From cbab54d9c2b2a73abe541790df28add14b2385bd Mon Sep 17 00:00:00 2001 From: Tiezhu Yang Date: Wed, 25 Nov 2020 18:11:30 +0800 Subject: MIPS: No need to check CPU 0 in {loongson3,bmips,octeon}_cpu_disable() After commit 9cce844abf07 ("MIPS: CPU#0 is not hotpluggable"), c->hotpluggable is 0 for CPU 0 and it will not generate a control file in sysfs for this CPU: [root@linux loongson]# cat /sys/devices/system/cpu/cpu0/online cat: /sys/devices/system/cpu/cpu0/online: No such file or directory [root@linux loongson]# echo 0 > /sys/devices/system/cpu/cpu0/online bash: /sys/devices/system/cpu/cpu0/online: Permission denied So no need to check CPU 0 in {loongson3,bmips,octeon}_cpu_disable(), just remove them. Signed-off-by: Tiezhu Yang Acked-by: Florian Fainelli Signed-off-by: Thomas Bogendoerfer --- arch/mips/loongson64/smp.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'arch/mips/loongson64/smp.c') diff --git a/arch/mips/loongson64/smp.c b/arch/mips/loongson64/smp.c index aa0cd723e61d..b8c1fc3158fd 100644 --- a/arch/mips/loongson64/smp.c +++ b/arch/mips/loongson64/smp.c @@ -544,9 +544,6 @@ static int loongson3_cpu_disable(void) unsigned long flags; unsigned int cpu = smp_processor_id(); - if (cpu == 0) - return -EBUSY; - set_cpu_online(cpu, false); calculate_cpu_foreign_map(); local_irq_save(flags); -- cgit