Re: [PATCH v4 04/47] soc: fsl: qe: introduce qe_io{read, write}* wrappers
From: Timur Tabi <timur@kernel.org>
Date: 2019-11-12 05:18:00
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linuxppc-dev, lkml
On Fri, Nov 8, 2019 at 7:03 AM Rasmus Villemoes [off-list ref] 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? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel