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Wysocki" , Paul Walmsley , Palmer Dabbelt , Albert Ou References: From: Shaoqin Huang In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/7/23 18:29, Russell King (Oracle) wrote: > From: James Morse > > Add arch_unregister_cpu() to allow the ACPI machinery to call > unregister_cpu(). This is enough for arm64, riscv and loongarch, but > needs to be overridden by x86 and ia64 who need to do more work. > > CC: Jean-Philippe Brucker > Signed-off-by: James Morse Reviewed-by: Shaoqin Huang > --- > Changes since v1: > * Added CONFIG_HOTPLUG_CPU ifdeffery around unregister_cpu > Changes since RFC v2: > * Move earlier in the series > --- > drivers/base/cpu.c | 9 ++++++++- > 1 file changed, 8 insertions(+), 1 deletion(-) > > diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c > index 579064fda97b..58bb86091b34 100644 > --- a/drivers/base/cpu.c > +++ b/drivers/base/cpu.c > @@ -531,7 +531,14 @@ int __weak arch_register_cpu(int cpu) > { > return register_cpu(&per_cpu(cpu_devices, cpu), cpu); > } > -#endif > + > +#ifdef CONFIG_HOTPLUG_CPU > +void __weak arch_unregister_cpu(int num) > +{ > + unregister_cpu(&per_cpu(cpu_devices, num)); > +} > +#endif /* CONFIG_HOTPLUG_CPU */ > +#endif /* CONFIG_GENERIC_CPU_DEVICES */ > > static void __init cpu_dev_register_generic(void) > { -- Shaoqin