3 files changed, 6 insertions, 4 deletions

diff --git a/include/linux/srcu.h b/include/linux/srcu.h
index 8a45367b5f3a..aca0eee53930 100644
--- a/include/linux/srcu.h
+++ b/include/linux/srcu.h
@@ -43,7 +43,7 @@ struct srcu_struct {
 #define srcu_barrier()
 #endif /* #else #ifndef CONFIG_PREEMPT */
 
-void init_srcu_struct(struct srcu_struct *sp);
+int init_srcu_struct(struct srcu_struct *sp);
 void cleanup_srcu_struct(struct srcu_struct *sp);
 int srcu_read_lock(struct srcu_struct *sp) __acquires(sp);
 void srcu_read_unlock(struct srcu_struct *sp, int idx) __releases(sp);
diff --git a/kernel/srcu.c b/kernel/srcu.c
index 7e1979f624ba..3507cabe963b 100644
--- a/kernel/srcu.c
+++ b/kernel/srcu.c
@@ -42,11 +42,12 @@
  * to any other function.  Each srcu_struct represents a separate domain
  * of SRCU protection.
  */
-void init_srcu_struct(struct srcu_struct *sp)
+int init_srcu_struct(struct srcu_struct *sp)
 {
         sp->completed = 0;
-        sp->per_cpu_ref = alloc_percpu(struct srcu_struct_array);
         mutex_init(&sp->mutex);
+        sp->per_cpu_ref = alloc_percpu(struct srcu_struct_array);
+        return (sp->per_cpu_ref ? 0 : -ENOMEM);
 }
 
 /*
diff --git a/kernel/sys.c b/kernel/sys.c
index fd5c71006775..98489d82801b 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -517,7 +517,8 @@ EXPORT_SYMBOL_GPL(srcu_notifier_call_chain);
 void srcu_init_notifier_head(struct srcu_notifier_head *nh)
 {
         mutex_init(&nh->mutex);
-        init_srcu_struct(&nh->srcu);
+        if (init_srcu_struct(&nh->srcu) < 0)
+                BUG();
         nh->head = NULL;
 }