linux-kernel - [PATCH] f2fs: fix missing unlock(sbi->gc

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Date:   Mon, 17 Dec 2018 18:15:30 -0800
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net
Cc:     Jaegeuk Kim <jaegeuk@...nel.org>, stable@...r.kernel.org
Subject: [PATCH] f2fs: fix missing unlock(sbi->gc_mutex)

This fixes missing unlock call.

Cc: <stable@...r.kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.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