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Date: Fri, 11 Apr 2014 11:29:27 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Brian Gerst <brgerst@gmail.com>, Ingo Molnar <mingo@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>, stable@vger.kernel.org,
	"H. Peter Anvin" <hpa@linux.intel.com>
Subject: Re: [tip:x86/urgent] x86-64, modify_ldt: Ban 16-bit segments on 64-bit
 kernels
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On 04/11/2014 11:27 AM, Brian Gerst wrote:
> Is this bug really still present in modern CPUs?  This change breaks
> running 16-bit apps in Wine.  I have a few really old games I like to
> play on occasion, and I don't have a copy of Win 3.11 to put in a VM.

It is not a bug, per se, but an architectural definition issue, and it
is present in all x86 processors from all vendors.

Yes, it does break running 16-bit apps in Wine, although Wine could be
modified to put 16-bit apps in a container.  However, this is at best a
marginal use case.

	-hpa