linux-kernel - Re: [PATCH] alpha: provide ioread64 and iowrite64 implementations

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Message-ID: <787b4be1-ce9e-6838-27b6-0cd9f8d7805f@twiddle.net>
Date:   Sat, 24 Jun 2017 08:25:30 -0700
From:   Richard Henderson <rth@...ddle.net>
To:     Logan Gunthorpe <logang@...tatee.com>, linux-kernel@...r.kernel.org
Cc:     linux-alpha@...r.kernel.org, linux-arch@...r.kernel.org,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>
Subject: Re: [PATCH] alpha: provide ioread64 and iowrite64 implementations

On 06/24/2017 08:19 AM, Logan Gunthorpe wrote:
> Hey,
> 
> On 24/06/17 09:13 AM, Richard Henderson wrote:
>> All Alpha hosts except for Jensen provide 64-bit I/O operations.
>>
>> Jensen is EISA only, so there ought not be any devices that even
>> attempt such operations.  But just in case, use 2 32-bit operations.
> 
> Thanks for this, Richard.
> 
> However, I was recently enlightened by the existence of the
> linux/io-64-nonatomic* headers. This is where the 2 32-bit operation
> functions belong. So you should probably remove them from this patch and
> let drivers that need them just include those headers.

This has nothing to do with drivers.

This is all about providing 64-bit operations for the 99.999% of alphas that do 
have them.


r~