[PATCH v2 tip/core/rcu 15/19] linux/rcutree: Convert to SPDX license identifier

[Paul E. McKenney]

Replace the license boiler plate with a SPDX license identifier.
While in the area, update an email address.

Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
[ paulmck: Update .h SPDX format per Joe Perches. ]
---
 include/linux/rcutree.h | 19 +++----------------
 1 file changed, 3 insertions(+), 16 deletions(-)

diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index 7f83179177d1..735601ac27d3 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -1,26 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Read-Copy Update mechanism for mutual exclusion (tree-based version)
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, you can access it online at
- * http://www.gnu.org/licenses/gpl-2.0.html.
- *
  * Copyright IBM Corporation, 2008
  *
  * Author: Dipankar Sarma <dipankar@xxxxxxxxxx>
- *	   Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> Hierarchical algorithm
+ *	   Paul E. McKenney <paulmck@xxxxxxxxxxxxx> Hierarchical algorithm
  *
- * Based on the original work by Paul McKenney <paulmck@xxxxxxxxxx>
+ * Based on the original work by Paul McKenney <paulmck@xxxxxxxxxxxxx>
  * and inputs from Rusty Russell, Andrea Arcangeli and Andi Kleen.
  *
  * For detailed explanation of Read-Copy Update mechanism see -
-- 
2.17.1