18 files changed, 113 insertions, 155 deletions

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 105a0d61eb1f..dd547af4681a 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -47,16 +47,16 @@ static struct kset_uevent_ops memory_uevent_ops = {
         .uevent         = memory_uevent,
 };
 
-static struct notifier_block *memory_chain;
+static BLOCKING_NOTIFIER_HEAD(memory_chain);
 
 int register_memory_notifier(struct notifier_block *nb)
 {
-        return notifier_chain_register(&memory_chain, nb);
+        return blocking_notifier_chain_register(&memory_chain, nb);
 }
 
 void unregister_memory_notifier(struct notifier_block *nb)
 {
-        notifier_chain_unregister(&memory_chain, nb);
+        blocking_notifier_chain_unregister(&memory_chain, nb);
 }
 
 /*
@@ -140,7 +140,7 @@ static ssize_t show_mem_state(struct sys_device *dev, char *buf)
 
 static inline int memory_notify(unsigned long val, void *v)
 {
-        return notifier_call_chain(&memory_chain, val, v);
+        return blocking_notifier_call_chain(&memory_chain, val, v);
 }
 
 /*
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index b8fb87c6c29f..40eb005b9d77 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -3744,7 +3744,7 @@ static int ipmi_init_msghandler(void)
         ipmi_timer.expires = jiffies + IPMI_TIMEOUT_JIFFIES;
         add_timer(&ipmi_timer);
 
-        notifier_chain_register(&panic_notifier_list, &panic_block);
+        atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
 
         initialized = 1;
 
@@ -3764,7 +3764,7 @@ static __exit void cleanup_ipmi(void)
         if (!initialized)
                 return;
 
-        notifier_chain_unregister(&panic_notifier_list, &panic_block);
+        atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block);
 
         /* This can't be called if any interfaces exist, so no worry about
            shutting down the interfaces. */
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 12f858dc9994..35fbd4d8ed4b 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -237,10 +237,10 @@ struct smi_info
 
 static int try_smi_init(struct smi_info *smi);
 
-static struct notifier_block *xaction_notifier_list;
+static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list);
 static int register_xaction_notifier(struct notifier_block * nb)
 {
-        return notifier_chain_register(&xaction_notifier_list, nb);
+        return atomic_notifier_chain_register(&xaction_notifier_list, nb);
 }
 
 static void si_restart_short_timer(struct smi_info *smi_info);
@@ -302,7 +302,8 @@ static enum si_sm_result start_next_msg(struct smi_info *smi_info)
                 do_gettimeofday(&t);
                 printk("**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec);
 #endif
-                err = notifier_call_chain(&xaction_notifier_list, 0, smi_info);
+                err = atomic_notifier_call_chain(&xaction_notifier_list,
+                                0, smi_info);
                 if (err & NOTIFY_STOP_MASK) {
                         rv = SI_SM_CALL_WITHOUT_DELAY;
                         goto out;
diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c
index 616539310d9a..7ece9f3c8f70 100644
--- a/drivers/char/ipmi/ipmi_watchdog.c
+++ b/drivers/char/ipmi/ipmi_watchdog.c
@@ -1158,7 +1158,8 @@ static int __init ipmi_wdog_init(void)
         }
 
         register_reboot_notifier(&wdog_reboot_notifier);
-        notifier_chain_register(&panic_notifier_list, &wdog_panic_notifier);
+        atomic_notifier_chain_register(&panic_notifier_list,
+                        &wdog_panic_notifier);
 
         printk(KERN_INFO PFX "driver initialized\n");
 
@@ -1176,7 +1177,8 @@ static __exit void ipmi_unregister_watchdog(void)
                 release_nmi(&ipmi_nmi_handler);
 #endif
 
