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>

1 files changed, 5 insertions, 4 deletions

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