in binder.c [4030:4060]
static int binder_wait_for_work(struct binder_thread *thread,
bool do_proc_work)
{
DEFINE_WAIT(wait);
struct binder_proc *proc = thread->proc;
int ret = 0;
freezer_do_not_count();
binder_inner_proc_lock(proc);
for (;;) {
prepare_to_wait(&thread->wait, &wait, TASK_INTERRUPTIBLE);
if (binder_has_work_ilocked(thread, do_proc_work))
break;
if (do_proc_work)
list_add(&thread->waiting_thread_node,
&proc->waiting_threads);
binder_inner_proc_unlock(proc);
schedule();
binder_inner_proc_lock(proc);
list_del_init(&thread->waiting_thread_node);
if (signal_pending(current)) {
ret = -EINTR;
break;
}
}
finish_wait(&thread->wait, &wait);
binder_inner_proc_unlock(proc);
freezer_count();
return ret;
}