-        notifier_chain_unregister(&panic_notifier_list, &wdog_panic_notifier);
+        atomic_notifier_chain_unregister(&panic_notifier_list,
+                        &wdog_panic_notifier);
         unregister_reboot_notifier(&wdog_reboot_notifier);
 
         if (! watchdog_user)
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index aed80e6aec6d..9b6ae7dc8b8a 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -52,9 +52,8 @@ static void handle_update(void *data);
  * changes to devices when the CPU clock speed changes.
  * The mutex locks both lists.
  */
-static struct notifier_block *cpufreq_policy_notifier_list;
-static struct notifier_block *cpufreq_transition_notifier_list;
-static DECLARE_RWSEM (cpufreq_notifier_rwsem);
+static BLOCKING_NOTIFIER_HEAD(cpufreq_policy_notifier_list);
+static BLOCKING_NOTIFIER_HEAD(cpufreq_transition_notifier_list);
 
 
 static LIST_HEAD(cpufreq_governor_list);
@@ -247,8 +246,6 @@ void cpufreq_notify_transition(struct cpufreq_freqs *freqs, unsigned int state)
         dprintk("notification %u of frequency transition to %u kHz\n",
                 state, freqs->new);
 
-        down_read(&cpufreq_notifier_rwsem);
-
         policy = cpufreq_cpu_data[freqs->cpu];
         switch (state) {
 
@@ -266,20 +263,19 @@ void cpufreq_notify_transition(struct cpufreq_freqs *freqs, unsigned int state)
                                 freqs->old = policy->cur;
                         }
                 }
-                notifier_call_chain(&cpufreq_transition_notifier_list,
-                                        CPUFREQ_PRECHANGE, freqs);
+                blocking_notifier_call_chain(&cpufreq_transition_notifier_list,
+                                CPUFREQ_PRECHANGE, freqs);
                 adjust_jiffies(CPUFREQ_PRECHANGE, freqs);
                 break;
 
         case CPUFREQ_POSTCHANGE:
                 adjust_jiffies(CPUFREQ_POSTCHANGE, freqs);
-                notifier_call_chain(&cpufreq_transition_notifier_list,
-                                        CPUFREQ_POSTCHANGE, freqs);
+                blocking_notifier_call_chain(&cpufreq_transition_notifier_list,
+                                CPUFREQ_POSTCHANGE, freqs);
                 if (likely(policy) && likely(policy->cpu == freqs->cpu))
                         policy->cur = freqs->new;
                 break;
         }
-        up_read(&cpufreq_notifier_rwsem);
 }
 EXPORT_SYMBOL_GPL(cpufreq_notify_transition);
 
@@ -1007,7 +1003,7 @@ static int cpufreq_suspend(struct sys_device * sysdev, pm_message_t pmsg)
                 freqs.old = cpu_policy->cur;
                 freqs.new = cur_freq;
 
-                notifier_call_chain(&cpufreq_transition_notifier_list,
+                blocking_notifier_call_chain(&cpufreq_transition_notifier_list,
                                     CPUFREQ_SUSPENDCHANGE, &freqs);
                 adjust_jiffies(CPUFREQ_SUSPENDCHANGE, &freqs);
 
@@ -1088,7 +1084,8 @@ static int cpufreq_resume(struct sys_device * sysdev)
                         freqs.old = cpu_policy->cur;
                         freqs.new = cur_freq;
 
-                        notifier_call_chain(&cpufreq_transition_notifier_list,
+                        blocking_notifier_call_chain(
+                                        &cpufreq_transition_notifier_list,
                                         CPUFREQ_RESUMECHANGE, &freqs);
                         adjust_jiffies(CPUFREQ_RESUMECHANGE, &freqs);
 
@@ -1125,24 +1122,24 @@ static struct sysdev_driver cpufreq_sysdev_driver = {
  *      changes in cpufreq policy.
  *
  *      This function may sleep, and has the same return conditions as
- *      notifier_chain_register.
+ *      blocking_notifier_chain_register.
  */
 int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list)
 {
         int ret;
 
-        down_write(&cpufreq_notifier_rwsem);
         switch (list) {
         case CPUFREQ_TRANSITION_NOTIFIER:
-                ret = notifier_chain_register(&cpufreq_transition_notifier_list, nb);
+                ret = blocking_notifier_chain_register(
+                                &cpufreq_transition_notifier_list, nb);
                 break;
         case CPUFREQ_POLICY_NOTIFIER:
-                ret = notifier_chain_register(&cpufreq_policy_notifier_list, nb);
+                ret = blocking_notifier_chain_register(
+                                &cpufreq_policy_notifier_list, nb);
                 break;
         default:
                 ret = -EINVAL;
         }
-        up_write(&cpufreq_notifier_rwsem);
 
         return ret;
 }
@@ -1157,24 +1154,24 @@ EXPORT_SYMBOL(cpufreq_register_notifier);
  *      Remove a driver from the CPU frequency notifier list.
  *
  *      This function may sleep, and has the same return conditions as
- *      notifier_chain_unregister.
+ *      blocking_notifier_chain_unregister.
  */
 int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list)
 {
         int ret;
 
