Index: uspace/lib/c/arch/sparc64/include/ddi.h
===================================================================
--- uspace/lib/c/arch/sparc64/include/ddi.h	(revision b5c2f5646cd6ac5e55c6a21110f700bb5fb3bae1)
+++ uspace/lib/c/arch/sparc64/include/ddi.h	(revision a801688bbb63ce8e1f39927867b7500c306a8b52)
@@ -63,5 +63,5 @@
 }
 
-static inline uint8_t arch_pio_read_8(ioport8_t *port)
+static inline uint8_t arch_pio_read_8(const ioport8_t *port)
 {
 	uint8_t rv;
@@ -73,5 +73,5 @@
 }
 
-static inline uint16_t arch_pio_read_16(ioport16_t *port)
+static inline uint16_t arch_pio_read_16(const ioport16_t *port)
 {
 	uint16_t rv;
@@ -83,5 +83,5 @@
 }
 
-static inline uint32_t arch_pio_read_32(ioport32_t *port)
+static inline uint32_t arch_pio_read_32(const ioport32_t *port)
 {
 	uint32_t rv;