From 3f944adb9d1ca912902783e7aede2a5b5c19a605 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Mon, 4 Mar 2013 17:55:49 -0800 Subject: rcu: Documentation update This commit applies a few updates based on a quick review of the RCU documentations. Signed-off-by: Paul E. McKenney --- Documentation/RCU/lockdep.txt | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'Documentation/RCU/lockdep.txt') diff --git a/Documentation/RCU/lockdep.txt b/Documentation/RCU/lockdep.txt index a102d4b3724..cd83d2348fe 100644 --- a/Documentation/RCU/lockdep.txt +++ b/Documentation/RCU/lockdep.txt @@ -64,6 +64,11 @@ checking of rcu_dereference() primitives: but retain the compiler constraints that prevent duplicating or coalescsing. This is useful when when testing the value of the pointer itself, for example, against NULL. + rcu_access_index(idx): + Return the value of the index and omit all barriers, but + retain the compiler constraints that prevent duplicating + or coalescsing. This is useful when when testing the + value of the index itself, for example, against -1. The rcu_dereference_check() check expression can be any boolean expression, but would normally include a lockdep expression. However, -- cgit v1.2.3-70-g09d2