mirror of https://gitee.com/openkylin/linux.git
MIPS: No need to check CPU 0 in {loongson3,bmips,octeon}_cpu_disable()
After commit 9cce844abf
("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:
parent
f0e82242b1
commit
cbab54d9c2
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@ -290,9 +290,6 @@ static int octeon_cpu_disable(void)
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{
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unsigned int cpu = smp_processor_id();
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if (cpu == 0)
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return -EBUSY;
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if (!octeon_bootloader_entry_addr)
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return -ENOTSUPP;
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@ -362,9 +362,6 @@ static int bmips_cpu_disable(void)
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{
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unsigned int cpu = smp_processor_id();
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if (cpu == 0)
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return -EBUSY;
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pr_info("SMP: CPU%d is offline\n", cpu);
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set_cpu_online(cpu, false);
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@ -544,9 +544,6 @@ static int loongson3_cpu_disable(void)
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unsigned long flags;
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unsigned int cpu = smp_processor_id();
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if (cpu == 0)
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return -EBUSY;
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set_cpu_online(cpu, false);
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calculate_cpu_foreign_map();
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local_irq_save(flags);
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