From: James Morse james.morse@arm.com
mainline inclusion from mainline-v6.8-rc1 commit 866ec3008691ff205b171413c52c5f1f328a2f8b category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8XMTL CVE: NA
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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 Signed-off-by: liwei liwei728@huawei.com --- 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 22625695f310..d32f7937f954 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) {