linux-kernel - Re: [PATCH 1/2] Use structs instead of hardcoded offsets in x86 boot decompressor.

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Message-ID: <20080523210744.52fe7fde@bree.surriel.com>
Date:	Fri, 23 May 2008 21:07:44 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Kristian Høgsberg <krh@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	Kristian Høgsberg <krh@...hat.com>
Subject: Re: [PATCH 1/2] Use structs instead of hardcoded offsets in x86
 boot decompressor.

On Fri, 23 May 2008 17:59:27 -0400
Kristian Høgsberg <krh@...hat.com> wrote:

> Signed-off-by: Kristian Høgsberg <krh@...hat.com>

Acked-by: Rik van Riel <riel@...hat.com>


> +static struct boot_params *real_mode;		/* Pointer to real-mode data */
> +static struct screen_info *rm_screen_info;	/* Pointer to real-mode data */

People who wonder why these pointers never get initialized: they
point to the zeropage, which of course lives at address zero.

/* The so-called "zeropage" */
struct boot_params {
	struct screen_info screen_info;                 /* 0x000 */
        struct apm_bios_info apm_bios_info;             /* 0x040 */
        __u8  _pad2[12];                                /* 0x054 */
        struct ist_info ist_info;                       /* 0x060 */
	...

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