[PATCH] f2fs: fix missing unlock(sbi->gc_mutex)

[Jaegeuk Kim]

This fixes missing unlock call.

Cc: <sta...@vger.kernel.org>
Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
---
 fs/f2fs/super.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index b79677639108..2689a2cb56cc 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1462,6 +1462,9 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info 
*sbi)
 
        while (!f2fs_time_over(sbi, DISABLE_TIME)) {
                err = f2fs_gc(sbi, true, false, NULL_SEGNO);
+
+               /* f2fs_gc guarantees unlock gc_mutex */
+               mutex_lock(&sbi->gc_mutex);
                if (err == -ENODATA)
                        break;
                if (err && err != -EAGAIN) {
-- 
2.19.0.605.g01d371f741-goog