[PATCH v4 1/5] maple_tree: print empty for an empty tree on mt_dump()

[Wei Yang <richard.weiyang@gmail.com>]

Currently for an empty tree, it would print:

  maple_tree(0x7ffcd02c6ee0) flags 1, height 0 root (nil)
  0: (nil)

This is a little misleading.

Let's print (empty) for an empty tree.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
CC: Liam R. Howlett <Liam.Howlett@Oracle.com>
CC: Sidhartha Kumar <sidhartha.kumar@oracle.com>
CC: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
---
 lib/maple_tree.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 3619301dda2e..21e6895b7aef 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -7287,10 +7287,12 @@ void mt_dump(const struct maple_tree *mt, enum mt_dump_format format)
 
 	pr_info("maple_tree(%p) flags %X, height %u root %p\n",
 		 mt, mt->ma_flags, mt_height(mt), entry);
-	if (!xa_is_node(entry))
-		mt_dump_entry(entry, 0, 0, 0, format);
-	else if (entry)
+	if (xa_is_node(entry))
 		mt_dump_node(mt, entry, 0, mt_node_max(entry), 0, format);
+	else if (entry)
+		mt_dump_entry(entry, 0, 0, 0, format);
+	else
+		pr_info("(empty)\n");
 }
 EXPORT_SYMBOL_GPL(mt_dump);
 
-- 
2.34.1