linux-kernel - [PATCH V2 2/5] genirq/affinity: mark 'node_to_cpumask' as const for get_nodes_in

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Message-Id: <20180305031357.23950-3-ming.lei@redhat.com>
Date:   Mon,  5 Mar 2018 11:13:54 +0800
From:   Ming Lei <ming.lei@...hat.com>
To:     Jens Axboe <axboe@...nel.dk>,
        Christoph Hellwig <hch@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org
Cc:     linux-block@...r.kernel.org,
        Laurence Oberman <loberman@...hat.com>,
        Ming Lei <ming.lei@...hat.com>, Christoph Hellwig <hch@....de>
Subject: [PATCH V2 2/5] genirq/affinity: mark 'node_to_cpumask' as const for get_nodes_in_cpumask()

Inside irq_create_affinity_masks(), once 'node_to_cpumask' is created,
it is accessed read-only, so mark it as const for
get_nodes_in_cpumask().

Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Christoph Hellwig <hch@....de>
Signed-off-by: Ming Lei <ming.lei@...hat.com>
---
 kernel/irq/affinity.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c
index 4b1c4763212d..9f49d6ef0dc8 100644
--- a/kernel/irq/affinity.c
+++ b/kernel/irq/affinity.c
@@ -79,7 +79,7 @@ static void build_node_to_cpumask(cpumask_var_t *masks)
 		cpumask_set_cpu(cpu, masks[cpu_to_node(cpu)]);
 }
 
-static int get_nodes_in_cpumask(cpumask_var_t *node_to_cpumask,
+static int get_nodes_in_cpumask(const cpumask_var_t *node_to_cpumask,
 				const struct cpumask *mask, nodemask_t *nodemsk)
 {
 	int n, nodes = 0;
-- 
2.9.5