linux-kernel - Re: [PATCH (2.6.25) 2/2] suspend: clean up Kconfig

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Message-Id: <200711072319.20224.rjw@sisk.pl>
Date:	Wed, 7 Nov 2007 23:19:18 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	linux-pm@...ts.linux-foundation.org, linuxppc-dev@...abs.org,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	Scott Wood <scottwood@...escale.com>,
	David Howells <dhowells@...hat.com>,
	Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...ux-mips.org,
	Paul Mundt <lethal@...ux-sh.org>,
	Bryan Wu <bryan.wu@...log.com>,
	Russell King <rmk@....linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH (2.6.25) 2/2] suspend: clean up Kconfig

On Wednesday, 7 of November 2007, Johannes Berg wrote:
> This cleans up the suspend Kconfig and removes the need to
> declare centrally which architectures support suspend. All
> architectures that currently support suspend are modified
> accordingly.
> 
> Signed-off-by: Johannes Berg <johannes@...solutions.net>

Acked-by: Rafael J. Wysocki <rjw@...k.pl>

> Cc: linuxppc-dev@...abs.org
> Cc: linux-pm@...ts.linux-foundation.org
> Cc: Guennadi Liakhovetski <g.liakhovetski@....de>
> Cc: Scott Wood <scottwood@...escale.com>
> Cc: David Howells <dhowells@...hat.com>
> Cc: Ralf Baechle <ralf@...ux-mips.org>
> Cc: linux-mips@...ux-mips.org
> Cc: Paul Mundt <lethal@...ux-sh.org>
> Cc: Bryan Wu <bryan.wu@...log.com>
> Cc: Russell King <rmk@....linux.org.uk>
> ---
> Architecture maintainers should evaluate whether their
> ARCH_SUSPEND_POSSIBLE symbol should be set only under
> stricter circumstances like I've done for powerpc.
> 
> Always setting it is not usually a problem, however, since the
> infrastructure is only available for use after suspend_set_ops().
> 
>  arch/arm/Kconfig      |    3 +++
>  arch/blackfin/Kconfig |    4 ++++
>  arch/frv/Kconfig      |    5 +++++
>  arch/i386/Kconfig     |    4 ++++
>  arch/mips/Kconfig     |    4 ++++
>  arch/powerpc/Kconfig  |    4 ++++
>  arch/sh/Kconfig       |    4 ++++
>  arch/x86_64/Kconfig   |    3 +++
>  kernel/power/Kconfig  |   21 +++------------------
>  9 files changed, 34 insertions(+), 18 deletions(-)
> 
> --- everything.orig/arch/i386/Kconfig	2007-11-07 14:45:28.591544215 +0100
> +++ everything/arch/i386/Kconfig	2007-11-07 14:45:28.631515461 +0100
> @@ -1323,3 +1323,7 @@ config KTIME_SCALAR
>  config ARCH_HIBERNATION_POSSIBLE
>  	def_bool y
>  	depends on !SMP || !X86_VOYAGER
> +
> +config ARCH_SUSPEND_POSSIBLE
> +	def_bool y
> +	depends on !X86_VOYAGER
> --- everything.orig/arch/x86_64/Kconfig	2007-11-07 14:45:28.591544215 +0100
> +++ everything/arch/x86_64/Kconfig	2007-11-07 14:45:28.631515461 +0100
> @@ -716,6 +716,9 @@ menu "Power management options"
>  
>  source kernel/power/Kconfig
>  
> +config ARCH_SUSPEND_POSSIBLE
> +	def_bool y
> +
>  config ARCH_HIBERNATION_POSSIBLE
>  	def_bool y
>  
> --- everything.orig/kernel/power/Kconfig	2007-11-07 14:45:28.591544215 +0100
> +++ everything/kernel/power/Kconfig	2007-11-07 14:45:28.641531465 +0100
> @@ -64,7 +64,7 @@ config PM_TRACE
>  config PM_SLEEP_SMP
>  	bool
>  	depends on SMP
> -	depends on SUSPEND_SMP_POSSIBLE || ARCH_HIBERNATION_POSSIBLE
> +	depends on ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE
>  	depends on PM_SLEEP
>  	select HOTPLUG_CPU
>  	default y
> @@ -74,29 +74,14 @@ config PM_SLEEP
