From 552fca4cbe552520d85b21e839f289c880fa48d2 Mon Sep 17 00:00:00 2001
From: Nikita Danilov <nikita@clusterfs.com>
Date: Sun, 1 May 2005 08:58:39 -0700
Subject: [PATCH] [PATCH] mpage_writepages() page locking fix

When ->writepage() returns WRITEPAGE_ACTIVATE, the page is still locked.
Explicitly unlock the page in mpage_writepages().

Signed-off-by: Nikita Danilov <nikita@clusterfs.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 fs/mpage.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/mpage.c b/fs/mpage.c
index e7d8d1a77606..3923facf94eb 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -727,6 +727,8 @@ retry:
 						&last_block_in_bio, &ret, wbc,
 						writepage_fn);
 			}
+			if (unlikely(ret == WRITEPAGE_ACTIVATE))
+				unlock_page(page);
 			if (ret || (--(wbc->nr_to_write) <= 0))
 				done = 1;
 			if (wbc->nonblocking && bdi_write_congested(bdi)) {
-- 
2.20.1