[PATCH RFC 07/22] drivers: base: Allow parts of GENERIC_CPU_DEVICES to be overridden

[Gavin Shan]

On 11/7/23 20:29, Russell King (Oracle) wrote:
> From: James Morse <james.morse at arm.com>
> 
> 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 at arm.com>
> Signed-off-by: Russell King (Oracle) <rmk+kernel at armlinux.org.uk>
> ---
> Changes since RFC:
>   * Dropped __init from x86/ia64 arch_register_cpu()
> Changes since RFC v2:
>   * Dropped unnecessary Loongarch asm/cpu.h changes
> ---
>   drivers/base/cpu.c  | 14 ++++++++++----
>   include/linux/cpu.h |  4 ++++
>   2 files changed, 14 insertions(+), 4 deletions(-)
> 

Reviewed-by: Gavin Shan <gshan at redhat.com>