fix oops in fs/9p late mount failure
authorAl Viro <viro@zeniv.linux.org.uk>
Mon, 25 Jan 2010 11:16:19 +0000 (06:16 -0500)
committerAl Viro <viro@zeniv.linux.org.uk>
Wed, 27 Jan 2010 03:22:27 +0000 (22:22 -0500)
commit083c73c253c23c20359a344dfe1198ea628e6259
tree22f4f25627db5569f7ce78ef3b9270a828ae924a
parent7e32b7bb734047c5e3cecf2e896b9cf8fc35d1e8
fix oops in fs/9p late mount failure

if 9P ->get_sb() fails late (at root inode or root dentry
allocation), we'll hit its ->kill_sb() with NULL ->s_root

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
fs/9p/vfs_super.c