x86: fix an incompatible pointer type warning on 64-bit compilations

Fix an incompatible pointer type warning on x86_64 compilations.
early_memtest() is passing a u64* to find_e820_area_size() which is expecting
an unsigned long.  Change t_start and t_size to unsigned long as those are
also 64-bit types on x88_64.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/mm/init_64.c

@@ -506,7 +506,7 @@ early_param("memtest", parse_memtest);
 
 static void __init early_memtest(unsigned long start, unsigned long end)
 {
-	u64 t_start, t_size;
+	unsigned long t_start, t_size;
 	unsigned pattern;
 
 	if (!memtest_pattern)
@@ -525,7 +525,7 @@ static void __init early_memtest(unsigned long start, unsigned long end)
 			if (t_start + t_size > end)
 				t_size = end - t_start;
 
-			printk(KERN_CONT "\n  %016llx - %016llx pattern %d",
+			printk(KERN_CONT "\n  %016lx - %016lx pattern %d",
 				t_start, t_start + t_size, pattern);
 
 			memtest(t_start, t_size, pattern);