linux-kernel - Re: [PATCH] x86/entry/32: Initialize ss1 (SYSENTER

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Message-ID: <CALCETrVtk33CCo7+Sa=Ak_DJ2+HMuGoj=iNFGP=0Bvz1d-4waw@mail.gmail.com>
Date:	Thu, 23 Jul 2015 12:12:04 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	Brian Gerst <brgerst@...il.com>
Cc:	Andy Lutomirski <luto@...nel.org>, X86 ML <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>, Willy Tarreau <w@....eu>,
	Borislav Petkov <bp@...en8.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] x86/entry/32: Initialize ss1 (SYSENTER_CS shadow) even on
 non-SEP CPUs

On Thu, Jul 23, 2015 at 12:03 PM, Brian Gerst <brgerst@...il.com> wrote:
> On Thu, Jul 23, 2015 at 2:56 PM, Andy Lutomirski <luto@...nel.org> wrote:
>> native_load_sp0 relies on this.  I'm not sure why we haven't seen
>> reports of crashes.  Maybe no one tests new kernels on non-SEP CPUs.
>
> It's already statically initialized in cpu_tss.

Indeed.  I'll just delete it, then.

>
> --
> Brian Gerst



-- 
Andy Lutomirski
AMA Capital Management, LLC
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