linux-kernel - Re: [btrfs/rt] lockdep false positive

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Date:   Sun, 22 Jan 2017 19:25:20 +0100
From:   Mike Galbraith <umgwanakikbuti@...il.com>
To:     LKML <linux-kernel@...r.kernel.org>,
        linux-rt-users <linux-rt-users@...r.kernel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: [btrfs/rt] lockdep false positive

 
> +> 	> 	> /*
> +> 	> 	>  * Allow read-after-read or read-after-write recursion of the
> +> 	> 	>  * same lock class for RT rwlocks.
> +> 	> 	>  */
> +> 	> 	> if (read == 3 && (prev->read == 3 || prev->read == 0))

Pff, shoulda left it reader vs reader.. but it's gotta be wrong anyway.