[josef-btrfs:locking-rework 16/18] include/trace/events/btrfs.h:2066:1: sparse: sparse: context imbalance in '__btrfs_tree_lock' - wrong count at exit

[josef-btrfs:locking-rework 16/18] include/trace/events/btrfs.h:2066:1: sparse: sparse: context imbalance in '__btrfs_tree_lock' - wrong count at exit

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 1964 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git locking-rework
head:   ecc26315fec63c1ce9a1420cb6d9b6e0d0c4d7f5
commit: 061e82bf86d54d981acb307eff1fa114e71c3854 [16/18] btrfs: change our extent buffer lock to a rw_semaphore
config: i386-randconfig-s002-20200810 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-141-g19506bc2-dirty
        git checkout 061e82bf86d54d981acb307eff1fa114e71c3854
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)

   fs/btrfs/locking.c: note: in included file (through fs/btrfs/ctree.h):
>> include/trace/events/btrfs.h:2066:1: sparse: sparse: context imbalance in '__btrfs_tree_lock' - wrong count at exit
   fs/btrfs/locking.c:217:6: sparse: sparse: context imbalance in 'btrfs_tree_lock' - wrong count at exit

vim +/__btrfs_tree_lock +2066 include/trace/events/btrfs.h

34e73cc930a867 Qu Wenruo 2019-04-15  2065  
34e73cc930a867 Qu Wenruo 2019-04-15 @2066  DEFINE_EVENT(btrfs_sleep_tree_lock, btrfs_tree_lock,
34e73cc930a867 Qu Wenruo 2019-04-15  2067  	TP_PROTO(const struct extent_buffer *eb, u64 start_ns),
34e73cc930a867 Qu Wenruo 2019-04-15  2068  
34e73cc930a867 Qu Wenruo 2019-04-15  2069  	TP_ARGS(eb, start_ns)
34e73cc930a867 Qu Wenruo 2019-04-15  2070  );
34e73cc930a867 Qu Wenruo 2019-04-15  2071  

:::::: The code at line 2066 was first introduced by commit
:::::: 34e73cc930a8677426c9cbffdd3421e18f32e79f btrfs: trace: Introduce trace events for sleepable tree lock

:::::: TO: Qu Wenruo <wqu@suse.com>
:::::: CC: David Sterba <dsterba@suse.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 35389 bytes --]