Re: [PATCH 2/7] iomap: implement ioread64 and iowrite64

Logan Gunthorpe
2017-06-26T21:26:05Z

On 6/26/2017 2:43 PM, Arnd Bergmann wrote:
> This hardcodes the behavior of include/linux/io-64-nonatomic-hi-lo.h, which
> I find rather confusing, as only about one in five drivers wants this
> behavior.
>
> I'd suggest you don't add it in lib/iomap.c at all for 32-bit architectures,
> but rather use the same logic that we have for readq/writeq in
> io-64-nonatomic-hi-lo.h and io-64-nonatomic-lo-hi.h, adding
> {lo_hi,hi_lo}_{ioread,iowrite}{,be} to the same files, and provide
> the {ioread,iowrite}{,be} macros only if they have not been defined
> at that point.

Thanks Arnd. Yes, I'm already reworking this patchset to do exactly that.

Logan