linux-kernel - Re: [PATCH V2] x86: Allow built-in command line to work in early kernel init

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Message-ID: <5552BAF3.7040605@zytor.com>
Date:	Tue, 12 May 2015 19:46:11 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>,
	Yinghai Lu <yinghai@...nel.org>
CC:	Matthew Garrett <matthew.garrett@...eos.com>,
	Ingo Molnar <mingo@...nel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Matthew Garrett <mjg59@...eos.com>
Subject: Re: [PATCH V2] x86: Allow built-in command line to work in early
 kernel init

On 05/12/2015 04:53 PM, Matthew Garrett wrote:
> On Tue, May 12, 2015 at 04:41:22PM -0700, Yinghai Lu wrote:
> 
>> You can not assume that you can use buffer after cmd_line from bootloader
>> blindly.
> 
> Are there any bootloaders that don't allocate a buffer of the maximum 
> command line size?
> 

YES!  In fact, it is quite common for the command line to be dynamically
allocated.

	-hpa

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