linux-kernel - [PATCH] sched.h: Annotate curr pointer in rq with _

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Date:   Sat,  1 Feb 2020 18:28:03 +0530
From:   madhuparnabhowmik10@...il.com
To:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com
Cc:     linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        rcu@...r.kernel.org, joel@...lfernandes.org, paulmck@...nel.org,
        Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>
Subject: [PATCH] sched.h: Annotate curr pointer in rq with __rcu

From: Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>

This patch fixes the following sparse errors in sched/core.c
and sched/membarrier.c
:
kernel/sched/core.c:2372:27: error: incompatible types in comparison expression
kernel/sched/core.c:4061:17: error: incompatible types in comparison expression
kernel/sched/core.c:6067:9: error: incompatible types in comparison expression
kernel/sched/membarrier.c:108:21: error: incompatible types in comparison expression
kernel/sched/membarrier.c:177:21: error: incompatible types in comparison expression
kernel/sched/membarrier.c:243:21: error: incompatible types in comparison expression

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>
---
 kernel/sched/sched.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 280a3c735935..97b1396b6008 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -896,7 +896,7 @@ struct rq {
 	 */
 	unsigned long		nr_uninterruptible;
 
-	struct task_struct	*curr;
+	struct task_struct __rcu	*curr;
 	struct task_struct	*idle;
 	struct task_struct	*stop;
 	unsigned long		next_balance;
-- 
2.17.1