linux-kernel - Re: Build regressions/improvements in v4.7-rc1

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Date:	Wed, 1 Jun 2016 18:28:09 -0400
From:	Rich Felker <dalias@...c.org>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-sh list <linux-sh@...r.kernel.org>
Subject: Re: Build regressions/improvements in v4.7-rc1

On Wed, Jun 01, 2016 at 06:18:02PM -0400, Rich Felker wrote:
> On Mon, May 30, 2016 at 09:34:07AM +0200, Geert Uytterhoeven wrote:
> > >   + /home/kisskb/slave/src/arch/sh/kernel/setup.c: error: implicit declaration of function 'early_init_dt_scan' [-Werror=implicit-function-declaration]:  => 256:2
> > 
> > sh-randconfig
> 
> Nice find. I think I'm incorrectly checking for CONFIG_OF in places
> that should actually be checking for CONFIG_OF_FLATTREE. Does that
> look right to you? Nothing breaks in actual configurations that make
> sense now, only if you enable OF manually without selecting
> SH_DEVICE_TREE as your board.
> 
> If you can confirm that my assessment is correct I'll include a fix in
> my (now-late) pull request.

BTW it seems a bigger version of the same issue affects my J2 support
patch series: CONFIG_CPU_J2 enables code that performs an early FDT
scan to obtain cache information, so it needs to select OF and
OF_FLATTREE to avoid build errors. Eventually none of this will matter
once we drop legacy support and make it so SUPERH implies OF and
OF_EARLY_FLATTREE.

Rich