ras_process_thread
ras_proc->ras_process_thread = kthread_run(ras_process_thread,
if (!ras_proc->ras_process_thread) {
if (ras_proc->ras_process_thread) {
kthread_stop(ras_proc->ras_process_thread);
ras_proc->ras_process_thread = NULL;
void *ras_process_thread;