linux-kernel - Re: [PATCH 0/6] Don't use BIT() macro in UAPI headers

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Message-ID: <YKuSEnfEbjpOOgLS@infradead.org>
Date:   Mon, 24 May 2021 12:46:26 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     Joe Richey <joerichey94@...il.com>
Cc:     trivial@...nel.org, Joe Richey <joerichey@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Zhangfei Gao <zhangfei.gao@...aro.org>,
        Zhou Wang <wangzhou1@...ilicon.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        linux-accelerators@...ts.ozlabs.org
Subject: Re: [PATCH 0/6] Don't use BIT() macro in UAPI headers

On Thu, May 20, 2021 at 03:43:37AM -0700, Joe Richey wrote:
> This patch series changes all UAPI uses of BIT() to just be open-coded.
> However, there really should be a check for this in checkpatch.pl
> Currently, the script actually _encourages_ users to use the BIT macro
> even if adding things to UAPI.

Yes.  In fact it should warn about BIT() in general.  It is totally
pointless obsfucation that doesn't even save any typing at all.