linux-kernel - Re: [PATCH] qspinlock: use signed temporaries for cmpxchg

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Message-ID: <20201027173431.GE2611@hirez.programming.kicks-ass.net>
Date:   Tue, 27 Oct 2020 18:34:31 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Waiman Long <longman@...hat.com>,
        Matthew Wilcox <willy@...radead.org>,
        Ingo Molnar <mingo@...nel.org>, Will Deacon <will@...nel.org>,
        Will Deacon <will.deacon@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Nicholas Piggin <npiggin@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        linux-arch <linux-arch@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] qspinlock: use signed temporaries for cmpxchg

On Tue, Oct 27, 2020 at 05:22:48PM +0100, Arnd Bergmann wrote:
> I have already sent patches to move -Wnested-externs and
> -Wcast-align from W=2 to W=3, and I guess -Wpointer-sign
> could be handled the same way to make the W=2 level useful
> again.

Works for me ;-), thanks!