linux-kernel - Re: Build regressions/improvements in v4.6-rc5

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Date:	Wed, 27 Apr 2016 21:04:35 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: Build regressions/improvements in v4.6-rc5

On Mon, Apr 25, 2016 at 10:18:39AM +0200, Geert Uytterhoeven wrote:
> On Mon, Apr 25, 2016 at 10:15 AM, Geert Uytterhoeven
> <geert@...ux-m68k.org> wrote:
> > JFYI, when comparing v4.6-rc5[1] to v4.6-rc4[3], the summaries are:
> >   - build errors: +15/-5
> 
>   + /home/kisskb/slave/src/arch/arm/mach-sa1100/assabet.c: error:
> 'PMD_MASK' undeclared (first use in this function):  => 496:38
>   + /home/kisskb/slave/src/arch/arm/mach-sa1100/assabet.c: error:
> 'pmdval_t' undeclared (first use in this function):  => 498:13
>   + /home/kisskb/slave/src/arch/arm/mach-sa1100/assabet.c: error:
> implicit declaration of function 'flush_pmd_entry'
> [-Werror=implicit-function-declaration]:  => 503:2

Looks like nommu stuff, as I know assabet builds with my mmu-full
configuration.

>   + /home/kisskb/slave/src/arch/arm/mm/copypage-v4mc.c: error:
> 'COPYPAGE_MINICACHE' undeclared (first use in this function):  =>
> 77:14
>   + /home/kisskb/slave/src/arch/arm/mm/copypage-v4mc.c: error:
> 'L_PTE_MT_MINICACHE' undeclared (first use in this function):  =>
> 77:47
>   + /home/kisskb/slave/src/arch/arm/mm/copypage-v4mc.c: error:
> 'L_PTE_PRESENT' undeclared (first use in this function):  => 77:47
>   + /home/kisskb/slave/src/arch/arm/mm/copypage-v4mc.c: error:
> 'L_PTE_YOUNG' undeclared (first use in this function):  => 77:47
>   + /home/kisskb/slave/src/arch/arm/mm/copypage-v4mc.c: error:
> implicit declaration of function '__flush_dcache_page'
> [-Werror=implicit-function-declaration]:  => 73:3
>   + /home/kisskb/slave/src/arch/arm/mm/copypage-v4mc.c: error:
> implicit declaration of function 'mk_pte'
> [-Werror=implicit-function-declaration]:  => 77:2
>   + /home/kisskb/slave/src/arch/arm/mm/copypage-v4mc.c: error:
> implicit declaration of function 'set_top_pte'
> [-Werror=implicit-function-declaration]:  => 77:2
>   + /home/kisskb/slave/src/arch/arm/mm/copypage-v4mc.c: error: unknown
> field 'cpu_clear_user_highpage' specified in initializer:  => 113:2
>   + /home/kisskb/slave/src/arch/arm/mm/copypage-v4mc.c: error: unknown
> field 'cpu_copy_user_highpage' specified in initializer:  => 114:2
>   + /home/kisskb/slave/src/arch/arm/mm/copypage-v4mc.c: error:
> variable 'v4_mc_user_fns' has initializer but incomplete type:  =>
> 112:8

My guess is that it (and other copypage-* headers) need to include
asm/page.h, but maybe this is another nommu problem, I don't know.
I don't have time to analyse these as I'm still catching up with
email, and will be for a while yet.

-- 
RMK's Patch system: http://www.arm.linux.org.uk/developer/patches/
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