tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 671176b0016c80b3943cb5387312c886aba3308d commit: 26128cb6c7e6731fe644c687af97733adfdb5ee9 [7895/10581] locking/rwlocks: Add contention detection for rwlocks config: mips-allyesconfig (attached as .config) compiler: mips-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/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 26128cb6c7e6731fe644c687af97733adfdb5ee9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 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 >>): In file included from include/linux/spinlock.h:90, from include/linux/ipc.h:5, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/compat.h:14, from arch/mips/kernel/asm-offsets.c:12: 17 | #define queued_spin_unlock queued_spin_unlock | ^~~~~~~~~~~~~~~~~~ arch/mips/include/asm/spinlock.h:22:20: note: in expansion of macro 'queued_spin_unlock' 22 | static inline void queued_spin_unlock(struct qspinlock *lock) | ^~~~~~~~~~~~~~~~~~ In file included from include/asm-generic/qrwlock.h:17, from ./arch/mips/include/generated/asm/qrwlock.h:1, from arch/mips/include/asm/spinlock.h:13, from include/linux/spinlock.h:90, from include/linux/ipc.h:5, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/compat.h:14, from arch/mips/kernel/asm-offsets.c:12: include/asm-generic/qspinlock.h:94:29: note: previous definition of 'queued_spin_unlock' was here 94 | static __always_inline void queued_spin_unlock(struct qspinlock *lock) | ^~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:26:6: warning: no previous prototype for 'output_ptreg_defines' [-Wmissing-prototypes] 26 | void output_ptreg_defines(void) | ^~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:78:6: warning: no previous prototype for 'output_task_defines' [-Wmissing-prototypes] 78 | void output_task_defines(void) | ^~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:93:6: warning: no previous prototype for 'output_thread_info_defines' [-Wmissing-prototypes] 93 | void output_thread_info_defines(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:110:6: warning: no previous prototype for 'output_thread_defines' [-Wmissing-prototypes] 110 | void output_thread_defines(void) | ^~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:138:6: warning: no previous prototype for 'output_thread_fpu_defines' [-Wmissing-prototypes] 138 | void output_thread_fpu_defines(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:181:6: warning: no previous prototype for 'output_mm_defines' [-Wmissing-prototypes] 181 | void output_mm_defines(void) | ^~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:220:6: warning: no previous prototype for 'output_sc_defines' [-Wmissing-prototypes] 220 | void output_sc_defines(void) | ^~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:255:6: warning: no previous prototype for 'output_signal_defined' [-Wmissing-prototypes] 255 | void output_signal_defined(void) | ^~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:322:6: warning: no previous prototype for 'output_pbe_defines' [-Wmissing-prototypes] 322 | void output_pbe_defines(void) | ^~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:334:6: warning: no previous prototype for 'output_pm_defines' [-Wmissing-prototypes] 334 | void output_pm_defines(void) | ^~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:348:6: warning: no previous prototype for 'output_kvm_defines' [-Wmissing-prototypes] 348 | void output_kvm_defines(void) | ^~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:392:6: warning: no previous prototype for 'output_cps_defines' [-Wmissing-prototypes] 392 | void output_cps_defines(void) | ^~~~~~~~~~~~~~~~~~ -- In file included from include/linux/spinlock.h:90, from include/linux/ipc.h:5, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/compat.h:14, from arch/mips/kernel/asm-offsets.c:12: 17 | #define queued_spin_unlock queued_spin_unlock | ^~~~~~~~~~~~~~~~~~ arch/mips/include/asm/spinlock.h:22:20: note: in expansion of macro 'queued_spin_unlock' 22 | static inline void queued_spin_unlock(struct qspinlock *lock) | ^~~~~~~~~~~~~~~~~~ In file included from include/asm-generic/qrwlock.h:17, from ./arch/mips/include/generated/asm/qrwlock.h:1, from arch/mips/include/asm/spinlock.h:13, from include/linux/spinlock.h:90, from include/linux/ipc.h:5, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/compat.h:14, from arch/mips/kernel/asm-offsets.c:12: include/asm-generic/qspinlock.h:94:29: note: previous definition of 'queued_spin_unlock' was here 94 | static __always_inline void queued_spin_unlock(struct qspinlock *lock) | ^~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:26:6: warning: no previous prototype for 'output_ptreg_defines' [-Wmissing-prototypes] 26 | void output_ptreg_defines(void) | ^~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:78:6: warning: no previous prototype for 'output_task_defines' [-Wmissing-prototypes] 78 | void output_task_defines(void) | ^~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:93:6: warning: no previous prototype for 'output_thread_info_defines' [-Wmissing-prototypes] 93 | void output_thread_info_defines(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:110:6: warning: no previous prototype for 'output_thread_defines' [-Wmissing-prototypes] 110 | void output_thread_defines(void) | ^~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:138:6: warning: no previous prototype for 'output_thread_fpu_defines' [-Wmissing-prototypes] 138 | void output_thread_fpu_defines(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:181:6: warning: no previous prototype for 'output_mm_defines' [-Wmissing-prototypes] 181 | void output_mm_defines(void) | ^~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:220:6: warning: no previous prototype for 'output_sc_defines' [-Wmissing-prototypes] 220 | void output_sc_defines(void) | ^~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:255:6: warning: no previous prototype for 'output_signal_defined' [-Wmissing-prototypes] 255 | void output_signal_defined(void) | ^~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:322:6: warning: no previous prototype for 'output_pbe_defines' [-Wmissing-prototypes] 322 | void output_pbe_defines(void) | ^~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:334:6: warning: no previous prototype for 'output_pm_defines' [-Wmissing-prototypes] 334 | void output_pm_defines(void) | ^~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:348:6: warning: no previous prototype for 'output_kvm_defines' [-Wmissing-prototypes] 348 | void output_kvm_defines(void) | ^~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:392:6: warning: no previous prototype for 'output_cps_defines' [-Wmissing-prototypes] 392 | void output_cps_defines(void) | ^~~~~~~~~~~~~~~~~~ make[2]: *** [scripts/Makefile.build:117: arch/mips/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1206: prepare0] Error 2 make[1]: Target 'modules_prepare' not remade because of errors. make: *** [Makefile:185: __sub-make] Error 2 make: Target 'modules_prepare' not remade because of errors. -- In file included from include/linux/spinlock.h:90, from include/linux/ipc.h:5, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/compat.h:14, from arch/mips/kernel/asm-offsets.c:12: 17 | #define queued_spin_unlock queued_spin_unlock | ^~~~~~~~~~~~~~~~~~ arch/mips/include/asm/spinlock.h:22:20: note: in expansion of macro 'queued_spin_unlock' 22 | static inline void queued_spin_unlock(struct qspinlock *lock) | ^~~~~~~~~~~~~~~~~~ In file included from include/asm-generic/qrwlock.h:17, from ./arch/mips/include/generated/asm/qrwlock.h:1, from arch/mips/include/asm/spinlock.h:13, from include/linux/spinlock.h:90, from include/linux/ipc.h:5, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/compat.h:14, from arch/mips/kernel/asm-offsets.c:12: include/asm-generic/qspinlock.h:94:29: note: previous definition of 'queued_spin_unlock' was here 94 | static __always_inline void queued_spin_unlock(struct qspinlock *lock) | ^~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:26:6: warning: no previous prototype for 'output_ptreg_defines' [-Wmissing-prototypes] 26 | void output_ptreg_defines(void) | ^~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:78:6: warning: no previous prototype for 'output_task_defines' [-Wmissing-prototypes] 78 | void output_task_defines(void) | ^~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:93:6: warning: no previous prototype for 'output_thread_info_defines' [-Wmissing-prototypes] 93 | void output_thread_info_defines(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:110:6: warning: no previous prototype for 'output_thread_defines' [-Wmissing-prototypes] 110 | void output_thread_defines(void) | ^~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:138:6: warning: no previous prototype for 'output_thread_fpu_defines' [-Wmissing-prototypes] 138 | void output_thread_fpu_defines(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:181:6: warning: no previous prototype for 'output_mm_defines' [-Wmissing-prototypes] 181 | void output_mm_defines(void) | ^~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:220:6: warning: no previous prototype for 'output_sc_defines' [-Wmissing-prototypes] 220 | void output_sc_defines(void) | ^~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:255:6: warning: no previous prototype for 'output_signal_defined' [-Wmissing-prototypes] 255 | void output_signal_defined(void) | ^~~~~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:322:6: warning: no previous prototype for 'output_pbe_defines' [-Wmissing-prototypes] 322 | void output_pbe_defines(void) | ^~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:334:6: warning: no previous prototype for 'output_pm_defines' [-Wmissing-prototypes] 334 | void output_pm_defines(void) | ^~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:348:6: warning: no previous prototype for 'output_kvm_defines' [-Wmissing-prototypes] 348 | void output_kvm_defines(void) | ^~~~~~~~~~~~~~~~~~ arch/mips/kernel/asm-offsets.c:392:6: warning: no previous prototype for 'output_cps_defines' [-Wmissing-prototypes] 392 | void output_cps_defines(void) | ^~~~~~~~~~~~~~~~~~ make[2]: *** [scripts/Makefile.build:117: arch/mips/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1206: prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:185: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. vim +/queued_spin_unlock +17 arch/mips/include/asm/spinlock.h 346e91ee090b07 Will Deacon 2019-02-22 16 346e91ee090b07 Will Deacon 2019-02-22 @17 #define queued_spin_unlock queued_spin_unlock 346e91ee090b07 Will Deacon 2019-02-22 18 /** 346e91ee090b07 Will Deacon 2019-02-22 19 * queued_spin_unlock - release a queued spinlock 346e91ee090b07 Will Deacon 2019-02-22 20 * @lock : Pointer to queued spinlock structure 346e91ee090b07 Will Deacon 2019-02-22 21 */ 346e91ee090b07 Will Deacon 2019-02-22 22 static inline void queued_spin_unlock(struct qspinlock *lock) 346e91ee090b07 Will Deacon 2019-02-22 23 { 346e91ee090b07 Will Deacon 2019-02-22 24 /* This could be optimised with ARCH_HAS_MMIOWB */ 346e91ee090b07 Will Deacon 2019-02-22 25 mmiowb(); 346e91ee090b07 Will Deacon 2019-02-22 26 smp_store_release(&lock->locked, 0); 346e91ee090b07 Will Deacon 2019-02-22 27 } 346e91ee090b07 Will Deacon 2019-02-22 28 :::::: The code at line 17 was first introduced by commit :::::: 346e91ee090b07da8d15e36bc3169ddea6968713 mips/mmiowb: Add unconditional mmiowb() to arch_spin_unlock() :::::: TO: Will Deacon <will.deacon(a)arm.com&gt; :::::: CC: Will Deacon <will.deacon(a)arm.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org