linux-kernel - [PATCH -tip] remove the BKL: remove "BKL auto-drop" assumption from ext3

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Date:	Thu, 23 Apr 2009 15:16:26 +0200
From:	Alessio Igor Bogani <abogani@...ware.it>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Jonathan Corbet <corbet@....net>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>,
	Alessio Igor Bogani <abogani@...ware.it>
Subject: [PATCH -tip] remove the BKL: remove "BKL auto-drop" assumption from ext3_remount()

Fix ext3_remount()'s "schedule() drops the BKL automatically" assumption,
when ext3_mark_recovery_complete(), which can sleep, does not do that it can
lock up.

Signed-off-by: Alessio Igor Bogani <abogani@...ware.it>
---
 fs/ext3/super.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index dc905f9..3fa457a 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -2561,9 +2561,11 @@ static int ext3_remount (struct super_block * sb, int * flags, char * data)
 			 * We have to unlock super so that we can wait for
 			 * transactions.
 			 */
+			unlock_kernel();
 			unlock_super(sb);
 			ext3_mark_recovery_complete(sb, es);
 			lock_super(sb);
+			lock_kernel();
 		} else {
 			__le32 ret;
 			if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb,
-- 
1.6.0.4

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