From: Milton Miller <miltonm@bga.com>
Date: Thu, 8 Jan 2009 02:14:18 +0000 (+0000)
Subject: hvc_console: Change an mb() to smp_mb() and add some comments
X-Git-Tag: v2.6.29-rc2~76^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9fef3d2d15ae8ca24e4a145f2e189eea145d18c2;p=pandora-kernel.git

hvc_console: Change an mb() to smp_mb() and add some comments

I remember some history on this barrier.  There was a race between
open via /dev/console and the tty being fully setup.  Its also why
there is a temporary variable and the global is assigned at the end
of the function.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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