On Tue, Dec 15, 2020 at 01:07:26PM +0800, Tiezhu Yang wrote:
> 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 cps_cpu_disable(), just remove it.
>
> Reported-by: liwei (GF) <liwei...@huawei.com>
> Signed-off-by: Tiezhu Yang <yangtie...@loongson.cn>
> ---
>
> cps_cpu_disable() is not done in the early similar patch,
> sorry for that.
>
> arch/mips/kernel/smp-cps.c | 3 ---
> 1 file changed, 3 deletions(-)
applied to mips-next.
Thomas.
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Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
