Now that GENERIC_CPU_DEVICES calls arch_register_cpu(), which can be
overridden by the arch code, switch over to this to allow common code
to choose when the register_cpu() call is made.
x86's struct cpus come from struct x86_cpu, which has no other members
or users. Remove this and use the version defined by common code.
This is an intermediate step to the logic being moved to drivers/acpi,
where GENERIC_CPU_DEVICES will do the work when booting with acpi=off.
Signed-off-by: James Morse <james.morse@arm.com>
----
Changes since RFC:
* Fixed the second copy of arch_register_cpu() used for non-hotplug
---
arch/x86/Kconfig | 1 +
arch/x86/include/asm/cpu.h | 4 ----
arch/x86/kernel/topology.c | 25 ++++++-------------------
3 files changed, 7 insertions(+), 23 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index a0100a1ab4a0..133ea5f561b5 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -148,6 +148,7 @@ config X86
select GENERIC_CLOCKEVENTS_MIN_ADJUST
select GENERIC_CMOS_UPDATE
select GENERIC_CPU_AUTOPROBE
+ select GENERIC_CPU_DEVICES
select GENERIC_CPU_VULNERABILITIES
select GENERIC_EARLY_IOREMAP
select GENERIC_ENTRY
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
index 96dc4665e87d..f349c94510e8 100644
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -23,10 +23,6 @@ static inline void prefill_possible_map(void) {}
#endif /* CONFIG_SMP */
-struct x86_cpu {
- struct cpu cpu;
-};
-
#ifdef CONFIG_HOTPLUG_CPU
extern void arch_unregister_cpu(int);
extern void soft_restart_cpu(void);
diff --git a/arch/x86/kernel/topology.c b/arch/x86/kernel/topology.c
index 0bab03130033..ca08a1d138f0 100644
--- a/arch/x86/kernel/topology.c
+++ b/arch/x86/kernel/topology.c
@@ -35,38 +35,25 @@
#include <asm/io_apic.h>
#include <asm/cpu.h>
-static DEFINE_PER_CPU(struct x86_cpu, cpu_devices);
-
#ifdef CONFIG_HOTPLUG_CPU
int arch_register_cpu(int cpu)
{
- struct x86_cpu *xc = per_cpu_ptr(&cpu_devices, cpu);
+ struct cpu *c = per_cpu_ptr(&cpu_devices, cpu);
- xc->cpu.hotpluggable = cpu > 0;
- return register_cpu(&xc->cpu, cpu);
+ c->hotpluggable = cpu > 0;
+ return register_cpu(c, cpu);
}
EXPORT_SYMBOL(arch_register_cpu);
void arch_unregister_cpu(int num)
{
- unregister_cpu(&per_cpu(cpu_devices, num).cpu);
+ unregister_cpu(&per_cpu(cpu_devices, num));
}
EXPORT_SYMBOL(arch_unregister_cpu);
#else /* CONFIG_HOTPLUG_CPU */
-int __init arch_register_cpu(int num)
+int arch_register_cpu(int num)
{
- return register_cpu(&per_cpu(cpu_devices, num).cpu, num);
+ return register_cpu(&per_cpu(cpu_devices, num), num);
}
#endif /* CONFIG_HOTPLUG_CPU */
-
-static int __init topology_init(void)
-{
- int i;
-
- for_each_present_cpu(i)
- arch_register_cpu(i);
-
- return 0;
-}
-subsys_initcall(topology_init);
--
2.39.2