linux-kernel - Re: [PATCH 5/8] x86: apic - unify hard_smp_processor

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Date:	Sat, 23 Aug 2008 12:13:21 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Cyrill Gorcunov" <gorcunov@...il.com>
Cc:	mingo@...e.hu, macro@...ux-mips.org, hpa@...or.com,
	tglx@...utronix.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/8] x86: apic - unify hard_smp_processor_id

On Sat, Aug 23, 2008 at 6:01 AM, Cyrill Gorcunov <gorcunov@...il.com> wrote:
> Move hard_smp_processor_id to apic_32.c.
> There is no need to keep it in header - we are linked to
> apic_xx.c code anyway.
>
> Signed-off-by: Cyrill Gorcunov <gorcunov@...il.com>
> ---
>  arch/x86/kernel/apic_32.c |    5 +++++
>  include/asm-x86/smp.h     |   10 ----------
>  2 files changed, 5 insertions(+), 10 deletions(-)
>
> diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c
> index ad295cf..c71a77c 100644
> --- a/arch/x86/kernel/apic_32.c
> +++ b/arch/x86/kernel/apic_32.c
> @@ -1569,6 +1569,11 @@ void __cpuinit generic_processor_info(int apicid, int version)
>        cpu_set(cpu, cpu_present_map);
>  }
>
> +int hard_smp_processor_id(void)
> +{
> +       return read_apic_id();
> +}
> +
>  /*
>  * Power management
>  */
> diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h
> index 29324c1..914a73d 100644
> --- a/include/asm-x86/smp.h
> +++ b/include/asm-x86/smp.h
> @@ -185,17 +185,7 @@ static inline unsigned int read_apic_id(void)
>  }
>  #endif
>
> -
> -# if defined(APIC_DEFINITION) || defined(CONFIG_X86_64)
>  extern int hard_smp_processor_id(void);
> -# else
> -#include <mach_apicdef.h>
> -static inline int hard_smp_processor_id(void)
> -{
> -       /* we don't want to mark this access volatile - bad code generation */
> -       return read_apic_id();
> -}
> -# endif /* APIC_DEFINITION */
>
>  #else /* CONFIG_X86_LOCAL_APIC */
>
> --
> 1.6.0.6.gc667
>
>

this one seems have some problem with 32bit with genericarch

because we have

int hard_smp_processor_id(void)
{
        return genapic->get_apic_id(*(unsigned long *)(APIC_BASE+APIC_ID));
}

arch/x86/mach-generic/probe.c

updated 64 bit to have MACRO.

YH
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