maple_tree: Add root expand to node if the single entry ends in 10.

As requested by page cache.

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 7625fcd967b5a9c526ee6962b2629c3d9330046b..d012855a23220f3b2402af85c73db6965a8d647b 100644 (file)
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -941,7 +941,12 @@ void ma_insert(struct ma_state *mas, void *entry)
                if (mas->last == 0) {
                        if (mas->node != NULL)
                                goto exists;
-                       rcu_assign_pointer(mas->tree->ma_root, entry);
+
+                       if (((unsigned long) (entry) & 3) == 2)
+                               ma_root_expand(mas, entry);
+                       else
+                               rcu_assign_pointer(mas->tree->ma_root, entry);
+
                        return;
                }
                ma_root_expand(mas, entry);