From: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Date: Tue, 14 Oct 2008 05:02:09 +0000 (+0000)
Subject: hvc_console: Add support for tty window resizing
X-Git-Tag: v2.6.28-rc1~58^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=febde3711992a64ea83a47a719f68a90c4b0927a;p=pandora-kernel.git

hvc_console: Add support for tty window resizing

The patch provides the hvc_resize() function to update the terminal
window dimensions (struct winsize) for a specified hvc console.
The function stores the new window size and schedules a function
that finally updates the tty winsize and signals the change to
user space (SIGWINCH).
Because the winsize update must acquire a mutex and might sleep,
the function is scheduled instead of being called from hvc_poll()
or khvcd.

This patch uses the tty_do_resize() routine from the tty layer.
A pending resize work is canceled in hvc_close() and hvc_hangup().

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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