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

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On 11/7/23 20:29, Russell King (Oracle) wrote:
From: James Morse <james.morse@xxxxxxx>

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@xxxxxxx>
Signed-off-by: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx>
---
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@xxxxxxxxxx>





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