linux-kernel - [PATCH] DOCUMENTATION: Fixed typo in an example in memory-barriers.txt

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Date:	Fri, 22 Aug 2014 23:05:08 -0700
From:	Ganesh Rapolu <ganesh.rapolu@...mail.com>
To:	rdunlap@...radead.org
CC:	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ganesh Rapolu <ganesh.rapolu@...mail.com>
Subject: [PATCH] DOCUMENTATION: Fixed typo in an example in memory-barriers.txt

In the first example in the memory-barriers.txt file, CPU 2 is assigned to
run (x = B; y = A;). However, the rest of the example proceeds as if CPU 2 had been
running (x = A; y = B;) as shown by the descriptions of the possible executions:

	STORE A=3,	STORE B=4,	x=LOAD A->3,	y=LOAD B->4
	STORE A=3,	STORE B=4,	y=LOAD B->4,	x=LOAD A->3
	STORE A=3,	x=LOAD A->3,	STORE B=4,	y=LOAD B->4
	STORE A=3,	x=LOAD A->3,	y=LOAD B->2,	STORE B=4
	STORE A=3,	y=LOAD B->2,	STORE B=4,	x=LOAD A->3
	STORE A=3,	y=LOAD B->2,	x=LOAD A->3,	STORE B=4
	STORE B=4,	STORE A=3,	x=LOAD A->3,	y=LOAD B->4
	STORE B=4, ...
	...

The change was merely to make the inital evironment consistent with what happens in the
rest of the example.

Signed-off-by: Ganesh Rapolu <ganesh.rapolu@...mail.com>
---
 Documentation/memory-barriers.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt
index a4de88f..9a46bbe 100644
--- a/Documentation/memory-barriers.txt
+++ b/Documentation/memory-barriers.txt
@@ -115,8 +115,8 @@ For example, consider the following sequence of events:
 	CPU 1		CPU 2
 	===============	===============
 	{ A == 1; B == 2 }
-	A = 3;		x = B;
-	B = 4;		y = A;
+	A = 3;		x = A;
+	B = 4;		y = B;
 
 The set of accesses as seen by the memory system in the middle can be arranged
 in 24 different combinations:
-- 
2.0.4

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