On Fri, Jan 26, 2018 at 10:07 AM, Al Viro <[email protected]> wrote:
>
> Umm... What about other architectures? Or do you want SYSCALL_DEFINE...
> to be per-arch? I wonder how much would that "go through pt_regs" hurt
> on something like sparc...
No, but I just talked to Will Deacon about register clearing on entry,
and so I suspect that arm64 might want something similar too.
So I think some opt-in for letting architectures add their own
function would be good. Because it wouldn't be all architectures, but
it probably _would_ be more than just x86.
You need to add architecture-specific "load argX from ptregs" macros anyway.
Linus
