Subject: Re: [PATCH] drm/amdgpu: replace readq/writeq with atomic64 operations

From: "Koenig, Christian" <[email-masked]>
Date: Wed, 7 Aug 2019 08:53:25 +0000

Am 07.08.19 um 09:08 schrieb Christoph Hellwig:
> On Wed, Aug 07, 2019 at 10:56:40AM +0800, Tao Zhou wrote:
>> readq/writeq are not supported on all architectures
> NAK.  You must not use atomic_* on __iomem (MMIO) memory.

Well then what's the right thing to do here?

Essentially writeq/readq doesn't seems to be available on all 
architectures either.

Regards,
Christian.