-        down_write(&cpufreq_notifier_rwsem);
         switch (list) {
         case CPUFREQ_TRANSITION_NOTIFIER:
-                ret = notifier_chain_unregister(&cpufreq_transition_notifier_list, nb);
+                ret = blocking_notifier_chain_unregister(
+                                &cpufreq_transition_notifier_list, nb);
                 break;
         case CPUFREQ_POLICY_NOTIFIER:
-                ret = notifier_chain_unregister(&cpufreq_policy_notifier_list, nb);
+                ret = blocking_notifier_chain_unregister(
+                                &cpufreq_policy_notifier_list, nb);
                 break;
         default:
                 ret = -EINVAL;
         }
-        up_write(&cpufreq_notifier_rwsem);
 
         return ret;
 }
@@ -1346,29 +1343,23 @@ static int __cpufreq_set_policy(struct cpufreq_policy *data, struct cpufreq_poli
         if (ret)
                 goto error_out;
 
-        down_read(&cpufreq_notifier_rwsem);
-
         /* adjust if necessary - all reasons */
-        notifier_call_chain(&cpufreq_policy_notifier_list, CPUFREQ_ADJUST,
-                            policy);
+        blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
+                        CPUFREQ_ADJUST, policy);
 
         /* adjust if necessary - hardware incompatibility*/
-        notifier_call_chain(&cpufreq_policy_notifier_list, CPUFREQ_INCOMPATIBLE,
-                            policy);
+        blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
+                        CPUFREQ_INCOMPATIBLE, policy);
 
         /* verify the cpu speed can be set within this limit,
            which might be different to the first one */
         ret = cpufreq_driver->verify(policy);
-        if (ret) {
-                up_read(&cpufreq_notifier_rwsem);
+        if (ret)
                 goto error_out;
-        }
 
         /* notification of the new policy */
-        notifier_call_chain(&cpufreq_policy_notifier_list, CPUFREQ_NOTIFY,
-                            policy);
-
-        up_read(&cpufreq_notifier_rwsem);
+        blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
+                        CPUFREQ_NOTIFY, policy);
 
         data->min = policy->min;
         data->max = policy->max;
diff --git a/drivers/firmware/dcdbas.c b/drivers/firmware/dcdbas.c
index d6543fc4a923..339f405ff708 100644
--- a/drivers/firmware/dcdbas.c
+++ b/drivers/firmware/dcdbas.c
@@ -484,26 +484,15 @@ static void dcdbas_host_control(void)
 static int dcdbas_reboot_notify(struct notifier_block *nb, unsigned long code,
                                 void *unused)
 {
-        static unsigned int notify_cnt = 0;
-
         switch (code) {
         case SYS_DOWN:
         case SYS_HALT:
         case SYS_POWER_OFF:
                 if (host_control_on_shutdown) {
                         /* firmware is going to perform host control action */
-                        if (++notify_cnt == 2) {
-                                printk(KERN_WARNING
-                                       "Please wait for shutdown "
-                                       "action to complete...\n");
-                                dcdbas_host_control();
-                        }
-                        /*
-                         * register again and initiate the host control
-                         * action on the second notification to allow
-                         * everyone that registered to be notified
-                         */
-                        register_reboot_notifier(nb);
+                        printk(KERN_WARNING "Please wait for shutdown "
+                               "action to complete...\n");
+                        dcdbas_host_control();
                 }
                 break;
         }
@@ -514,7 +503,7 @@ static int dcdbas_reboot_notify(struct notifier_block *nb, unsigned long code,
 static struct notifier_block dcdbas_reboot_nb = {
         .notifier_call = dcdbas_reboot_notify,
         .next = NULL,
-        .priority = 0
+        .priority = INT_MIN
 };
 
