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authorJaegeuk Kim <jaegeuk@kernel.org>2014-07-25 15:47:23 -0700
committerJaegeuk Kim <jaegeuk@kernel.org>2014-07-30 14:13:35 -0700
commit61e0f2d0a5f2cddf7cd96fa8cb7fe53a1e5e325d (patch)
tree3c1cc4497995df3c37b979b3b46c9b589db75b4d /fs/f2fs
parent01229f5e1b21b378863c91f8c653bbd8e593858c (diff)
downloadop-kernel-dev-61e0f2d0a5f2cddf7cd96fa8cb7fe53a1e5e325d.zip
op-kernel-dev-61e0f2d0a5f2cddf7cd96fa8cb7fe53a1e5e325d.tar.gz
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 <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/f2fs.h6
1 files 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)
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