- err = kstrtoull_from_user(ubuf, cnt, 10, &val);
- if (err)
- return err;
+ get_online_cpus();
+ /*
+ * Run only on CPUs in which hwlat is allowed to run.
+ */
+ cpumask_and(current_mask, cpu_online_mask, tr->tracing_cpumask);
+
+ for_each_online_cpu(cpu)
+ per_cpu(hwlat_per_cpu_data, cpu).kthread = NULL;
+
+ for_each_cpu(cpu, current_mask) {
+ retval = start_cpu_kthread(cpu);
+ if (retval)
+ goto out_error;
+ }
+ put_online_cpus();
+
+ return 0;
+
+out_error:
+ put_online_cpus();
+ stop_per_cpu_kthreads();
+ return retval;
+}
+
+static void *s_mode_start(struct seq_file *s, loff_t *pos)
+{
+ int mode = *pos;