[U-Boot] [PATCH] ARM: uniphier: drop UniPhier specific SMP code

[Masahiro Yamada]

2015-11-06 22:46 GMT+09:00 Tom Rini <trini at konsulko.com>:
> On Fri, Nov 06, 2015 at 10:16:30PM +0900, Masahiro Yamada wrote:
>
>> The latest Linux can directly handle SMP operations for UniPhier SoCs
>> without any help of U-boot.  Drop the relevant code from U-boot.
>>
>> See commit b1e4006aeda8c8784029de17d47987c21ea75f6d ("ARM: uniphier:
>> rework SMP operations to use trampoline code") in Linux Kernel.
>>
>> Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
>
> So my question for you is how much of a concern is running older kernels
> and newer U-Boots on these platforms?  I know that for example we
> couldn't do something like that in "beagle" land, and for Allwinner
> platforms we still have ways of making the older but most featureful
> kernels work.


Good question.

Socionext (and my former company, Panasonic) tended to
modify source code locally (ugly hacks here and there) and never tried
to push patches to the upstream.

I started the kernel upstreaming this year,
and the company changed the mind and stared to realize its importance,
but it is under way.

The mainline kernel requires some more extra patches that have not
been upstreamed yet.

So, our customers cannot do anything with the mainline kernel alone.
They are supposed to use software stacks released from us.

So, the combination of the older kernels + newer U-boot does not matter.
The older kernels were not working in the first place.


-- 
Best Regards
Masahiro Yamada