[PATCH] restore sane ->umount_begin() API
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/namespace.c b/fs/namespace.c
index 0505fb6..f48f981 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1061,10 +1061,11 @@
* about for the moment.
*/
- lock_kernel();
- if (sb->s_op->umount_begin)
- sb->s_op->umount_begin(mnt, flags);
- unlock_kernel();
+ if (flags & MNT_FORCE && sb->s_op->umount_begin) {
+ lock_kernel();
+ sb->s_op->umount_begin(sb);
+ unlock_kernel();
+ }
/*
* No sense to grab the lock for this test, but test itself looks