linux-kernel - Re: [PATCH 03/12] SFI: document boot param "sfi=off"

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Message-Id: <200907281324.03237.bjorn.helgaas@hp.com>
Date:	Tue, 28 Jul 2009 13:24:02 -0600
From:	Bjorn Helgaas <bjorn.helgaas@...com>
To:	Len Brown <lenb@...nel.org>
Cc:	x86@...nel.org, sfi-devel@...plefirmware.org,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	Feng Tang <feng.tang@...el.com>,
	Len Brown <len.brown@...el.com>
Subject: Re: [PATCH 03/12] SFI: document boot param "sfi=off"

On Tuesday 07 July 2009 10:13:49 pm Len Brown wrote:
> From: Feng Tang <feng.tang@...el.com>
> 
> "sfi=off" is analogous to "acpi=off"
> 
> In practice, "sfi=off" isn't likely to be very useful, for
> 1. SFI is used only when ACPI is not available
> 2. Today's SFI systems are not legacy PC-compatible
> 
> ie. "sfi=off" on an ACPI-platform is a NO-OP,
> and "sfi=off" on an SFI-platform will likely result in boot failure.
> 
> Signed-off-by: Feng Tang <feng.tang@...el.com>
> Signed-off-by: Len Brown <len.brown@...el.com>
> ---
>  Documentation/kernel-parameters.txt |    5 +++++
>  1 files changed, 5 insertions(+), 0 deletions(-)

I think the documentation update should be part of the patch
that changes the functionality, so the doc always matches the
code.

Bjorn

> diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> index d77fbd8..68337e6 100644
> --- a/Documentation/kernel-parameters.txt
> +++ b/Documentation/kernel-parameters.txt
> @@ -92,6 +92,7 @@ parameter is applicable:
>  	SECURITY Different security models are enabled.
>  	SELINUX SELinux support is enabled.
>  	SERIAL	Serial support is enabled.
> +	SFI	Simple Firmware Interface
>  	SH	SuperH architecture is enabled.
>  	SMP	The kernel is an SMP kernel.
>  	SPARC	Sparc architecture is enabled.
> @@ -2162,6 +2163,10 @@ and is between 256 and 4096 characters. It is defined in the file
>  			If enabled at boot time, /selinux/disable can be used
>  			later to disable prior to initial policy load.
>  
> +	sfi=		[SFI,X86] Simple Firmware Interface
> +			Format: { "off" }
> +			off -- disable SFI
> +
>  	serialnumber	[BUGS=X86-32]
>  
>  	shapers=	[NET]


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