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Diffstat (limited to 'Documentation/RCU/lockdep.txt')
| -rw-r--r-- | Documentation/RCU/lockdep.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/RCU/lockdep.txt b/Documentation/RCU/lockdep.txt index a102d4b3724b..cd83d2348fef 100644 --- a/Documentation/RCU/lockdep.txt +++ b/Documentation/RCU/lockdep.txt | |||
| @@ -64,6 +64,11 @@ checking of rcu_dereference() primitives: | |||
| 64 | but retain the compiler constraints that prevent duplicating | 64 | but retain the compiler constraints that prevent duplicating |
| 65 | or coalescsing. This is useful when when testing the | 65 | or coalescsing. This is useful when when testing the |
| 66 | value of the pointer itself, for example, against NULL. | 66 | value of the pointer itself, for example, against NULL. |
| 67 | rcu_access_index(idx): | ||
| 68 | Return the value of the index and omit all barriers, but | ||
| 69 | retain the compiler constraints that prevent duplicating | ||
| 70 | or coalescsing. This is useful when when testing the | ||
| 71 | value of the index itself, for example, against -1. | ||
| 67 | 72 | ||
| 68 | The rcu_dereference_check() check expression can be any boolean | 73 | The rcu_dereference_check() check expression can be any boolean |
| 69 | expression, but would normally include a lockdep expression. However, | 74 | expression, but would normally include a lockdep expression. However, |