diff options
Diffstat (limited to 'drivers/base/cpu.c')
| -rw-r--r-- | drivers/base/cpu.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index c61ecb0c2ae2..fdaa24bb641a 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -26,7 +26,7 @@ static DEFINE_PER_CPU(struct device *, cpu_sys_devices); -static int cpu_subsys_match(struct device *dev, struct device_driver *drv) +static int cpu_subsys_match(struct device *dev, const struct device_driver *drv) { /* ACPI style match is the only one that may succeed. */ if (acpi_driver_match_device(dev, drv)) @@ -95,6 +95,7 @@ void unregister_cpu(struct cpu *cpu) { int logical_cpu = cpu->dev.id; + set_cpu_enabled(logical_cpu, false); unregister_cpu_under_node(logical_cpu, cpu_to_node(logical_cpu)); device_unregister(&cpu->dev); @@ -273,6 +274,13 @@ static ssize_t print_cpus_offline(struct device *dev, } static DEVICE_ATTR(offline, 0444, print_cpus_offline, NULL); +static ssize_t print_cpus_enabled(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "%*pbl\n", cpumask_pr_args(cpu_enabled_mask)); +} +static DEVICE_ATTR(enabled, 0444, print_cpus_enabled, NULL); + static ssize_t print_cpus_isolated(struct device *dev, struct device_attribute *attr, char *buf) { @@ -308,7 +316,7 @@ static ssize_t crash_hotplug_show(struct device *dev, { return sysfs_emit(buf, "%d\n", crash_check_hotplug_support()); } -static DEVICE_ATTR_ADMIN_RO(crash_hotplug); +static DEVICE_ATTR_RO(crash_hotplug); #endif static void cpu_device_release(struct device *dev) @@ -413,6 +421,7 @@ int register_cpu(struct cpu *cpu, int num) register_cpu_under_node(num, cpu_to_node(num)); dev_pm_qos_expose_latency_limit(&cpu->dev, PM_QOS_RESUME_LATENCY_NO_CONSTRAINT); + set_cpu_enabled(num, true); return 0; } @@ -494,6 +503,7 @@ static struct attribute *cpu_root_attrs[] = { &cpu_attrs[2].attr.attr, &dev_attr_kernel_max.attr, &dev_attr_offline.attr, + &dev_attr_enabled.attr, &dev_attr_isolated.attr, #ifdef CONFIG_NO_HZ_FULL &dev_attr_nohz_full.attr, @@ -558,7 +568,7 @@ static void __init cpu_dev_register_generic(void) for_each_present_cpu(i) { ret = arch_register_cpu(i); - if (ret) + if (ret && ret != -EPROBE_DEFER) pr_warn("register_cpu %d failed (%d)\n", i, ret); } } |