linux-kernel - Re: [PATCH RFC 16/22] x86/topology: use weak version of arch_unregister

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Message-ID: <fa717944-2f92-48f6-ad70-1c58ffe61b86@redhat.com>
Date:   Mon, 13 Nov 2023 14:16:29 +1000
From:   Gavin Shan <gshan@...hat.com>
To:     "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        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
Cc:     Salil Mehta <salil.mehta@...wei.com>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        jianyong.wu@....com, justin.he@....com,
        James Morse <james.morse@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH RFC 16/22] x86/topology: use weak version of
 arch_unregister_cpu()

On 11/7/23 20:30, Russell King (Oracle) wrote:
> Since the x86 version of arch_unregister_cpu() is the same as the weak
> version, drop the x86 specific version.
> 
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> ---
> Changes since RFC v3:
>   * Adapt to removal of EXPORT_SYMBOL()s
> ---
>   arch/x86/kernel/topology.c | 5 -----
>   1 file changed, 5 deletions(-)
> 

PATCH[16/22] can be folded to PATCH[15/22] since arch_unregister_cpu() was just
added in PATCH[15/22]. Anyway, the changes make sense to me.

Reviewed-by: Gavin Shan <gshan@...hat.com>

> diff --git a/arch/x86/kernel/topology.c b/arch/x86/kernel/topology.c
> index c2ed3145a93b..211863cb5b81 100644
> --- a/arch/x86/kernel/topology.c
> +++ b/arch/x86/kernel/topology.c
> @@ -43,9 +43,4 @@ int arch_register_cpu(int cpu)
>   	c->hotpluggable = cpu > 0;
>   	return register_cpu(c, cpu);
>   }
> -
> -void arch_unregister_cpu(int num)
> -{
> -	unregister_cpu(&per_cpu(cpu_devices, num));
> -}
>   #endif /* CONFIG_HOTPLUG_CPU */