linux-kernel - Re: [RFC PATCH v2 03/35] drivers: base: Allow parts of GENERIC_CPU

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Message-ID: <ZQLFRQActkL7ke+l@shell.armlinux.org.uk>
Date:   Thu, 14 Sep 2023 09:33:09 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     James Morse <james.morse@....com>
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, Salil Mehta <salil.mehta@...wei.com>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        jianyong.wu@....com, justin.he@....com
Subject: Re: [RFC PATCH v2 03/35] drivers: base: Allow parts of
 GENERIC_CPU_DEVICES to be overridden

On Wed, Sep 13, 2023 at 04:37:51PM +0000, James Morse wrote:
> Architectures often have extra per-cpu work that needs doing
> before a CPU is registered, often to determine if a CPU is
> hotpluggable.
> 
> To allow the ACPI architectures to use GENERIC_CPU_DEVICES, move
> the cpu_register() call into arch_register_cpu(), which is made __weak
> so architectures with extra work can override it.
> This aligns with the way x86, ia64 and loongarch register hotplug CPUs
> when they become present.
> 
> Signed-off-by: James Morse <james.morse@....com>

LGTM.

Reviewed-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>

-- 
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