linux-kernel - [PATCH 1/2] sched/topology: Annotate RCU pointers properly

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Date: Wed,  3 Jan 2024 13:56:47 +0100
From: Pierre Gondois <pierre.gondois@....com>
To: linux-kernel@...r.kernel.org
Cc: Pierre Gondois <pierre.gondois@....com>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>,
	Mel Gorman <mgorman@...e.de>,
	Daniel Bristot de Oliveira <bristot@...hat.com>,
	Valentin Schneider <vschneid@...hat.com>
Subject: [PATCH 1/2] sched/topology: Annotate RCU pointers properly

Cleanup RCU-related spare errors by annotating RCU pointers.

sched_domains_numa_distance:
  error: incompatible types in comparison expression
  (different address spaces):
      int [noderef] __rcu *
      int *

sched_domains_numa_masks:
  error: incompatible types in comparison expression
  (different address spaces):
      struct cpumask **[noderef] __rcu *
      struct cpumask ***

Signed-off-by: Pierre Gondois <pierre.gondois@....com>
---
 kernel/sched/topology.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 10d1391e7416..0342a4f41f09 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -1542,8 +1542,8 @@ static int			sched_domains_numa_levels;
 static int			sched_domains_curr_level;
 
 int				sched_max_numa_distance;
-static int			*sched_domains_numa_distance;
-static struct cpumask		***sched_domains_numa_masks;
+static int			__rcu *sched_domains_numa_distance;
+static struct cpumask		** __rcu *sched_domains_numa_masks;
 #endif
 
 /*
-- 
2.25.1