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Date:   Wed, 6 Jan 2021 11:33:33 +0100
From:   Peter Zijlstra <peterz@infradead.org>
To:     Frederic Weisbecker <frederic@kernel.org>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
        Ingo Molnar <mingo@kernel.org>,
        Fabio Estevam <festevam@gmail.com>, stable@vger.kernel.org,
        Thomas Gleixner <tglx@linutronix.de>,
        "Paul E . McKenney" <paulmck@kernel.org>,
        Len Brown <lenb@kernel.org>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        NXP Linux Team <linux-imx@nxp.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Shawn Guo <shawnguo@kernel.org>,
        Sascha Hauer <s.hauer@pengutronix.de>
Subject: Re: [PATCH 1/4] sched/idle: Fix missing need_resched() check after
 rcu_idle_enter()
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References: <20210104152058.36642-1-frederic@kernel.org>
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 <20210105095503.GF3040@hirez.programming.kicks-ass.net>
 <20210105125722.GA68490@lothringen>
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On Tue, Jan 05, 2021 at 01:57:22PM +0100, Frederic Weisbecker wrote:

> > Something like the below, combined with a fixup for all callers (which
> > the compiler will help us find thanks to __must_check).
> 
> Right, I just need to make sure that the wake up is local as the kthread
> awaken can be queued anywhere. But a simple need_resched() check after the
> wake up should be fine to get that.

Duh, yes. Clearly I'm having startup problems after the holidays ;-)