x86: do not printout if we do not find setup_data

Signed-off-by: NYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/setup.c

@@ -399,6 +399,7 @@ static void __init reserve_setup_data(void)
 	struct setup_data *data;
 	u64 pa_data;
 	char buf[32];
+	int found = 0;
 
 	if (boot_params.hdr.version < 0x0209)
 		return;
@@ -409,9 +410,13 @@ static void __init reserve_setup_data(void)
 		reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
 		e820_update_range(pa_data, sizeof(*data)+data->len,
 			 E820_RAM, E820_RESERVED_KERN);
+		found = 1;
 		pa_data = data->next;
 		early_iounmap(data, sizeof(*data));
 	}
+	if (!found)
+		return;
+
 	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
 	printk(KERN_INFO "extended physical RAM map:\n");
 	e820_print_map("reserve setup_data");