linux-kernel - Re: [PATCH] Introduce buflock, a one-to-many circular buffer mechanism (rev2)

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Date:	Sun, 20 Jun 2010 22:13:11 +0200
From:	Henrik Rydberg <rydberg@...math.org>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>, Jiri Kosina <jkosina@...e.cz>,
	Jonathan Cameron <jic23@....ac.uk>
Subject: Re: [PATCH] Introduce buflock, a one-to-many circular buffer mechanism
 (rev2)

...

diff --git a/include/linux/buflock.h b/include/linux/buflock.h
index 3d5df22..05996d5 100644
--- a/include/linux/buflock.h
+++ b/include/linux/buflock.h
@@ -125,8 +125,8 @@ static inline unsigned int bufwrite_at(const struct buflock_
writer *bw)
  */
 static inline void bufwrite_unlock(struct buflock_writer *bw)
 {
-	++bw->head;
 	smp_wmb();
+	++bw->head;
 }

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