charge kmem pages date: 7 months ago config: mips-randconfig-r022-20211122 (https://download.01.org/0day-ci/archive/20211127/202111271029.EeYluWMG-lkp@xxxxxxxxx/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c133fb321f7ca6083ce15b6aa5bf89de6600e649) 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4e0b68fbd9d1fd7e31cbe8adca3ad6cf556e2ee git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout b4e0b68fbd9d1fd7e31cbe8adca3ad6cf556e2ee # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> mm/memcontrol.c:1058:29: warning: unused function 'memcg_kmem_bypass' static __always_inline bool memcg_kmem_bypass(void) ^ fatal error: error in backend: Nested variants found in inline asm string: ' .set push .set noat .set push .set arch=r4000 .if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/cmpxchg.h", .line = 163, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif 1: ll $0, $2 # __cmpxchg_asm bne $0, ${3:z}, 2f .set pop move $$1, ${4:z} .set arch=r4000 sc $$1, $1 beqz $$1, 1b .set pop 2: .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/cmpxchg.h", .line = 163, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif ' clang-14: error: clang frontend command failed with exit code 70 (use -v to see invocation) clang version 14.0.0 (git://gitmirror/llvm_project 5162b558d8c0b542e752b037e72a69d5fd51eb1e) Target: mips-unknown-linux Thread model: posix InstalledDir: /opt/cross/clang-5162b558d8/bin clang-14: note: diagnostic msg: Makefile arch block certs crypto drivers fs include init ipc kernel lib mm net nr_bisected scripts security sound source usr virt vim +/memcg_kmem_bypass +1058 mm/memcontrol.c 279c3393e2c1133 Roman Gushchin 2020-10-17 1057 4127c6504f25c4f Roman Gushchin 2020-10-17 @1058 static __always_inline bool memcg_kmem_bypass(void) 4127c6504f25c4f Roman Gushchin 2020-10-17 1059 { 4127c6504f25c4f Roman Gushchin 2020-10-17 1060 /* Allow remote memcg charging from any context. */ 4127c6504f25c4f Roman Gushchin 2020-10-17 1061 if (unlikely(active_memcg())) 4127c6504f25c4f Roman Gushchin 2020-10-17 1062 return false; 4127c6504f25c4f Roman Gushchin 2020-10-17 1063 4127c6504f25c4f Roman Gushchin 2020-10-17 1064 /* Memcg to charge can't be determined. */ 4127c6504f25c4f Roman Gushchin 2020-10-17 1065 if (in_interrupt() || !current->mm || (current->flags & PF_KTHREAD)) 4127c6504f25c4f Roman Gushchin 2020-10-17 1066 return true; 4127c6504f25c4f Roman Gushchin 2020-10-17 1067 4127c6504f25c4f Roman Gushchin 2020-10-17 1068 return false; 4127c6504f25c4f Roman Gushchin 2020-10-17 1069 } 4127c6504f25c4f Roman Gushchin 2020-10-17 1070 :::::: The code at line 1058 was first introduced by commit :::::: 4127c6504f25c4fcff52dc996efda2ef859dd661 mm: kmem: enable kernel memcg accounting from interrupt contexts :::::: TO: Roman Gushchin <guro@xxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
