Ext2: use unlikely to improve the efficiency of the kernel

Because the function 'sb_getblk' seldomly fails to return
NULL value. It will be better to use unlikely to optimize it.

Signed-off-by: Wang shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Jan Kara <jack@suse.cz>

2 files changed, 2 insertions, 2 deletions

diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index fa04d023177e..7f68c8114026 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1500,7 +1500,7 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
                         bh = sb_bread(sb, tmp_bh.b_blocknr);
                 else
                         bh = sb_getblk(sb, tmp_bh.b_blocknr);
-                if (!bh) {
+                if (unlikely(!bh)) {
                         err = -EIO;
                         goto out;
                 }
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index b6754dbbce3c..06209ec46152 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -662,7 +662,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh,
                         ea_idebug(inode, "creating block %d", block);
 
                         new_bh = sb_getblk(sb, block);
-                        if (!new_bh) {
+                        if (unlikely(!new_bh)) {
                                 ext2_free_blocks(inode, block, 1);
                                 mark_inode_dirty(inode);
                                 error = -EIO;