[RFC PATCH 1/3] perf: export perf helper functions

[Zhang Rui <rui.zhang@intel.com>]

Make more perf helper functions global, so that we can write a
new pmu more easily.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
---
 include/linux/perf_event.h |    2 ++
 kernel/perf_event.c        |   12 ++++++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

Index: linux-2.6/kernel/perf_event.c
===================================================================
--- linux-2.6.orig/kernel/perf_event.c
+++ linux-2.6/kernel/perf_event.c
@@ -4572,7 +4572,7 @@ static enum hrtimer_restart perf_swevent
 	return ret;
 }
 
-static void perf_swevent_start_hrtimer(struct perf_event *event)
+void perf_swevent_start_hrtimer(struct perf_event *event)
 {
 	struct hw_perf_event *hwc = &event->hw;
 
@@ -4595,7 +4595,9 @@ static void perf_swevent_start_hrtimer(s
 	}
 }
 
-static void perf_swevent_cancel_hrtimer(struct perf_event *event)
+EXPORT_SYMBOL(perf_swevent_start_hrtimer);
+
+void perf_swevent_cancel_hrtimer(struct perf_event *event)
 {
 	struct hw_perf_event *hwc = &event->hw;
 
@@ -4607,6 +4609,8 @@ static void perf_swevent_cancel_hrtimer(
 	}
 }
 
+EXPORT_SYMBOL(perf_swevent_cancel_hrtimer);
+
 /*
  * Software event: cpu wall time clock
  */
@@ -4815,6 +4819,8 @@ unlock:
 	return ret;
 }
 
+EXPORT_SYMBOL(perf_pmu_register);
+
 void perf_pmu_unregister(struct pmu *pmu)
 {
 	mutex_lock(&pmus_lock);
@@ -4825,6 +4831,8 @@ void perf_pmu_unregister(struct pmu *pmu
 	synchronize_srcu(&pmus_srcu);
 }
 
+EXPORT_SYMBOL(perf_pmu_unregister);
+
 struct pmu *perf_init_event(struct perf_event *event)
 {
 	struct pmu *pmu = NULL;
Index: linux-2.6/include/linux/perf_event.h
===================================================================
--- linux-2.6.orig/include/linux/perf_event.h
+++ linux-2.6/include/linux/perf_event.h
@@ -888,6 +888,8 @@ extern int perf_max_events;
 
 extern int perf_pmu_register(struct pmu *pmu);
 extern void perf_pmu_unregister(struct pmu *pmu);
+extern void perf_swevent_start_hrtimer(struct perf_event *event);
+extern void perf_swevent_cancel_hrtimer(struct perf_event *event);
 
 extern void perf_event_task_sched_in(struct task_struct *task);
 extern void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next);