1 files changed, 1 insertions, 1 deletions

diff --git a/include/asm-parisc/io.h b/include/asm-parisc/io.h
index b9eb245b8874..c1963ce19dd2 100644
--- a/include/asm-parisc/io.h
+++ b/include/asm-parisc/io.h
@@ -134,7 +134,7 @@ extern inline void __iomem * ioremap(unsigned long offset, unsigned long size)
 }
 #define ioremap_nocache(off, sz)        ioremap((off), (sz))
 
-extern void iounmap(void __iomem *addr);
+extern void iounmap(const volatile void __iomem *addr);
 
 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
 {