In case of non-modular kernels the root filesystem is mounted by trying
several filesystems. If ocfs2 was tried before the actual filesystem
type, the mount would fail because ocfs2_sb_probe() returns -EAGAIN
instead of -EINVAL.  ocfs2 will now return -EINVAL properly.
Signed-off-by: NJoel Becker <joel.becker@oracle.com>
Reported-by: NLaszlo Attila Toth <panther@balabit.hu>