 static DCDBAS_BIN_ATTR_RW(smi_data);
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c
index d2ead1776c16..34fcabac5fdb 100644
--- a/drivers/macintosh/adb.c
+++ b/drivers/macintosh/adb.c
@@ -80,7 +80,7 @@ static struct adb_driver *adb_driver_list[] = {
 static struct class *adb_dev_class;
 
 struct adb_driver *adb_controller;
-struct notifier_block *adb_client_list = NULL;
+BLOCKING_NOTIFIER_HEAD(adb_client_list);
 static int adb_got_sleep;
 static int adb_inited;
 static pid_t adb_probe_task_pid;
@@ -354,7 +354,8 @@ adb_notify_sleep(struct pmu_sleep_notifier *self, int when)
                 /* Stop autopoll */
                 if (adb_controller->autopoll)
                         adb_controller->autopoll(0);
-                ret = notifier_call_chain(&adb_client_list, ADB_MSG_POWERDOWN, NULL);
+                ret = blocking_notifier_call_chain(&adb_client_list,
+                                ADB_MSG_POWERDOWN, NULL);
                 if (ret & NOTIFY_STOP_MASK) {
                         up(&adb_probe_mutex);
                         return PBOOK_SLEEP_REFUSE;
@@ -391,7 +392,8 @@ do_adb_reset_bus(void)
         if (adb_controller->autopoll)
                 adb_controller->autopoll(0);
 
-        nret = notifier_call_chain(&adb_client_list, ADB_MSG_PRE_RESET, NULL);
+        nret = blocking_notifier_call_chain(&adb_client_list,
+                        ADB_MSG_PRE_RESET, NULL);
         if (nret & NOTIFY_STOP_MASK) {
                 if (adb_controller->autopoll)
                         adb_controller->autopoll(autopoll_devs);
@@ -426,7 +428,8 @@ do_adb_reset_bus(void)
         }
         up(&adb_handler_sem);
 
-        nret = notifier_call_chain(&adb_client_list, ADB_MSG_POST_RESET, NULL);
+        nret = blocking_notifier_call_chain(&adb_client_list,
+                        ADB_MSG_POST_RESET, NULL);
         if (nret & NOTIFY_STOP_MASK)
                 return -EBUSY;
         
diff --git a/drivers/macintosh/adbhid.c b/drivers/macintosh/adbhid.c
index c0b46bceb5df..f5779a73184d 100644
--- a/drivers/macintosh/adbhid.c
+++ b/drivers/macintosh/adbhid.c
@@ -1214,7 +1214,8 @@ static int __init adbhid_init(void)
 
         adbhid_probe();
 
-        notifier_chain_register(&adb_client_list, &adbhid_adb_notifier);
+        blocking_notifier_chain_register(&adb_client_list,
+                        &adbhid_adb_notifier);
 
         return 0;
 }
diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index 4f5f3abc9cb3..0b5ff553e39a 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -187,7 +187,7 @@ extern int disable_kernel_backlight;
 
 int __fake_sleep;
 int asleep;
-struct notifier_block *sleep_notifier_list;
+BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
 
 #ifdef CONFIG_ADB
 static int adb_dev_map = 0;
diff --git a/drivers/macintosh/via-pmu68k.c b/drivers/macintosh/via-pmu68k.c
index f08e52f2107b..35b70323e7e3 100644
--- a/drivers/macintosh/via-pmu68k.c
+++ b/drivers/macintosh/via-pmu68k.c
@@ -102,7 +102,7 @@ static int pmu_kind = PMU_UNKNOWN;
 static int pmu_fully_inited = 0;
 
 int asleep;
-struct notifier_block *sleep_notifier_list;
+BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
 
 static int pmu_probe(void);
 static int pmu_init(void);
@@ -913,7 +913,8 @@ int powerbook_sleep(void)
         struct adb_request sleep_req;
 
         /* Notify device drivers */
-        ret = notifier_call_chain(&sleep_notifier_list, PBOOK_SLEEP, NULL);
+        ret = blocking_notifier_call_chain(&sleep_notifier_list,
+                        PBOOK_SLEEP, NULL);
         if (ret & NOTIFY_STOP_MASK)
                 return -EBUSY;
 
