zsmalloc: Delete an unnecessary check before the function call “iput”

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

iput() 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.

Link: http://lkml.kernel.org/r/559cf499-4a01-25f9-c87f-24d906626a57@users.sourceforge.net
Signed-off-by: Markus Elfring 
Reviewed-by: Sergey Senozhatsky 
Acked-by: Minchan Kim 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 

---
 mm/zsmalloc.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
 
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index cd2a81e..b0bc023 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -2174,8 +2174,7 @@ static int zs_register_migration(struct zs_pool *pool)
 static void zs_unregister_migration(struct zs_pool *pool)
 {
 	flush_work(&pool->free_work);
-	if (pool->inode)
-		iput(pool->inode);
+	iput(pool->inode);
 }
 
 /*