dequeue_signal
ret = dequeue_signal(&ctx->sigmask, info, &type);
ret = dequeue_signal(&ctx->sigmask, info, &type);
extern int dequeue_signal(sigset_t *mask, kernel_siginfo_t *info, enum pid_type *type);
ret = dequeue_signal(&task->blocked, &__info, &__type);
signr = dequeue_signal(¤t->blocked, &ksig->info, &type);
sig = dequeue_signal(&mask, info, &type);
sig = dequeue_signal(&mask, info, &type);
EXPORT_SYMBOL_GPL(dequeue_signal);