@@ -984,7 +985,7 @@ int powerbook_sleep(void)
                         enable_irq(i);
 
         /* Notify drivers */
-        notifier_call_chain(&sleep_notifier_list, PBOOK_WAKE, NULL);
+        blocking_notifier_call_chain(&sleep_notifier_list, PBOOK_WAKE, NULL);
 
         /* reenable ADB autopoll */
         pmu_adb_autopoll(adb_dev_map);
diff --git a/drivers/macintosh/windfarm_core.c b/drivers/macintosh/windfarm_core.c
index 6c0ba04bc57a..ab3faa702d58 100644
--- a/drivers/macintosh/windfarm_core.c
+++ b/drivers/macintosh/windfarm_core.c
@@ -52,7 +52,7 @@
 static LIST_HEAD(wf_controls);
 static LIST_HEAD(wf_sensors);
 static DEFINE_MUTEX(wf_lock);
-static struct notifier_block *wf_client_list;
+static BLOCKING_NOTIFIER_HEAD(wf_client_list);
 static int wf_client_count;
 static unsigned int wf_overtemp;
 static unsigned int wf_overtemp_counter;
@@ -68,7 +68,7 @@ static struct platform_device wf_platform_device = {
 
 static inline void wf_notify(int event, void *param)
 {
-        notifier_call_chain(&wf_client_list, event, param);
+        blocking_notifier_call_chain(&wf_client_list, event, param);
 }
 
 int wf_critical_overtemp(void)
@@ -398,7 +398,7 @@ int wf_register_client(struct notifier_block *nb)
         struct wf_sensor *sr;
 
         mutex_lock(&wf_lock);
-        rc = notifier_chain_register(&wf_client_list, nb);
+        rc = blocking_notifier_chain_register(&wf_client_list, nb);
         if (rc != 0)
                 goto bail;
         wf_client_count++;
@@ -417,7 +417,7 @@ EXPORT_SYMBOL_GPL(wf_register_client);
 int wf_unregister_client(struct notifier_block *nb)
 {
         mutex_lock(&wf_lock);
-        notifier_chain_unregister(&wf_client_list, nb);
+        blocking_notifier_chain_unregister(&wf_client_list, nb);
         wf_client_count++;
         if (wf_client_count == 0)
                 wf_stop_thread();
diff --git a/drivers/misc/ibmasm/heartbeat.c b/drivers/misc/ibmasm/heartbeat.c
index f295401fac21..7fd7a43e38de 100644
--- a/drivers/misc/ibmasm/heartbeat.c
+++ b/drivers/misc/ibmasm/heartbeat.c
@@ -52,12 +52,13 @@ static struct notifier_block panic_notifier = { panic_happened, NULL, 1 };
 
 void ibmasm_register_panic_notifier(void)
 {
-        notifier_chain_register(&panic_notifier_list, &panic_notifier);
+        atomic_notifier_chain_register(&panic_notifier_list, &panic_notifier);
 }
 
 void ibmasm_unregister_panic_notifier(void)
 {
-        notifier_chain_unregister(&panic_notifier_list, &panic_notifier);
+        atomic_notifier_chain_unregister(&panic_notifier_list,
+                        &panic_notifier);
 }
 
 
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 2d0ac169a86c..f13a539dc169 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -3159,7 +3159,7 @@ static int bond_slave_netdev_event(unsigned long event, struct net_device *slave
  * bond_netdev_event: handle netdev notifier chain events.
  *
  * This function receives events for the netdev chain.  The caller (an
- * ioctl handler calling notifier_call_chain) holds the necessary
+ * ioctl handler calling blocking_notifier_call_chain) holds the necessary
  * locks for us to safely manipulate the slave devices (RTNL lock,
  * dev_probe_lock).
  */
diff --git a/drivers/parisc/led.c b/drivers/parisc/led.c
index 3627a2d7f79f..298f2ddb2c17 100644
--- a/drivers/parisc/led.c
+++ b/drivers/parisc/led.c
@@ -499,11 +499,16 @@ static int led_halt(struct notifier_block *, unsigned long, void *);
 static struct notifier_block led_notifier = {
         .notifier_call = led_halt,
 };
+static int notifier_disabled = 0;
 
 static int led_halt(struct notifier_block *nb, unsigned long event, void *buf) 
 {
         char *txt;
-        
+
+        if (notifier_disabled)
+                return NOTIFY_OK;
+
+        notifier_disabled = 1;
         switch (event) {
         case SYS_RESTART:       txt = "SYSTEM RESTART";
                                 break;
@@ -527,7 +532,6 @@ static int led_halt(struct notifier_block *nb, unsigned long event, void *buf)
                 if (led_func_ptr)
                         led_func_ptr(0xff); /* turn all LEDs ON */
         
