linux-kernel - Re: [PATCH v5 17/18] READ_ONCE: Use data_race() to avoid KCSAN instrumentation

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Message-ID: <20200512082306.GF2978@hirez.programming.kicks-ass.net>
Date:   Tue, 12 May 2020 10:23:06 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Will Deacon <will@...nel.org>
Cc:     linux-kernel@...r.kernel.org, elver@...gle.com, tglx@...utronix.de,
        paulmck@...nel.org, mingo@...nel.org
Subject: Re: [PATCH v5 17/18] READ_ONCE: Use data_race() to avoid KCSAN
 instrumentation

On Mon, May 11, 2020 at 09:41:49PM +0100, Will Deacon wrote:

> +	data_race(({ __WRITE_ONCE(*__xp, val); 0; }));			\

That had me blink for a little, I see how we got there, but urgh.

Anyway, it's all in *much* better shape now than it was, so no real
copmlaints.