From: Jaegeuk Kim Date: Fri, 25 Jul 2014 22:47:23 +0000 (-0700) Subject: f2fs: test before set/clear bits X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=61e0f2d0a5f2cddf7cd96fa8cb7fe53a1e5e325d;p=linux-beck.git f2fs: test before set/clear bits 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 --- diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 8f8685e16863..475f97ca49ae 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)