linux-kernel - Re: [PATCH] x86: relocate_kernel - use predefined PAGE

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Message-ID: <20080321204106.GB9424@cvg>
Date:	Fri, 21 Mar 2008 23:41:06 +0300
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: relocate_kernel - use predefined PAGE_SIZE
	instead of own alias

[H. Peter Anvin - Fri, Mar 21, 2008 at 01:18:13PM -0700]
> Cyrill Gorcunov wrote:
>> This patch does clean up relocate_kernel_(32|64).S a bit by getting rid
>> of local PAGE_ALIGNED macro. We should use well-known PAGE_SIZE instead
>> Signed-off-by: Cyrill Gorcunov <gorcunov@...il.com>
>
> Looks good!
>
> 	-hpa
>

Thanks Peter for review, btw we have in relocate_kernel_32.S

188:	movl	%cr4, %eax
189:	andl	$0, %eax
190:	movl	%eax, %cr4

but maybe would be better just replace it with

	xorl	%eax, %eax
	movl	%eax, %cr4

or there is some nonobvious reason not to do so?

		- Cyrill -
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