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| author | David S. Miller <davem@davemloft.net> | 2008-02-23 20:38:20 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-02-23 20:38:20 -0800 |
| commit | 8d3c202be23c5a915f7053ebd4e96f44700c6a62 (patch) | |
| tree | e0f017aff86d3ad0b858fe85f44e11096087ed00 /Documentation/atomic_ops.txt | |
| parent | 1b04ab4597725f75f94942da9aa40daa7b9a4bd9 (diff) | |
| parent | 038eb0ea04b245351be34b0ae76b55eee4603989 (diff) | |
Merge branch 'master' of ../linux-2.6/
Diffstat (limited to 'Documentation/atomic_ops.txt')
| -rw-r--r-- | Documentation/atomic_ops.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/atomic_ops.txt b/Documentation/atomic_ops.txt index f20c10c2858..4ef24501045 100644 --- a/Documentation/atomic_ops.txt +++ b/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) |