From: Yury Norov <yury.norov@gmail.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
Valentin Schneider <valentin.schneider@arm.com>,
Vincent Donnefort <vincent.donnefort@arm.com>,
Ingo Molnar <mingo@kernel.org>,
YueHaibing <yuehaibing@huawei.com>,
Yuan ZhaoXiong <yuanzhaoxiong@baidu.com>,
Randy Dunlap <rdunlap@infradead.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Yury Norov <yury.norov@gmail.com>
Subject: [PATCH] kernel/cpu.c: fix init_cpu_online
Date: Sun, 30 Jan 2022 17:46:48 -0800 [thread overview]
Message-ID: <20220131014648.941629-1-yury.norov@gmail.com> (raw)
cpu_online_mask has an associate counter of online cpus, which must be
initialized in init_cpu_online().
Fixes: 0c09ab96fc82010 (cpu/hotplug: Cache number of online CPUs)
Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
kernel/cpu.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 407a2568f35e..cd7605204d4d 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -2616,6 +2616,7 @@ void init_cpu_possible(const struct cpumask *src)
void init_cpu_online(const struct cpumask *src)
{
cpumask_copy(&__cpu_online_mask, src);
+ atomic_set(&__num_online_cpus, cpumask_weight(cpu_online_mask));
}
void set_cpu_online(unsigned int cpu, bool online)
--
2.30.2
next reply other threads:[~2022-01-31 1:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-31 1:46 Yury Norov [this message]
2022-01-31 11:19 ` [PATCH] kernel/cpu.c: fix init_cpu_online Vincent Donnefort
2022-02-01 18:30 ` Yury Norov
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