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SubjectRe: [PATCH] openrisc: use device tree to determine present cpus
Hi Jan,

On Fri, Jan 29, 2021 at 7:34 PM Jan Henrik Weinstock
<jan.weinstock@rwth-aachen.de> wrote:
> This patch proposes to use the device tree to determine the present cpus
> instead of assuming all CONFIG_NRCPUS are actually present in the system.
>
> Signed-off-by: Jan Henrik Weinstock <jan.weinstock@rwth-aachen.de>

Thanks for your patch!

> --- a/arch/openrisc/kernel/smp.c
> +++ b/arch/openrisc/kernel/smp.c

> @@ -68,14 +69,25 @@ void __init smp_init_cpus(void)
>
> void __init smp_prepare_cpus(unsigned int max_cpus)
> {
> - int i;
> + u32 cpu_id;
> + struct device_node *cpu, *cpus;
>
> /*
> * Initialise the present map, which describes the set of CPUs
> * actually populated at the present time.
> */
> - for (i = 0; i < max_cpus; i++)
> - set_cpu_present(i, true);
> + cpus = of_find_node_by_path("/cpus");
> + for_each_child_of_node(cpus, cpu) {

for_each_of_cpu_node()?

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

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