Re: [PATCH v4 04/47] soc: fsl: qe: introduce qe_io{read,write}* wrappers

[Timur Tabi]

On Fri, Nov 8, 2019 at 7:03 AM Rasmus Villemoes
<linux@xxxxxxxxxxxxxxxxxx> wrote:
>
> The QUICC engine drivers use the powerpc-specific out_be32() etc. In
> order to allow those drivers to build for other architectures, those
> must be replaced by iowrite32be(). However, on powerpc, out_be32() is
> a simple inline function while iowrite32be() is out-of-line. So in
> order not to introduce a performance regression on powerpc when making
> the drivers work on other architectures, introduce qe_io* helpers.

Isn't it also true that iowrite32be() assumes a little-endian platform
and always does a byte swap?