Continue merging libdispatch-1121 onto master.

Author: ktopley-apple

src/init.c

@@ -443,7 +443,7 @@ _dispatch_queue_attr_to_info(dispatch_queue_attr_t dqa)
 	dqai.dqai_concurrent = !(idx % DISPATCH_QUEUE_ATTR_CONCURRENCY_COUNT);
 	idx /= DISPATCH_QUEUE_ATTR_CONCURRENCY_COUNT;
 
-	dqai.dqai_relpri = -(idx % DISPATCH_QUEUE_ATTR_PRIO_COUNT);
+	dqai.dqai_relpri = -(int)(idx % DISPATCH_QUEUE_ATTR_PRIO_COUNT);
 	idx /= DISPATCH_QUEUE_ATTR_PRIO_COUNT;
 
 	dqai.dqai_qos = idx % DISPATCH_QUEUE_ATTR_QOS_COUNT;

src/semaphore.c

@@ -158,7 +158,7 @@ _dispatch_group_create_with_count(uint32_t n)
 	dg->do_targetq = _dispatch_get_default_queue(false);
 	if (n) {
 		os_atomic_store2o(dg, dg_bits,
-				-n * DISPATCH_GROUP_VALUE_INTERVAL, relaxed);
+				(uint32_t)(-n * DISPATCH_GROUP_VALUE_INTERVAL), relaxed);
 		os_atomic_store2o(dg, do_ref_cnt, 1, relaxed); // <rdar://22318411>
 	}
 	return dg;