wait_for_random_bytes
ret = wait_for_random_bytes();
EXPORT_SYMBOL(wait_for_random_bytes);
ret = wait_for_random_bytes();
wait_for_random_bytes();
wait_for_random_bytes();
wait_for_random_bytes();
int wait_for_random_bytes(void);
int ret = wait_for_random_bytes();
err = wait_for_random_bytes();