Index: uspace/lib/usb/include/usb/dma_buffer.h
===================================================================
--- uspace/lib/usb/include/usb/dma_buffer.h	(revision 3b60ea0ab63232b82cbb39069c74d417545a98e6)
+++ uspace/lib/usb/include/usb/dma_buffer.h	(revision 73a5857016948b0a6daad123e7cef8b6e4a8ebe7)
@@ -55,8 +55,6 @@
 } dma_buffer_t;
 
-extern dma_policy_t dma_policy_default;
-
 extern int dma_buffer_alloc(dma_buffer_t *db, size_t size);
-extern int dma_buffer_alloc_policy(dma_buffer_t *, size_t, dma_policy_t);
+extern int dma_buffer_alloc_policy(dma_buffer_t *, size_t, const dma_policy_t *);
 extern void dma_buffer_free(dma_buffer_t *);
 extern uintptr_t dma_buffer_phys(const dma_buffer_t *, void *);