logic_io instance of iounmap() needs volatile on argument

... same as the rest of implementations
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>

include/asm-generic/logic_io.h

@@ -34,7 +34,7 @@
 void __iomem *ioremap(phys_addr_t offset, size_t size);
 
 #define iounmap iounmap
-void iounmap(void __iomem *addr);
+void iounmap(void volatile __iomem *addr);
 
 #define __raw_readb __raw_readb
 u8 __raw_readb(const volatile void __iomem *addr);

lib/logic_iomem.c

@@ -76,7 +76,7 @@ static void __iomem *real_ioremap(phys_addr_t offset, size_t size)
 	return NULL;
 }
 
-static void real_iounmap(void __iomem *addr)
+static void real_iounmap(volatile void __iomem *addr)
 {
 	WARN(1, "invalid iounmap for addr 0x%llx\n",
 	     (unsigned long long)(uintptr_t __force)addr);
@@ -149,7 +149,7 @@ get_area(const volatile void __iomem *addr)
 	return NULL;
 }
 
-void iounmap(void __iomem *addr)
+void iounmap(volatile void __iomem *addr)
 {
 	struct logic_iomem_area *area = get_area(addr);