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;
From:   KY Srinivasan <kys@microsoft.com>
To:     Thomas Gleixner <tglx@linutronix.de>
CC:     "x86@kernel.org" <x86@kernel.org>,
        "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "devel@linuxdriverproject.org" <devel@linuxdriverproject.org>,
        "olaf@aepfle.de" <olaf@aepfle.de>,
        "apw@canonical.com" <apw@canonical.com>,
        "jasowang@redhat.com" <jasowang@redhat.com>,
        "hpa@zytor.com" <hpa@zytor.com>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        "Michael Kelley (EOSG)" <Michael.H.Kelley@microsoft.com>,
        "vkuznets@redhat.com" <vkuznets@redhat.com>
Subject: RE: [PATCH 1/5] X86: Hyper-V: Enlighten APIC access
Thread-Topic: [PATCH 1/5] X86: Hyper-V: Enlighten APIC access
Thread-Index: AQHT3MEt4bId0VfgvUSyGyqrvfSnAKQTl0wAgACE5mA=
Date:   Fri, 27 Apr 2018 05:52:32 +0000
Message-ID: <MW2PR2101MB11133176E3843487485599A7A08D0@MW2PR2101MB1113.namprd21.prod.outlook.com>
References: <20180425181110.8683-1-kys@linuxonhyperv.com>
 <20180425181250.8740-1-kys@linuxonhyperv.com>
 <alpine.DEB.2.21.1804262342140.1596@nanos.tec.linutronix.de>
In-Reply-To: <alpine.DEB.2.21.1804262342140.1596@nanos.tec.linutronix.de>
Accept-Language: en-US
Content-Language: en-US
received-spf: None (protection.outlook.com: microsoft.com does not designate
 permitted sender hosts)
spamdiagnosticoutput: 1:99
spamdiagnosticmetadata: NSPM
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-Network-Message-Id: 70eb52b6-af5c-4613-01d1-08d5ac03119e
X-MS-Exchange-CrossTenant-originalarrivaltime: 27 Apr 2018 05:52:32.1649
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR2101MB1131
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org


> -----Original Message-----
> From: Thomas Gleixner <tglx@linutronix.de>
> Sent: Thursday, April 26, 2018 2:49 PM
> To: KY Srinivasan <kys@microsoft.com>
> Cc: x86@kernel.org; gregkh@linuxfoundation.org; linux-
> kernel@vger.kernel.org; devel@linuxdriverproject.org; olaf@aepfle.de;
> apw@canonical.com; jasowang@redhat.com; hpa@zytor.com; Stephen
> Hemminger <sthemmin@microsoft.com>; Michael Kelley (EOSG)
> <Michael.H.Kelley@microsoft.com>; vkuznets@redhat.com
> Subject: Re: [PATCH 1/5] X86: Hyper-V: Enlighten APIC access
>=20
> On Wed, 25 Apr 2018, kys@linuxonhyperv.com wrote:
> > --- /dev/null
> > +++ b/arch/x86/hyperv/hv_apic.c
> > @@ -0,0 +1,98 @@
> > +// SPDX-License-Identifier: GPL-2.0
>=20
> Thanks for putting the license identifier in.
>=20
> > +
> > +/*
> > + * Hyper-V specific APIC code.
> > + *
> > + * Copyright (C) 2018, Microsoft, Inc.
> > + *
> > + * Author : K. Y. Srinivasan <kys@microsoft.com>
>=20
> But can you please check with your lawyers whether you can avoid the
> pointless boilerplate? The SPDX identifier should cover it.

I will consult with MSFT legal on this.
>=20
> > + * This program is free software; you can redistribute it and/or modif=
y it
> > + * under the terms of the GNU General Public License version 2 as
> published
> > + * by the Free Software Foundation.
> > + *
> > + * This program is distributed in the hope that it will be useful, but
> > + * WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD
> TITLE or
> > + * NON INFRINGEMENT.  See the GNU General Public License for more
> > + * details.
> > + *
> > + */
> > +
> > +#include <linux/types.h>
> > +#include <asm/hypervisor.h>
> > +#include <asm/mshyperv.h>
> > +#include <linux/version.h>
> > +#include <linux/vmalloc.h>
> > +#include <linux/mm.h>
> > +#include <linux/clockchips.h>
> > +#include <linux/hyperv.h>
> > +#include <linux/slab.h>
> > +#include <linux/cpuhotplug.h>
>=20
> We usually order the includes
>=20
> #include <linux/....>
> ...
> #include <linux/....>
>=20
> #include <asm/....>
> #include <asm/....>
>=20
>=20
> > -void hyperv_init(void);
> > +void __init hyperv_init(void);
> >  void hyperv_setup_mmu_ops(void);
> >  void hyper_alloc_mmu(void);
> >  void hyperv_report_panic(struct pt_regs *regs, long err);
> > @@ -269,14 +269,16 @@ void hyperv_reenlightenment_intr(struct pt_regs
> *regs);
> >  void set_hv_tscchange_cb(void (*cb)(void));
> >  void clear_hv_tscchange_cb(void);
> >  void hyperv_stop_tsc_emulation(void);
> > +void hv_apic_init(void);
> >  #else /* CONFIG_HYPERV */
> > -static inline void hyperv_init(void) {}
> > +static __init  inline void hyperv_init(void) {}
>=20
> The __init on the empty inline function is pointless.
>=20
> Other than the few nits. This looks well done!

Thanks Thomas. I will address all the issues you have brought up in
the next version.

Regards,

K. Y