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drivers: base: Implement weak arch_unregister_cpu()

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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 <jean-philippe@linaro.org>
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Shaoqin Huang <shahuang@redhat.com>
Signed-off-by: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/E1r5R3H-00CszC-2n@rmk-PC.armlinux.org.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
James Morse 2023-11-21 13:44:31 +00:00 committed by Greg Kroah-Hartman
parent 0949dd96df
commit 866ec30086
1 changed files with 8 additions and 1 deletions
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9
drivers/base/cpu.c
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@ -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)
{