linux-kernel - Re: [PATCH] Add TAINT_FIRMWARE

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Message-ID: <alpine.DEB.2.00.1110181637400.8149@chino.kir.corp.google.com>
Date:	Tue, 18 Oct 2011 16:41:27 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Prarit Bhargava <prarit@...hat.com>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
cc:	linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH] Add TAINT_FIRMWARE_WORKAROUND on MTRR fixup

On Tue, 18 Oct 2011, Prarit Bhargava wrote:

> TAINT_FIRMWARE_WORKAROUND should be set when an MTRR fixup is done.
> 
> Signed-off-by: Prarit Bhargava <prarit@...hat.com>
> Cc: x86@...nel.org

Acked-by: David Rientjes <rientjes@...gle.com>

Adding the x86 maintainers to the cc, not sure if x86@...nel.org is 
silently failing (or is it just an alias to them that is already back up 
working)?

> ---
>  arch/x86/kernel/cpu/mtrr/generic.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c
> index a71efcd..e1fe7f4 100644
> --- a/arch/x86/kernel/cpu/mtrr/generic.c
> +++ b/arch/x86/kernel/cpu/mtrr/generic.c
> @@ -547,6 +547,7 @@ static void generic_get_mtrr(unsigned int reg, unsigned long *base,
>  
>  		if (tmp != mask_lo) {
>  			printk(KERN_WARNING "mtrr: your BIOS has configured an incorrect mask, fixing it.\n");
> +			add_taint(TAINT_FIRMWARE_WORKAROUND);
>  			mask_lo = tmp;
>  		}
>  	}
--
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