From: Jules Irenge <jbi.octave@gmail.com>
Date: Tue, 31 Mar 2020 20:46:42 +0000 (+0100)
Subject: btrfs: add missing annotation for btrfs_tree_lock()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=78d933c79cb649906577715af15400c7724ca633;p=linux.git

btrfs: add missing annotation for btrfs_tree_lock()

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>
---

diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c
index fb647d8cf5270..f75612e18a82f 100644
--- a/fs/btrfs/locking.c
+++ b/fs/btrfs/locking.c
@@ -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;