Re: fbcon: remove soft scrollback code (missing Doc. patch)

[Bhaskar Chowdhury]

On 18:18 Mon 14 Sep 2020, Randy Dunlap wrote:
> HI--
>
> On 9/14/20 3:48 PM, Linux Kernel Mailing List wrote:
> > Commit:     50145474f6ef4a9c19205b173da6264a644c7489
> > Parent:     856deb866d16e29bd65952e0289066f6078af773
> > Refname:    refs/heads/master
> > Web:        https://git.kernel.org/torvalds/c/50145474f6ef4a9c19205b173da6264a644c7489
> > Author:     Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> > AuthorDate: Mon Sep 7 11:45:27 2020 -0700
> > Committer:  Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> > CommitDate: Mon Sep 14 10:06:15 2020 -0700
> >
> >     fbcon: remove soft scrollback code
> >     
> >     This (and the VGA soft scrollback) turns out to have various nasty small
> >     special cases that nobody really is willing to fight.  The soft
> >     scrollback code was really useful a few decades ago when you typically
> >     used the console interactively as the main way to interact with the
> >     machine, but that just isn't the case any more.
>
> and:
>
> > Commit:     973c096f6a85e5b5f2a295126ba6928d9a6afd45
> > Parent:     06a0df4d1b8b13b551668e47b11fd7629033b7df
> > Refname:    refs/heads/master
> > Web:        https://git.kernel.org/torvalds/c/973c096f6a85e5b5f2a295126ba6928d9a6afd45
> > Author:     Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> > AuthorDate: Wed Sep 9 14:53:50 2020 -0700
> > Committer:  Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> > CommitDate: Mon Sep 14 10:06:15 2020 -0700
> >
> >     vgacon: remove software scrollback support
>
>
>
> diffstats:
>
> > ---
> >  drivers/video/fbdev/core/fbcon.c | 334 +--------------------------------------
> >  1 file changed, 4 insertions(+), 330 deletions(-)
>
> >  arch/powerpc/configs/pasemi_defconfig |   1 -
> >  arch/powerpc/configs/ppc6xx_defconfig |   1 -
> >  arch/x86/configs/i386_defconfig       |   1 -
> >  arch/x86/configs/x86_64_defconfig     |   1 -
> >  drivers/video/console/Kconfig         |  46 -------
> >  drivers/video/console/vgacon.c        | 221 +---------------------------------
> >  6 files changed, 1 insertion(+), 270 deletions(-)
>
>
>
>
> Now someone can remove the documentation for scrollback (and "no-scroll")...
If you wont mind ...let me stab at it ...

Documentation/admin-guide/kernel-parameters.txt:        no-scroll       [VGA] Disables scrollback.
Documentation/fb/fbcon.rst:2. fbcon=scrollback:<value>[k]
Documentation/fb/fbcon.rst:     The scrollback buffer is memory that is used to preserve display
Documentation/fb/matroxfb.rst:   with 'video=scrollback:0'.
Documentation/fb/sstfb.rst:  disable software scrollback, as it can oops badly ...
Documentation/fb/vesafb.rst:            * You'll get scrollback (the Shift-PgUp thing),
Documentation/fb/vesafb.rst:              the video memory can be used as scrollback buffer


~Bhaskar
> --
> ~Randy

Attachment: signature.asc
Description: PGP signature