[PATCH] fix/simplify mutex debugging code

Let's switch mutex_debug_check_no_locks_freed() to take (addr, len) as
arguments instead, since all its callers were just calculating the 'to'
address for themselves anyway... (and sometimes doing so badly).

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

mm/page_alloc.c

@@ -417,7 +417,7 @@ static void __free_pages_ok(struct page *page, unsigned int order)
 	arch_free_page(page, order);
 	if (!PageHighMem(page))
 		mutex_debug_check_no_locks_freed(page_address(page),
-			page_address(page+(1<<order)));
+						 PAGE_SIZE<<order);
 
 #ifndef CONFIG_MMU
 	for (i = 1 ; i < (1 << order) ; ++i)