linux-kernel - Re: [PATCH 2/8] drm/udl: Change drm_fb_helper_sys_*() calls to sys

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 21 Apr 2016 09:28:47 +0200
From:	Daniel Vetter <daniel@...ll.ch>
To:	Noralf Trønnes <noralf@...nnes.org>
Cc:	dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
	laurent.pinchart@...asonboard.com, tomi.valkeinen@...com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/8] drm/udl: Change drm_fb_helper_sys_*() calls to
 sys_*()

On Wed, Apr 20, 2016 at 08:15:30PM +0200, Noralf Trønnes wrote:
> 
> Den 20.04.2016 19:42, skrev Daniel Vetter:
> >On Wed, Apr 20, 2016 at 05:25:23PM +0200, Noralf Trønnes wrote:
> >>Now that drm_fb_helper gets deferred io support, the
> >>drm_fb_helper_sys_{fillrect,copyarea,imageblit} functions will schedule
> >>the worker that calls the deferred_io callback. This will break this
> >>driver so use the sys_{fillrect,copyarea,imageblit} functions directly.
> >>
> >>Signed-off-by: Noralf Trønnes <noralf@...nnes.org>
> >I think this intermediately breaks the build, if you disable fbdev
> >support. That's now supported in the fbdev helpers core generically across
> >all drivers.
> >
> >Not sure how to best fix this up, since the only way would be to squash
> >these patches, plus generic deferred io plus the conversion patches for
> >udl/qxl all into one. Tricky.
> 
> Yes you're right, I missed that.
> How about this:
> #ifdef CONFIG_FB
>         sys_fillrect(info, rect);
> #endif
> 
> The later patch will then remove this ugliness...

Yeah I think we have to bite the bullet and take this temporary ugliness
:(

-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch