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Date: Thu, 13 Apr 2017 16:39:52 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Alex Shi <alex.shi@linaro.org>
Cc: mingo@redhat.com, corbet@lwn.net,
        "open list:LOCKING PRIMITIVES" <linux-kernel@vger.kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Sebastian Siewior <bigeasy@linutronix.de>,
        Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 2/3] rtmutex: deboost priority conditionally when
 rt-mutex unlock
Message-ID: <20170413143952.ty4dw5mvyfnhaqgh@hirez.programming.kicks-ass.net>
References: <1492092174-31734-1-git-send-email-alex.shi@linaro.org>
 <1492092174-31734-3-git-send-email-alex.shi@linaro.org>
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On Thu, Apr 13, 2017 at 10:02:53PM +0800, Alex Shi wrote:
>  	/*
> +	 * 'current' release this lock, so 'current' should be a higher prio
> +	 * task than the next top waiter, unless the current prio was gotten
> +	 * from this top waiter, iff so, we need to deboost 'current' after
> +	 * the lock release.
> +	 */
> +	if (current->prio == waiter->prio)
> +		deboost = true;

This is wrong.