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From:   Amol Grover <frextrite@gmail.com>
To:     Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Juri Lelli <juri.lelli@redhat.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>
Cc:     linux-kernel@vger.kernel.org,
        linux-kernel-mentees@lists.linuxfoundation.org,
        Joel Fernandes <joel@joelfernandes.org>,
        Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>,
        "Paul E . McKenney" <paulmck@kernel.org>,
        Amol Grover <frextrite@gmail.com>
Subject: [PATCH] sched: Annotate perf_event_ctxp with __rcu
Date:   Sat,  8 Feb 2020 20:15:51 +0530
Message-Id: <20200208144550.18486-1-frextrite@gmail.com>
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Sender: linux-kernel-owner@vger.kernel.org
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perf_event_ctxp is used in RCU context in kernel/events/core.c,
tell sparse about it as well.

Fix the following instances of sparse error:
kernel/events/core.c:1384:15: error: incompatible types in comparison
kernel/events/core.c:1397:28: error: incompatible types in comparison
kernel/events/core.c:3264:25: error: incompatible types in comparison
kernel/events/core.c:3265:25: error: incompatible types in comparison
kernel/events/core.c:4340:25: error: incompatible types in comparison
kernel/events/core.c:7091:23: error: incompatible types in comparison
kernel/events/core.c:7870:23: error: incompatible types in comparison
kernel/events/core.c:8971:23: error: incompatible types in comparison
kernel/events/core.c:11865:9: error: incompatible types in comparison
kernel/events/core.c:11975:17: error: incompatible types in comparison

Signed-off-by: Amol Grover <frextrite@gmail.com>
---
 include/linux/sched.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 716ad1d8d95e..5df1778cfdf4 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1063,7 +1063,7 @@ struct task_struct {
 	unsigned int			futex_state;
 #endif
 #ifdef CONFIG_PERF_EVENTS
-	struct perf_event_context	*perf_event_ctxp[perf_nr_task_contexts];
+	struct perf_event_context __rcu	*perf_event_ctxp[perf_nr_task_contexts];
 	struct mutex			perf_event_mutex;
 	struct list_head		perf_event_list;
 #endif
-- 
2.24.1