1 files changed, 31 insertions, 0 deletions
diff --git a/REORG.TODO/nptl/pthread_spin_unlock.c b/REORG.TODO/nptl/pthread_spin_unlock.c
new file mode 100644
index 0000000000..f83b69639a
--- /dev/null
+++ b/REORG.TODO/nptl/pthread_spin_unlock.c
@@ -0,0 +1,31 @@
+/* pthread_spin_unlock -- unlock a spin lock.  Generic version.
+   Copyright (C) 2003-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "pthreadP.h"
+#include <atomic.h>
+
+int
+pthread_spin_unlock (pthread_spinlock_t *lock)
+{
+  /* The atomic_store_release synchronizes-with the atomic_exchange_acquire
+     or atomic_compare_exchange_weak_acquire in pthread_spin_lock /
+     pthread_spin_trylock.  */
+  atomic_store_release (lock, 0);
+  return 0;
+}