4 files changed, 29 insertions, 22 deletions

diff --git a/init/Kconfig b/init/Kconfig
index f068071fcc5d..6a5c5fed66c9 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -675,6 +675,9 @@ config CC_OPTIMIZE_FOR_SIZE
 config SYSCTL
         bool
 
+config ANON_INODES
+        bool
+
 menuconfig EMBEDDED
         bool "Configure standard kernel features (for small systems)"
         help
@@ -780,18 +783,6 @@ config PCSPKR_PLATFORM
           This option allows to disable the internal PC-Speaker
           support, saving some memory.
 
-config COMPAT_BRK
-        bool "Disable heap randomization"
-        default y
-        help
-          Randomizing heap placement makes heap exploits harder, but it
-          also breaks ancient binaries (including anything libc5 based).
-          This option changes the bootup default to heap randomization
-          disabled, and can be overriden runtime by setting
-          /proc/sys/kernel/randomize_va_space to 2.
-
-          On non-ancient distros (post-2000 ones) N is usually a safe choice.
-
 config BASE_FULL
         default y
         bool "Enable full-sized data structures for core" if EMBEDDED
@@ -809,9 +800,6 @@ config FUTEX
           support for "fast userspace mutexes".  The resulting kernel may not
           run glibc-based applications correctly.
 
-config ANON_INODES
-        bool
-
 config EPOLL
         bool "Enable eventpoll support" if EMBEDDED
         default y
@@ -897,6 +885,18 @@ config SLUB_DEBUG
           SLUB sysfs support. /sys/slab will not exist and there will be
           no support for cache validation etc.
 
+config COMPAT_BRK
+        bool "Disable heap randomization"
+        default y
+        help
+          Randomizing heap placement makes heap exploits harder, but it
+          also breaks ancient binaries (including anything libc5 based).
+          This option changes the bootup default to heap randomization
+          disabled, and can be overriden runtime by setting
+          /proc/sys/kernel/randomize_va_space to 2.
+
+          On non-ancient distros (post-2000 ones) N is usually a safe choice.
+
 choice
         prompt "Choose SLAB allocator"
         default SLUB
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();