From 4357fb570b3709c145384065d04b698a30dc722e Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Tue, 12 Feb 2013 07:56:27 -0800 Subject: [PATCH] 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 Signed-off-by: Paul E. McKenney Acked-by: Rafael J. Wysocki --- Documentation/RCU/whatisRCU.txt | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt index 0cc7820967f4..10df0b82f459 100644 --- a/Documentation/RCU/whatisRCU.txt +++ b/Documentation/RCU/whatisRCU.txt @@ -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