1 files changed, 2 insertions, 3 deletions

diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c
index df620ac2a296..69345849454b 100644
--- a/arch/m68k/mm/kmap.c
+++ b/arch/m68k/mm/kmap.c
@@ -99,8 +99,7 @@ static inline void free_io_area(void *addr)
 #endif
 
 /*
- * Map some physical address range into the kernel address space. The
- * code is copied and adapted from map_chunk().
+ * Map some physical address range into the kernel address space.
  */
 /* Rewritten by Andreas Schwab to remove all races. */
 
@@ -116,7 +115,7 @@ void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cachefla
         /*
          * Don't allow mappings that wrap..
          */
-        if (!size || size > physaddr + size)
+        if (!size || physaddr > (unsigned long)(-size))
                 return NULL;
 
 #ifdef CONFIG_AMIGA