[PATCH v6 0/2] console: Add persistent scrollback buffers for all VGA consoles

["Manuel Schölling" <manuel.schoelling@gmx.de>]

Changes in v6:
  - Change of check if feature is enabled in 
    vgacon_scrollback_switch()
Changes in v5:
  - Clearify documentation
  - Skip superfluous array initialization
  - Disable scrollback if buffer allocation fails
  - Refactor vgacon_switch_scrollback()
  - Rename vgacon_switch_scrollback() to vgacon_scrollback_switch()
  - Add check for fg_console in vgacon_scrollback_update
Changes in v4.1:
  - Fix compiler error
Changes in v4:
  - Rename from VGACON_SOFT_SCROLLBACK_FOR_EACH_CONSOLE to
    VGACON_SOFT_SCROLLBACK_PERSISTENT
  - Split into two patches
  - Rework documentation
  - Remove cosmetic changes in comments (postponed)
Changes in v3:
  - Add config option for this feature
  - Fallback to old scrollback buffer if kcalloc() fails
  - Remove ioctl() call again and add documentation about existing
    escape sequence to flush the scrollback buffer
Changes in v2:
  - Add ioctl() call to flush scrollback buffer
  - (Patch v2 was not labeled as such, sorry)

Manuel Schölling (2):
  console: Move scrollback data into its own struct
  console: Add persistent scrollback buffers for all VGA consoles

 drivers/video/console/Kconfig  |  25 ++++++-
 drivers/video/console/vgacon.c | 149 +++++++++++++++++++++++++++--------------
 2 files changed, 120 insertions(+), 54 deletions(-)

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2.1.4