linux-kernel - RE: [PATCH] ASoC: mchp-spdiftx: Fix clang -Wbitfield-constant-conversion

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Message-ID: <24087aa311e84df3a3df3c0e15151580@AcuMS.aculab.com>
Date:   Mon, 15 Aug 2022 09:55:50 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Nick Desaulniers' <ndesaulniers@...gle.com>,
        Nathan Chancellor <nathan@...nel.org>
CC:     Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Tom Rix <trix@...hat.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "llvm@...ts.linux.dev" <llvm@...ts.linux.dev>
Subject: RE: [PATCH] ASoC: mchp-spdiftx: Fix clang
 -Wbitfield-constant-conversion

From: Nick Desaulniers
> Sent: 10 August 2022 22:14
> 
> On Tue, Aug 9, 2022 at 6:08 PM Nathan Chancellor <nathan@...nel.org> wrote:
> >
> > A recent change in clang strengthened its -Wbitfield-constant-conversion
> > to warn when 1 is assigned to a 1-bit signed integer bitfield, as it can
> > only be 0 or -1, not 1:

Is there a -Wsigned-bitfield ?
You probably don't ever want the compiler to be generating
the code to sign-propagate a bitfield.

	David

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