f2fs: implement a lock-free stat_show

The stat_show is just to show the current status of f2fs.
So, we can remove all the there-in locks.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 3 insertions, 24 deletions

diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index 4024546b6361..c3d5e3689ffc 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -380,26 +380,12 @@ static inline void get_sit_bitmap(struct f2fs_sb_info *sbi,
 
 static inline block_t written_block_count(struct f2fs_sb_info *sbi)
 {
-        struct sit_info *sit_i = SIT_I(sbi);
-        block_t vblocks;
-
-        mutex_lock(&sit_i->sentry_lock);
-        vblocks = sit_i->written_valid_blocks;
-        mutex_unlock(&sit_i->sentry_lock);
-
-        return vblocks;
+        return SIT_I(sbi)->written_valid_blocks;
 }
 
 static inline unsigned int free_segments(struct f2fs_sb_info *sbi)
 {
-        struct free_segmap_info *free_i = FREE_I(sbi);
-        unsigned int free_segs;
-
-        read_lock(&free_i->segmap_lock);
-        free_segs = free_i->free_segments;
-        read_unlock(&free_i->segmap_lock);
-
-        return free_segs;
+        return FREE_I(sbi)->free_segments;
 }
 
 static inline int reserved_segments(struct f2fs_sb_info *sbi)
@@ -409,14 +395,7 @@ static inline int reserved_segments(struct f2fs_sb_info *sbi)
 
 static inline unsigned int free_sections(struct f2fs_sb_info *sbi)
 {
-        struct free_segmap_info *free_i = FREE_I(sbi);
-        unsigned int free_secs;
-
-        read_lock(&free_i->segmap_lock);
-        free_secs = free_i->free_sections;
-        read_unlock(&free_i->segmap_lock);
-
-        return free_secs;
+        return FREE_I(sbi)->free_sections;
 }
 
 static inline unsigned int prefree_segments(struct f2fs_sb_info *sbi)