linux-kernel - Re: [PATCH] x86: Use v8086_mode helper, trivial unification

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Message-ID: <479002B6.9030607@zytor.com>
Date:	Thu, 17 Jan 2008 20:36:54 -0500
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Roland McGrath <roland@...hat.com>
CC:	Harvey Harrison <harvey.harrison@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] x86: Use v8086_mode helper, trivial unification

Roland McGrath wrote:
> It's indeed true that &pt_regs is truly the esp value for x86-32
> kernel-mode trap frames.  Because this nonobvious calculation is 
> only right for a kernel mode pt_regs and not for a user-mode one,
> I think it would be better to use a name for the inline/macro that
> makes this quite clear, rather than one so generic as "stack_addr".

Indeed.  This was certainly highly nonobvious in the current code.

	-hpa

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