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LoongArch: Use the __weak version of arch_unregister_cpu()

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LoongArch provides its own arch_unregister_cpu(). This clears the
hotpluggable flag, then unregisters the CPU.

It isn't necessary to clear the hotpluggable flag when unregistering
a cpu. unregister_cpu() writes NULL to the percpu cpu_sys_devices
pointer, meaning cpu_is_hotpluggable() will return false, as
get_cpu_device() has returned NULL.

Remove arch_unregister_cpu() and use the __weak version.

Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/E1r5R46-00Ct0A-GJ@rmk-PC.armlinux.org.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
James Morse 2023-11-21 13:45:22 +00:00 committed by Greg Kroah-Hartman
parent db3ba29a83
commit 0d122fb600
1 changed files with 0 additions and 8 deletions
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8
arch/loongarch/kernel/topology.c
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@ -18,12 +18,4 @@ int arch_register_cpu(int cpu)
c->hotpluggable = !io_master(cpu);
return register_cpu(c, cpu);
}
void arch_unregister_cpu(int cpu)
{
struct cpu *c = &per_cpu(cpu_devices, cpu);
c->hotpluggable = 0;
unregister_cpu(c);
}
#endif