linux-kernel - Re: [PATCHv2] x86: Use v8086_mode helper, trivial unification

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Date:	Fri, 18 Jan 2008 16:00:40 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Harvey Harrison <harvey.harrison@...il.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCHv2] x86: Use v8086_mode helper, trivial unification


> > +	/*
> > +	 * Did it hit the DOS screen memory VA from vm86 mode?
> > +	 */
> > +	if (v8086_mode(regs)) {
> > +		unsigned long bit = (address - 0xA0000) >> PAGE_SHIFT;
> > +		if (bit < 32)
> > +			tsk->thread.screen_bitmap |= 1 << bit;
> > +	}

this does not build on 64-bit, because screen_bitmap is 32-bit only - so 
i had to pull the patch. I suspect a small #ifdef section would look 
better here?

	Ingo
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