linux-kernel - [PATCH -next 2/3] genirq/affinity: Define tmp_mask as a local variable in irq_do_set

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Date:   Sat, 27 Aug 2022 01:13:50 +0000
From:   Xu Qiang <xuqiang36@...wei.com>
To:     <tglx@...utronix.de>, <frederic@...nel.org>,
        <peterz@...radead.org>, <nitesh@...hat.com>,
        <bigeasy@...utronix.de>, <douliyangs@...il.com>, <maz@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <guohanjun@...wei.com>,
        <weiyongjun1@...wei.com>, <xuqiang36@...wei.com>
Subject: [PATCH -next 2/3] genirq/affinity: Define tmp_mask as a local variable in irq_do_set_affinity

When irq_do_set_affinity is called, tmp_mask saved last time
does not make any sense. it is reassigned before each use,
so it should be defined as a local variable.

Fixes: 33de0aa4bae9 (“genirq: Always limit the affinity to online CPUs”)
Signed-off-by: Xu Qiang <xuqiang36@...wei.com>
---
 kernel/irq/manage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index c3423f552e0b..ae1c7eebdfa6 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -218,7 +218,7 @@ int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask,
 	int ret;
 
 	static DEFINE_RAW_SPINLOCK(tmp_mask_lock);
-	static struct cpumask tmp_mask;
+	struct cpumask tmp_mask;
 
 	if (!chip || !chip->irq_set_affinity)
 		return -EINVAL;
-- 
2.17.1