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Date: Fri, 26 Apr 2013 13:19:54 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Kyungsik Lee <kyungsik.lee@lge.com>
CC: Andrew Morton <akpm@linux-foundation.org>, Rob Landley <rob@landley.net>,
        linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-kbuild@vger.kernel.org, x86@kernel.org,
        celinux-dev@lists.celinuxforum.org, hyojun.im@lge.com,
        chan.jeong@lge.com, raphael.andy.lee@gmail.com,
        Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
        Russell King <rmk@arm.linux.org.uk>, Borislav Petkov <bp@alien8.de>,
        Florian Fainelli <florian@openwrt.org>,
        Yann Collet <yann.collet.73@gmail.com>
Subject: Re: [PATCH -next] x86, doc: Add LZ4 magic number for the new compression
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On 04/25/2013 10:08 PM, Kyungsik Lee wrote:
> Documentation/x86/boot.txt is updated to list the LZ4 magic number.
> This LZ4 magic number is used for the new compression format.
> 
> Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com>
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> Cc: Ingo Molnar <mingo@elte.hu>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Russell King <rmk@arm.linux.org.uk>
> Cc: Borislav Petkov <bp@alien8.de>
> Cc: Florian Fainelli <florian@openwrt.org>
> Cc: Yann Collet <yann.collet.73@gmail.com>
> ---
>  Documentation/x86/boot.txt | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/x86/boot.txt b/Documentation/x86/boot.txt
> index 3840b6f..fc66d42 100644
> --- a/Documentation/x86/boot.txt
> +++ b/Documentation/x86/boot.txt
> @@ -657,9 +657,10 @@ Protocol:	2.08+
>    uncompressed data should be determined using the standard magic
>    numbers.  The currently supported compression formats are gzip
>    (magic numbers 1F 8B or 1F 9E), bzip2 (magic number 42 5A), LZMA
> -  (magic number 5D 00), and XZ (magic number FD 37).  The uncompressed
> -  payload is currently always ELF (magic number 7F 45 4C 46).
> -  
> +  (magic number 5D 00), XZ (magic number FD 37), and LZ4 (magic number
> +  02 21).  The uncompressed payload is currently always ELF (magic
> +  number 7F 45 4C 46).
> +
>  Field name:	payload_length
>  Type:		read
>  Offset/size:	0x24c/4
> 

Acked-by: H. Peter Anvin <hpa@linux.intel.com>