tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: da2968ff879b9e74688cdc658f646971991d2c56 commit: fbdc8f0f4891df7b5eb643ec0a509a4ac7dcfc2e parisc: Rework arch_rw locking functions date: 5 months ago config: parisc-randconfig-s032-20200820 (attached as .config) compiler: hppa-linux-gcc (GCC) 9.3.0 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: v0.6.2-191-g10164920-dirty git checkout fbdc8f0f4891df7b5eb643ec0a509a4ac7dcfc2e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=parisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) fs/btrfs/locking.c: note: in included file (through arch/parisc/include/uapi/asm/unistd.h, arch/parisc/include/asm/unistd.h, include/uapi/linux/unistd.h, ...): ./arch/parisc/include/generated/uapi/asm/unistd_32.h:382:41: sparse: sparse: no newline at end of file fs/btrfs/locking.c: note: in included file (through include/linux/spinlock_api_smp.h, include/linux/spinlock.h, include/linux/wait.h, ...): include/linux/rwlock_api_smp.h:226:9: sparse: sparse: context imbalance in 'btrfs_set_lock_blocking_read' - unexpected unlock fs/btrfs/locking.c:247:6: sparse: sparse: context imbalance in 'btrfs_tree_read_lock' - different lock contexts for basic block fs/btrfs/locking.c:288:5: sparse: sparse: context imbalance in 'btrfs_tree_read_lock_atomic' - different lock contexts for basic block fs/btrfs/locking.c:310:5: sparse: sparse: context imbalance in 'btrfs_try_tree_read_lock' - different lock contexts for basic block fs/btrfs/locking.c:335:5: sparse: sparse: context imbalance in 'btrfs_try_tree_write_lock' - different lock contexts for basic block include/linux/rwlock_api_smp.h:226:9: sparse: sparse: context imbalance in 'btrfs_tree_read_unlock' - unexpected unlock fs/btrfs/locking.c:412:6: sparse: sparse: context imbalance in 'btrfs_tree_lock' - wrong count at exit # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout fbdc8f0f4891df7b5eb643ec0a509a4ac7dcfc2e vim +/btrfs_set_lock_blocking_write +219 include/linux/rwlock_api_smp.h 6b6b4792f89346e Thomas Gleixner 2009-11-16 215 9c1721aa4994f66 Thomas Gleixner 2009-12-03 216 static inline void __raw_write_unlock(rwlock_t *lock) 6b6b4792f89346e Thomas Gleixner 2009-11-16 217 { 5facae4f3549b5c Qian Cai 2019-09-19 218 rwlock_release(&lock->dep_map, _RET_IP_); 9828ea9d75c38fe Thomas Gleixner 2009-12-03 @219 do_raw_write_unlock(lock); 6b6b4792f89346e Thomas Gleixner 2009-11-16 220 preempt_enable(); 6b6b4792f89346e Thomas Gleixner 2009-11-16 221 } 6b6b4792f89346e Thomas Gleixner 2009-11-16 222 :::::: The code at line 219 was first introduced by commit :::::: 9828ea9d75c38fe3dce05d00566eed61c85732e6 locking: Further name space cleanups :::::: TO: Thomas Gleixner <tglx(a)linutronix.de&gt; :::::: CC: Thomas Gleixner <tglx(a)linutronix.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org