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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>
This commit is contained in:
Philippe De Muyter 2009-12-06 20:28:41 +01:00 committed by Geert Uytterhoeven
parent 145452649d
commit 88cb773c5f
1 changed files with 1 additions and 1 deletions
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arch/m68k/mm/kmap.c
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@ -116,7 +116,7 @@ void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cachefla
/* /*
* Don't allow mappings that wrap.. * Don't allow mappings that wrap..
*/ */
if (!size || size > physaddr + size) if (!size || physaddr > (unsigned long)(-size))
return NULL; return NULL;
#ifdef CONFIG_AMIGA #ifdef CONFIG_AMIGA