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SubjectRe: fbcon: remove soft scrollback code (missing Doc. patch)
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@linux-foundation.org>
>> AuthorDate: Mon Sep 7 11:45:27 2020 -0700
>> Committer: Linus Torvalds <torvalds@linux-foundation.org>
>> 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@linux-foundation.org>
>> AuthorDate: Wed Sep 9 14:53:50 2020 -0700
>> Committer: Linus Torvalds <torvalds@linux-foundation.org>
>> 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
>
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