Re: [PATCH] alternative compat_ioctl table implementation
Ben Collins (bcollins@debian.org)
Fri, 2 May 2003 14:09:41 -0400
On Fri, May 02, 2003 at 07:59:02PM +0200, Arnd Bergmann wrote:
> I had some trouble making the 2.5.68bk implementation
> for compat_ioctl work on s390x because of a cross-compiling
> bug in gcc-2.95.
>
> This patch changes the way that the translation table
> is generated and solves the problem by replacing
> the assembler magic with linker magic.
>
> As a side effect, it adds type-checking for the handler
> functions and makes it possible to put COMPATIBLE_IOCTL()
> in places other than arch/*/kernel/ioctl32.c, e.g. next
> to the normal ioctl handler.
>
> This needs the compat-ioctl-fix.patch from 2.5.68mm4.
>
You macros don't work for things like this:
COMPATIBLE_IOCTL(_IOW('v', BASE_VIDIOCPRIVATE+0, char [256]))
COMPATIBLE_IOCTL(_IOR('v', BASE_VIDIOCPRIVATE+1, char [256]))
...which are in compat_ioctl.h.
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