CC: kbuild-all(a)lists.01.org CC: linux-kernel(a)vger.kernel.org TO: Boqun Feng CC: Peter Zijlstra tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c9194f32bfd932e976a158d1af97a63be68a2aab commit: 9271a40d2a1429113160ccc4c16150921600bcc1 lockdep/selftest: Add wait context selftests date: 7 months ago :::::: branch date: 5 hours ago :::::: commit date: 7 months ago config: arm64-randconfig-s032-20210806 (attached as .config) compiler: aarch64-linux-gcc (GCC) 10.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-348-gf0e6938b-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9271a40d2a1429113160ccc4c16150921600bcc1 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 9271a40d2a1429113160ccc4c16150921600bcc1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot sparse warnings: (new ones prefixed by >>) lib/locking-selftest.c:298:1: sparse: sparse: context imbalance in 'AA_spin' - wrong count at exit lib/locking-selftest.c:300:1: sparse: sparse: context imbalance in 'AA_wlock' - wrong count at exit lib/locking-selftest.c:302:1: sparse: sparse: context imbalance in 'AA_rlock' - wrong count at exit lib/locking-selftest.c:321:13: sparse: sparse: context imbalance in 'rlock_AA1' - wrong count at exit lib/locking-selftest.c:327:13: sparse: sparse: context imbalance in 'rlock_AA1B' - wrong count at exit lib/locking-selftest.c:347:13: sparse: sparse: context imbalance in 'rlock_AA2' - wrong count at exit lib/locking-selftest.c:359:13: sparse: sparse: context imbalance in 'rlock_AA3' - wrong count at exit lib/locking-selftest.c:722:1: sparse: sparse: context imbalance in 'double_unlock_spin' - unexpected unlock lib/locking-selftest.c:724:1: sparse: sparse: context imbalance in 'double_unlock_wlock' - unexpected unlock lib/locking-selftest.c:726:1: sparse: sparse: context imbalance in 'double_unlock_rlock' - unexpected unlock lib/locking-selftest.c:753:1: sparse: sparse: context imbalance in 'init_held_spin' - wrong count at exit lib/locking-selftest.c:755:1: sparse: sparse: context imbalance in 'init_held_wlock' - wrong count at exit lib/locking-selftest.c:757:1: sparse: sparse: context imbalance in 'init_held_rlock' - wrong count at exit lib/locking-selftest.c: note: in included file (through include/linux/rculist.h, include/linux/pid.h, include/linux/sched.h): include/linux/rcupdate.h:694:9: sparse: sparse: context imbalance in 'rcu_exit' - unexpected unlock include/linux/rcupdate.h:729:25: sparse: sparse: context imbalance in 'rcu_bh_exit' - unexpected unlock include/linux/rcupdate.h:771:25: sparse: sparse: context imbalance in 'rcu_sched_exit' - unexpected unlock lib/locking-selftest.c:2493:13: sparse: sparse: context imbalance in 'raw_spinlock_exit' - unexpected unlock lib/locking-selftest.c:2502:13: sparse: sparse: context imbalance in 'spinlock_exit' - unexpected unlock lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_HARDIRQ' - wrong count at exit lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_NOTTHREADED_HARDIRQ' - wrong count at exit lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_SOFTIRQ' - wrong count at exit lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_RCU' - wrong count at exit lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_RCU_BH' - wrong count at exit lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_RCU_CALLBACK' - wrong count at exit lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_RCU_SCHED' - wrong count at exit lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_RAW_SPINLOCK' - wrong count at exit lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_SPINLOCK' - wrong count at exit lib/locking-selftest.c:2573:1: sparse: sparse: context imbalance in 'RCU_in_MUTEX' - wrong count at exit lib/locking-selftest.c: note: in included file (through