linux-kernel - Re: [PATCH 1/9] dt: Handle passed/built-in DT selection in early_init_dt

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Date:	Wed, 27 Nov 2013 15:35:35 +0000
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Rob Herring <robherring2@...il.com>
Cc:	Rob Herring <rob.herring@...xeda.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Linux-Arch <linux-arch@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/9] dt: Handle passed/built-in DT selection in early_init_dt_scan()

On Thu, 21 Nov 2013 18:42:58 +0100, Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> On Thu, Nov 21, 2013 at 6:38 PM, Rob Herring <robherring2@...il.com> wrote:
> > I really don't like saying one arch can have built-in dtb and another
> > one can't. Either we allow it or we don't. If this is a bad feature,
> > then why did we let multiple arches implement it.
> 
> ... and did we put it in asm-generic, so now _every_ arch has __dtb_start.
> 
> Gr{oetje,eeting}s,

Some platforms need it because they either don't have bootloader
support, they couldn't change the boot interface, or they don't have a
bootwrapper they can put it in. I'd rather have it in common code than a
different implementation on each architecture.

For the copy flag, it would be fine to put an "if (IS_CONFIGURED())"
test around the copy block so that it never happens on some
architectures.

g.

> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds

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