-        unregister_reboot_notifier(&led_notifier);
         return NOTIFY_OK;
 }
 
@@ -758,6 +762,12 @@ not_found:
         return 1;
 }
 
+static void __exit led_exit(void)
+{
+        unregister_reboot_notifier(&led_notifier);
+        return;
+}
+
 #ifdef CONFIG_PROC_FS
 module_init(led_create_procfs)
 #endif
diff --git a/drivers/parisc/power.c b/drivers/parisc/power.c
index 54b2b7f20b96..0bcab83b4080 100644
--- a/drivers/parisc/power.c
+++ b/drivers/parisc/power.c
@@ -251,7 +251,8 @@ static int __init power_init(void)
         }
 
         /* Register a call for panic conditions. */
-        notifier_chain_register(&panic_notifier_list, &parisc_panic_block);
+        atomic_notifier_chain_register(&panic_notifier_list,
+                        &parisc_panic_block);
 
         tasklet_enable(&power_tasklet);
 
@@ -264,7 +265,8 @@ static void __exit power_exit(void)
                 return;
 
         tasklet_disable(&power_tasklet);
-        notifier_chain_unregister(&panic_notifier_list, &parisc_panic_block);
+        atomic_notifier_chain_unregister(&panic_notifier_list,
+                        &parisc_panic_block);
         power_tasklet.func = NULL;
         pdc_soft_power_button(0);
 }
diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c
index 62e3cda859af..7f7013e80a88 100644
--- a/drivers/scsi/gdth.c
+++ b/drivers/scsi/gdth.c
@@ -671,7 +671,7 @@ static struct file_operations gdth_fops = {
 static struct notifier_block gdth_notifier = {
     gdth_halt, NULL, 0
 };
-
+static int notifier_disabled = 0;
 
 static void gdth_delay(int milliseconds)
 {
@@ -4595,13 +4595,13 @@ static int __init gdth_detect(struct scsi_host_template *shtp)
         add_timer(&gdth_timer);
 #endif
         major = register_chrdev(0,"gdth",&gdth_fops);
+        notifier_disabled = 0;
         register_reboot_notifier(&gdth_notifier);
     }
     gdth_polling = FALSE;
     return gdth_ctr_vcount;
 }
 
-
 static int gdth_release(struct Scsi_Host *shp)
 {
     int hanum;
@@ -5632,10 +5632,14 @@ static int gdth_halt(struct notifier_block *nb, ulong event, void *buf)
     char            cmnd[MAX_COMMAND_SIZE];   
 #endif
 
+    if (notifier_disabled)
+        return NOTIFY_OK;
+
     TRACE2(("gdth_halt() event %d\n",(int)event));
     if (event != SYS_RESTART && event != SYS_HALT && event != SYS_POWER_OFF)
         return NOTIFY_DONE;
 
+    notifier_disabled = 1;
     printk("GDT-HA: Flushing all host drives .. ");
     for (hanum = 0; hanum < gdth_ctr_count; ++hanum) {
         gdth_flush(hanum);
@@ -5679,7 +5683,6 @@ static int gdth_halt(struct notifier_block *nb, ulong event, void *buf)
 #ifdef GDTH_STATISTICS
     del_timer(&gdth_timer);
 #endif
-    unregister_reboot_notifier(&gdth_notifier);
     return NOTIFY_OK;
 }
 
diff --git a/drivers/usb/core/notify.c b/drivers/usb/core/notify.c
index 4b55285de9a0..fe0ed54fa0ae 100644
--- a/drivers/usb/core/notify.c
+++ b/drivers/usb/core/notify.c
@@ -16,57 +16,7 @@
 #include <linux/mutex.h>
 #include "usb.h"
 
