linux-kernel - Re: [PATCH 3/3] OLPC: gxfb/lxfb: add DCON panel modes to framebuffer drivers

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Message-Id: <20080414182112.848bcb64.akpm@linux-foundation.org>
Date:	Mon, 14 Apr 2008 18:21:12 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Andres Salomon <dilinger@...ued.net>
Cc:	linux-kernel@...r.kernel.org, info-linux@...de.amd.com,
	jordan.crouse@....com, adaplas@...il.com,
	linux-fbdev-devel@...ts.sourceforge.net
Subject: Re: [PATCH 3/3] OLPC: gxfb/lxfb: add DCON panel modes to
 framebuffer drivers

On Mon, 14 Apr 2008 03:53:02 -0400 Andres Salomon <dilinger@...ued.net> wrote:

> 
> Since there's no way to autodetect panel modes, we're forced to hardcode
> them in the driver and add a big fat #ifdef.  The OLPC DCON needs a
> specific mode line (at 1200x900).  This adds it to both gxfb and lxfb.
> 
> ...
>
> +static const struct fb_videomode gx_dcon_modedb[] __initdata = {
> +const struct fb_videomode olpc_dcon_modedb[] __initdata = {

include/linux/init.h:38 points out that `const' and `__initdata' should
not be mixed.

I forget which architecture/compiler versions explode when we do this.  But
it's not x86, iirc.

Still, it's poor form and, err, I don't immediately recall which tag we
_should_ use, and the comments in there are unhelpful.  It might be
__initconst, but that has exactly zero users.  Help.

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