From cef020a889d452d601d82fe514750497cb3865f5 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Wed, 8 Apr 2009 15:01:29 +0200
Subject: [PATCH] --- yaml --- r: 147349 b: refs/heads/master c:
 8740f9418c78dcad694b46ab25d1645d5aef1f5e h: refs/heads/master i:   147347:
 6e1159188fb0a35710ea74aa10a2d662e90e093f v: v3

---
 [refs]                             |  2 +-
 trunk/include/linux/perf_counter.h | 10 ++++++----
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/[refs] b/[refs]
index de63b296ed4d..4e82f06716ac 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 808382b33bb4c60df6379ec2db39f332cc56b82a
+refs/heads/master: 8740f9418c78dcad694b46ab25d1645d5aef1f5e
diff --git a/trunk/include/linux/perf_counter.h b/trunk/include/linux/perf_counter.h
index 4809ae18a940..8bf764fc6220 100644
--- a/trunk/include/linux/perf_counter.h
+++ b/trunk/include/linux/perf_counter.h
@@ -344,10 +344,12 @@ struct file;
 
 struct perf_mmap_data {
 	struct rcu_head			rcu_head;
-	int				nr_pages;
-	atomic_t			wakeup;
-	atomic_t			head;
-	atomic_t			events;
+	int				nr_pages;	/* nr of data pages  */
+
+	atomic_t			wakeup;		/* POLL_ for wakeups */
+	atomic_t			head;		/* write position    */
+	atomic_t			events;		/* event limit       */
+
 	struct perf_counter_mmap_page   *user_page;
 	void 				*data_pages[0];
 };