Ext3: 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 check it.

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

1 files changed, 3 insertions, 3 deletions

diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index 6e4f8a529fbc..d7df06839f6a 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1082,7 +1082,7 @@ struct buffer_head *ext3_getblk(handle_t *handle, struct inode *inode,
         if (!err && buffer_mapped(&dummy)) {
                 struct buffer_head *bh;
                 bh = sb_getblk(inode->i_sb, dummy.b_blocknr);
-                if (!bh) {
+                if (unlikely(!bh)) {
                         *errp = -EIO;
                         goto err;
                 }
@@ -2733,7 +2733,7 @@ static int __ext3_get_inode_loc(struct inode *inode,
                 return -EIO;
 
         bh = sb_getblk(inode->i_sb, block);
-        if (!bh) {
+        if (unlikely(!bh)) {
                 ext3_error (inode->i_sb, "ext3_get_inode_loc",
                                 "unable to read inode block - "
                                 "inode=%lu, block="E3FSBLK,
@@ -2787,7 +2787,7 @@ static int __ext3_get_inode_loc(struct inode *inode,
 
                         bitmap_bh = sb_getblk(inode->i_sb,
                                         le32_to_cpu(desc->bg_inode_bitmap));
-                        if (!bitmap_bh)
+                        if (unlikely(!bitmap_bh))
                                 goto make_io;
 
                         /*