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| author | Wang Shilong <wangsl-fnst@cn.fujitsu.com> | 2013-01-12 01:36:17 -0800 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2013-01-21 11:19:57 +0100 |
| commit | 1b7d76e9b1106f2be062f915b05d47658dd4fc63 (patch) | |
| tree | 986543d21d3b870c54bd9e3280c7ec85fc4384db /fs/ext3/inode.c | |
| parent | 2b0542a4a0d9b8cb98e64fc87c5e31d130029a92 (diff) | |
| download | linux-stable-1b7d76e9b1106f2be062f915b05d47658dd4fc63.tar.gz linux-stable-1b7d76e9b1106f2be062f915b05d47658dd4fc63.tar.bz2 linux-stable-1b7d76e9b1106f2be062f915b05d47658dd4fc63.zip | |
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>
Diffstat (limited to 'fs/ext3/inode.c')
| -rw-r--r-- | fs/ext3/inode.c | 6 |
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; /* |