kernel/: convert cpu notifier to return encapsulate errno value

By the previous modification, the cpu notifier can return encapsulate
errno value.  This converts the cpu notifiers for kernel/*.c

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

7 files changed, 17 insertions, 13 deletions

diff --git a/kernel/padata.c b/kernel/padata.c
index b1c9857f8402..fdd8ae609ce3 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -659,7 +659,7 @@ static int padata_cpu_callback(struct notifier_block *nfb,
                 err = __padata_add_cpu(pinst, cpu);
                 mutex_unlock(&pinst->lock);
                 if (err)
-                        return NOTIFY_BAD;
+                        return notifier_from_errno(err);
                 break;
 
         case CPU_DOWN_PREPARE:
@@ -670,7 +670,7 @@ static int padata_cpu_callback(struct notifier_block *nfb,
                 err = __padata_remove_cpu(pinst, cpu);
                 mutex_unlock(&pinst->lock);
                 if (err)
-                        return NOTIFY_BAD;
+                        return notifier_from_errno(err);
                 break;
 
         case CPU_UP_CANCELED:
diff --git a/kernel/profile.c b/kernel/profile.c
index dfadc5b729f1..1e6a0d94ea63 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -372,7 +372,7 @@ static int __cpuinit profile_cpu_callback(struct notifier_block *info,
                                         GFP_KERNEL | __GFP_ZERO,
                                         0);
                         if (!page)
-                                return NOTIFY_BAD;
+                                return notifier_from_errno(-ENOMEM);
                         per_cpu(cpu_profile_hits, cpu)[1] = page_address(page);
                 }
                 if (!per_cpu(cpu_profile_hits, cpu)[0]) {
@@ -388,7 +388,7 @@ out_free:
                 page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[1]);
                 per_cpu(cpu_profile_hits, cpu)[1] = NULL;
                 __free_page(page);
-                return NOTIFY_BAD;
+                return notifier_from_errno(-ENOMEM);
         case CPU_ONLINE:
         case CPU_ONLINE_FROZEN:
                 if (prof_cpu_mask != NULL)
diff --git a/kernel/relay.c b/kernel/relay.c
index 4268287148c1..c7cf397fb929 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -539,7 +539,7 @@ static int __cpuinit relay_hotcpu_callback(struct notifier_block *nb,
                                         "relay_hotcpu_callback: cpu %d buffer "
                                         "creation failed\n", hotcpu);
                                 mutex_unlock(&relay_channels_mutex);
-                                return NOTIFY_BAD;
+                                return notifier_from_errno(-ENOMEM);
                         }
                 }
                 mutex_unlock(&relay_channels_mutex);
diff --git a/kernel/smp.c b/kernel/smp.c
index 3fc697336183..75c970c715d3 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -52,7 +52,7 @@ hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu)
         case CPU_UP_PREPARE_FROZEN:
                 if (!zalloc_cpumask_var_node(&cfd->cpumask, GFP_KERNEL,
                                 cpu_to_node(cpu)))
-                        return NOTIFY_BAD;
+                        return notifier_from_errno(-ENOMEM);
                 break;
 
 #ifdef CONFIG_HOTPLUG_CPU
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 0db913a5c60f..825e1126008f 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -808,7 +808,7 @@ static int __cpuinit cpu_callback(struct notifier_block *nfb,
                 p = kthread_create(run_ksoftirqd, hcpu, "ksoftirqd/%d", hotcpu);
                 if (IS_ERR(p)) {
                         printk("ksoftirqd for %i failed\n", hotcpu);
-                        return NOTIFY_BAD;
+                        return notifier_from_errno(PTR_ERR(p));
                 }
                 kthread_bind(p, hotcpu);
                 per_cpu(ksoftirqd, hotcpu) = p;
diff --git a/kernel/timer.c b/kernel/timer.c
index be394af5bc22..e3b8c697bde4 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1680,11 +1680,14 @@ static int __cpuinit timer_cpu_notify(struct notifier_block *self,
                                 unsigned long action, void *hcpu)
 {
         long cpu = (long)hcpu;
+        int err;
+
         switch(action) {
         case CPU_UP_PREPARE:
         case CPU_UP_PREPARE_FROZEN:
-                if (init_timers_cpu(cpu) < 0)
-                        return NOTIFY_BAD;
+                err = init_timers_cpu(cpu);
+                if (err < 0)
+                        return notifier_from_errno(err);
                 break;
 #ifdef CONFIG_HOTPLUG_CPU
         case CPU_DEAD:
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 77dabbf64b8f..327d2deb4451 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1110,7 +1110,7 @@ static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
         unsigned int cpu = (unsigned long)hcpu;
         struct cpu_workqueue_struct *cwq;
         struct workqueue_struct *wq;
-        int ret = NOTIFY_OK;
+        int err = 0;
 
         action &= ~CPU_TASKS_FROZEN;
 
@@ -1124,12 +1124,13 @@ undo:
 
                 switch (action) {
                 case CPU_UP_PREPARE:
-                        if (!create_workqueue_thread(cwq, cpu))
+                        err = create_workqueue_thread(cwq, cpu);
+                        if (!err)
                                 break;
                         printk(KERN_ERR "workqueue [%s] for %i failed\n",
                                 wq->name, cpu);
                         action = CPU_UP_CANCELED;
-                        ret = NOTIFY_BAD;
+                        err = -ENOMEM;
                         goto undo;
 
                 case CPU_ONLINE:
@@ -1150,7 +1151,7 @@ undo:
                 cpumask_clear_cpu(cpu, cpu_populated_map);
         }
 
-        return ret;
+        return notifier_from_errno(err);
 }
 
 #ifdef CONFIG_SMP