This is a note to let you know that I've just added the patch titled tty: vt, consw->con_scrolldelta cleanup to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tty-vt-consw-con_scrolldelta-cleanup.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 97293de977365fe672daec2523e66ef457104921 Mon Sep 17 00:00:00 2001 From: Jiri Slaby <jirislaby@xxxxxxxxxx> Date: Thu, 23 Jun 2016 13:34:26 +0200 Subject: tty: vt, consw->con_scrolldelta cleanup From: Jiri Slaby <jslaby@xxxxxxx> commit 97293de977365fe672daec2523e66ef457104921 upstream. * allow NULL consw->con_scrolldelta (some consoles define an empty hook) * => remove empty hooks now * return value of consw->con_scrolldelta is never checked => make the function void * document consw->con_scrolldelta a bit Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> Cc: Thomas Winischhofer <thomas@xxxxxxxxxxxxxxxx> Cc: linux-usb@xxxxxxxxxxxxxxx Cc: Jean-Christophe Plagniol-Villard <plagnioj@xxxxxxxxxxxx> Cc: Tomi Valkeinen <tomi.valkeinen@xxxxxx> Cc: "James E.J. Bottomley" <jejb@xxxxxxxxxxxxxxxx> Cc: Helge Deller <deller@xxxxxx> Cc: linux-fbdev@xxxxxxxxxxxxxxx Cc: linux-parisc@xxxxxxxxxxxxxxx Cc: Ajay Kaher <akaher@xxxxxxxxxx> [ for 4.4.y backport, only do the first change above, to prevent .con_scrolldelta from being called if not present - gregkh] Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/tty/vt/vt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -2484,7 +2484,7 @@ static void console_callback(struct work if (scrollback_delta) { struct vc_data *vc = vc_cons[fg_console].d; clear_selection(); - if (vc->vc_mode == KD_TEXT) + if (vc->vc_mode == KD_TEXT && vc->vc_sw->con_scrolldelta) vc->vc_sw->con_scrolldelta(vc, scrollback_delta); scrollback_delta = 0; } Patches currently in stable-queue which might be from jirislaby@xxxxxxxxxx are queue-4.4/tty-vt-consw-con_scrolldelta-cleanup.patch