apic.h does not get included on UP compiles.
That way the APICTIMER_STOPS_ON_C3 is not there and UP boxen have no support
for timer broadcasting. This was never noticed, because the lapic timer is 
only used for profiling on UP.

Signed-of-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 drivers/acpi/processor_idle.c |    1 +
 1 files changed, 1 insertion(+)

diff -puN drivers/acpi/processor_idle.c~acpi-include-apic-h drivers/acpi/processor_idle.c
--- a/drivers/acpi/processor_idle.c~acpi-include-apic-h
+++ a/drivers/acpi/processor_idle.c
@@ -40,6 +40,7 @@
 #include <linux/sched.h>	/* need_resched() */
 #include <linux/latency.h>
 
+#include <asm/apic.h>
 #include <asm/io.h>
 #include <asm/uaccess.h>
 
_