>  	depends on SUSPEND || HIBERNATION
>  	default y
>  
> -config SUSPEND_UP_POSSIBLE
> -	bool
> -	depends on (X86 && !X86_VOYAGER) || PPC || ARM || BLACKFIN || MIPS \
> -		   || SUPERH || FRV
> -	depends on !SMP
> -	default y
> -
> -config SUSPEND_SMP_POSSIBLE
> -	bool
> -	depends on (X86 && !X86_VOYAGER) \
> -		   || (PPC && (PPC_PSERIES || PPC_PMAC)) || ARM
> -	depends on SMP
> -	default y
> -
>  config SUSPEND
>  	bool "Suspend to RAM and standby"
> -	depends on PM
> -	depends on SUSPEND_UP_POSSIBLE || SUSPEND_SMP_POSSIBLE
> +	depends on PM && ARCH_SUSPEND_POSSIBLE
>  	default y
>  	---help---
>  	  Allow the system to enter sleep states in which main memory is
>  	  powered and thus its contents are preserved, such as the
> -	  suspend-to-RAM state (i.e. the ACPI S3 state).
> +	  suspend-to-RAM state (e.g. the ACPI S3 state).
>  
>  config HIBERNATION
>  	bool "Hibernation (aka 'suspend to disk')"
> --- everything.orig/arch/blackfin/Kconfig	2007-11-07 14:44:55.551521971 +0100
> +++ everything/arch/blackfin/Kconfig	2007-11-07 14:45:28.641531465 +0100
> @@ -993,6 +993,10 @@ endmenu
>  menu "Power management options"
>  source "kernel/power/Kconfig"
>  
> +config ARCH_SUSPEND_POSSIBLE
> +	def_bool y
> +	depends on !SMP
> +
>  choice
>  	prompt "Select PM Wakeup Event Source"
>  	default PM_WAKEUP_GPIO_BY_SIC_IWR
> --- everything.orig/arch/arm/Kconfig	2007-11-07 14:44:55.651522948 +0100
> +++ everything/arch/arm/Kconfig	2007-11-07 14:45:28.641531465 +0100
> @@ -977,6 +977,9 @@ menu "Power management options"
>  
>  source "kernel/power/Kconfig"
>  
> +config ARCH_SUSPEND_POSSIBLE
> +	def_bool y
> +
>  endmenu
>  
>  source "net/Kconfig"
> --- everything.orig/arch/mips/Kconfig	2007-11-07 14:44:55.701522460 +0100
> +++ everything/arch/mips/Kconfig	2007-11-07 14:45:28.641531465 +0100
> @@ -1999,6 +1999,10 @@ endmenu
>  
>  menu "Power management options"
>  
> +config ARCH_SUSPEND_POSSIBLE
> +	def_bool y
> +	depends on !SMP
> +
>  source "kernel/power/Kconfig"
>  
>  endmenu
> --- everything.orig/arch/sh/Kconfig	2007-11-07 14:44:55.801520344 +0100
> +++ everything/arch/sh/Kconfig	2007-11-07 14:45:28.651528536 +0100
> @@ -748,6 +748,10 @@ endmenu
>  menu "Power management options (EXPERIMENTAL)"
>  depends on EXPERIMENTAL && SYS_SUPPORTS_PM
>  
> +config ARCH_SUSPEND_POSSIBLE
> +	def_bool y
> +	depends on !SMP
> +
>  source kernel/power/Kconfig
>  
>  endmenu
> --- everything.orig/arch/frv/Kconfig	2007-11-07 14:44:55.861520941 +0100
> +++ everything/arch/frv/Kconfig	2007-11-07 14:45:28.651528536 +0100
> @@ -357,6 +357,11 @@ source "drivers/pcmcia/Kconfig"
>  #	  should probably wait a while.
>  
>  menu "Power management options"
> +
> +config ARCH_SUSPEND_POSSIBLE
> +	def_bool y
> +	depends on !SMP
> +
>  source kernel/power/Kconfig
>  endmenu
>  
> --- everything.orig/arch/powerpc/Kconfig	2007-11-07 14:45:28.591544215 +0100
> +++ everything/arch/powerpc/Kconfig	2007-11-07 14:45:28.651528536 +0100
> @@ -155,6 +155,10 @@ config ARCH_HIBERNATION_POSSIBLE
>  	depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
>  	default y
>  
> +config ARCH_SUSPEND_POSSIBLE
> +	def_bool y
> +	depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200
> +
>  config PPC_DCR_NATIVE
>  	bool
>  	default n
> 



-- 
"Premature optimization is the root of all evil." - Donald Knuth
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