From: "Arnd Bergmann" <arnd@arndb.de>
To: Linus Walleij <linus.walleij@linaro.org>,
Richard Henderson <richard.henderson@linaro.org>,
Ivan Kokshaysky <ink@jurassic.park.msu.ru>,
Matt Turner <mattst88@gmail.com>
Cc: linux-alpha@vger.kernel.org, kernel test robot <lkp@intel.com>,
Mark Brown <broonie@kernel.org>,
Linux-Arch <linux-arch@vger.kernel.org>
Subject: Re: [PATCH v2] alpha: Use generic <asm-generic/io.h>
Date: Thu, 08 Sep 2022 16:52:42 +0200 [thread overview]
Message-ID: <67ecb725-2e2d-4aae-8c99-76fad5875080@www.fastmail.com> (raw)
In-Reply-To: <20220906185939.765081-1-linus.walleij@linaro.org>
On Tue, Sep 6, 2022, at 8:59 PM, Linus Walleij wrote:
> This enables the alpha to use <asm-generic/io.h> to fill in the
> missing (undefined) I/O accessor functions.
>
> This is needed if Alpha ever wants to uses CONFIG_REGMAP_MMIO
> which has been patches to use accelerated _noinc accessors
> such as readsq/writesq that Alpha, while being a 64bit platform,
> as of now not yet provide. readq/writeq is however provided
> so the machine can do 64bit I/O.
>
> This comes with the requirement that everything the architecture
> already provides needs to be defined, rather than just being,
> say, static inline functions.
>
> Bite the bullet and just provide the definitions and make it work.
>
> Some defines need to be piled right before the inclusion of
> <asm-generic/io.h> due to the fact that alpha is including
> <asm-generic/iomap.h> without selecting GENERIC_IOMAP.
>
> Reported-by: kernel test robot <lkp@intel.com>
> Link: https://lore.kernel.org/linux-mm/202208181447.G9FLcMkI-lkp@intel.com/
> Cc: Mark Brown <broonie@kernel.org>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Richard Henderson <richard.henderson@linaro.org>
> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
> Cc: Matt Turner <mattst88@gmail.com>
> Cc: linux-arch@vger.kernel.org
> Cc: linux-alpha@vger.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Applied to asm-generic tree, thanks
Arnd
prev parent reply other threads:[~2022-09-08 14:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-06 18:59 [PATCH v2] alpha: Use generic <asm-generic/io.h> Linus Walleij
2022-09-08 14:52 ` Arnd Bergmann [this message]
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