[PATCH v2] ACPI: move acpi_no_s4_hw_signature() declaration into #ifdef CONFIG_HIBERNATION

From: Yuanhan Liu
Date: Tue Oct 16 2012 - 01:24:00 EST

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 âacpi_no_s4_hw_signatureâ [-Werror=implicit-function-declaration]

v2: take better title and add build error message suggested by Fengguang

Signed-off-by: Yuanhan Liu <yuanhan.liu@xxxxxxxxxxxxxxx>
Reviewed-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
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);

void __init acpi_no_s4_hw_signature(void);
void __init acpi_old_suspend_ordering(void);
void __init acpi_nvs_nosave(void);
#endif /* CONFIG_PM_SLEEP */

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