linux-kernel - [PATCH RFC tip/core/rcu 09/30] perf_event: _

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Message-Id: <1279138204-12849-9-git-send-email-paulmck@linux.vnet.ibm.com>
Date:	Wed, 14 Jul 2010 13:09:43 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...e.hu, laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...ymtl.ca,
	josh@...htriplett.org, dvhltc@...ibm.com, niv@...ibm.com,
	tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
	Valdis.Kletnieks@...edu, dhowells@...hat.com,
	eric.dumazet@...il.com, Arnd Bergmann <arnd@...db.de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH RFC tip/core/rcu 09/30] perf_event: __rcu annotations

From: Arnd Bergmann <arnd@...db.de>

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 include/linux/perf_event.h |    6 +++---
 include/linux/sched.h      |    2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 5d0266d..b30ee92 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -645,7 +645,7 @@ struct perf_event {
 	struct hlist_node		hlist_entry;
 	int				nr_siblings;
 	int				group_flags;
-	struct perf_event		*group_leader;
+	struct perf_event __rcu		*group_leader;
 	const struct pmu		*pmu;
 
 	enum perf_event_active_state	state;
@@ -709,7 +709,7 @@ struct perf_event {
 	atomic_t			mmap_count;
 	int				mmap_locked;
 	struct user_struct		*mmap_user;
-	struct perf_mmap_data		*data;
+	struct perf_mmap_data __rcu	*data;
 
 	/* poll related */
 	wait_queue_head_t		waitq;
@@ -777,7 +777,7 @@ struct perf_event_context {
 	 * These fields let us detect when two contexts have both
 	 * been cloned (inherited) from a common ancestor.
 	 */
-	struct perf_event_context	*parent_ctx;
+	struct perf_event_context __rcu *parent_ctx;
 	u64				parent_gen;
 	u64				generation;
 	int				pin_count;
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 9a2d9a0..26b85fe 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1440,7 +1440,7 @@ struct task_struct {
 	struct futex_pi_state *pi_state_cache;
 #endif
 #ifdef CONFIG_PERF_EVENTS
-	struct perf_event_context *perf_event_ctxp;
+	struct perf_event_context __rcu *perf_event_ctxp;
 	struct mutex perf_event_mutex;
 	struct list_head perf_event_list;
 #endif
-- 
1.7.0.6

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