Merge commit 'origin/master' into next

3 files changed, 14 insertions, 7 deletions

diff --git a/init/do_mounts.c b/init/do_mounts.c
index 708105e163df..8d4ff5afc1d8 100644
--- a/init/do_mounts.c
+++ b/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;
diff --git a/init/do_mounts_md.c b/init/do_mounts_md.c
index ff95e3192884..9bdddbcb3d6a 100644
--- a/init/do_mounts_md.c
+++ b/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);
diff --git a/init/main.c b/init/main.c
index 844209453c02..83697e160b3a 100644
--- a/init/main.c
+++ b/init/main.c
@@ -97,7 +97,7 @@ static inline void mark_rodata_ro(void) { }
 extern void tc_init(void);
 #endif
 
-enum system_states system_state;
+enum system_states system_state __read_mostly;
 EXPORT_SYMBOL(system_state);
 
 /*
@@ -463,6 +463,7 @@ static noinline void __init_refok rest_init(void)
          * at least once to get things moving:
          */
         init_idle_bootup_task(current);
+        rcu_scheduler_starting();
         preempt_enable_no_resched();
         schedule();
         preempt_disable();