diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2023-11-03 15:10:48 +0000 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2023-12-11 09:43:11 +0000 |
| commit | 8f35954c8032cd3480eda3b217ffffbe6ed19fa6 (patch) | |
| tree | a8934c734389ea0f4ed0b287079db247eafd0f8b | |
| parent | f79a0fbc30c46f97f283861aafe4edfa567cc576 (diff) | |
drivers: base: add arch_cpu_is_hotpluggable()
The differences between architecture specific implementations of
arch_register_cpu() are down to whether the CPU is hotpluggable or not.
Rather than overriding the weak version of arch_register_cpu(), provide
a function that can be used to provide this detail instead.
Reviewed-by: Shaoqin Huang <shahuang@redhat.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | drivers/base/cpu.c | 11 | ||||
| -rw-r--r-- | include/linux/cpu.h | 1 |
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index d32f7937f954..f12f3bc4a6ca 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -527,9 +527,18 @@ EXPORT_SYMBOL_GPL(cpu_is_hotpluggable); #ifdef CONFIG_GENERIC_CPU_DEVICES DEFINE_PER_CPU(struct cpu, cpu_devices); +bool __weak arch_cpu_is_hotpluggable(int cpu) +{ + return false; +} + int __weak arch_register_cpu(int cpu) { - return register_cpu(&per_cpu(cpu_devices, cpu), cpu); + struct cpu *c = &per_cpu(cpu_devices, cpu); + + c->hotpluggable = arch_cpu_is_hotpluggable(cpu); + + return register_cpu(c, cpu); } #ifdef CONFIG_HOTPLUG_CPU diff --git a/include/linux/cpu.h b/include/linux/cpu.h index 1e982d63eae8..dcb89c987164 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -80,6 +80,7 @@ extern __printf(4, 5) struct device *cpu_device_create(struct device *parent, void *drvdata, const struct attribute_group **groups, const char *fmt, ...); +extern bool arch_cpu_is_hotpluggable(int cpu); extern int arch_register_cpu(int cpu); extern void arch_unregister_cpu(int cpu); #ifdef CONFIG_HOTPLUG_CPU |