svn commit: r254783 - stable/9/include

[Ed Maste]

Author: emaste
Date: Sat Aug 24 13:49:43 2013
New Revision: 254783
URL: http://svnweb.freebsd.org/changeset/base/254783

Log:
  MFC r254465: Correct implementation of atomic_flag_test_and_set
  
  (This is a direct commit to stable/9 as atomic_flag_test_and_set_explicit
  is an inline function on HEAD and in a different file.)

Modified:
  stable/9/include/stdatomic.h

Modified: stable/9/include/stdatomic.h
==============================================================================
--- stable/9/include/stdatomic.h	Sat Aug 24 13:42:20 2013	(r254782)
+++ stable/9/include/stdatomic.h	Sat Aug 24 13:49:43 2013	(r254783)
@@ -317,7 +317,7 @@ typedef atomic_bool			atomic_flag;
 #define	atomic_flag_clear_explicit(object, order)			\
 	atomic_store_explicit(object, 0, order)
 #define	atomic_flag_test_and_set_explicit(object, order)		\
-	atomic_compare_exchange_strong_explicit(object, 0, 1, order, order)
+	atomic_exchange_explicit(object, 1, order)
 
 #define	atomic_flag_clear(object)					\
 	atomic_flag_clear_explicit(object, memory_order_seq_cst)