[PATCH 1/4] tools/memory-model: docs/README: Update introduction of locking.txt

[Akira Yokosawa <akiyks@gmail.com>]

Commit 9bc931e9e161 ("tools/memory-model: Add locking.txt and
glossary.txt to README") failed to mention the relation of the "Locking"
section in recipes.txt and locking.txt. 

The latter is a detailed version of the former intended to be read on
its own.

Reword the description in README and add notes in locking.txt and
recipes.txt to clarify their relationship.

Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
---
 tools/memory-model/Documentation/README      | 7 +++++--
 tools/memory-model/Documentation/locking.txt | 5 +++++
 tools/memory-model/Documentation/recipes.txt | 4 ++++
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/tools/memory-model/Documentation/README b/tools/memory-model/Documentation/README
index 9999c1effdb6..43602f7822ec 100644
--- a/tools/memory-model/Documentation/README
+++ b/tools/memory-model/Documentation/README
@@ -23,8 +23,11 @@ o	You are familiar with the Linux-kernel concurrency primitives
 	that you need, and just want to get started with LKMM litmus
 	tests:  litmus-tests.txt
 
-o	You would like to access lock-protected shared variables without
-	having their corresponding locks held:  locking.txt
+o	Your immediate concern is to access lock-protected shared variables
+	without holding their corresponding locks:  locking.txt
+
+	While it is an expanded version of section "Locking" in recipes.txt,
+	it is supposed to be readable on its own.
 
 o	You are familiar with Linux-kernel concurrency, and would
 	like a detailed intuitive understanding of LKMM, including
diff --git a/tools/memory-model/Documentation/locking.txt b/tools/memory-model/Documentation/locking.txt
index 65c898c64a93..b29b3a978df3 100644
--- a/tools/memory-model/Documentation/locking.txt
+++ b/tools/memory-model/Documentation/locking.txt
@@ -1,3 +1,8 @@
+[!] Note:
+	This is an expanded version of section "Locking" in recipes.txt
+	focusing on accessing lock-protected shared variables without
+	holding their corresponding locks.
+
 Locking
 =======
 
diff --git a/tools/memory-model/Documentation/recipes.txt b/tools/memory-model/Documentation/recipes.txt
index 03f58b11c252..ce531767adfd 100644
--- a/tools/memory-model/Documentation/recipes.txt
+++ b/tools/memory-model/Documentation/recipes.txt
@@ -61,6 +61,10 @@ usual) some things to be careful of:
 Locking
 -------
 
+[!] Note:
+	locking.txt expands on this section, focusing on accessing lock-
+	protected shared variables without holding their corresponding locks.
+
 Locking is well-known and straightforward, at least if you don't think
 about it too hard.  And the basic rule is indeed quite simple: Any CPU that
 has acquired a given lock sees any changes previously seen or made by any
-- 
2.34.1