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btrfs: add missing annotation for btrfs_tree_lock()

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Sparse reports a warning at btrfs_tree_lock()

warning: context imbalance in btrfs_tree_lock() - wrong count at exit

The root cause is the missing annotation at btrfs_tree_lock()
Add the missing __acquires(&eb->lock) annotation

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Jules Irenge 2020-03-31 21:46:42 +01:00 committed by David Sterba
parent c142c6a449
commit 78d933c79c
1 changed files with 1 additions and 0 deletions
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fs/btrfs/locking.c
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@ -410,6 +410,7 @@ void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
* The rwlock is held for write upon exit.
*/
void btrfs_tree_lock(struct extent_buffer *eb)
__acquires(&eb->lock)
{
u64 start_ns = 0;