diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2023-11-21 16:44:36 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-06 06:41:48 +0300 |
| commit | bb5e44fb3be685ecb3feb120aca4269a92cc84cf (patch) | |
| tree | dd0ec02549dcaccfacb521d6843f53b4f2890ff8 | |
| parent | 866ec3008691ff205b171413c52c5f1f328a2f8b (diff) | |
| download | linux-bb5e44fb3be685ecb3feb120aca4269a92cc84cf.tar.xz | |
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>
Signed-off-by: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/E1r5R3M-00CszH-6r@rmk-PC.armlinux.org.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 58bb86091b34..221ffbeb1c9b 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 |