From a4b32a9ab6e30d0b35d614d446b86923e1f6ccc2 Mon Sep 17 00:00:00 2001
From: Aaron Schulz <aaron@users.mediawiki.org>
Date: Thu, 30 Oct 2008 16:17:37 +0000
Subject: [PATCH] Make getSubjectPage return $this if the title is the same.
 This avoids process cache loss.

---
 includes/Title.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/includes/Title.php b/includes/Title.php
index 53ba1d05da..eb9e2b132a 100644
--- a/includes/Title.php
+++ b/includes/Title.php
@@ -2258,7 +2258,12 @@ class Title {
 	 * @return \type{Title} the object for the subject page
 	 */
 	public function getSubjectPage() {
-		return Title::makeTitle( MWNamespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
+		// Is this the same title?
+		$subjectNS = MWNamespace::getSubject( $this->getNamespace() );
+		if( $this->getNamespace() == $subjectNS ) {
+			return $this;
+		}
+		return Title::makeTitle( $subjectNS, $this->getDBkey() );
 	}
 
 	/**
-- 
2.20.1