[PATCH RFC tip/core/rcu 2/3] documentation: Add long atomic examples to memory-barriers.txt

[Paul E. McKenney]

From: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>

Although the atomic_long_t functions are quite useful, they are a bit
obscure.  This commit therefore adds the common ones alongside their
atomic_t counterparts in Documentation/memory-barriers.txt.

Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
---
 Documentation/memory-barriers.txt | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt
index eccc83a40ce1..d49fb6b48c86 100644
--- a/Documentation/memory-barriers.txt
+++ b/Documentation/memory-barriers.txt
@@ -1726,21 +1726,23 @@ explicit lock operations, described later).  These include:
 
 	xchg();
 	cmpxchg();
-	atomic_xchg();
-	atomic_cmpxchg();
-	atomic_inc_return();
-	atomic_dec_return();
-	atomic_add_return();
-	atomic_sub_return();
-	atomic_inc_and_test();
-	atomic_dec_and_test();
-	atomic_sub_and_test();
-	atomic_add_negative();
-	atomic_add_unless();	/* when succeeds (returns 1) */
+	atomic_xchg();			atomic_long_xchg();
+	atomic_cmpxchg();		atomic_long_cmpxchg();
+	atomic_inc_return();		atomic_long_inc_return();
+	atomic_dec_return();		atomic_long_dec_return();
+	atomic_add_return();		atomic_long_add_return();
+	atomic_sub_return();		atomic_long_sub_return();
+	atomic_inc_and_test();		atomic_long_inc_and_test();
+	atomic_dec_and_test();		atomic_long_dec_and_test();
+	atomic_sub_and_test();		atomic_long_sub_and_test();
+	atomic_add_negative();		atomic_long_add_negative();
 	test_and_set_bit();
 	test_and_clear_bit();
 	test_and_change_bit();
 
+	/* when succeeds (returns 1) */
+	atomic_add_unless();		atomic_long_add_unless();
+
 These are used for such things as implementing LOCK-class and UNLOCK-class
 operations and adjusting reference counters towards object destruction, and as
 such the implicit memory barrier effects are necessary.
-- 
1.8.1.5

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