[PATCH] alpha: move_initrd fix (from Jeff Wiedemeier)

While testing our upcoming kernel update for 7.2 alpha, I've encountered
a problem with move_initrd. It allocates a page-aligned chunk to move
the initrd into, but it doesn't allocate the entire last
page. Subsequent bootmem allocations can then be filled from the last
page used be the initrd.  This then becomes a problem when the initrd
memory is released.

arch/alpha/kernel/setup.c

@@ -268,7 +268,7 @@ move_initrd(unsigned long mem_limit)
 	unsigned long size;
 
 	size = initrd_end - initrd_start;
-	start = __alloc_bootmem(size, PAGE_SIZE, 0);
+	start = __alloc_bootmem(PAGE_ALIGN(size), PAGE_SIZE, 0);
 	if (!start || __pa(start) + size > mem_limit) {
 		initrd_start = initrd_end = 0;
 		return NULL;