linux-kernel - [PATCH] a minor fix for set_mb() in Documentation/memory-barriers.txt

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Message-ID: <20061106150329.GA226@oleg>
Date:	Mon, 6 Nov 2006 18:03:29 +0300
From:	Oleg Nesterov <oleg@...sign.ru>
To:	David Howells <dhowells@...hat.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Andrew Morton <akpm@...l.org>,
	Linus Torvalds <torvalds@...l.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] a minor fix for set_mb() in Documentation/memory-barriers.txt

set_mb() is used by set_current_state() which needs mb(), not wmb().
I think it would be right to assume that set_mb() implies mb(), all
arches seem to do just this.

Signed-off-by: Oleg Nesterov <oleg@...sign.ru>

--- d/Documentation/memory-barriers.txt~	2006-11-06 17:43:36.000000000 +0300
+++ d/Documentation/memory-barriers.txt	2006-11-06 17:44:26.000000000 +0300
@@ -1016,7 +1016,7 @@ There are some more advanced barrier fun
 
  (*) set_mb(var, value)
 
-     This assigns the value to the variable and then inserts at least a write
+     This assigns the value to the variable and then inserts a full memory
      barrier after it, depending on the function.  It isn't guaranteed to
      insert anything more than a compiler barrier in a UP compilation.
 

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