From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 9 Sep 2011 23:45:42 +0000 (-0400)
Subject: um: switch line.c tty drivers to dynamic device creation
X-Git-Tag: v3.4-rc1~81^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cfe6b7c79daa0efa27f474f1fe2a88fd7af5cc47;p=pandora-kernel.git

um: switch line.c tty drivers to dynamic device creation

Current code doesn't update the symlinks in /sys/dev/char when we add/remove
tty lines.  Fixing that allows to stop messing with ->valid before the driver
registration, which is a Good Thing(tm) - we shouldn't have it set before we
really have the things set up and ready for line_open().

We need tty_driver available to call tty_{un,}register_device(), so we just
stash a reference to it into struct line_driver.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
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