Commit 17c891ab authored Apr 21, 2020 by Muchun Song Committed by Peter Zijlstra Apr 30, 2020

sched/fair: Use __this_cpu_read() in wake_wide()



The code is executed with preemption(and interrupts) disabled,
so it's safe to use __this_cpu_write().

Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200421144123.33580-1-songmuchun@bytedance.com

parent bf2c59fc

kernel/sched/fair.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -5718,7 +5718,7 @@ static int wake_wide(struct task_struct *p)
		{
		unsigned int master = current->wakee_flips;
		unsigned int slave = p->wakee_flips;
		int factor = this_cpu_read(sd_llc_size);
		int factor = __this_cpu_read(sd_llc_size);

		if (master < slave)
		swap(master, slave);

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