linux-kernel - Re: [PATCH v2] ACPI: move acpi_no_s4_hw_signature() declaration into #ifdef CONFIG

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Date:	Thu, 25 Oct 2012 00:12:14 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Yuanhan Liu <yuanhan.liu@...ux.intel.com>
Cc:	lenb@...nel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, fengguang.wu@...el.com
Subject: Re: [PATCH v2] ACPI: move acpi_no_s4_hw_signature() declaration into #ifdef CONFIG_HIBERNATION

On Tuesday 16 of October 2012 13:24:12 Yuanhan Liu wrote:
> acpi_no_s4_hw_signature is defined in #ifdef CONFIG_HIBERNATION block,
> but the current code put the declaration in #ifdef CONFIG_PM_SLEEP block.
> 
> I happened to meet this issue when I turned off PM_SLEEP config manually:
> arch/x86/kernel/acpi/sleep.c:100:4: error: implicit declaration of function ‘acpi_no_s4_hw_signature’ [-Werror=implicit-function-declaration]
> 
> v2: take better title and add build error message suggested by Fengguang
> 
> Signed-off-by: Yuanhan Liu <yuanhan.liu@...ux.intel.com>
> Reviewed-by: Fengguang Wu <fengguang.wu@...el.com>

Applied to linux-pm.git/acpi-next as v3.8 material.

Thanks,
Rafael


> ---
>  include/linux/acpi.h |    5 ++++-
>  1 files changed, 4 insertions(+), 1 deletions(-)
> 
> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> index 90be989..a468429 100644
> --- a/include/linux/acpi.h
> +++ b/include/linux/acpi.h
> @@ -257,8 +257,11 @@ int acpi_check_region(resource_size_t start, resource_size_t n,
>  
>  int acpi_resources_are_enforced(void);
>  
> -#ifdef CONFIG_PM_SLEEP
> +#ifdef CONFIG_HIBERNATION
>  void __init acpi_no_s4_hw_signature(void);
> +#endif
> +
> +#ifdef CONFIG_PM_SLEEP
>  void __init acpi_old_suspend_ordering(void);
>  void __init acpi_nvs_nosave(void);
>  #endif /* CONFIG_PM_SLEEP */
> 
-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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