use dynamic spinlock initialisation in

static int __init rand_initialize(void)
{

(quoted diff) +3 -0

+	spin_lock_init(&input_pool.lock);
+	spin_lock_init(&blocking_pool.lock);
+	spin_lock_init(&nonblocking_pool.lock);
 	init_std_data(&input_pool);
 	init_std_data(&blocking_pool);
 	init_std_data(&nonblocking_pool);