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Date: Fri, 20 Feb 2009 13:54:05 -0800
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Subject: Re: state of some x86 acpi patches
From: Tony Luck <tony.luck@intel.com>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>, Jeremy Fitzhardinge <jeremy@goop.org>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
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On Sun, Feb 15, 2009 at 3:10 PM, Yinghai Lu <yinghai@kernel.org> wrote:
> Index: linux-2.6/arch/ia64/kernel/acpi.c
> ===================================================================
> --- linux-2.6.orig/arch/ia64/kernel/acpi.c
> +++ linux-2.6/arch/ia64/kernel/acpi.c
> @@ -199,7 +199,7 @@ char *__init __acpi_map_table(unsigned l
>        return __va(phys_addr);
>  }
>
> -char *__init __acpi_unmap_table(unsigned long virt_addr, unsigned long size)
> +void __init __acpi_unmap_table(char *map, unsigned long size)
>  {
>  }

I'm seeing some section mismatch warnings for this function (when building
linux-next tag: next-20090220) as it is called by some non __init functions:

WARNING: vmlinux.o(.text+0x498912): Section mismatch in reference from
the function early_acpi_os_unmap_memory() to the function
.init.text:__acpi_unmap_table()

WARNING: vmlinux.o(.text+0x4989a2): Section mismatch in reference from
the function acpi_os_unmap_memory() to the function
.init.text:__acpi_unmap_table()

Simplest solution would seem to be dropping the "__init" (since the
function is empty, it won't bloat the kernel by much if we don't manage
to free up the memory - just 32 bytes :-)

-Tony