From c882e0feb937af4e5b991cbd1c81536f37053e86 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Robert=20Sch=C3=B6ne?= <robert.schoene@tu-dresden.de>
Date: Mon, 14 Jun 2010 13:37:20 +0200
Subject: x86, perf: Add power_end event to process_*.c cpu_idle routine

Systems using the idle thread from process_32.c and process_64.c
do not generate power_end events which could be traced using
perf. This patch adds the event generation for such systems.

Signed-off-by: Robert Schoene <robert.schoene@tu-dresden.de>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <1276515440.5441.45.camel@localhost>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 arch/x86/kernel/process_32.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'arch/x86/kernel/process_32.c')

diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 8d12878..96586c3 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -57,6 +57,8 @@
 #include <asm/syscalls.h>
 #include <asm/debugreg.h>
 
+#include <trace/events/power.h>
+
 asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
 
 /*
@@ -111,6 +113,8 @@ void cpu_idle(void)
 			stop_critical_timings();
 			pm_idle();
 			start_critical_timings();
+
+			trace_power_end(smp_processor_id());
 		}
 		tick_nohz_restart_sched_tick();
 		preempt_enable_no_resched();
-- 
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