-
-static struct notifier_block *usb_notifier_list;
-static DEFINE_MUTEX(usb_notifier_lock);
-
-static void usb_notifier_chain_register(struct notifier_block **list,
-                                        struct notifier_block *n)
-{
-        mutex_lock(&usb_notifier_lock);
-        while (*list) {
-                if (n->priority > (*list)->priority)
-                        break;
-                list = &((*list)->next);
-        }
-        n->next = *list;
-        *list = n;
-        mutex_unlock(&usb_notifier_lock);
-}
-
-static void usb_notifier_chain_unregister(struct notifier_block **nl,
-                                   struct notifier_block *n)
-{
-        mutex_lock(&usb_notifier_lock);
-        while ((*nl)!=NULL) {
-                if ((*nl)==n) {
-                        *nl = n->next;
-                        goto exit;
-                }
-                nl=&((*nl)->next);
-        }
-exit:
-        mutex_unlock(&usb_notifier_lock);
-}
-
-static int usb_notifier_call_chain(struct notifier_block **n,
-                                   unsigned long val, void *v)
-{
-        int ret=NOTIFY_DONE;
-        struct notifier_block *nb = *n;
-
-        mutex_lock(&usb_notifier_lock);
-        while (nb) {
-                ret = nb->notifier_call(nb,val,v);
-                if (ret&NOTIFY_STOP_MASK) {
-                        goto exit;
-                }
-                nb = nb->next;
-        }
-exit:
-        mutex_unlock(&usb_notifier_lock);
-        return ret;
-}
+static BLOCKING_NOTIFIER_HEAD(usb_notifier_list);
 
 /**
  * usb_register_notify - register a notifier callback whenever a usb change happens
@@ -76,7 +26,7 @@ exit:
  */
 void usb_register_notify(struct notifier_block *nb)
 {
-        usb_notifier_chain_register(&usb_notifier_list, nb);
+        blocking_notifier_chain_register(&usb_notifier_list, nb);
 }
 EXPORT_SYMBOL_GPL(usb_register_notify);
 
@@ -89,27 +39,28 @@ EXPORT_SYMBOL_GPL(usb_register_notify);
  */
 void usb_unregister_notify(struct notifier_block *nb)
 {
-        usb_notifier_chain_unregister(&usb_notifier_list, nb);
+        blocking_notifier_chain_unregister(&usb_notifier_list, nb);
 }
 EXPORT_SYMBOL_GPL(usb_unregister_notify);
 
 
 void usb_notify_add_device(struct usb_device *udev)
 {
-        usb_notifier_call_chain(&usb_notifier_list, USB_DEVICE_ADD, udev);
+        blocking_notifier_call_chain(&usb_notifier_list, USB_DEVICE_ADD, udev);
 }
 
 void usb_notify_remove_device(struct usb_device *udev)
 {
-        usb_notifier_call_chain(&usb_notifier_list, USB_DEVICE_REMOVE, udev);
+        blocking_notifier_call_chain(&usb_notifier_list,
+                        USB_DEVICE_REMOVE, udev);
 }
 
 void usb_notify_add_bus(struct usb_bus *ubus)
 {
-        usb_notifier_call_chain(&usb_notifier_list, USB_BUS_ADD, ubus);
+        blocking_notifier_call_chain(&usb_notifier_list, USB_BUS_ADD, ubus);
 }
 
 void usb_notify_remove_bus(struct usb_bus *ubus)
 {
-        usb_notifier_call_chain(&usb_notifier_list, USB_BUS_REMOVE, ubus);
+        blocking_notifier_call_chain(&usb_notifier_list, USB_BUS_REMOVE, ubus);
 }
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 07d882b14396..b1a8dca76430 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -55,7 +55,7 @@
 
 #define FBPIXMAPSIZE    (1024 * 8)
 
-static struct notifier_block *fb_notifier_list;
+static BLOCKING_NOTIFIER_HEAD(fb_notifier_list);
 struct fb_info *registered_fb[FB_MAX];
 int num_registered_fb;
 
@@ -784,7 +784,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 
                     event.info = info;
                     event.data = &mode1;
-                    ret = notifier_call_chain(&fb_notifier_list,
+                    ret = blocking_notifier_call_chain(&fb_notifier_list,
                                               FB_EVENT_MODE_DELETE, &event);
                 }
 
