linux-kernel - Re: [PATCH] Fix section mismatch error for acpi_early_processor_set

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Message-ID: <20100106225212.GF19218@ldl.fc.hp.com>
Date:	Wed, 6 Jan 2010 15:52:12 -0700
From:	Alex Chiang <achiang@...com>
To:	"Luck, Tony" <tony.luck@...el.com>
Cc:	Len Brown <len.brown@...el.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix section mismatch error for
	acpi_early_processor_set_pdc()

* Luck, Tony <tony.luck@...el.com>:
> Alex Chiang introduced acpi_early_processor_set_pdc() in commit:
>  ACPI: processor: call _PDC early
>  78f1699659963fff97975df44db6d5dbe7218e55
> 
> But this results in a section mismatch:
> 
> WARNING: drivers/acpi/acpi.o(.text+0xa9c1): Section mismatch in reference from the
> function acpi_early_processor_set_pdc() to the variable .cpuinit.data:processor_idle_dmi_table
> The function acpi_early_processor_set_pdc() references
> the variable __cpuinitdata processor_idle_dmi_table.
> This is often because acpi_early_processor_set_pdc lacks a __cpuinitdata
> annotation or the annotation of processor_idle_dmi_table is wrong.
> 
> The only caller of acpi_early_processor_set_pdc() is acpi_bus_init() which
> is an "__init" function. So the correct fix here is to mark
> acpi_early_processor_set_pdc() "__init" too.
> 
> Signed-off-by: Tony Luck <tony.luck@...el.com>

Acked-by: Alex Chiang <achiang@...com>

Sorry for not catching this. Not sure why I didn't notice it
myself.

/ac

> 
> ---
> 
> diff --git a/drivers/acpi/processor_pdc.c b/drivers/acpi/processor_pdc.c
> index 30e4dc0..7d4ee39 100644
> --- a/drivers/acpi/processor_pdc.c
> +++ b/drivers/acpi/processor_pdc.c
> @@ -151,7 +151,7 @@ early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv)
>  	return AE_OK;
>  }
>  
> -void acpi_early_processor_set_pdc(void)
> +void __init acpi_early_processor_set_pdc(void)
>  {
>  	/*
>  	 * Check whether the system is DMI table. If yes, OSPM
> 
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