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From:   Valentin Schneider <valentin.schneider@arm.com>
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Subject: Re: [PATCH 04/12] arch_topology: Reset all cpus in reset_cpu_topology
In-reply-to: <20200408113505.2528103-5-jiaxun.yang@flygoat.com>
Date:   Wed, 08 Apr 2020 19:23:30 +0100
Message-ID: <jhjpnchj0pp.mognet@arm.com>
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On 08/04/20 12:34, Jiaxun Yang wrote:
> For MIPS platform, when topology isn't probed by DeviceTree,
> possible_cpu might be empty when calling init_cpu_topology,
> that may result cpu_topology not fully reseted for all CPUs.
> So here we can reset all cpus instead of possible cpus.
>
> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> ---
>  drivers/base/arch_topology.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
> index 9c2405d08dae..3398b7ac7dfb 100644
> --- a/drivers/base/arch_topology.c
> +++ b/drivers/base/arch_topology.c
> @@ -542,7 +542,7 @@ void __init reset_cpu_topology(void)
>  {
>       unsigned int cpu;
>
> -	for_each_possible_cpu(cpu) {
> +	for (cpu = 0; cpu < NR_CPUS; cpu++) {

Hmph, kind of a shame but if you really have to do it then perhaps you
should go with ARRAY_SIZE(cpu_topology) instead.

>               struct cpu_topology *cpu_topo = &cpu_topology[cpu];
>
>               cpu_topo->thread_id = -1;