Re: [PATCH] x86: work around clang IAS bug referencing __force_order

[Thomas Gleixner]

On Fri, Aug 21 2020 at 16:16, Nick Desaulniers wrote:
> On Fri, Aug 21, 2020 at 4:04 PM Arvind Sankar <nivedita@xxxxxxxxxxxx> wrote:
>> On Fri, Aug 21, 2020 at 02:37:48AM +0200, Thomas Gleixner wrote:
>> The gcc bug I linked to earlier is only fixed in gcc-6 onwards. Is that
>
> (based on https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82602#c14)
>
>> good enough to remove force_order? I can test gcc-4.9 and gcc-5 to check
>> if it would currently have any impact.

And that test tells you what exactly? That your particular build of
those compilers does not have the problem. A truly scientific approach.

> I think checking the disassemblies with a pre-gcc-6 would be good
> enough then; that bug isn't specific to this particular case.

What? I clearly want a statement from the GCC people that this won't
happen on pre gcc6 compilers and not just some 'works for me' statement
based on a randomly picked compiler build.

Thanks,

        tglx