linux-kernel - [tip: sched/urgent] sched/core: Annotate curr pointer in rq with _

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Date:   Tue, 11 Feb 2020 12:47:47 -0000
From:   "tip-bot2 for Madhuparna Bhowmik" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: sched/urgent] sched/core: Annotate curr pointer in rq with __rcu

The following commit has been merged into the sched/urgent branch of tip:

Commit-ID:     4104a562e0ca62e971089db9d3c47794a0d7d4eb
Gitweb:        https://git.kernel.org/tip/4104a562e0ca62e971089db9d3c47794a0d7d4eb
Author:        Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>
AuthorDate:    Sat, 01 Feb 2020 18:28:03 +05:30
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 11 Feb 2020 13:00:37 +01:00

sched/core: Annotate curr pointer in rq with __rcu

This patch fixes the following sparse warnings 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>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Link: https://lkml.kernel.org/r/20200201125803.20245-1-madhuparnabhowmik10@gmail.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 5876e6b..9ea6478 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;