vfs: umount_begin BKL pushdown

[pandora-kernel.git] / fs / 9p / vfs_super.c

diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 5f8ab8a..7d23214 100644 (file)
--- 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 = {