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-rw-r--r--include/linux/rbtree.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h
index a5aa7ae..b690009 100644
--- a/include/linux/rbtree.h
+++ b/include/linux/rbtree.h
@@ -50,7 +50,7 @@ struct rb_root {
#define RB_ROOT (struct rb_root) { NULL, }
#define rb_entry(ptr, type, member) container_of(ptr, type, member)
-#define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL)
+#define RB_EMPTY_ROOT(root) (READ_ONCE((root)->rb_node) == NULL)
/* 'empty' nodes are nodes that are known not to be inserted in an rbtree */
#define RB_EMPTY_NODE(node) \
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