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yaml --- r: 86252 b: refs/heads/master c: 02c608c h: refs/heads/master v: v3
git-mirror · Feb 24, 2008 · 335aa20 · 335aa20
1 parent d0fe812
commit 335aa20
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Showing 3 changed files with 4 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2dda81ca31dc73e695ff8b83351f7aaefbef192a
+refs/heads/master: 02c608c1fefe821a4c6fc34c45a0dea3cebf4764
diff --git a/trunk/Documentation/atomic_ops.txt b/trunk/Documentation/atomic_ops.txt
@@ -186,7 +186,8 @@ If the atomic value v is not equal to u, this function adds a to v, and
 returns non zero. If v is equal to u then it returns zero. This is done as
 an atomic operation.
 
-atomic_add_unless requires explicit memory barriers around the operation.
+atomic_add_unless requires explicit memory barriers around the operation
+unless it fails (returns 0).
 
 atomic_inc_not_zero, equivalent to atomic_add_unless(v, 1, 0)
 

diff --git a/trunk/Documentation/memory-barriers.txt b/trunk/Documentation/memory-barriers.txt
@@ -1493,7 +1493,7 @@ explicit lock operations, described later).  These include:
 	atomic_dec_and_test();
 	atomic_sub_and_test();
 	atomic_add_negative();
-	atomic_add_unless();
+	atomic_add_unless();	/* when succeeds (returns 1) */
 	test_and_set_bit();
 	test_and_clear_bit();
 	test_and_change_bit();