linux-kernel - Re: [patch 06/20] posix-timers: Annotate concurrent access to k_itimer::it

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Message-ID: <ZFootxdd/1o8P9Zd@lothringen>
Date:   Tue, 9 May 2023 13:04:23 +0200
From:   Frederic Weisbecker <frederic@...nel.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Anna-Maria Behnsen <anna-maria@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Sebastian Siewior <bigeasy@...utronix.de>,
        syzbot+5c54bd3eb218bb595aa9@...kaller.appspotmail.com,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Michael Kerrisk <mtk.manpages@...il.com>
Subject: Re: [patch 06/20] posix-timers: Annotate concurrent access to
 k_itimer::it_signal

On Tue, Apr 25, 2023 at 08:49:05PM +0200, Thomas Gleixner wrote:
> k_itimer::it_signal is read lockless in the RCU protected hash lookup, but
> it can be written concurrently in the timer_create() and timer_delete()
> path. Annotate these places with READ_ONCE() and WRITE_ONCE()
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

Reviewed-by: Frederic Weisbecker <frederic@...nel.org>