linux-kernel - Re: [PATCH [RT] 02/14] spinlock: make preemptible-waiter feature a specific config option

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Message-ID: <20080222190950.GC6060@ucw.cz>
Date:	Fri, 22 Feb 2008 20:09:50 +0100
From:	Pavel Machek <pavel@....cz>
To:	Gregory Haskins <ghaskins@...ell.com>
Cc:	mingo@...e.hu, a.p.zijlstra@...llo.nl, tglx@...utronix.de,
	rostedt@...dmis.org, linux-rt-users@...r.kernel.org,
	linux-kernel@...r.kernel.org, bill.huey@...il.com,
	kevin@...man.org, cminyard@...sta.com, dsingleton@...sta.com,
	dwalker@...sta.com, npiggin@...e.de, dsaxena@...xity.net,
	ak@...e.de, gregkh@...e.de, sdietrich@...ell.com,
	pmorreale@...ell.com, mkohari@...ell.com
Subject: Re: [PATCH [RT] 02/14] spinlock: make preemptible-waiter feature a specific config option

Hi!

> We introduce a configuration variable for the feature to make it easier for
> various architectures and/or configs to enable or disable it based on their
> requirements.  
> 
> Signed-off-by: Gregory Haskins <ghaskins@...ell.com>
> ---
> 
>  kernel/Kconfig.preempt |    9 +++++++++
>  kernel/spinlock.c      |    7 +++----
>  lib/Kconfig.debug      |    1 +
>  3 files changed, 13 insertions(+), 4 deletions(-)
> 
> diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt
> index 41a0d88..5b45213 100644
> --- a/kernel/Kconfig.preempt
> +++ b/kernel/Kconfig.preempt
> @@ -86,6 +86,15 @@ config PREEMPT
>  	default y
>  	depends on PREEMPT_DESKTOP || PREEMPT_RT
>  
> +config DISABLE_PREEMPT_SPINLOCK_WAITERS
> +        bool
> +	default n
> +
> +config PREEMPT_SPINLOCK_WAITERS
> +        bool
> +	default y
> +	depends on PREEMPT && SMP && !DISABLE_PREEMPT_SPINLOCK_WAITERS

tabs vs. spaces problems?

-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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