radix-tree: rename INDIRECT_PTR to INTERNAL_NODE

The name RADIX_TREE_INDIRECT_PTR doesn't really match the meaning.
RADIX_TREE_INTERNAL_NODE is a better name.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com>
Cc: Jan Kara <jack@suse.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 58f79fe..31d5929 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -68,7 +68,7 @@
 
 static inline void *ptr_to_indirect(void *ptr)
 {
-	return (void *)((unsigned long)ptr | RADIX_TREE_INDIRECT_PTR);
+	return (void *)((unsigned long)ptr | RADIX_TREE_INTERNAL_NODE);
 }
 
 #define RADIX_TREE_RETRY	ptr_to_indirect(NULL)