linux-kernel - Re: [PATCH] x86/fpu: Simplify fpu__activate_fpstate

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Message-ID: <20170923182833.GA542@zzz.localdomain>
Date:   Sat, 23 Sep 2017 11:28:33 -0700
From:   Eric Biggers <ebiggers3@...il.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        kernel-hardening@...ts.openwall.com,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Kevin Hao <haokexin@...il.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Wanpeng Li <wanpeng.li@...mail.com>,
        Yu-cheng Yu <yu-cheng.yu@...el.com>,
        Michael Halcrow <mhalcrow@...gle.com>,
        Eric Biggers <ebiggers@...gle.com>
Subject: Re: [PATCH] x86/fpu: Simplify fpu__activate_fpstate_read()

On Sat, Sep 23, 2017 at 01:29:32PM +0200, Ingo Molnar wrote:
> > > > 
> > > > Ok - could you please rebase these to to tip:master that is at:
> > > > 
> > > > 	git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git master
> > > > 
> > > > In particular this has a WIP.x86/fpu branch with FPU fixes+changes queued up but 
> > > > not merged upstream (yet), which conflict with these changes. I'd like to merge 
> > > > them all together.
> > > > 
> > > 
> > > Working on it, but there is a problem with current tip.  PTRACE_GETREGSET is
> > > causing the following warning:
> > 
> > Yes, the warning should be harmless, and I fixed it locally earlier today - does 
> > the patch below solve it for you as well?
> 
> Note that this fix is now part of tip:master as well, so if you re-test -tip you 
> should get all the latest fixes as well (including yours!).
> 

No issues so far with the latest tip/master (commit e7c6e3675331).

Eric