kexec and framebuffer

[Kalev Lember <kalev@smartlink.ee>]

Hello,

Kexec skips video initialization code and because of that framebuffer
does not work with relocated kernels.
Like Eric W. Biederman pointed out in
http://www.ussg.iu.edu/hypermail/linux/kernel/0508.0/1674.html ,
screen_info structure from include/linux/tty.h must be passed along to
maintain current video mode.

I made some testing and it's enough to dump screen_info structure from
running kernel and overwrite this info in kexec' x86-linux-setup.c.

I am wondering what would be the preferred method to extract screen_info
from running kernel. Should this be made available from sysfs or maybe a
new system call be created?

-- 
Kalev Lember
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