linux-kernel - Re: [PATCH RFC 22/22] riscv: convert to use arch_cpu_is

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Date:   Tue, 07 Nov 2023 09:48:09 -0800 (PST)
From:   Palmer Dabbelt <palmer@...belt.com>
To:     rmk+kernel@...linux.org.uk
CC:     linux-pm@...r.kernel.org, loongarch@...ts.linux.dev,
        linux-acpi@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, kvmarm@...ts.linux.dev,
        x86@...nel.org, linux-csky@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-ia64@...r.kernel.org,
        linux-parisc@...r.kernel.org, salil.mehta@...wei.com,
        jean-philippe@...aro.org, jianyong.wu@....com, justin.he@....com,
        james.morse@....com, Paul Walmsley <paul.walmsley@...ive.com>,
        aou@...s.berkeley.edu
Subject:     Re: [PATCH RFC 22/22] riscv: convert to use arch_cpu_is_hotpluggable()

On Tue, 07 Nov 2023 02:31:11 PST (-0800), rmk+kernel@...linux.org.uk wrote:
> Convert riscv to use the arch_cpu_is_hotpluggable() helper rather than
> arch_register_cpu().
>
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> ---
>  arch/riscv/kernel/setup.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
> index f8875ae1b0aa..168f0db63d53 100644
> --- a/arch/riscv/kernel/setup.c
> +++ b/arch/riscv/kernel/setup.c
> @@ -294,12 +294,9 @@ void __init setup_arch(char **cmdline_p)
>  	riscv_set_dma_cache_alignment();
>  }
>
> -int arch_register_cpu(int cpu)
> +bool arch_cpu_is_hotpluggable(int cpu)
>  {
> -	struct cpu *c = &per_cpu(cpu_devices, cpu);
> -
> -	c->hotpluggable = cpu_has_hotplug(cpu);
> -	return register_cpu(c, cpu);
> +	return cpu_has_hotplug(cpu);
>  }
>
>  void free_initmem(void)

Acked-by: Palmer Dabbelt <palmer@...osinc.com>