linux-kernel - [PATCH rcu 06/15] doc: Update rcu.rst

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Date:   Wed,  4 Jan 2023 16:09:46 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...a.com,
        rostedt@...dmis.org, "Paul E. McKenney" <paulmck@...nel.org>
Subject: [PATCH rcu 06/15] doc: Update rcu.rst

This commit provides a couple of updates based on the inexorable passage
of time.

Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 Documentation/RCU/rcu.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/RCU/rcu.rst b/Documentation/RCU/rcu.rst
index 3cfe01ba9a494..381cb86f657d8 100644
--- a/Documentation/RCU/rcu.rst
+++ b/Documentation/RCU/rcu.rst
@@ -77,12 +77,13 @@ Frequently Asked Questions
   search for the string "Patent" in Documentation/RCU/RTFP.txt to find them.
   Of these, one was allowed to lapse by the assignee, and the
   others have been contributed to the Linux kernel under GPL.
+  Many (but not all) have long since expired.
   There are now also LGPL implementations of user-level RCU
   available (https://liburcu.org/).
 
 - I hear that RCU needs work in order to support realtime kernels?
 
-  Realtime-friendly RCU can be enabled via the CONFIG_PREEMPT_RCU
+  Realtime-friendly RCU are enabled via the CONFIG_PREEMPTION
   kernel configuration parameter.
 
 - Where can I find more information on RCU?
-- 
2.31.1.189.g2e36527f23