linux-kernel - Re: [PATCH 1/2] asm-generic/io: Pass result on inX() accessor to __io

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Date:   Wed, 13 Feb 2019 21:59:28 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Will Deacon <will.deacon@....com>
Cc:     linux-arch <linux-arch@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        andrew.murray@....com, Catalin Marinas <catalin.marinas@....com>,
        linux-riscv@...ts.infradead.org,
        Palmer Dabbelt <palmer@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>
Subject: Re: [PATCH 1/2] asm-generic/io: Pass result on inX() accessor to __io_par()

On Wed, Feb 13, 2019 at 6:46 PM Will Deacon <will.deacon@....com> wrote:

> On Tue, Feb 12, 2019 at 12:55:17PM +0100, Arnd Bergmann wrote:
>
> > For all I can see, this should not conflict with the usage of the
> > same macros on RISC-V, though it does make add a significant
> > difference, so I'd like to see an Ack from the RISC-V folks as
> > well (added to Cc), or possibly a change to arch/riscv/include/asm/io.h
> > to do a corresponding change.
>
> There's already a comment in that header which says that the accesses are
> ordered wrt timer reads, so I don't think anything needs to change there.
> For consistency with the macro arguments, I could augment their __io_par to
> take the read value as an unused argument, if that's what you mean?

Yes, that's what I meant, I should have been clearer there.

     Arnd