tree deb3764686dcbeb5ab013ecf6183d55c514f216f
parent a1c5a8932bbb75b550deb156d890027827fc9d6e
author Milton Miller <miltonm@bga.com> 1231380858 +0000
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1231818481 +1100

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>