linux-kernel - Re: [PATCH v4 0/7] firmware: smccc: Add basic SMCCC v1.2 + ARCH_SOC

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Date:   Thu, 21 May 2020 11:30:51 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Will Deacon <will@...nel.org>
Cc:     Sudeep Holla <sudeep.holla@....com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Steven Price <steven.price@....com>, harb@...erecomputing.com,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 0/7] firmware: smccc: Add basic SMCCC v1.2 +
 ARCH_SOC_ID support

On Thu, May 21, 2020 at 11:17 AM Will Deacon <will@...nel.org> wrote:
> On Thu, May 21, 2020 at 11:06:23AM +0200, Arnd Bergmann wrote:
> > On Thu, May 21, 2020 at 10:11 AM Sudeep Holla <sudeep.holla@....com> wrote:
> > Note that the warning should come up for either W=1 or C=1, and I also
> > think that
> > new code should generally be written sparse-clean and have no warnings with
> > 'make C=1' as a rule.
>
> Fair enough. Is anybody working on a tree-wide sweep for this, like we've
> done for other things such as zero-length arrays? If so, I can start
> enforcing this in the arch code as well (I haven't been so far, even though
> I do run sparse on every commit).

I've done some work on that a few years ago, and there are always
some cleanup patches for C=1 and W=1 warnings, most recently
with an increase from Huawei's automated build testing + manual
patching.

I have not looked in a while, but it always seemed to be somewhere
between "too much to do by myself" and "small enough that it should
really be done" as build warnings go.

       Arnd