Re: [BK fbdev] Yet again more fbdev updates.

[James Simmons]

> James,
>  the fbcon update seems to have broken the plain VGA console. I get a page
> fault at vgacon_scroll+0x144, the call sequence seems to be:
> 
> 	vt_console_print+0x203
> 	set_cursor+0x78
> 	vgacon_cursor+x0xb5

> 	scrup+0x122

Calling scrup is out of place. It is only called by lf() and csi_M() in 
the vt.c. lf() is used in vt_console_print but it is called before 
set_cursor(). Also vgacon_cursor doesn't call vgacon_scroll. It can call 
vgacon_scrolldelta. Now scrup does call vgacon_scroll. It looks like The 
code jumped from the middle of vt_console_print to scrup. Do you get the 
same error all the time? Also do you have Preemptible Kernel turned on?

> 	vgacon_scroll+0x144
> 
> I don't know what triggers it, since it seems to happen pretty randomly.
> 
> 		Linus
> 
>