Nicolas Pitre 3f4ef485be vt: fix scrollback flushing on background consoles ... Commit a6dbe44275 ("vt: perform safe console erase in the right order") provided fixes to an earlier commit by gathering all console scrollback flushing operations in a function of its own. This includes the invocation of vc_sw->con_switch() as previously done through a update_screen() call. That commit failed to carry over the con_is_visible() conditional though, as well as cursor handling, which caused problems when "\e[3J" was written to a background console. One could argue for preserving the call to update_screen(). However this does far more than we need, and it is best to remove scrollback assumptions from it. Instead let's gather the minimum needed to actually perform scrollback flushing properly in that one place. While at it, let's document the vc_sw->con_switch() side effect being relied upon. Signed-off-by: Nicolas Pitre <nico@fluxnic.net> Reported-and-tested-by: Lukas Wunner <lukas@wunner.de> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/nycvar.YSQ.7.76.2001281205560.1655@knanqh.ubzr Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-02-10 13:51:44 -08:00
..
.gitignore	tty: vt: move conmakehash to drivers/tty/vt/ from scripts/	2019-12-17 14:42:46 +01:00
conmakehash.c	tty: vt: move conmakehash to drivers/tty/vt/ from scripts/	2019-12-17 14:42:46 +01:00
consolemap.c	tty/vt: avoid high order pages allocation on GIO_UNIMAP ioctl	2019-04-16 15:21:34 +02:00
cp437.uni	tty: fix up a few remaining files without SPDX identifiers	2019-04-04 18:48:43 +02:00
defkeymap.c_shipped	tty: fix up a few remaining files without SPDX identifiers	2019-04-04 18:48:43 +02:00
defkeymap.map	tty: fix up a few remaining files without SPDX identifiers	2019-04-04 18:48:43 +02:00
keyboard.c	tty: vt: keyboard: reject invalid keycodes	2019-11-23 18:31:07 +01:00
Makefile	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
selection.c	vt: selection: allow functions to be called from inside kernel	2019-04-19 15:09:10 +02:00
vc_screen.c	vcs: prevent write access to vcsu devices	2019-11-27 07:47:17 +01:00
vt_ioctl.c	Merge branch 'work.tty-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-10-24 14:43:41 +01:00
vt.c	vt: fix scrollback flushing on background consoles	2020-02-10 13:51:44 -08:00