tree: https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/membarrier head: 07a8b963002cb955b7516e61bad19514a3acaa82 commit: f184d013a255a523116b692db4996c5db2569e86 [4/8] membarrier: Make the post-switch-mm barrier explicit config: ia64-randconfig-r015-20210615 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git/commit/?id... git remote add luto https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git git fetch --no-tags luto x86/membarrier git checkout f184d013a255a523116b692db4996c5db2569e86 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): kernel/kthread.c: In function 'kthread_use_mm': 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from <command-line>: 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~ include/linux/compiler_types.h:308:9: note: in definition of macro '__compiletime_assert' 308 | if (!(condition)) \ | ^~~~~~~~~ include/linux/compiler_types.h:328:2: note: in expansion of macro '_compiletime_assert' 328 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:36:2: note: in expansion of macro 'compiletime_assert' 36 | compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \ | ^~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:36:21: note: in expansion of macro '__native_word' 36 | compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \ | ^~~~~~~~~~~~~ include/asm-generic/rwonce.h:49:2: note: in expansion of macro 'compiletime_assert_rwonce_type' 49 | compiletime_assert_rwonce_type(x); \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/ia64/include/asm/atomic.h:24:25: note: in expansion of macro 'READ_ONCE' 24 | #define atomic_read(v) READ_ONCE((v)->counter) | ^~~~~~~~~ kernel/kthread.c:1328:30: note: in expansion of macro 'atomic_read' 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~~~~~~~~~~ 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~ include/linux/compiler_types.h:308:9: note: in definition of macro '__compiletime_assert' 308 | if (!(condition)) \ | ^~~~~~~~~ include/linux/compiler_types.h:328:2: note: in expansion of macro '_compiletime_assert' 328 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:36:2: note: in expansion of macro 'compiletime_assert' 36 | compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \ | ^~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:36:21: note: in expansion of macro '__native_word' 36 | compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \ | ^~~~~~~~~~~~~ include/asm-generic/rwonce.h:49:2: note: in expansion of macro 'compiletime_assert_rwonce_type' 49 | compiletime_assert_rwonce_type(x); \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/ia64/include/asm/atomic.h:24:25: note: in expansion of macro 'READ_ONCE' 24 | #define atomic_read(v) READ_ONCE((v)->counter) | ^~~~~~~~~ kernel/kthread.c:1328:30: note: in expansion of macro 'atomic_read' 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~~~~~~~~~~ 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~ include/linux/compiler_types.h:308:9: note: in definition of macro '__compiletime_assert' 308 | if (!(condition)) \ | ^~~~~~~~~ include/linux/compiler_types.h:328:2: note: in expansion of macro '_compiletime_assert' 328 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:36:2: note: in expansion of macro 'compiletime_assert' 36 | compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \ | ^~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:36:21: note: in expansion of macro '__native_word' 36 | compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \ | ^~~~~~~~~~~~~ include/asm-generic/rwonce.h:49:2: note: in expansion of macro 'compiletime_assert_rwonce_type' 49 | compiletime_assert_rwonce_type(x); \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/ia64/include/asm/atomic.h:24:25: note: in expansion of macro 'READ_ONCE' 24 | #define atomic_read(v) READ_ONCE((v)->counter) | ^~~~~~~~~ kernel/kthread.c:1328:30: note: in expansion of macro 'atomic_read' 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~~~~~~~~~~ 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~ include/linux/compiler_types.h:308:9: note: in definition of macro '__compiletime_assert' 308 | if (!