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path: root/drivers/base/cpu.c
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Diffstat (limited to 'drivers/base/cpu.c')
-rw-r--r--drivers/base/cpu.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index c61ecb0c2ae2..b57326fd48d4 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -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)
{
@@ -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);
}
}