linux-kernel - Re: [RFC 01/22] Generic show

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Date:	Thu, 3 Apr 2008 09:55:45 +0200
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Johannes Weiner <hannes@...urebad.de>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org, mingo@...e.hu,
	davem@...emloft.net, hskinnemoen@...el.com, cooloney@...nel.org,
	starvik@...s.com, dhowells@...hat.com, ysato@...rs.sf.net,
	takata@...ux-m32r.org, geert@...ux-m68k.org, ralf@...ux-mips.org,
	kyle@...isc-linux.org, paulus@...ba.org, schwidefsky@...ibm.com,
	lethal@...ux-sh.org, jdike@...toit.com, miles@....org,
	chris@...kel.net, rmk@....linux.org.uk, tony.luck@...el.com
Subject: Re: [RFC 01/22] Generic show_mem() implementation

> diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
> index 729cdbd..efffa92 100644
> --- a/arch/alpha/Kconfig
> +++ b/arch/alpha/Kconfig
> @@ -598,6 +598,9 @@ config ALPHA_LARGE_VMALLOC
> 
>  	  Say N unless you know you need gobs and gobs of vmalloc space.
> 
> +config HAVE_ARCH_SHOW_MEM
> +	def_bool y
> +
>  config VERBOSE_MCHECK
>  	bool "Verbose Machine Checks"
> 
> diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
> index 76348f0..acad217 100644
> --- a/arch/arm/mm/Kconfig
> +++ b/arch/arm/mm/Kconfig
> @@ -673,3 +673,6 @@ config OUTER_CACHE
>  config CACHE_L2X0
>  	bool
>  	select OUTER_CACHE
> +
> +config HAVE_ARCH_SHOW_MEM
> +	def_bool y

These are all not necessary. Better add some global Kconfig option that
gets selected by an arch if it wants the generic implementation.

e.g. we currently have this in arch/s390/Kconfig:

config S390
        def_bool y
        select HAVE_OPROFILE
        select HAVE_KPROBES
        select HAVE_KRETPROBES

just add a select HAVE_GENERIC_SHOWMEM or something like that in the arch
specific patches.
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