linux-kernel - Re: [PATCH x86] [15/16] Force __cpuinit on for CONFIG_PM without HOTPLUG

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Date:	Thu, 3 Jan 2008 18:22:02 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Andi Kleen <ak@...e.de>
Cc:	pavel@...e.cz, linux-kernel@...r.kernel.org
Subject: Re: [PATCH x86] [15/16] Force __cpuinit on for CONFIG_PM without HOTPLUG_CPU

On Thursday, 3 of January 2008, Andi Kleen wrote:
> 
> This avoids the requirement to mark a lot of initialization functions not 
> __cpuinit just for resume from RAM.
> 
> More functions could be converted now, didn't do all.
> 
> Cc: rjw@...k.pl
> Cc: pavel@...e.cz
> 
> Signed-off-by: Andi Kleen <ak@...e.de>
> 
> ---
>  arch/x86/Kconfig                |    5 +++++
>  arch/x86/kernel/cpu/mtrr/main.c |    2 +-
>  arch/x86/kernel/trampoline_64.S |    2 +-
>  include/linux/init.h            |    2 +-
>  4 files changed, 8 insertions(+), 3 deletions(-)
> 
> Index: linux/arch/x86/kernel/trampoline_64.S
> ===================================================================
> --- linux.orig/arch/x86/kernel/trampoline_64.S
> +++ linux/arch/x86/kernel/trampoline_64.S
> @@ -34,7 +34,7 @@
>  #include <asm/segment.h>
>  
>  /* We can free up trampoline after bootup if cpu hotplug is not supported. */
> -#ifndef CONFIG_HOTPLUG_CPU
> +#if !defined(CONFIG_HOTPLUG_CPU) && !defined(CONFIG_PM_CPUINIT)
>  .section .init.data, "aw", @progbits
>  #else
>  .section .rodata, "a", @progbits
> Index: linux/include/linux/init.h
> ===================================================================
> --- linux.orig/include/linux/init.h
> +++ linux/include/linux/init.h
> @@ -266,7 +266,7 @@ void __init parse_early_param(void);
>  #define __devexitdata __exitdata
>  #endif
>  
> -#ifdef CONFIG_HOTPLUG_CPU
> +#if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_PM_CPUINIT)
>  #define __cpuinit
>  #define __cpuinitdata
>  #define __cpuexit
> Index: linux/arch/x86/Kconfig
> ===================================================================
> --- linux.orig/arch/x86/Kconfig
> +++ linux/arch/x86/Kconfig
> @@ -130,6 +130,11 @@ config GENERIC_PENDING_IRQ
>  	depends on GENERIC_HARDIRQS && SMP
>  	default y
>  
> +config PM_CPUINIT
> +	bool
> +	depends on PM

Please make it PM_SLEEP (PM is more than suspend/hibernation).

> +	default y
> +
>  config X86_SMP
>  	bool
>  	depends on SMP && ((X86_32 && !X86_VOYAGER) || X86_64)
> Index: linux/arch/x86/kernel/cpu/mtrr/main.c
> ===================================================================
> --- linux.orig/arch/x86/kernel/cpu/mtrr/main.c
> +++ linux/arch/x86/kernel/cpu/mtrr/main.c
> @@ -712,7 +712,7 @@ void __init mtrr_bp_init(void)
>  	}
>  }
>  
> -void mtrr_ap_init(void)
> +void __cpuinit mtrr_ap_init(void)
>  {
>  	unsigned long flags;
--
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