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-rw-r--r--include/asm-arm/io.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h
index 8076a85c3675..34aaaac4f617 100644
--- a/include/asm-arm/io.h
+++ b/include/asm-arm/io.h
@@ -63,7 +63,7 @@ extern void __raw_readsl(const void __iomem *addr, void *data, int longlen);
*/
extern void __iomem * __ioremap_pfn(unsigned long, unsigned long, size_t, unsigned long);
extern void __iomem * __ioremap(unsigned long, size_t, unsigned long);
-extern void __iounmap(void __iomem *addr);
+extern void __iounmap(volatile void __iomem *addr);
/*
* Bad read/write accesses...