linux-kernel - [RFC][PATCH v1 15/15] perf: export tracepoint events via sysfs: mac80211

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Date:	Thu, 22 Jul 2010 19:18:16 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	Ingo Molnar <mingo@...e.hu>,
	Johannes Berg <johannes@...solutions.net>
Cc:	Robert Richter <robert.richter@....com>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Johannes Berg <johannes@...solutions.net>,
	Peter Zijlstra <peterz@...radead.org>,
	Greg KH <greg@...ah.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Paul Mundt <lethal@...ux-sh.org>,
	"eranian@...il.com" <eranian@...il.com>,
	"Gary.Mohr@...l.com" <Gary.Mohr@...l.com>,
	"arjan@...ux.intel.com" <arjan@...ux.intel.com>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Paul Mackerras <paulus@...ba.org>,
	"David S. Miller" <davem@...emloft.net>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Will Deacon <will.deacon@....com>,
	Maynard Johnson <mpjohn@...ibm.com>,
	Carl Love <carll@...ibm.com>,
	Kay Sievers <kay.sievers@...y.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: [RFC][PATCH v1 15/15] perf: export tracepoint events via sysfs:
 mac80211

mac80211 tracepoint events are exported like below,

/sys/class/ieee80211/events/
|-- api_beacon_loss
|   |-- config
|   |-- type
....
....
|-- drv_add_interface
|   |-- config
|   |-- type
....
....
|-- stop_queue
|   |-- config
|   |-- type
|-- wake_queue
|   |-- config
|   |-- type
---
 drivers/base/class.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/drivers/base/class.c b/drivers/base/class.c
index 8e231d0..57ada53 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -19,6 +19,7 @@
 #include <linux/slab.h>
 #include <linux/genhd.h>
 #include <linux/mutex.h>
+#include <linux/perf_event.h>
 #include "base.h"
 
 #define to_class_attr(_attr) container_of(_attr, struct class_attribute, attr)
@@ -160,6 +161,14 @@ static void klist_class_dev_put(struct klist_node *n)
 	put_device(dev);
 }
 
+extern struct class ieee80211_class;
+
+static void class_sys_add_tp(struct kobject *class_kobj, struct class *cls)
+{
+	if (cls == &ieee80211_class)
+		perf_sys_add_tp(class_kobj, "mac80211");
+}
+
 int __class_register(struct class *cls, struct lock_class_key *key)
 {
 	struct class_private *cp;
@@ -202,6 +211,9 @@ int __class_register(struct class *cls, struct lock_class_key *key)
 	}
 	error = add_class_attrs(class_get(cls));
 	class_put(cls);
+
+	class_sys_add_tp(&cp->class_subsys.kobj, cls);
+
 	return error;
 }
 EXPORT_SYMBOL_GPL(__class_register);



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