Diffstat (limited to 'Documentation/RCU/whatisRCU.txt')
1 files changed, 4 insertions, 4 deletions
diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt
index 981651a8b65d..7e1a8721637a 100644
@@ -212,7 +212,7 @@ synchronize_rcu()
- typeof(p) rcu_assign_pointer(p, typeof(p) v);
+ void rcu_assign_pointer(p, typeof(p) v);
Yes, rcu_assign_pointer() -is- implemented as a macro, though it
would be cool to be able to declare a function in this manner.
@@ -220,9 +220,9 @@ rcu_assign_pointer()
The updater uses this function to assign a new value to an
RCU-protected pointer, in order to safely communicate the change
- in value from the updater to the reader. This function returns
- the new value, and also executes any memory-barrier instructions
- required for a given CPU architecture.
+ in value from the updater to the reader. This macro does not
+ evaluate to an rvalue, but it does execute any memory-barrier
+ instructions required for a given CPU architecture.
Perhaps just as important, it serves to document (1) which
pointers are protected by RCU and (2) the point at which a