[PATCH -v2] f2fs: Remove lock from check_valid_map

[Huang Ying]

Only one bit is read in check_valid_map, holding a lock to do that
doesn't help anything except decreasing performance.

Signed-off-by: Huang, Ying <ying.huang@xxxxxxxxx>
---

v2: Fixed a build warning.

---
 fs/f2fs/gc.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -378,14 +378,11 @@ static void put_gc_inode(struct list_hea
 static int check_valid_map(struct f2fs_sb_info *sbi,
 				unsigned int segno, int offset)
 {
-	struct sit_info *sit_i = SIT_I(sbi);
 	struct seg_entry *sentry;
 	int ret;
 
-	mutex_lock(&sit_i->sentry_lock);
 	sentry = get_seg_entry(sbi, segno);
 	ret = f2fs_test_bit(offset, sentry->cur_valid_map);
-	mutex_unlock(&sit_i->sentry_lock);
 	return ret;
 }
 
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