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    SubjectRe: kdevtmpfs oops since yesterdays vfs merge
    On Sun, Jul 24, 2011 at 07:40:29PM -0400, Dave Jones wrote:
    > On Mon, Jul 25, 2011 at 12:28:12AM +0100, Al Viro wrote:
    > > On Sun, Jul 24, 2011 at 07:17:01PM -0400, Dave Jones wrote:
    > > > I see an oops in handle_create when I try to boot current tree..
    > > >
    > > > full trace:
    > > > https://s3.amazonaws.com/twitpic/photos/large/355006460.jpg?AWSAccessKeyId=AKIAJF3XCCKACR3QDMOA&Expires=1311550232&Signature=IIO%2Bya1uEDJzSXTD0DXh2%2BdZpoU%3D
    > >
    > > Where in handle_create() is that? At least dump objdump -d of your
    > > devtmpfs.o someplace readable...
    >
    > http://codemonkey.org.uk/devtmpfs.s

    Smells like req->dev somehow managing to be NULL at that point, but that
    doesn't make any sense - we get to devtmpfs_create_node() only from one
    place, it sets req.dev to the argument it got from callers and that caller
    would have oopsed itself before getting to that call with dev == NULL...

    Could you stick a BUG_ON(!dev) in the beginning of handle_create() to see
    if that's what somehow manages to happen?


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