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:   Paul Burton <paul.burton@mips.com>
To:     Paul Burton <pburton@wavecomp.com>
CC:     "linux-mips@linux-mips.org" <linux-mips@linux-mips.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Paul Burton <pburton@wavecomp.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>,
        "linux-mips@linux-mips.org" <linux-mips@linux-mips.org>
Subject: Re: [PATCH 1/2] MIPS: Use Kconfig to select CPU_NO_EFFICIENT_FFS
Thread-Topic: [PATCH 1/2] MIPS: Use Kconfig to select CPU_NO_EFFICIENT_FFS
Thread-Index: AQHUd70Nj7bmBkBSmUuHKRskL/vjkaVOTyqA
Date:   Tue, 13 Nov 2018 22:22:12 +0000
Message-ID: <CY4PR2201MB1272B73DDE21899898EB23BEC1C20@CY4PR2201MB1272.namprd22.prod.outlook.com>
References: <20181108234409.21199-1-paul.burton@mips.com>
In-Reply-To: <20181108234409.21199-1-paul.burton@mips.com>
Accept-Language: en-US
Content-Language: en-US
x-ms-exchange-messagesentrepresentingtype: 1
x-originating-ip: [4.16.204.77]
x-ms-publictraffictype: Email
x-microsoft-exchange-diagnostics: 1;CY4PR2201MB1350;6:DpFdykfYRcJuQE2XMQpGJmA6qijJpBxSsOU6yATPflD22nQApDfASXkiCE7QGdSMTZHm760CqtJg6RbDtV009fBuahBjCRzqAynPvn+UT5SZQAFXsRQFrov1gEb4tBydlezR7axqpuikf3PvxkUuEc8Wu+mnOvElW03Q+FPGK3Ggfeu1OIf/ZHtzm4AHPFzJ5jaSgFDJaEYOIPLrt4au54gZUSW5cXRGjUvIcozxLAi+cC34BMdbhRDv31UZoWLAg1fWynbIVVjPSwRtHvY26fTI3vXMTKLD0fOHTE26IkVEYdQkv9jURi413tkGzgchvF9GiEv/d+EgaaoMErNLrxHwB9mXi37iqDsvv8O3jlmJLwa6A13o3ghPayLsfnvha989W0t5bIGUJSa4LtaJTarU6bPvCxSe8/0MI/ZZ9FwzLAkOaIqlTgjGJVzLlcOZRej2FOWQ4duiaeRMwB0ucQ==;5:1ehw31HhaiF/b0uIM+AcnnvN9eous/77uA9TF8jYxTDyC/fG0TLNyQPiz123hVoCv+we7vkd6VIwm2Ic0VuCShnFD+c0OBa7rvBCbqNG/th5IIQHuMKxkTju9eALl7ZZjxljboRgYvrEtRD4toV7hia16DQYyVBCBOjCoykOw+0=;7:tYDyDAZeUsNe1gbI5cHBMMPPzyOllPr/OpyhPhCUl6Q5lPwoytYkzW45UMePpuhiUiI3KLy5k2yKFGk/i0Fpn1UDjtntEe7B1vX+JpBCvkN+Pa9j0J82qLgPj0IVaJ/qmonVyH9YaGBHMg1Gdbq7oA==
x-ms-office365-filtering-correlation-id: 7092aa8a-09ca-4fcb-e398-08d649b675b4
x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390060)(7020095)(4652040)(7021145)(8989299)(5600074)(711020)(4534185)(7022145)(4603075)(4627221)(201702281549075)(8990200)(2017052603328)(7153060)(7193020);SRVR:CY4PR2201MB1350;
x-ms-traffictypediagnostic: CY4PR2201MB1350:
x-microsoft-antispam-prvs: <CY4PR2201MB1350E2D609570F1FF8FEC9C9C1C20@CY4PR2201MB1350.namprd22.prod.outlook.com>
x-exchange-antispam-report-test: UriScan:(85827821059158);
x-ms-exchange-senderadcheck: 1
x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(6040522)(2401047)(5005006)(8121501046)(3002001)(93006095)(3231382)(944501410)(52105112)(10201501046)(148016)(149066)(150057)(6041310)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123560045)(20161123562045)(20161123564045)(2016111802025)(20161123558120)(6043046)(201708071742011)(7699051)(76991095);SRVR:CY4PR2201MB1350;BCL:0;PCL:0;RULEID:;SRVR:CY4PR2201MB1350;
x-forefront-prvs: 085551F5A8
x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(346002)(376002)(136003)(39840400004)(366004)(396003)(189003)(199004)(476003)(486006)(446003)(11346002)(42882007)(33656002)(2900100001)(97736004)(25786009)(6246003)(3846002)(6116002)(44832011)(54906003)(316002)(71200400001)(71190400001)(6506007)(102836004)(105586002)(66066001)(106356001)(6862004)(386003)(186003)(39060400002)(9686003)(7696005)(52116002)(76176011)(4326008)(478600001)(26005)(99286004)(14454004)(55016002)(5660300001)(7736002)(305945005)(14444005)(81166006)(6436002)(8676002)(8936002)(74316002)(81156014)(68736007)(256004)(2906002)(229853002)(53936002);DIR:OUT;SFP:1102;SCL:1;SRVR:CY4PR2201MB1350;H:CY4PR2201MB1272.namprd22.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1;
received-spf: None (protection.outlook.com: wavecomp.com does not designate
 permitted sender hosts)
x-microsoft-antispam-message-info: Q8Q+/HgZKPhUsVKv4QXqtOFHgsifEPEuqblrWZDC9F7Hb6tEwXVJQk+SRziHYzyQVnVg0vumUsUBMTXFs0rNz0K0r+fViGxHkoFRPU9uzxPDw09gsU9fktNGMt/QdQfIz239h6gYfS0msIteW4FZDvMtmX2ibhyBw8RKQG1dWBdWcZug4qSwc5yg77IWTtmyBahQTPndrl5X08BKWQjaXlMCzPiv7+UFxjspLgqPjEQFQfeLa+IpbTPKxs6z2Vn5hwx7/0wGUCt59g/gG2RkHTxxYT8x7ZdvGIyqAqEetYKtlcv1BajDyx3OpNNpJI9rUDvTmdWXT5tiri7/2xmGdBibo7/q7NOzYNtQRwuNNYw=
spamdiagnosticoutput: 1:99
spamdiagnosticmetadata: NSPM
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-OriginatorOrg: mips.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 7092aa8a-09ca-4fcb-e398-08d649b675b4
X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Nov 2018 22:22:12.9670
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 463607d3-1db3-40a0-8a29-970c56230104
X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR2201MB1350
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Hello,

Paul Burton wrote:
> Select CONFIG_CPU_NO_EFFICIENT_FFS via Kconfig when the kernel is
> configured for a pre-MIPS32r1 CPU, rather than defining its equivalent
> in asm/cpu-features.h based upon overrides of cpu_has_mips* macros.
>=20
> The latter only works if a platform has an cpu-feature-overrides.h
> header which defines cpu_has_mips* macros, which are not generally
> needed. There are many cases where we know that the target ISA for a
> kernel build is MIPS32r1 or later & thus includes the CLZ instruction,
> without requiring any overrides from the platform. Using Kconfig allows
> us to take those into account, and more naturally make a decision about
> instruction support using information about the target ISA.
>=20
> Signed-off-by: Paul Burton <paul.burton@mips.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>

Series applied to mips-next.

Thanks,
    Paul

[ This message was auto-generated; if you believe anything is incorrect
  then please email paul.burton@mips.com to report it. ]