linux-kernel - State of RFC PATCH Remove CONFIG_DCACHE_WORD

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Message-ID: <CAKXUXMzQDy-A5n8gvHaT9s21dn_ThuW0frCgm_tXMHPUhLY2zA@mail.gmail.com>
Date:   Mon, 12 Sep 2022 15:46:32 +0200
From:   Lukas Bulwahn <lukas.bulwahn@...il.com>
To:     Joe Perches <joe@...ches.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        kernel-janitors <kernel-janitors@...r.kernel.org>
Subject: State of RFC PATCH Remove CONFIG_DCACHE_WORD_ACCESS

Hi Joe, hi Ben,

While reviewing some kernel config, I came across
CONFIG_DCACHE_WORD_ACCESS and tried to understand its purpose.

Then, I discovered this RFC patch from 2014 that seems never to have
been integrated:

https://lore.kernel.org/all/1393964591.20435.58.camel@joe-AO722/
[RFC] Remove CONFIG_DCACHE_WORD_ACCESS

The discussion seemed to just not continue and the patch was just not
integrated by anyone.

In the meantime, the use of CONFIG_DCACHE_WORD_ACCESS has spread into
a few more files, but replacing it with
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS still seems feasible.

Are you aware of reasons that this patch from 2014 should not be integrated?

I would spend some time to move the integration of this patch further
if you consider that the patch is not completely wrong.

Best regards,

Lukas