Re: compat ioctl32 for /dev/snapshot?

[Michael Tokarev]

Arnd Bergmann wrote:
> On Monday 04 May 2009, Rafael J. Wysocki wrote:
> > In fact I don't think the 32-bit user space will work with 64-bit kernels as is
> > in this particular case, because of the different pointer size.
> >
> > Having a quick look at the code (I don't remember the details right now)
> > I think most probably it could be modified to handle this case too, but I'm not
> > really sure.
>
> I don't see anything in the snapshot code that passes pointers to the
> kernel, so why should the pointer size matter?

It's the userspace part (uswsusp).  In particular it parses swap
on-disk data structures.

But in any case, without compat_ioctl32 in kernel userspace part
can not be fixed.

/mjt
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