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

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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 <yangtiezhu@loongson.cn>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Tiezhu Yang 2020-11-25 18:11:30 +08:00 committed by Thomas Bogendoerfer
parent f0e82242b1
commit cbab54d9c2
3 changed files with 0 additions and 9 deletions
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3
arch/mips/cavium-octeon/smp.c
View File

@ -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;

3
arch/mips/kernel/smp-bmips.c
View File

@ -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);

3
arch/mips/loongson64/smp.c
View File

@ -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);