tree 27f975fe9b3bd3b99a1a7043c34cf32176b7067d
parent 3feebbb5492e9e463467cefb633e23a3dfcec132
author Hendrik Brueckner <brueckner@linux.vnet.ibm.com> 1223960529 +0000
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1224633625 +1100

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>