Commit cbab54d9 authored Nov 25, 2020 by Tiezhu Yang Committed by Thomas Bogendoerfer Nov 27, 2020

MIPS: No need to check CPU 0 in {loongson3,bmips,octeon}_cpu_disable()



After commit 9cce844a ("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 <yangtiezhu@loongson.cn>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

parent f0e82242

arch/mips/cavium-octeon/smp.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -290,9 +290,6 @@ static int octeon_cpu_disable(void)
		{
		unsigned int cpu = smp_processor_id();

		if (cpu == 0)
		return -EBUSY;

		if (!octeon_bootloader_entry_addr)
		return -ENOTSUPP;

arch/mips/kernel/smp-bmips.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -362,9 +362,6 @@ static int bmips_cpu_disable(void)
		{
		unsigned int cpu = smp_processor_id();

		if (cpu == 0)
		return -EBUSY;

		pr_info("SMP: CPU%d is offline\n", cpu);

		set_cpu_online(cpu, false);

arch/mips/loongson64/smp.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -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);

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