From: "tip-bot2 for Yuan ZhaoXiong" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Yuan ZhaoXiong <yuanzhaoxiong@baidu.com>,
Thomas Gleixner <tglx@linutronix.de>,
Valentin Schneider <valentin.schneider@arm.com>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: smp/core] cpu/hotplug: Simplify access to percpu cpuhp_state
Date: Tue, 25 May 2021 15:30:04 -0000 [thread overview]
Message-ID: <162195660432.29796.7925067914385420402.tip-bot2@tip-bot2> (raw)
In-Reply-To: <1621776690-13264-1-git-send-email-yuanzhaoxiong@baidu.com>
The following commit has been merged into the smp/core branch of tip:
Commit-ID: 130708331bc6b03a3c3a78599333faddfebbd0f3
Gitweb: https://git.kernel.org/tip/130708331bc6b03a3c3a78599333faddfebbd0f3
Author: Yuan ZhaoXiong <yuanzhaoxiong@baidu.com>
AuthorDate: Sun, 23 May 2021 21:31:30 +08:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Tue, 25 May 2021 17:24:52 +02:00
cpu/hotplug: Simplify access to percpu cpuhp_state
It is unnecessary to invoke per_cpu_ptr() everytime to access cpuhp_state.
Use the available pointer instead.
Signed-off-by: Yuan ZhaoXiong <yuanzhaoxiong@baidu.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Link: https://lore.kernel.org/r/1621776690-13264-1-git-send-email-yuanzhaoxiong@baidu.com
---
kernel/cpu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/cpu.c b/kernel/cpu.c
index e538518..2942cb4 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -961,7 +961,7 @@ static int takedown_cpu(unsigned int cpu)
int err;
/* Park the smpboot threads */
- kthread_park(per_cpu_ptr(&cpuhp_state, cpu)->thread);
+ kthread_park(st->thread);
/*
* Prevent irq alloc/free while the dying cpu reorganizes the
@@ -977,7 +977,7 @@ static int takedown_cpu(unsigned int cpu)
/* CPU refused to die */
irq_unlock_sparse();
/* Unpark the hotplug thread so we can rollback there */
- kthread_unpark(per_cpu_ptr(&cpuhp_state, cpu)->thread);
+ kthread_unpark(st->thread);
return err;
}
BUG_ON(cpu_online(cpu));
prev parent reply other threads:[~2021-05-25 15:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-23 13:31 [PATCH] cpu/hotplug: simplify access percpu cpuhp_state Yuan ZhaoXiong
2021-05-25 10:19 ` Valentin Schneider
2021-05-25 15:30 ` tip-bot2 for Yuan ZhaoXiong [this message]
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