Messages in this thread Patch in this message | | | From | Jaegeuk Kim <> | Subject | [PATCH 09/11] f2fs: test before set/clear bits | Date | Fri, 25 Jul 2014 15:47:23 -0700 |
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If the bit is already set, we don't need to reset it, and vice versa. Because we don't need to make the caches dirty for that.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> --- fs/f2fs/f2fs.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 8f8685e..475f97c 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1003,7 +1003,8 @@ enum { static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag) { - set_bit(flag, &fi->flags); + if (!test_bit(flag, &fi->flags)) + set_bit(flag, &fi->flags); } static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag) @@ -1013,7 +1014,8 @@ static inline int is_inode_flag_set(struct f2fs_inode_info *fi, int flag) static inline void clear_inode_flag(struct f2fs_inode_info *fi, int flag) { - clear_bit(flag, &fi->flags); + if (test_bit(flag, &fi->flags)) + clear_bit(flag, &fi->flags); } static inline void set_acl_inode(struct f2fs_inode_info *fi, umode_t mode) -- 1.8.5.2 (Apple Git-48)
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