linux-kernel - Re: [PATCH] microcode: Fix mc_cpu

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Message-ID: <Pine.LNX.4.61.0612180954380.3848@ws.homenet>
Date:	Mon, 18 Dec 2006 10:04:39 +0000 (GMT)
From:	Tigran Aivazian <tigran@...azian.fsnet.co.uk>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] microcode: Fix mc_cpu_notifier section warning

Hi Jean,

Ok, your patch is correct, although I assume you realize that it does 
nothing --- both the function and the data it operates on are inside 
CONFIG_HOTPLUG_CPU and checking include/linux/init.h I see that 
__cpuinitdata is nothing in this case. E.g. msr_class_cpu_notifier in the 
msr driver isn't declared __cpuinitdata...

But to tidy up one should add __cpuinitdata as you suggest (to guard for 
the case if these two slip out of CONFIG_HOTPLUG_CPU, although they are 
meaningless if cpu hotplug support is not configured in).

Kind regards
Tigran

On Sun, 17 Dec 2006, Jean Delvare wrote:

> Structure mc_cpu_notifier references a __cpuinit function, but
> isn't declared __cpuinitdata itself:
>
> WARNING: arch/i386/kernel/microcode.o - Section mismatch: reference
> to .init.text: from .data after 'mc_cpu_notifier' (at offset 0x118)
>
> Signed-off-by: Jean Delvare <khali@...ux-fr.org>
> ---
> arch/i386/kernel/microcode.c |    2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> --- linux-2.6.20-rc1.orig/arch/i386/kernel/microcode.c	2006-12-15 09:05:20.000000000 +0100
> +++ linux-2.6.20-rc1/arch/i386/kernel/microcode.c	2006-12-17 15:23:40.000000000 +0100
> @@ -722,7 +722,7 @@
> 	return NOTIFY_OK;
> }
>
> -static struct notifier_block mc_cpu_notifier = {
> +static struct notifier_block __cpuinitdata mc_cpu_notifier = {
> 	.notifier_call = mc_cpu_callback,
> };
>
>
>
> -- 
> Jean Delvare
>
-
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