[PATCH] fixup! signal: factor copy_siginfo_to_external32 from copy_siginfo_to_user32

[Christoph Hellwig]

On Wed, Apr 29, 2020 at 08:17:22AM +0200, Christophe Leroy wrote:
>>   +#ifndef CONFIG_X86_X32_ABI
>
> Can it be declared __weak instead of enclosing it in an #ifndef ?

I really hate the __weak ifdefs.  But my plan was to move to a
CONFIG_ARCH_COPY_SIGINFO_TO_USER32 and have x86 select it.