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* [PATCH] sched: Annotate perf_event_ctxp with __rcu
@ 2020-02-08 14:45 ` Amol Grover
  0 siblings, 0 replies; 2+ messages in thread
From: Amol Grover @ 2020-02-08 14:45 UTC (permalink / raw)
  To: Ingo Molnar, Peter Zijlstra, Juri Lelli, Vincent Guittot,
	Dietmar Eggemann, Steven Rostedt, Ben Segall, Mel Gorman
  Cc: linux-kernel, linux-kernel-mentees, Joel Fernandes,
	Madhuparna Bhowmik, Paul E . McKenney, Amol Grover

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


^ permalink raw reply related	[flat|nested] 2+ messages in thread
* [Linux-kernel-mentees] [PATCH] sched: Annotate perf_event_ctxp with __rcu
@ 2020-02-08 14:45 ` Amol Grover
  0 siblings, 0 replies; 2+ messages in thread
From: Amol Grover @ 2020-02-08 14:45 UTC (permalink / raw)
  To: Ingo Molnar, Peter Zijlstra, Juri Lelli, Vincent Guittot,
	Dietmar Eggemann, Steven Rostedt, Ben Segall, Mel Gorman
  Cc: Paul E . McKenney, linux-kernel, Madhuparna Bhowmik,
	Joel Fernandes, linux-kernel-mentees

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

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^ permalink raw reply related	[flat|nested] 2+ messages in thread
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