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

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Message-ID: <20150513030640.GA4675@srcf.ucam.org>
Date:	Wed, 13 May 2015 04:06:40 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	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 Tue, May 12, 2015 at 07:46:11PM -0700, H. Peter Anvin wrote:
> 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.

Hmm. Well, this is a little awkward. Let me think about it.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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