m68k: Allow ioremapping top of memory

The test in __ioremap to reject memory ranges crossing the 0 boundary
rejects also memory ranges ending at the end of the memory.  Fix that.

Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c
index df620ac2a296..cf93cdd515c5 100644
--- a/arch/m68k/mm/kmap.c
+++ b/arch/m68k/mm/kmap.c
@@ -116,7 +116,7 @@ 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