[PATCH] fix ioremap off by one bug

Patch from Andreas Klein <asklein@cip.physik.uni-wuerzburg.de>

Fixes an off-by-one in ioremap() - local variable `last_addr' is *inclusive*
- it is the last byte of the mapping, not the usual (last byte + 1).

arch/i386/mm/ioremap.c

@@ -148,7 +148,7 @@ void * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flag
 	 */
 	offset = phys_addr & ~PAGE_MASK;
 	phys_addr &= PAGE_MASK;
-	size = PAGE_ALIGN(last_addr) - phys_addr;
+	size = PAGE_ALIGN(last_addr+1) - phys_addr;
 
 	/*
 	 * Ok, go for it..