linux-kernel - [PATCH 3/9] perf/x86: Add is_hardware

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Date:	Thu, 16 Jul 2015 16:33:45 -0400
From:	kan.liang@...el.com
To:	a.p.zijlstra@...llo.nl
Cc:	mingo@...hat.com, acme@...nel.org, eranian@...gle.com,
	ak@...ux.intel.com, mark.rutland@....com, adrian.hunter@...el.com,
	dsahern@...il.com, jolsa@...nel.org, namhyung@...nel.org,
	linux-kernel@...r.kernel.org, Kan Liang <kan.liang@...el.com>
Subject: [PATCH 3/9] perf/x86: Add is_hardware_event

From: Kan Liang <kan.liang@...el.com>

Using is_hardware_event to replace !is_software_event to indicate a
hardware event.

Signed-off-by: Kan Liang <kan.liang@...el.com>
---
 include/linux/perf_event.h | 7 ++++++-
 kernel/events/core.c       | 6 +++---
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 2027809..fea0ddf 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -761,13 +761,18 @@ static inline bool is_sampling_event(struct perf_event *event)
 }
 
 /*
- * Return 1 for a software event, 0 for a hardware event
+ * Return 1 for a software event, 0 for other event
  */
 static inline int is_software_event(struct perf_event *event)
 {
 	return event->pmu->task_ctx_nr == perf_sw_context;
 }
 
+static inline int is_hardware_event(struct perf_event *event)
+{
+	return event->pmu->task_ctx_nr == perf_hw_context;
+}
+
 extern struct static_key perf_swevent_enabled[PERF_COUNT_SW_MAX];
 
 extern void ___perf_sw_event(u32, u64, struct pt_regs *, u64);
diff --git a/kernel/events/core.c b/kernel/events/core.c
index d3dae34..9077867 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -1347,7 +1347,7 @@ static void perf_group_attach(struct perf_event *event)
 	WARN_ON_ONCE(group_leader->ctx != event->ctx);
 
 	if (group_leader->group_flags & PERF_GROUP_SOFTWARE &&
-			!is_software_event(event))
+			is_hardware_event(event))
 		group_leader->group_flags &= ~PERF_GROUP_SOFTWARE;
 
 	list_add_tail(&event->group_entry, &group_leader->sibling_list);
@@ -1553,7 +1553,7 @@ event_sched_out(struct perf_event *event,
 	event->pmu->del(event, 0);
 	event->oncpu = -1;
 
-	if (!is_software_event(event))
+	if (is_hardware_event(event))
 		cpuctx->active_oncpu--;
 	if (!--ctx->nr_active)
 		perf_event_ctx_deactivate(ctx);
@@ -1881,7 +1881,7 @@ event_sched_in(struct perf_event *event,
 		goto out;
 	}
 
-	if (!is_software_event(event))
+	if (is_hardware_event(event))
 		cpuctx->active_oncpu++;
 	if (!ctx->nr_active++)
 		perf_event_ctx_activate(ctx);
-- 
1.8.3.1

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