[PATCH] maple_tree: use xa_is_internal() for better reading

[Wei Yang]

If entry is a special case, we need to expand root to store it. This
case is exactly the case of xa_is_internal().

Let's use xa_is_internal() for the check, which is friendly for
audience.

Signed-off-by: Wei Yang <richard.weiyang at gmail.com>
---
 lib/maple_tree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index aa3a5df15b8e..d39b0bceb802 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -3515,7 +3515,7 @@ static inline void mas_store_root(struct ma_state *mas, void *entry)
 {
 	if (likely((mas->last != 0) || (mas->index != 0)))
 		mas_root_expand(mas, entry);
-	else if (((unsigned long) (entry) & 3) == 2)
+	else if (xa_is_internal(entry))
 		mas_root_expand(mas, entry);
 	else {
 		rcu_assign_pointer(mas->tree->ma_root, entry);
-- 
2.34.1