diff options
Diffstat (limited to 'drivers/base/arch_topology.c')
| -rw-r--r-- | drivers/base/arch_topology.c | 38 |
1 files changed, 26 insertions, 12 deletions
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c index 5aaa0865625d..018ac202de34 100644 --- a/drivers/base/arch_topology.c +++ b/drivers/base/arch_topology.c @@ -219,20 +219,34 @@ static DECLARE_WORK(update_topology_flags_work, update_topology_flags_workfn); static DEVICE_ATTR_RO(cpu_capacity); -static int register_cpu_capacity_sysctl(void) +static int cpu_capacity_sysctl_add(unsigned int cpu) { - int i; - struct device *cpu; + struct device *cpu_dev = get_cpu_device(cpu); - for_each_possible_cpu(i) { - cpu = get_cpu_device(i); - if (!cpu) { - pr_err("%s: too early to get CPU%d device!\n", - __func__, i); - continue; - } - device_create_file(cpu, &dev_attr_cpu_capacity); - } + if (!cpu_dev) + return -ENOENT; + + device_create_file(cpu_dev, &dev_attr_cpu_capacity); + + return 0; +} + +static int cpu_capacity_sysctl_remove(unsigned int cpu) +{ + struct device *cpu_dev = get_cpu_device(cpu); + + if (!cpu_dev) + return -ENOENT; + + device_remove_file(cpu_dev, &dev_attr_cpu_capacity); + + return 0; +} + +static int register_cpu_capacity_sysctl(void) +{ + cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "topology/cpu-capacity", + cpu_capacity_sysctl_add, cpu_capacity_sysctl_remove); return 0; } |