linux-kernel - Re: CONFIG_X86_ES7000=y, CONFIG_X86_GENERICARCH=n, CONFIG

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Message-ID: <20070615152938.GA9230@in.ibm.com>
Date:	Fri, 15 Jun 2007 20:59:38 +0530
From:	Vivek Goyal <vgoyal@...ibm.com>
To:	Natalie Protasevich <protasnb@...il.com>
Cc:	linux-kernel@...r.kernel.org, rdreier@...co.com,
	akpm@...ux-foundation.org
Subject: Re: CONFIG_X86_ES7000=y, CONFIG_X86_GENERICARCH=n, CONFIG_ACPI=y build broken

On Wed, Jun 13, 2007 at 03:22:55PM -0700, Natalie Protasevich wrote:
[..]
> >Seems it would be cleaner to figure out some way to build es7000.c for
> >if CONFIG_X86_ES7000 is set?  Or just move them here all the time?
> >
> > > ---
> >linux-2.6.22-rc4-git4/include/asm-i386/mach-es7000/mach_mpparse.h~i386-e
> >s7000-build-breakage-fix        2007-06-13 22:52:14.000000000 +0530
> > > +++
> >linux-2.6.22-rc4-git4-vivek/include/asm-i386/mach-es7000/mach_mpparse.h
> >2007-06-13 22:52:14.000000000 +0530
> > > @@ -18,6 +18,12 @@ extern int parse_unisys_oem (char *oempt
> > >  extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
> > >  extern void setup_unisys(void);
> > >
> > > +#ifndef CONFIG_X86_GENERICARCH
> > > +extern int acpi_madt_oem_check(char *oem_id, char *oem_table_id);
> > > +extern int mps_oem_check(struct mp_config_table *mpc, char *oem,
> > > +                            char *productid);
> > > +#endif
> >
> >It seems that this #ifndef is not needed -- even if there is another
> >declaration of these functions that is visible, the signatures should
> >match so it should be OK.
> 
> I just finished my test builds with and without GENERIC, so I can
> suggest just move all functions to arch/i386/mach-es7000/es7000plat.c
> - es7000_sw_apic() ,es7000_enable_apic_mode(),acpi_madt_oem_check(),
> mps_oem_check() and make them non-static - from
> arch/i386/mach-generic/es7000.c

I think this will also break with CONFIG_X86_GENERIC=y. The moment you
make es7000 specific acpi_madt_oem_check() non static, It will conflict
with generic definition present in mach-generic/probe.c. That function is
a generic function designed to probe for underlying subarch.

Thanks
Vivek

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