linux-kernel - Re: [PATCH 1/3] futex: avoid double wake up in PI futex wait / wake on -RT

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Message-ID: <alpine.DEB.2.11.1504072030040.3845@nanos>
Date:	Tue, 7 Apr 2015 20:41:24 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Darren Hart <darren@...art.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	fredrik.markstrom@...driver.com,
	Davidlohr Bueso <davidlohr@...com>,
	Manfred Spraul <manfred@...orfullife.com>
Subject: Re: [PATCH 1/3] futex: avoid double wake up in PI futex wait / wake
 on -RT

On Tue, 7 Apr 2015, Sebastian Andrzej Siewior wrote:
>  /*
>   * Wake up the next waiter on the lock.
>   *
> - * Remove the top waiter from the current tasks pi waiter list and
> - * wake it up.
> + * Remove the top waiter from the current tasks pi waiter list take a
> + * reference and return a pointer to it.

That comment is stale from an earlier version of that patch. That
should be:

+ * Remove the top waiter from the current tasks pi waiter list,
+ * wake it up and return whether the current task needs to undo
+ * a potential priority boosting.

Thanks,

	tglx
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