tree 695fea5b3782a263fb681e4f6ace2aed29d33f1d
parent 19a5ecde086a6a5287978b12ae948fa691b197b7
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1438451126 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1444155748 -0700

documentation: No acquire/release for RCU readers

Documentation/memory-barriers.txt calls out RCU as one of the sets
of primitives associated with ACQUIRE and RELEASE.  There really
is an association in that rcu_assign_pointer() includes a RELEASE
operation, but a quick read can convince people that rcu_read_lock() and
rcu_read_unlock() have ACQUIRE and RELEASE semantics, which they do not.

This commit therefore removes RCU from this list in order to avoid
this confusion.

Reported-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>