Merge branches 'sched/cleanups', 'sched/urgent' and 'linus' into sched/core

init/do_mounts.c

@@ -370,10 +370,14 @@ void __init prepare_namespace(void)
 		ssleep(root_delay);
 	}
 
-	/* wait for the known devices to complete their probing */
-	while (driver_probe_done() != 0)
-		msleep(100);
-	async_synchronize_full();
+	/*
+	 * wait for the known devices to complete their probing
+	 *
+	 * Note: this is a potential source of long boot delays.
+	 * For example, it is not atypical to wait 5 seconds here
+	 * for the touchpad of a laptop to initialize.
+	 */
+	wait_for_device_probe();
 
 	md_run_setup();
 
@@ -399,6 +403,7 @@ void __init prepare_namespace(void)
 		while (driver_probe_done() != 0 ||
 			(ROOT_DEV = name_to_dev_t(saved_root_name)) == 0)
 			msleep(100);
+		async_synchronize_full();
 	}
 
 	is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR;

init/do_mounts_md.c

@@ -281,8 +281,9 @@ static void __init autodetect_raid(void)
 	 */
 	printk(KERN_INFO "md: Waiting for all devices to be available before autodetect\n");
 	printk(KERN_INFO "md: If you don't use raid, use raid=noautodetect\n");
-	while (driver_probe_done() < 0)
-		msleep(100);
+
+	wait_for_device_probe();
+
 	fd = sys_open("/dev/md0", 0, 0);
 	if (fd >= 0) {
 		sys_ioctl(fd, RAID_AUTORUN, raid_autopart);