[PATCH] call virt_to_page() with void*, not UL

I'm sure there's a good reason for these functions to take virtual addresses
as unsigned longs, so suppress the warnings and cast them to the proper types
before calling the virt/phys conversion functions

A perfectly acceptable alternative would be to go and change free_pages() to
stop taking unsigned longs for virtual addresses, but this has a much smaller
impact.
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

mm/page_alloc.c

@@ -798,8 +798,8 @@ EXPORT_SYMBOL(__free_pages);
 fastcall void free_pages(unsigned long addr, unsigned int order)
 {
 	if (addr != 0) {
-		BUG_ON(!virt_addr_valid(addr));
-		__free_pages(virt_to_page(addr), order);
+		BUG_ON(!virt_addr_valid((void *)addr));
+		__free_pages(virt_to_page((void *)addr), order);
 	}
 }