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Subject[PATCH 4.4 20/46] fbcon: remove soft scrollback code
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> @@ -3378,7 +3054,6 @@ static const struct consw fb_con = {
> .con_font_default = fbcon_set_def_font,
> .con_font_copy = fbcon_copy_font,
> .con_set_palette = fbcon_set_palette,
> - .con_scrolldelta = fbcon_scrolldelta,
> .con_set_origin = fbcon_set_origin,
> .con_invert_region = fbcon_invert_region,
> .con_screen_pos = fbcon_screen_pos,

If I am not wrong, this change creates crash in v4.4.y.
As before calling con_scrolldelta, NULL check is missing inside
console_callback() for v4.4.y, refer:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/drivers/tty/vt/vt.c?h=linux-4.4.y#n2487

This NULL check was added in commit 97293de977365fe672daec2523e66ef457104921,
and this is not merged to v4.4.y

-Ajay

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