@@ -830,8 +830,8 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 
                                 info->flags &= ~FBINFO_MISC_USEREVENT;
                                 event.info = info;
-                                notifier_call_chain(&fb_notifier_list, evnt,
-                                                    &event);
+                                blocking_notifier_call_chain(&fb_notifier_list,
+                                                evnt, &event);
                         }
                 }
         }
@@ -854,7 +854,8 @@ fb_blank(struct fb_info *info, int blank)
 
                 event.info = info;
                 event.data = &blank;
-                notifier_call_chain(&fb_notifier_list, FB_EVENT_BLANK, &event);
+                blocking_notifier_call_chain(&fb_notifier_list,
+                                FB_EVENT_BLANK, &event);
         }
 
         return ret;
@@ -925,7 +926,7 @@ fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                 con2fb.framebuffer = -1;
                 event.info = info;
                 event.data = &con2fb;
-                notifier_call_chain(&fb_notifier_list,
+                blocking_notifier_call_chain(&fb_notifier_list,
                                     FB_EVENT_GET_CONSOLE_MAP, &event);
                 return copy_to_user(argp, &con2fb,
                                     sizeof(con2fb)) ? -EFAULT : 0;
@@ -944,7 +945,7 @@ fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
                     return -EINVAL;
                 event.info = info;
                 event.data = &con2fb;
-                return notifier_call_chain(&fb_notifier_list,
+                return blocking_notifier_call_chain(&fb_notifier_list,
                                            FB_EVENT_SET_CONSOLE_MAP,
                                            &event);
         case FBIOBLANK:
@@ -1324,7 +1325,7 @@ register_framebuffer(struct fb_info *fb_info)
         devfs_mk_cdev(MKDEV(FB_MAJOR, i),
                         S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i);
         event.info = fb_info;
-        notifier_call_chain(&fb_notifier_list,
+        blocking_notifier_call_chain(&fb_notifier_list,
                             FB_EVENT_FB_REGISTERED, &event);
         return 0;
 }
@@ -1366,7 +1367,7 @@ unregister_framebuffer(struct fb_info *fb_info)
  */
 int fb_register_client(struct notifier_block *nb)
 {
-        return notifier_chain_register(&fb_notifier_list, nb);
+        return blocking_notifier_chain_register(&fb_notifier_list, nb);
 }
 
 /**
@@ -1375,7 +1376,7 @@ int fb_register_client(struct notifier_block *nb)
  */
 int fb_unregister_client(struct notifier_block *nb)
 {
-        return notifier_chain_unregister(&fb_notifier_list, nb);
+        return blocking_notifier_chain_unregister(&fb_notifier_list, nb);
 }
 
 /**
@@ -1393,11 +1394,13 @@ void fb_set_suspend(struct fb_info *info, int state)
 
         event.info = info;
         if (state) {
-                notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, &event);
+                blocking_notifier_call_chain(&fb_notifier_list,
+                                FB_EVENT_SUSPEND, &event);
                 info->state = FBINFO_STATE_SUSPENDED;
         } else {
                 info->state = FBINFO_STATE_RUNNING;
-                notifier_call_chain(&fb_notifier_list, FB_EVENT_RESUME, &event);
+                blocking_notifier_call_chain(&fb_notifier_list,
+                                FB_EVENT_RESUME, &event);
         }
 }
 
@@ -1469,7 +1472,7 @@ int fb_new_modelist(struct fb_info *info)
 
         if (!list_empty(&info->modelist)) {
                 event.info = info;
-                err = notifier_call_chain(&fb_notifier_list,
+                err = blocking_notifier_call_chain(&fb_notifier_list,
                                            FB_EVENT_NEW_MODELIST,
                                            &event);
         }
@@ -1495,7 +1498,7 @@ int fb_con_duit(struct fb_info *info, int event, void *data)
         evnt.info = info;
         evnt.data = data;
 
-        return notifier_call_chain(&fb_notifier_list, event, &evnt);
+        return blocking_notifier_call_chain(&fb_notifier_list, event, &evnt);
 }
 EXPORT_SYMBOL(fb_con_duit);