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

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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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Milton Miller 2009-01-08 02:14:18 +00:00 • committed by Benjamin Herrenschmidt

parent a1c5a8932b

commit 9fef3d2d15

1 changed files with 5 additions and 2 deletions

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drivers/char/hvc_console.c

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