linux-kernel - [tip:sched/core] sched/core: Annotate perf_domain pointer with _

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Message-ID: <tip-2e7d58babd2a6073d1afb38519e246dd4a423da5@git.kernel.org>
Date:   Wed, 3 Apr 2019 01:41:22 -0700
From:   "tip-bot for Joel Fernandes (Google)" <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     peterz@...radead.org, paulmck@...ux.ibm.com,
        torvalds@...ux-foundation.org, hpa@...or.com, efault@....de,
        mingo@...nel.org, morten.rasmussen@....com, josh@...htriplett.org,
        linux-kernel@...r.kernel.org, mathieu.desnoyers@...icios.com,
        joel@...lfernandes.org, jiangshanlai@...il.com,
        luc.vanoostenryck@...il.com, tglx@...utronix.de,
        rostedt@...dmis.org
Subject: [tip:sched/core] sched/core: Annotate perf_domain pointer with
 __rcu

Commit-ID:  2e7d58babd2a6073d1afb38519e246dd4a423da5
Gitweb:     https://git.kernel.org/tip/2e7d58babd2a6073d1afb38519e246dd4a423da5
Author:     Joel Fernandes (Google) <joel@...lfernandes.org>
AuthorDate: Wed, 20 Mar 2019 20:34:26 -0400
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 3 Apr 2019 09:51:04 +0200

sched/core: Annotate perf_domain pointer with __rcu

This fixes the following sparse errors in sched/fair.c:

  fair.c:6506:14: error: incompatible types in comparison expression
  fair.c:8642:21: error: incompatible types in comparison expression

Using __rcu will also help sparse catch any future bugs.

Signed-off-by: Joel Fernandes (Google) <joel@...lfernandes.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
[ From an RCU perspective. ]
Reviewed-by: Paul E. McKenney <paulmck@...ux.ibm.com>
Cc: Josh Triplett <josh@...htriplett.org>
Cc: Lai Jiangshan <jiangshanlai@...il.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Mike Galbraith <efault@....de>
Cc: Morten Rasmussen <morten.rasmussen@....com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: keescook@...omium.org
Cc: kernel-hardening@...ts.openwall.com
Cc: kernel-team@...roid.com
Link: https://lkml.kernel.org/r/20190321003426.160260-5-joel@joelfernandes.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 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 2b452d68ab2e..b52ed1ada0be 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -780,7 +780,7 @@ struct root_domain {
 	 * NULL-terminated list of performance domains intersecting with the
 	 * CPUs of the rd. Protected by RCU.
 	 */
-	struct perf_domain	*pd;
+	struct perf_domain __rcu *pd;
 };
 
 extern struct root_domain def_root_domain;