Re: compat ioctl32 for /dev/snapshot?

[Andi Kleen <andi@firstfloor.org>]

On Mon, May 04, 2009 at 02:55:10PM +0400, Michael Tokarev wrote:
> Andi Kleen wrote:
> >Michael Tokarev <mjt@tls.msk.ru> writes:
> >
> >>Is there any reason why 32-bit uswsusp &Friends does not work
> >>on 64bits kernel?
> >>
> >>For one, 32bits s2disk produces the following when trying to
> >>suspend:
> >>
> >> ioctl32(s2disk:4134): Unknown cmd fd(4) cmd(400c330d){t:'3';sz:12} 
> >> arg(ff853554) on /dev/snapshot
> >> ioctl32(s2disk:4134): Unknown cmd fd(4) cmd(4004330a){t:'3';sz:4} 
> >> arg(00000805) on /dev/snapshot
> >>
> []
> >It's probably just that nobody has written the code yet. In general all
> >missing compat_ioctls are bugs.
> 
> Oh well.
> 
> Is the following patch ok?  I just pulled all the SNAPSHOT_* stuff from

You should ask Rafael (cc'ed) who maintains that code.
> 
> I can't test it so far, because uswsusp tools are broken in mixed
> 32/64bit case in other places.  But at least it compiles fine and
> does not complain anymore.

It would be good to test before merging.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.