console: Add callback to flush scrollback buffer to consw struct

This new callback is in preparation for persistent scrollback buffer
support for VGA consoles.
With a single scrollback buffer for all consoles, we could flush the
buffer just by invocating consw->con_switch(). But when each VGA console
has its own scrollback buffer, we need a new callback to tell the
video console driver which buffer to flush.

Signed-off-by: Manuel Schölling <[email protected]>
Reviewed-by: Andrey Utkin <[email protected]>
Tested-by: Andrey Utkin <[email protected]>
Tested-by: Adam Borowski <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

0 files changed, 0 insertions, 0 deletions