From: Liu Bo <bo.liu@linux.alibaba.com>
Date: Fri, 18 May 2018 03:00:24 +0000 (+0800)
Subject: Btrfs: remove always true check in unlock_up
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=d80bb3f905ccf70b2c4dde541cff7286e6f936e8;p=openwrt%2Fstaging%2Fblogic.git

Btrfs: remove always true check in unlock_up

As unlock_up() is written as

for () {
   if (!path->locks[i])
       break;
   ...
   if (... && path->locks[i]) {
   }
}

Apparently, @path->locks[i] is always true at this 'if'.

Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 239682330929..973912ec8992 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2330,7 +2330,7 @@ static noinline void unlock_up(struct btrfs_path *path, int level,
 			no_skips = 1;
 
 		t = path->nodes[i];
-		if (i >= lowest_unlock && i > skip_level && path->locks[i]) {
+		if (i >= lowest_unlock && i > skip_level) {
 			btrfs_tree_unlock_rw(t, path->locks[i]);
 			path->locks[i] = 0;
 			if (write_lock_level &&