padata - Register hotcpu notifier after initialization

padata_cpu_callback() takes pinst->lock, to avoid taking
an uninitialized lock, register the notifier after it's
initialization.

Signed-off-by: Richard Weinberger <richard@nod.at>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 6 insertions, 6 deletions

diff --git a/kernel/padata.c b/kernel/padata.c
index 2f0037a86289..07af2c95dcfe 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -1074,18 +1074,18 @@ struct padata_instance *padata_alloc(struct workqueue_struct *wq,
 
         pinst->flags = 0;
 
-#ifdef CONFIG_HOTPLUG_CPU
-        pinst->cpu_notifier.notifier_call = padata_cpu_callback;
-        pinst->cpu_notifier.priority = 0;
-        register_hotcpu_notifier(&pinst->cpu_notifier);
-#endif
-
         put_online_cpus();
 
         BLOCKING_INIT_NOTIFIER_HEAD(&pinst->cpumask_change_notifier);
         kobject_init(&pinst->kobj, &padata_attr_type);
         mutex_init(&pinst->lock);
 
+#ifdef CONFIG_HOTPLUG_CPU
+        pinst->cpu_notifier.notifier_call = padata_cpu_callback;
+        pinst->cpu_notifier.priority = 0;
+        register_hotcpu_notifier(&pinst->cpu_notifier);
+#endif
+
         return pinst;
 
 err_free_masks: