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Date: Sun, 17 Feb 2008 23:15:54 +0300
From: Cyrill Gorcunov <gorcunov@gmail.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Sam Ravnborg <sam@ravnborg.org>, ak@suse.de, mingo@elte.hu,
       tglx@linutronix.de, linux-kernel@vger.kernel.org
Subject: Re: [patch 2/2] x86: lds - Use THREAD_SIZE instead of numeric
	constant
Message-ID: <20080217201554.GG31968@cvg>
References: <20080217151716.274134094@gmail.com> <20080217151925.402628615@gmail.com> <20080217185936.GB14588@uranus.ravnborg.org> <20080217190801.GC31968@cvg> <47B88FAA.9080603@zytor.com> <20080217200654.GF31968@cvg> <47B89501.5090108@zytor.com>
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[H. Peter Anvin - Sun, Feb 17, 2008 at 12:11:45PM -0800]
> Cyrill Gorcunov wrote:
>> Thanks Peter for comments. Peter could you clarify for me a bit
>> more on the string:
>> x86/kernel/head_32.S:339
>> 	/* Set up the stack pointer */
>> 	lss stack_start,%esp
>> but stack_start is defined as head_32.S:647
>> .data
>> ENTRY(stack_start)
>> 	.long init_thread_union+THREAD_SIZE
>> so stack_start *must* be aligned with THREAD_SIZE in vmlinux.lds
>> at compiling time. There is no PDA at this booting time. Am I wrong?
>> If you're too busy - just reply me like "Read the code" ;)
>
> That doesn't follow.
>
> You're saying that it *must* be aligned, I don't think that's true anymore; 
> I think nowadays it's more accurate to say that it *is* aligned, but I 
> don't think that's fundamental.
>
> 	-hpa
>

Thanks a lot, Peter.

		- Cyrill -
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