Date: Wed, 30 Apr 2014 11:21:36 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Davidlohr Bueso <davidlohr@hp.com>
Cc: Ingo Molnar <mingo@kernel.org>, Andrew Morton <akpm@linux-foundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Tim Chen <tim.c.chen@linux.intel.com>,
        Andrea Arcangeli <aarcange@redhat.com>, Alex Shi <alex.shi@linaro.org>,
        Andi Kleen <andi@firstfloor.org>,
        Michel Lespinasse <walken@google.com>, Rik van Riel <riel@redhat.com>,
        Peter Hurley <peter@hurleysoftware.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        "Paul E.McKenney" <paulmck@linux.vnet.ibm.com>,
        Aswin Chandramouleeswaran <aswin@hp.com>,
        "Norton, Scott J" <scott.norton@hp.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] rwsem: Support optimistic spinning
Message-ID: <20140430092136.GD11096@twins.programming.kicks-ass.net>
References: <1398205166.6345.7.camel@buesod1.americas.hpqcorp.net>
 <1398722941.25549.16.camel@buesod1.americas.hpqcorp.net>
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On Mon, Apr 28, 2014 at 03:09:01PM -0700, Davidlohr Bueso wrote:
> +#ifdef CONFIG_SMP

> +#else
> +static bool rwsem_optimistic_spin(struct rw_semaphore *sem)
> +{
> +	return false;
> +}
> +#endif

On the mutex side we guard this with MUTEX_SPIN_ON_OWNER, do we want to
use that here too?
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