oops in fs_may_remount_ro()

[Shaya Potter <spotter@yucs.org>]

I'm somehow causing an oops in fs_may_remount_ro() (triggered by
rebooting when it tries to remount / ) in that the list of files off the
superblock either points to an invalid entry of some sort.  It's either
invalid because the dentry is null, or because it doesn't exist 
evidence seems to point in the not existent direction, as I stuck in an 

if (!dentry)
{
	printk("bad dentry\n");
	continue;
}

in the loop, and it went nuts printing out data.  I dont know enough
about this, so trying to figure out what could cause this problem?  The
only things I modify are tty device related, so shouldn't have any
affect on the ext3 root (well seen w/ both an ext3 based /dev and a
devfs based dev)

anyways, any help/ideas/pointers would be appreciated.

thanks,

shaya