[RFC PATCH] arm/arm64: build all dtbs for CONPILE_TEST

[Geert Uytterhoeven]

Hi Rob,

On Thu, Aug 27, 2015 at 9:07 PM, Rob Herring <robh at kernel.org> wrote:
>> It would be useful to build all files, but it's not the behavior that
>> COMPILE_TEST usually has.
>
> Just changing to dtb-n would be equivalent because there is no other
> dependency to enable building. Code has other dependencies typically.
> What dtb do we not want to built in an allyesconfig build? If dtb's
> have any dependencies, that would be a bug. To really make this
> equivalent to a driver using COMPILE_TEST, we would need kconfig
> symbols specifically for each platform's dtbs. Then we would have the
> 2 stage unhide (setting COMPILE_TEST) then enable the option.
>
> I was also thinking that perhaps we don't want to require a kconfig
> symbol for every platform family. Adding a kconfig entry is the only
> way to enable building a dtb ATM. I know there are 2 camps to this
> policy though.

I think it would be good to have a single Kconfig option (depending on
COMPILE_TEST) to build all dtbs.

For drivers, COMPILE_TEST doesn't enable anything by itself, it just
relaxes dependencies. Hence if any driver is broken, I can still
disable that driver in the .config.

If any dtb is broken, I cannot disable it, except by disabling COMPILE_TEST,
which I may not want to do for other reasons (e.g. I'm compile testing my
driver). If there would be an extra Kconfig symbol for building all dtbs,
I can still disable it.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-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