[ARM] Fix buggy __phys_to_pfn / __pfn_to_phys

Macro arguments should _always_ be surrounded by parentheses
when used to prevent unexpected problems with operator precedence.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/include/asm-arm/mach/map.h b/include/asm-arm/mach/map.h
index 0619522..b338936 100644 (file)
--- a/include/asm-arm/mach/map.h
+++ b/include/asm-arm/mach/map.h
@@ -27,8 +27,8 @@ struct meminfo;
 #define MT_ROM                 6
 #define MT_IXP2000_DEVICE      7
 
-#define        __phys_to_pfn(paddr)    (paddr >> PAGE_SHIFT)
-#define        __pfn_to_phys(pfn)      (pfn << PAGE_SHIFT)
+#define        __phys_to_pfn(paddr)    ((paddr) >> PAGE_SHIFT)
+#define        __pfn_to_phys(pfn)      ((pfn) << PAGE_SHIFT)
 
 extern void create_memmap_holes(struct meminfo *);
 extern void memtable_init(struct meminfo *);