include/linux/thread_info.h, arch/arm64/include/asm/preempt.h, include/linux/preempt.h, ...): >> arch/arm64/include/asm/current.h:19:9: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_HARDIRQ' - wrong count at exit >> arch/arm64/include/asm/current.h:19:9: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_NOTTHREADED_HARDIRQ' - wrong count at exit >> arch/arm64/include/asm/current.h:19:9: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_SOFTIRQ' - wrong count at exit lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_RCU' - wrong count at exit lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_RCU_BH' - wrong count at exit lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_RCU_CALLBACK' - wrong count at exit lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_RCU_SCHED' - wrong count at exit lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_RAW_SPINLOCK' - wrong count at exit lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_SPINLOCK' - wrong count at exit lib/locking-selftest.c:2574:1: sparse: sparse: context imbalance in 'RAW_SPINLOCK_in_MUTEX' - wrong count at exit >> arch/arm64/include/asm/current.h:19:9: sparse: sparse: context imbalance in 'SPINLOCK_in_HARDIRQ' - wrong count at exit >> arch/arm64/include/asm/current.h:19:9: sparse: sparse: context imbalance in 'SPINLOCK_in_NOTTHREADED_HARDIRQ' - wrong count at exit >> arch/arm64/include/asm/current.h:19:9: sparse: sparse: context imbalance in 'SPINLOCK_in_SOFTIRQ' - wrong count at exit lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_RCU' - wrong count at exit lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_RCU_BH' - wrong count at exit lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_RCU_CALLBACK' - wrong count at exit lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_RCU_SCHED' - wrong count at exit lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_RAW_SPINLOCK' - wrong count at exit lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_SPINLOCK' - wrong count at exit lib/locking-selftest.c:2575:1: sparse: sparse: context imbalance in 'SPINLOCK_in_MUTEX' - wrong count at exit lib/locking-selftest.c:2576:1: sparse: sparse: context imbalance in 'MUTEX_in_RCU' - wrong count at exit lib/locking-selftest.c:2576:1: sparse: sparse: context imbalance in 'MUTEX_in_RCU_BH' - wrong count at exit lib/locking-selftest.c:2576:1: sparse: sparse: context imbalance in 'MUTEX_in_RCU_SCHED' - wrong count at exit lib/locking-selftest.c:2576:1: sparse: sparse: context imbalance in 'MUTEX_in_RAW_SPINLOCK' - wrong count at exit lib/locking-selftest.c:2576:1: sparse: sparse: context imbalance in 'MUTEX_in_SPINLOCK' - wrong count at exit vim +/RAW_SPINLOCK_in_HARDIRQ +19 arch/arm64/include/asm/current.h c02433dd6de32f Mark Rutland 2016-11-03 10 9d84fb27fa135c Mark Rutland 2017-01-03 11 /* 9d84fb27fa135c Mark Rutland 2017-01-03 12 * We don't use read_sysreg() as we want the compiler to cache the value where 9d84fb27fa135c Mark Rutland 2017-01-03 13 * possible. 9d84fb27fa135c Mark Rutland 2017-01-03 14 */ c02433dd6de32f Mark Rutland 2016-11-03 15 static __always_inline struct task_struct *get_current(void) c02433dd6de32f Mark Rutland 2016-11-03 16 { 9d84fb27fa135c Mark Rutland 2017-01-03 17 unsigned long sp_el0; 9d84fb27fa135c Mark Rutland 2017-01-03 18 9d84fb27fa135c Mark Rutland 2017-01-03 @19 asm ("mrs %0, sp_el0" : "=r" (sp_el0)); 9d84fb27fa135c Mark Rutland 2017-01-03 20 9d84fb27fa135c Mark Rutland 2017-01-03 21 return (struct task_struct *)sp_el0; c02433dd6de32f Mark Rutland 2016-11-03 22 } c02433dd6de32f Mark Rutland 2016-11-03 23 :::::: The code at line 19 was first introduced by commit :::::: 9d84fb27fa135c99c9fe3de33628774a336a70a8 arm64: restore get_current() optimisation :::::: TO: Mark Rutland :::::: CC: Catalin Marinas --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org