linux-kernel - Re: [PATCH v4 1/2] locking/rwsem: Add DEBUG_RWSEMS to look for lock/unlock mismatches

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Message-ID: <20180329150148.ydmsymzupgi5v7ql@linux-n805>
Date:   Thu, 29 Mar 2018 08:01:48 -0700
From:   Davidlohr Bueso <dave@...olabs.net>
To:     Waiman Long <longman@...hat.com>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/2] locking/rwsem: Add DEBUG_RWSEMS to look for
 lock/unlock mismatches

On Thu, 29 Mar 2018, Waiman Long wrote:

>Because it checks the owner field which is present only if
>RWSEM_SPIN_ON_OWNER is defined. Mutex is different in the sense that the
>owner field is always there no matter if MUTEX_SPIN_ON_OWNER is set or not.

Ah right; that's after Peter's mutex rewrite iirc. No objections from me.

Acked-by: Davidlohr Bueso <dave@...olabs.net>