linux-kernel - Re: [tip:locking/urgent] locking/mutex: Disable optimistic spinning on some architectures

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Message-ID: <53C7BA82.9020602@de.ibm.com>
Date:	Thu, 17 Jul 2014 13:58:58 +0200
From:	Christian Borntraeger <borntraeger@...ibm.com>
To:	mingo@...nel.org, dave.anglin@...l.net,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>
CC:	torvalds@...ux-foundation.org, catalin.marinas@....com,
	peterz@...radead.org, cmetcalf@...era.com, jason.low2@...com,
	linux@....linux.org.uk, tglx@...utronix.de, davidlohr@...com,
	linux-kernel@...r.kernel.org, hpa@...or.com,
	James.Bottomley@...senpartnership.com, will.deacon@....com,
	waiman.long@...com, james.hogan@...tec.com, mpatocka@...hat.com,
	davem@...emloft.net, paulmck@...ux.vnet.ibm.com,
	vgupta@...opsys.com, benh@...nel.crashing.org,
	jejb@...isc-linux.org
Subject: Re: [tip:locking/urgent] locking/mutex:  Disable optimistic spinning
 on some architectures

On 17/07/14 13:51, Christian Borntraeger wrote:

>  	select ARCH_HAVE_NMI_SAFE_CMPXCHG
> +	select ARCH_SUPPORTS_ATOMIC_RMW

This begs the question, if both defines were created for the same reason and could be combined.

Christian

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