Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Mon, 19 Nov 2018 16:06:56 +0100
From:   Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To:     Dave Hansen <dave.hansen@intel.com>
Cc:     Borislav Petkov <bp@alien8.de>, x86@kernel.org,
        Ingo Molnar <mingo@kernel.org>, linux-kernel@vger.kernel.org,
        Andy Lutomirski <luto@kernel.org>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>,
        kvm@vger.kernel.org, "Jason A. Donenfeld" <Jason@zx2c4.com>,
        Rik van Riel <riel@surriel.com>,
        Dave Hansen <dave.hansen@linux.intel.com>
Subject: Re: [PATCH] x86/fpu: Disable BH while while loading FPU registers in
 __fpu__restore_sig()
Message-ID: <20181119150656.ylbrsvchdyavms4w@linutronix.de>
References: <20181107194858.9380-1-bigeasy@linutronix.de>
 <20181107194858.9380-3-bigeasy@linutronix.de>
 <20181108145721.GC7543@zn.tnic>
 <20181109173521.2m6iijp5wkncgi77@linutronix.de>
 <20181109185202.GF21243@zn.tnic>
 <20181109232521.l2ll2n3coxygkxv4@linutronix.de>
 <20181112155643.vclej44qzg3pmbow@linutronix.de>
 <433cec57-57a9-afff-22f3-68308eda682b@intel.com>
 <20181119114151.e4mbs7ktfjojl3uf@linutronix.de>
 <982af52b-4e39-2b26-a184-2fe13f3d9f61@intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <982af52b-4e39-2b26-a184-2fe13f3d9f61@intel.com>
User-Agent: NeoMutt/20180716
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 2018-11-19 07:04:35 [-0800], Dave Hansen wrote:
> 
> Does the local_bh_disable() itself survive?

Not in __fpu__restore_sig(). I do have:
| static inline void __fpregs_changes_begin(void)
| {
|        preempt_disable();
|        local_bh_disable();
| }

and __fpregs_changes_begin() is introduced as part of the series.

Sebastian