linux-kernel - Re: [PATCH] - Earlier detection of system type (UV or non-UV)

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Date:	Fri, 18 Jul 2008 19:49:29 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jack Steiner <steiner@....com>
Cc:	tglx@...utronix.de, linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] - Earlier detection of system type (UV or non-UV)


* Ingo Molnar <mingo@...e.hu> wrote:

> 
> * Jack Steiner <steiner@....com> wrote:
> 
> > A patch is coming that requires earlier detection of system type (UV 
> > or non-UV) Move the logic that detects whether running on UV to 
> > acpi_boot_table_init().
> 
> > ===================================================================
> > --- linux.orig/arch/x86/kernel/acpi/boot.c	2008-07-09 11:14:03.000000000 -0500
> > +++ linux/arch/x86/kernel/acpi/boot.c	2008-07-09 11:14:33.000000000 -0500
> > @@ -1712,6 +1712,10 @@ int __init acpi_boot_table_init(void)
> >  		return error;
> >  	}
> >  
> > +#ifdef CONFIG_X86_64
> > +	acpi_table_parse(ACPI_SIG_MADT, acpi_early_madt_oem_check);
> > +#endif
> > +
> >  	acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);
> 
> why the assymetry? We should parse it regardless of 32-bit or 64-bit. 
> (even if UV is 64-bit only, obviously)

also, it doesnt build with the attached config:

arch/x86/kernel/genapic_64.c: In function ‘acpi_early_madt_oem_check':
arch/x86/kernel/genapic_64.c:71: error: dereferencing pointer to 
incomplete type

	Ingo

View attachment "config" of type "text/plain" (31107 bytes)