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.
