ext4: Remove an unnecessary check for NULL before iput()

Author: Markus Elfring <elfring@users.sourceforge.net>

The iput() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring 
Signed-off-by: Theodore Ts'o 
 fs/ext4/mballoc.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index f1c25f8..8d1e602 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2712,8 +2712,7 @@ int ext4_mb_release(struct super_block *sb)
-	if (sbi->s_buddy_cache)
-		iput(sbi->s_buddy_cache);
+	iput(sbi->s_buddy_cache);
 	if (sbi->s_mb_stats) {
 		ext4_msg(sb, KERN_INFO,
 		       "mballoc: %u blocks %u reqs (%u success)",