(condition)) \ | ^~~~~~~~~ include/linux/compiler_types.h:328:2: note: in expansion of macro '_compiletime_assert' 328 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:36:2: note: in expansion of macro 'compiletime_assert' 36 | compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \ | ^~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:36:21: note: in expansion of macro '__native_word' 36 | compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \ | ^~~~~~~~~~~~~ include/asm-generic/rwonce.h:49:2: note: in expansion of macro 'compiletime_assert_rwonce_type' 49 | compiletime_assert_rwonce_type(x); \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/ia64/include/asm/atomic.h:24:25: note: in expansion of macro 'READ_ONCE' 24 | #define atomic_read(v) READ_ONCE((v)->counter) | ^~~~~~~~~ kernel/kthread.c:1328:30: note: in expansion of macro 'atomic_read' 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~~~~~~~~~~ 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~ include/linux/compiler_types.h:308:9: note: in definition of macro '__compiletime_assert' 308 | if (!(condition)) \ | ^~~~~~~~~ include/linux/compiler_types.h:328:2: note: in expansion of macro '_compiletime_assert' 328 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:36:2: note: in expansion of macro 'compiletime_assert' 36 | compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \ | ^~~~~~~~~~~~~~~~~~ include/asm-generic/rwonce.h:49:2: note: in expansion of macro 'compiletime_assert_rwonce_type' 49 | compiletime_assert_rwonce_type(x); \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/ia64/include/asm/atomic.h:24:25: note: in expansion of macro 'READ_ONCE' 24 | #define atomic_read(v) READ_ONCE((v)->counter) | ^~~~~~~~~ kernel/kthread.c:1328:30: note: in expansion of macro 'atomic_read' 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~~~~~~~~~~ 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~ include/linux/compiler_types.h:279:13: note: in definition of macro '__unqual_scalar_typeof' 279 | _Generic((x), \ | ^ include/asm-generic/rwonce.h:50:2: note: in expansion of macro '__READ_ONCE' 50 | __READ_ONCE(x); \ | ^~~~~~~~~~~ arch/ia64/include/asm/atomic.h:24:25: note: in expansion of macro 'READ_ONCE' 24 | #define atomic_read(v) READ_ONCE((v)->counter) | ^~~~~~~~~ kernel/kthread.c:1328:30: note: in expansion of macro 'atomic_read' 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~~~~~~~~~~ In file included from ./arch/ia64/include/generated/asm/rwonce.h:1, from include/linux/compiler.h:248, from include/asm-generic/bug.h:5, from arch/ia64/include/asm/bug.h:17, from include/linux/bug.h:5, from include/linux/mmdebug.h:5, from include/linux/mm.h:9, from kernel/kthread.c:11: 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~ include/asm-generic/rwonce.h:44:72: note: in definition of macro '__READ_ONCE' 44 | #define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x)) | ^ arch/ia64/include/asm/atomic.h:24:25: note: in expansion of macro 'READ_ONCE' 24 | #define atomic_read(v) READ_ONCE((v)->counter) | ^~~~~~~~~ kernel/kthread.c:1328:30: note: in expansion of macro 'atomic_read' 1328 | membarrier_finish_switch_mm(atomic_read(&mm->membarrier_state)); | ^~~~~~~~~~~ cc1: some warnings being treated as errors -- kernel/sched/core.c:2850:6: warning: no previous prototype for 'sched_set_stop_task' [-Wmissing-prototypes] 2850 | void sched_set_stop_task(int cpu, struct task_struct *stop) | ^~~~~~~~~~~~~~~~~~~ kernel/sched/core.c: In function 'context_switch': 4312 | membarrier_finish_switch_mm(rq->membarrier_state); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ | membarrier_switch_mm 4312 | membarrier_finish_switch_mm(rq->membarrier_state); | ^~ cc1: some warnings being treated as errors vim +/membarrier_finish_switch_mm +1328 kernel/kthread.c 1304 1305 /** 1306 * kthread_use_mm - make the calling kthread operate on an address space 1307 * @mm: address space to operate on 1308 */ 1309 void kthread_use_mm(struct mm_struct *mm) 1310 { 1311 struct mm_struct *active_mm; 1312 struct task_struct *tsk = current; 1313 1314 WARN_ON_ONCE(!(tsk->flags & PF_KTHREAD)); 1315 WARN_ON_ONCE(tsk->mm); 1316 1317 task_lock(tsk); 1318 /* Hold off tlb flush IPIs while switching mm's */ 1319 local_irq_disable(); 1320 active_mm = tsk->active_mm; 1321 if (active_mm != mm) { 1322 mmgrab(mm); 1323 tsk->active_mm = mm; 1324 } 1325 tsk->mm = mm; 1326 membarrier_update_current_mm(mm); 1327 switch_mm_irqs_off(active_mm, mm, tsk); 1329 local_irq_enable(); 1330 task_unlock(tsk); 1331 #ifdef finish_arch_post_lock_switch 1332 finish_arch_post_lock_switch(); 1333 #endif 1334 1335 if (active_mm != mm) 1336 mmdrop(active_mm); 1337 1338 to_kthread(tsk)->oldfs = force_uaccess_begin(); 1339 } 1340 EXPORT_SYMBOL_GPL(kthread_use_mm); 1341 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org