Re: x86-64: Maintain 16-byte stack alignment

[Linus Torvalds]

On Tue, Jan 10, 2017 at 6:39 AM, Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote:
>
> BTW this is with Debian gcc 4.7.2 which does not allow an 8-byte
> stack alignment as attempted by the Makefile:

I'm pretty sure we have random asm code that may not maintain a
16-byte stack alignment when it calls other code (including, in some
cases, calling C code).

So I'm not at all convinced that this is a good idea. We shouldn't
expect 16-byte alignment to be something trustworthy.

                 Linus