diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 3e80bd6..eafaf72 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1167,6 +1167,7 @@
 	curseg = CURSEG_I(sbi, type);
 
 	mutex_lock(&curseg->curseg_mutex);
+	mutex_lock(&sit_i->sentry_lock);
 
 	/* direct_io'ed data is aligned to the segment for better performance */
 	if (direct_io && curseg->next_blkoff)
@@ -1181,7 +1182,6 @@
 	 */
 	__add_sum_entry(sbi, type, sum);
 
-	mutex_lock(&sit_i->sentry_lock);
 	__refresh_next_blkoff(sbi, curseg);
 
 	stat_inc_block_count(sbi, curseg);