1 files changed, 2 insertions, 2 deletions

diff --git a/include/asm-mips/io.h b/include/asm-mips/io.h
index c2d124badbe5..bc5f3c53155f 100644
--- a/include/asm-mips/io.h
+++ b/include/asm-mips/io.h
@@ -172,7 +172,7 @@ extern unsigned long isa_slot_offset;
 #define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
 
 extern void __iomem * __ioremap(phys_t offset, phys_t size, unsigned long flags);
-extern void __iounmap(volatile void __iomem *addr);
+extern void __iounmap(const volatile void __iomem *addr);
 
 static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size,
         unsigned long flags)
@@ -279,7 +279,7 @@ static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size,
 #define ioremap_uncached_accelerated(offset, size)                      \
         __ioremap_mode((offset), (size), _CACHE_UNCACHED_ACCELERATED)
 
-static inline void iounmap(volatile void __iomem *addr)
+static inline void iounmap(const volatile void __iomem *addr)
 {
 #define __IS_KSEG1(addr) (((unsigned long)(addr) & ~0x1fffffffUL) == CKSEG1)