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| author | Chao Yu <chao2.yu@samsung.com> | 2013-12-05 17:15:22 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-12-23 10:18:06 +0900 |
| commit | cfb271d485d0ec31eb92b51f4fbe54bf6542e8e6 (patch) | |
| tree | 1565b575545b152af61ba0a18c2860070bd69348 /fs/f2fs/segment.h | |
| parent | b9987a277f1ec9dba203d04c3a20d967c01a1fba (diff) | |
| download | talos-obmc-linux-cfb271d485d0ec31eb92b51f4fbe54bf6542e8e6.tar.gz talos-obmc-linux-cfb271d485d0ec31eb92b51f4fbe54bf6542e8e6.zip | |
f2fs: add unlikely() macro for compiler optimization
As we know, some of our branch condition will rarely be true. So we could add
'unlikely' to let compiler optimize these code, by this way we could drop
unneeded 'jump' assemble code to improve performance.
change log:
o add *unlikely* as many as possible across the whole source files at once
suggested by Jaegeuk Kim.
Suggested-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/segment.h')
| -rw-r--r-- | fs/f2fs/segment.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h index 26812fc0fa12..ea563760f4b7 100644 --- a/fs/f2fs/segment.h +++ b/fs/f2fs/segment.h @@ -457,7 +457,7 @@ static inline bool has_not_enough_free_secs(struct f2fs_sb_info *sbi, int freed) int node_secs = get_blocktype_secs(sbi, F2FS_DIRTY_NODES); int dent_secs = get_blocktype_secs(sbi, F2FS_DIRTY_DENTS); - if (sbi->por_doing) + if (unlikely(sbi->por_doing)) return false; return ((free_sections(sbi) + freed) <= (node_secs + 2 * dent_secs + |
