Re: is avoiding compat ioctls possible?

David Miller
2009-10-28T12:16:09Z

From: Arnd Bergmann <arndbergmann@googlemail.com>
Date: Wed, 28 Oct 2009 13:13:32 +0100

> The ioctl argument actually needs a compat_ptr() conversion as well.
> For the s390 case, we can't do that in common code, because some
> ioctl methods put a 32 bit integer into the argument. Not sure if we
> want to fix that everywhere, the problem is very common and the
> impact is minimal.

What does s390 do with the 'arg' argument to sys_ioctl()?

That assumption that you can cast this to a pointer is everywhere.

If someone wants to fix this up, feel free to do an audit and go
over that seperately from my work :-)