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-rw-r--r--arch/m68k/mm/kmap.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c
index df620ac..6934584 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
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