[PATCH] Fix gcc 4 compilation in ACPI

extern declaration of static
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/acpi/processor.h

@@ -177,7 +177,6 @@ int acpi_processor_notify_smm(struct module *calling_module);
 /* for communication between multiple parts of the processor kernel module */
 extern struct acpi_processor	*processors[NR_CPUS];
 extern struct acpi_processor_errata errata;
-extern void (*pm_idle_save)(void);
 
 /* in processor_perflib.c */
 #ifdef CONFIG_CPU_FREQ