linux-kernel - Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation

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Date:	Mon, 03 Feb 2014 14:21:40 +0530
From:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
To:	Waiman Long <Waiman.Long@...com>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Arnd Bergmann <arnd@...db.de>,
	linux-arch@...r.kernel.org, x86@...nel.org,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michel Lespinasse <walken@...gle.com>,
	Andi Kleen <andi@...stfloor.org>,
	Rik van Riel <riel@...hat.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	George Spelvin <linux@...izon.com>,
	Tim Chen <tim.c.chen@...ux.intel.com>,
	Daniel J Blueman <daniel@...ascale.com>,
	Alexander Fyodorov <halcy@...dex.ru>,
	Aswin Chandramouleeswaran <aswin@...com>,
	Scott J Norton <scott.norton@...com>,
	Thavatchai Makphaibulchoke <thavatchai.makpahibulchoke@...com>
Subject: Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock
 implementation

On 01/28/2014 11:49 PM, Waiman Long wrote:
> +#endif /* __ASM_GENERIC_QSPINLOCK_H */
> diff --git a/kernel/Kconfig.locks b/kernel/Kconfig.locks
> index d2b32ac..f185584 100644
> --- a/kernel/Kconfig.locks
> +++ b/kernel/Kconfig.locks
> @@ -223,3 +223,10 @@ endif
>   config MUTEX_SPIN_ON_OWNER
>   	def_bool y
>   	depends on SMP && !DEBUG_MUTEXES
> +
> +config ARCH_USE_QUEUE_SPINLOCK
> +	bool
> +
> +config QUEUE_SPINLOCK
> +	def_bool y if ARCH_USE_QUEUE_SPINLOCK
> +	depends on SMP && !PARAVIRT_SPINLOCKS

This should have been !CONFIG_PARAVIRT instead of !PARAVIRT_SPINLOCKS ?

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