To: Arnd Bergmann <arnd@arndb.de>
References: <20170622164817.25515-1-logang@deltatee.com>
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 <CAK8P3a1Uh=PQbGi540KGLpkoEVH+KUW18mzqN3aiijroXwEMWQ@mail.gmail.com>
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        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Suresh Warrier <warrier@linux.vnet.ibm.com>,
        Nicholas Piggin <npiggin@gmail.com>
From: Logan Gunthorpe <logang@deltatee.com>
Message-ID: <0746dbb0-9fc1-d24c-89c0-b079a3cd0c7b@deltatee.com>
Date: Mon, 26 Jun 2017 15:25:41 -0600
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Subject: Re: [PATCH 2/7] iomap: implement ioread64 and iowrite64
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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