From: Jules Irenge <jbi.octave@gmail.com>
Date: Sun, 23 Feb 2020 23:16:42 +0000 (+0000)
Subject: btrfs: Add missing lock annotation for release_extent_buffer()
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=5ce48d0f0e2656050a68dc3dbbf0d7d1be862c99;p=openwrt%2Fstaging%2Fblogic.git

btrfs: Add missing lock annotation for release_extent_buffer()

Sparse reports a warning at release_extent_buffer()
warning: context imbalance in release_extent_buffer() - unexpected unlock

The root cause is the missing annotation at release_extent_buffer()
Add the missing __releases(&eb->refs_lock) annotation

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
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/extent_io.c b/fs/btrfs/extent_io.c
index 4f4b41c454f2..14b7007634b7 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -5276,6 +5276,7 @@ static inline void btrfs_release_extent_buffer_rcu(struct rcu_head *head)
 }
 
 static int release_extent_buffer(struct extent_buffer *eb)
+	__releases(&eb->refs_lock)
 {
 	lockdep_assert_held(&eb->refs_lock);