From 67e55205ec55cc7899f1d783f217961596798419 Mon Sep 17 00:00:00 2001
From: Alessio Igor Bogani <abogani@texware.it>
Date: Fri, 24 Apr 2009 09:06:53 +0200
Subject: vfs: umount_begin BKL pushdown

Push BKL down into ->umount_begin()

Signed-off-by: Alessio Igor Bogani <abogani@texware.it>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/9p/vfs_super.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'fs/9p')

diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 5f8ab8adb5f5..7d23214e5599 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>
 
@@ -230,9 +231,12 @@ static int v9fs_show_options(struct seq_file *m, struct vfsmount *mnt)
 static void
 v9fs_umount_begin(struct super_block *sb)
 {
-	struct v9fs_session_info *v9ses = sb->s_fs_info;
+	struct v9fs_session_info *v9ses;
 
+	lock_kernel();
+	v9ses = sb->s_fs_info;
 	v9fs_session_cancel(v9ses);
+	unlock_kernel();
 }
 
 static const struct super_operations v9fs_super_ops = {
-- 
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