[PATCH 08/10] drm/radeon: replace pflip and sw_int counters with atomics

[Dave Airlie]

On Thu, May 24, 2012 at 1:53 PM, Dave Airlie <airlied at gmail.com> wrote:
> On Thu, May 24, 2012 at 1:46 PM, Sylvain BERTRAND <sylware at legeek.net> wrote:
>>>> Does the linux API mandates atomic_t to be a 32bits word?
>>>
>>> AFAIK it is, at least for the platforms we care about.
>>> ...
>>
>> Then, the proper course of action would be to add to the linux API, sized
>> atomic operation first, wouldn't it?
>>
>
> No, atomic is fine for this, I think only sparc32 had 24-bit atomics,
> and if you can get sparc32 + a radeon,
> then you can keep both halves.

And even that is a lie now :-)

http://lwn.net/Articles/71732/

Dave.