ARM: 6675/1: use phys_addr_t instead of unsigned long in conversion code

The unsigned long datatype is not sufficient for mapping physical addresses
>= 4GB.

This patch ensures that the address conversion code in asm/memory.h casts
to the correct type when handling physical addresses. The internal v2p
macros only deal with lowmem addresses, so these do not need to be modified.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 5 insertions, 4 deletions

diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index 2398b3fc0268..431077c5a867 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -15,6 +15,7 @@
 
 #include <linux/compiler.h>
 #include <linux/const.h>
+#include <linux/types.h>
 #include <mach/memory.h>
 #include <asm/sizes.h>
 
@@ -135,8 +136,8 @@
 /*
  * Convert a physical address to a Page Frame Number and back
  */
-#define __phys_to_pfn(paddr)    ((paddr) >> PAGE_SHIFT)
-#define __pfn_to_phys(pfn)      ((pfn) << PAGE_SHIFT)
+#define __phys_to_pfn(paddr)    ((unsigned long)((paddr) >> PAGE_SHIFT))
+#define __pfn_to_phys(pfn)      ((phys_addr_t)(pfn) << PAGE_SHIFT)
 
 /*
  * Convert a page to/from a physical address
@@ -234,12 +235,12 @@ static inline unsigned long __phys_to_virt(unsigned long x)
  * translation for translating DMA addresses.  Use the driver
  * DMA support - see dma-mapping.h.
  */
-static inline unsigned long virt_to_phys(const volatile void *x)
+static inline phys_addr_t virt_to_phys(const volatile void *x)
 {
         return __virt_to_phys((unsigned long)(x));
 }
 
-static inline void *phys_to_virt(unsigned long x)
+static inline void *phys_to_virt(phys_addr_t x)
 {
         return (void *)(__phys_to_virt((unsigned long)(x)));
 }