linux-kernel - [PATCH 1/5 -tip] 9p: umount

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Date:	Thu, 23 Apr 2009 21:12:01 +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>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	LFSDEV <linux-fsdevel@...r.kernel.org>,
	Alessio Igor Bogani <abogani@...ware.it>
Subject: [PATCH 1/5 -tip] 9p: umount_begin BKL pushdown

Signed-off-by: Alessio Igor Bogani <abogani@...ware.it>
---
 fs/9p/vfs_super.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 5f8ab8a..2f64462 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -37,6 +37,7 @@
 #include <linux/mount.h>
 #include <linux/idr.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <net/9p/9p.h>
 #include <net/9p/client.h>
 
@@ -232,7 +233,9 @@ v9fs_umount_begin(struct super_block *sb)
 {
 	struct v9fs_session_info *v9ses = sb->s_fs_info;
 
+	lock_kernel();
 	v9fs_session_cancel(v9ses);
+	unlock_kernel();
 }
 
 static const struct super_operations v9fs_super_ops = {
-- 
1.6.0.4

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