rcu: Make bugginess of code sample more evident

One of the code samples in whatisRCU.txt shows a bug, but someone scanning
the document quickly might mistake it for a valid use of RCU.  Add some
screaming comments to help keep speed-readers on track.

Reported-by: Nathan Zimmer <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
Acked-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Paul E. McKenney 2013-02-12 07:56:27 -08:00
commit 4357fb570b

View file

@ -265,9 +265,9 @@ rcu_dereference()
rcu_read_lock();
p = rcu_dereference(head.next);
rcu_read_unlock();
x = p->address;
x = p->address; /* BUG!!! */
rcu_read_lock();
y = p->data;
y = p->data; /* BUG!!! */
rcu_read_unlock();
Holding a reference from one RCU read-side critical section