--- xnu/xnu-10002.1.13/iokit/Kernel/IOSharedDataQueue.cpp
+++ xnu/xnu-8019.80.24/iokit/Kernel/IOSharedDataQueue.cpp
@@ -79,7 +79,6 @@
 {
 	IODataQueueAppendix *   appendix;
 	vm_size_t               allocSize;
-	kern_return_t           kr;
 
 	if (!super::init()) {
 		return false;
@@ -100,11 +99,11 @@
 		return false;
 	}
 
-	kr = kmem_alloc(kernel_map, (vm_offset_t *)&dataQueue, allocSize,
-	    (kma_flags_t)(KMA_DATA | KMA_ZERO), IOMemoryTag(kernel_map));
-	if (kr != KERN_SUCCESS) {
-		return false;
-	}
+	dataQueue = (IODataQueueMemory *)IOMallocAligned(allocSize, PAGE_SIZE);
+	if (dataQueue == NULL) {
+		return false;
+	}
+	bzero(dataQueue, allocSize);
 
 	dataQueue->queueSize    = size;
 //  dataQueue->head         = 0;
@@ -134,8 +133,7 @@
 IOSharedDataQueue::free()
 {
 	if (dataQueue) {
-		kmem_free(kernel_map, (vm_offset_t)dataQueue, round_page(getQueueSize() +
-		    DATA_QUEUE_MEMORY_HEADER_SIZE + DATA_QUEUE_MEMORY_APPENDIX_SIZE));
+		IOFreeAligned(dataQueue, round_page(getQueueSize() + DATA_QUEUE_MEMORY_HEADER_SIZE + DATA_QUEUE_MEMORY_APPENDIX_SIZE));
 		dataQueue = NULL;
 		if (notifyMsg) {
 			IOFreeType(notifyMsg, mach_msg_header_t);