1 files changed, 6 insertions, 0 deletions

diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 92cdd9936e3d..bc1e61b49046 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -157,12 +157,14 @@ radix_tree_node_alloc(struct radix_tree_root *root)
                  * succeed in getting a node here (and never reach
                  * kmem_cache_alloc)
                  */
+                rtp = &get_cpu_var(radix_tree_preloads);
                 rtp = &__get_cpu_var(radix_tree_preloads);
                 if (rtp->nr) {
                         ret = rtp->nodes[rtp->nr - 1];
                         rtp->nodes[rtp->nr - 1] = NULL;
                         rtp->nr--;
                 }
+                put_cpu_var(radix_tree_preloads);
         }
         if (ret == NULL)
                 ret = kmem_cache_alloc(radix_tree_node_cachep, gfp_mask);
@@ -195,6 +197,8 @@ radix_tree_node_free(struct radix_tree_node *node)
         call_rcu(&node->rcu_head, radix_tree_node_rcu_free);
 }
 
+#ifndef CONFIG_PREEMPT_RT
+
 /*
  * Load up this CPU's radix_tree_node buffer with sufficient objects to
  * ensure that the addition of a single element in the tree cannot fail.  On
@@ -230,6 +234,8 @@ out:
 }
 EXPORT_SYMBOL(radix_tree_preload);
 
+#endif
+
 /*
  *      Return the maximum key which can be store into a
  *      radix tree with height HEIGHT.