linux-kernel - Re: [PATCH] kernel: clean up USE_GENERIC_SMP

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Date:	Wed, 22 Dec 2010 14:08:53 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Amerigo Wang <amwang@...hat.com>
Cc:	linux-kernel@...r.kernel.org, David Howells <dhowells@...hat.com>,
	Koichi Yasutake <yasutake.koichi@...panasonic.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Yinghai Lu <yinghai@...nel.org>, Tejun Heo <tj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <jaxboe@...ionio.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Venkatesh Pallipadi <venki@...gle.com>,
	linux-am33-list@...hat.com
Subject: Re: [PATCH] kernel: clean up USE_GENERIC_SMP_HELPERS

On Mon, 2010-11-29 at 14:06 +0800, Amerigo Wang wrote:
> For arch which needs USE_GENERIC_SMP_HELPERS, it has to
> select USE_GENERIC_SMP_HELPERS, rather than leaving a choice
> to user, since they don't provide their own implementions.
> 

>  config MN10300_CURRENT_IN_E2
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index e330da2..736beea 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -65,6 +65,7 @@ config X86
>  	select HAVE_SPARSE_IRQ
>  	select GENERIC_IRQ_PROBE
>  	select GENERIC_PENDING_IRQ if SMP
> +	select USE_GENERIC_SMP_HELPERS if SMP
>  
>  config INSTRUCTION_DECODER
>  	def_bool (KPROBES || PERF_EVENTS)
> @@ -203,10 +204,6 @@ config HAVE_INTEL_TXT
>  	def_bool y
>  	depends on EXPERIMENTAL && DMAR && ACPI
>  
> -config USE_GENERIC_SMP_HELPERS
> -	def_bool y
> -	depends on SMP
> -
>  config X86_32_SMP
>  	def_bool y
>  	depends on X86_32 && SMP

That changelog and the patch don't match, the patch is a total NOP,
users never see that config option.
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