[PATCH 1/3] compat: lift compat_s64 and compat_u64 to <asm-generic/compat.h>

[Al Viro]

On Thu, Sep 17, 2020 at 09:41:57AM +0200, Christoph Hellwig wrote:
> lift the compat_s64 and compat_u64 definitions into common code using the
> COMPAT_FOR_U64_ALIGNMENT symbol for the x86 special case.

OK...  Unlike the previous series it's not trying to wean arm64 off the
direct includes of asm/compat.h, avoiding the breakage you've got there.

Looks sane, applied.