Re: [xen] double fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC

[Dave Airlie]

 > Damn gmail screwed up my reply-all,
>
> anyhoo I get the feeling I'd rather do this like fbdev does and stop using
> an embedded kdev for this if I can. The lifetime of the minor and the sysfs
> objects aren't necessarily that tied together esp with hot unplug of
> USB devices.
>
> e.g. when a USB device goes away I don't want the sysfs files to
> remain hanging around,
> or the userspace device nodes, however I can't remove all the internal
> driver state until userspace finally closes all open device
> files,
>
> I think this is a bit of a bad misdesign of the whole device api that
> sysfs exposure and device exposure is tied
> to objects you are encourgaged to embed.
>
> I think maybe I'll just copy fbdev and do a separate device_create
> with a nonembedded dev.
>

Okay it compiles but not boot tested yet.,attached as well just in
case gmail eats it.