Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 573619d1 authored by Russell King's avatar Russell King
Browse files

ARM: SMP: wait for CPU to be marked active 



When we bring a CPU online, we should wait for it to become active
before entering the idle thread, so we know that the scheduler and
thread migration is going to work.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 9a00318e

arch/arm/kernel/smp.c

+5 −1
Original line number Diff line number Diff line
@@ -318,9 +318,13 @@ asmlinkage void __cpuinit secondary_start_kernel(void) 
	smp_store_cpu_info(cpu);



	/*

	 * OK, now it's safe to let the boot CPU continue

	 * OK, now it's safe to let the boot CPU continue.  Wait for

	 * the CPU migration code to notice that the CPU is online

	 * before we continue.

	 */

	set_cpu_online(cpu, true);

	while (!cpu_active(cpu))

		cpu_relax();



	/*

	 * OK, it's off to the idle thread for us