Re: [Linux-fbdev-devel] [PATCH 0/2] fbdev: add fillrect and copyarea ioctls

[Ali G. R. <al...@ru...>]

Greg KH <gr...@su...> wrote:
> On Mon, Jul 13, 2009 at 07:47:09PM +0430, Ali Gholami Rudi wrote:
> > Is there any reason for not adding these ioctls to fbdev?  I searched
> > the net and couldn't any.  Anyway, these patches simply implement those
> > ioctls.
> 
> Have you also added the needed 32 vs. 64 bit handlers for these ioctls?

I guess Arnd's patch will do.

By the way, it should check for overflows, too?  I mean should I change
this:

> +       if (copy->dx + copy->width > info->var.xres ||
> +           copy->sx + copy->width > info->var.xres ||
> +           copy->dy + copy->height > info->var.yres ||
> +           copy->sy + copy->height > info->var.yres) {

#define ISSUMLESSTHAN(a, b, s)	(((a) <= (s)) && ((b) <= (s)) && \
				 ((a) + (b) <= (s)))

if (!ISSUMLESSTHAN(copy->dx, copy->width, info->var.xres) || ...

	Ali