linux-kernel - Re: + clocksource-initialize-list-value.patch added to -mm tree

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Date:	Sun, 08 Oct 2006 11:50:39 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	akpm@...l.org
Cc:	dwalker@...sta.com, johnstul@...ibm.com, mingo@...e.hu,
	zippel@...ux-m68k.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: + clocksource-initialize-list-value.patch added to -mm tree

On Fri, 2006-10-06 at 18:53 -0700, akpm@...l.org wrote:
> A change to clocksource initialization.  It's optional for new clocksources,
> but prefered.  If the list field is initialized it allows clocksource_register
> to complete faster since it doesn't have the scan the list of clocks doing
> strcmp on each.

Either make it required or not.

> diff -puN arch/i386/kernel/hpet.c~clocksource-initialize-list-value arch/i386/kernel/hpet.c
> --- a/arch/i386/kernel/hpet.c~clocksource-initialize-list-value
> +++ a/arch/i386/kernel/hpet.c
> @@ -27,6 +27,7 @@ static struct clocksource clocksource_hp
>  	.mult		= 0, /* set below */
>  	.shift		= HPET_SHIFT,
>  	.is_continuous	= 1,
> +	.list		= CLOCKSOURCE_LIST_INIT(clocksource_hpet.list),
... 
> +/* Abstracted list initialization */
> +#define CLOCKSOURCE_LIST_INIT(x)	LIST_HEAD_INIT(x)
> +

Please use LIST_HEAD_INIT(). This is not an abstraction, this is an
obfuscation. 

	tglx


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