[PATCH] ext4: Use IS_ERR_OR_NULL() helper function

[Xichao Zhao]

Use the IS_ERR_OR_NULL() helper instead of open-coding a NULL and 
an error pointer checks to simplify the code and improve readability.

Signed-off-by: Xichao Zhao <zhao.xichao@xxxxxxxx>
---
 fs/ext4/namei.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index d83f91b62317..7dff0dc70d0c 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -723,7 +723,7 @@ struct stats dx_show_entries(struct dx_hash_info *hinfo, struct inode *dir,
 		struct stats stats;
 		printk("%s%3u:%03u hash %8x/%8x ",levels?"":"   ", i, block, hash, range);
 		bh = ext4_bread(NULL,dir, block, 0);
-		if (!bh || IS_ERR(bh))
+		if (IS_ERR_OR_NULL(bh))
 			continue;
 		stats = levels?
 		   dx_show_entries(hinfo, dir, ((struct dx_node *) bh->b_data)->entries, levels - 1):
-- 
2.34.1