linux-kernel - Re: [PATCH] linux/bits.h: fix -Wtype-limits warnings in GENMASK_INPUT

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Date:   Mon, 7 Mar 2022 18:33:11 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Vincent MAILHOL <mailhol.vincent@...adoo.fr>
Cc:     Alexander Lobakin <alexandr.lobakin@...el.com>,
        Rikard Falkeborn <rikard.falkeborn@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH] linux/bits.h: fix -Wtype-limits warnings in GENMASK_INPUT_CHECK()

On Mon, Mar 7, 2022 at 4:06 PM Vincent MAILHOL
<mailhol.vincent@...adoo.fr> wrote:
> On Mon. 7 Mar 2022 at 22:40, Andy Shevchenko <andy.shevchenko@...il.com> wrote:
> > On Mon, Mar 7, 2022 at 1:00 PM Alexander Lobakin
> > <alexandr.lobakin@...el.com> wrote:
> > > From: Andy Shevchenko <andy.shevchenko@...il.com>
> > > Date: Fri, 4 Mar 2022 20:46:08 +0200
> > > > On Fri, Mar 4, 2022 at 7:36 PM Vincent Mailhol
> > > > <mailhol.vincent@...adoo.fr> wrote:

...

> > > > Have you fixed W=1 warnings?
> > > > Without fixing W=1 (which makes much more sense, when used with
> > > > WERROR=y && COMPILE_TEST=y) this has no value.
> > >
> > > How is this connected?
> >
> > By priorities.
> > I don't see much value in fixing W=2 per se if the code doesn't compile for W=1.
>
> *My code* compiles for W=1. For me, fixing this W=2 in the next in line
> if speaking of priorities.

> I do not understand why I should be forbidden to fix a W=2 in the
> file which I am maintaining on the grounds that some code to which
> I do not care still has some W=1.

It's not forbidden. I said something different.

Whatever, thank you for doing it, perhaps we will have less noise in W=2 case.

-- 
With Best Regards,
Andy Shevchenko