linux says it is a bug

[Richard Biener]

On Tue, Mar 4, 2014 at 1:01 PM, Hans-Peter Nilsson <hp@bitrange.com> wrote:
> On Tue, 4 Mar 2014, Yury Gribov wrote:
>> Richard wrote:
>> > volatile __asm__("":::"memory")
>> >
>> > is a memory barrier and a barrier for other volatile instructions.
>>
>> AFAIK asm without output arguments is implicitly marked as volatile. So it may
>> not be needed in barrier() at all.
>
> Yes, exactly.  Had it at some time been needed, that'd be a bug.
> (I have a faint recollection of that, faint enough to be a false
> memory.)

Ah, indeed.

> brgds, H-P