linux-kernel - [PATCH 4/3] docs: litmus-tests: Clarify about the RCU pre-initialization test

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Message-ID: <fd7e7c6f-fda1-7f2b-19f3-a09b73b10de8@gmail.com>
Date:   Wed, 13 May 2020 00:07:04 +0900
From:   Akira Yokosawa <akiyks@...il.com>
To:     "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Boqun Feng <boqun.feng@...il.com>,
        "Paul E. McKenney" <paulmck@...nel.org>
Cc:     linux-kernel@...r.kernel.org, vpillai@...italocean.com,
        Jonathan Corbet <corbet@....net>,
        Alan Stern <stern@...land.harvard.edu>,
        Andrea Parri <parri.andrea@...il.com>,
        Will Deacon <will@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Nicholas Piggin <npiggin@...il.com>,
        David Howells <dhowells@...hat.com>,
        Jade Alglave <j.alglave@....ac.uk>,
        Luc Maranget <luc.maranget@...ia.fr>,
        Daniel Lustig <dlustig@...dia.com>, linux-doc@...r.kernel.org,
        Akira Yokosawa <akiyks@...il.com>
Subject: [PATCH 4/3] docs: litmus-tests: Clarify about the RCU
 pre-initialization test

>From 7bb979aacd8788d174df8a56e9803ba9e5b7a381 Mon Sep 17 00:00:00 2001
From: Joel Fernandes (Google) <joel@...lfernandes.org>
Date: Mon, 11 May 2020 22:06:46 -0400
Subject: [PATCH 4/3] docs: litmus-tests: Clarify about the RCU pre-initialization test

Since this test returned to tools/memory-model/, make sure that it is
at least referenced from Documentation/litmus-tests/'s README.

Co-developed-by: Joel Fernandes (Google) <joel@...lfernandes.org>
Co-developed-by: Akira Yokosawa <akiyks@...il.com>
[Alan: grammar nit]
Suggested-by: Alan Stern <stern@...land.harvard.edu>
Signed-off-by: Joel Fernandes (Google) <joel@...lfernandes.org>
Signed-off-by: Akira Yokosawa <akiyks@...il.com>
---
I said in the earlier message:

> The explanation under tools/memory-model/litmus-tests/README also need the same
> rewording.

, but obviously I was confused. It is good as is.

This is on top of my earlier patch series.

Joel, Alan, does this work with you?

        Thanks, Akira
--
 Documentation/litmus-tests/README | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/litmus-tests/README b/Documentation/litmus-tests/README
index ac0b270b456c..b79e640214b9 100644
--- a/Documentation/litmus-tests/README
+++ b/Documentation/litmus-tests/README
@@ -24,6 +24,10 @@ Atomic-RMW-ops-are-atomic-WRT-atomic_set.litmus
 RCU (/rcu directory)
 --------------------
 
+MP+onceassign+derefonce.litmus (under tools/memory-model/litmus-tests/)
+    Demonstrates the use of rcu_assign_pointer() and rcu_dereference() to
+    ensure that an RCU reader will not see pre-initialization garbage.
+
 RCU+sync+read.litmus
 RCU+sync+free.litmus
     Both the above litmus tests demonstrate the RCU grace period guarantee
-- 
2.17.1