From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5EC8BC2BB84 for ; Thu, 10 Sep 2020 09:45:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1A7A820665 for ; Thu, 10 Sep 2020 09:45:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730324AbgIJJpp (ORCPT ); Thu, 10 Sep 2020 05:45:45 -0400 Received: from smtp.h3c.com ([60.191.123.56]:46165 "EHLO h3cspam01-ex.h3c.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728443AbgIJJpm (ORCPT ); Thu, 10 Sep 2020 05:45:42 -0400 Received: from DAG2EX08-IDC.srv.huawei-3com.com ([10.8.0.71]) by h3cspam01-ex.h3c.com with ESMTPS id 08A9irMK054157 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 10 Sep 2020 17:44:53 +0800 (GMT-8) (envelope-from tian.xianting@h3c.com) Received: from DAG2EX03-BASE.srv.huawei-3com.com (10.8.0.66) by DAG2EX08-IDC.srv.huawei-3com.com (10.8.0.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Thu, 10 Sep 2020 17:44:56 +0800 Received: from DAG2EX03-BASE.srv.huawei-3com.com ([fe80::5d18:e01c:bbbd:c074]) by DAG2EX03-BASE.srv.huawei-3com.com ([fe80::5d18:e01c:bbbd:c074%7]) with mapi id 15.01.1713.004; Thu, 10 Sep 2020 17:44:56 +0800 From: Tianxianting To: Jens Axboe , "ast@kernel.org" , "daniel@iogearbox.net" , "kafai@fb.com" , "songliubraving@fb.com" , "yhs@fb.com" , "andriin@fb.com" , "john.fastabend@gmail.com" , "kpsingh@chromium.org" CC: "linux-block@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "netdev@vger.kernel.org" , "bpf@vger.kernel.org" Subject: RE: [PATCH] block: remove redundant empty check of mq_list Thread-Topic: [PATCH] block: remove redundant empty check of mq_list Thread-Index: AQHWhnZLNDw9Ap0NoUKJovJuaKCnsqlf1fuAgAHGWJA= Date: Thu, 10 Sep 2020 09:44:56 +0000 Message-ID: References: <20200909064814.5704-1-tian.xianting@h3c.com> <466b8c40-9d53-8a40-6c5b-f76db2974c04@kernel.dk> In-Reply-To: <466b8c40-9d53-8a40-6c5b-f76db2974c04@kernel.dk> Accept-Language: en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.99.141.128] x-sender-location: DAG2 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-DNSRBL: X-MAIL: h3cspam01-ex.h3c.com 08A9irMK054157 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org SGkgSmVucywNClRoYW5rcyBmb3IgeW91ciBmZWVkYmFjaywNClllcywgYmxrX2ZsdXNoX3BsdWdf bGlzdCgpIGlzIG9ubHkgY2FsbGVyIG9mIGJsa19tcV9mbHVzaF9wbHVnX2xpc3QoKS4NClNvIEkg Y2hlY2tlZCB0aGUgY2FsbGVycyBvZiBibGtfZmx1c2hfcGx1Z19saXN0KCksIGZvdW5kIGJlbG93 IGNvZGUgcGF0aCB3aWxsIGNhbGwgYmxrX2ZsdXNoX3BsdWdfbGlzdCgpOg0KCWlvX3NjaGVkdWxl X3ByZXBhcmUvc2NoZWRfc3VibWl0X3dvcmstPmJsa19zY2hlZHVsZV9mbHVzaF9wbHVnDQoJd3Jp dGViYWNrX3NiX2lub2Rlcy0+YmxrX2ZsdXNoX3BsdWcNCglibGtfZmluaXNoX3BsdWcNCglkbV9z dWJtaXRfYmlvL19fc3VibWl0X2Jpb19ub2FjY3RfbXEvX19zdWJtaXRfYmlvLT5ibGtfbXFfc3Vi bWl0X2Jpbw0KCWJsa19wb2xsDQoNClNvIEkgdGhpbmsgdGhlcmUgYXJlIHN0aWxsIG1hbnkgY2hh bmNlcyB0byBkbyB0aGUgcmVkdW5kYW50IGp1ZGdlPw0KDQotLS0tLU9yaWdpbmFsIE1lc3NhZ2Ut LS0tLQ0KRnJvbTogSmVucyBBeGJvZSBbbWFpbHRvOmF4Ym9lQGtlcm5lbC5ka10gDQpTZW50OiBX ZWRuZXNkYXksIFNlcHRlbWJlciAwOSwgMjAyMCAxMDoyMSBQTQ0KVG86IHRpYW54aWFudGluZyAo UkQpIDx0aWFuLnhpYW50aW5nQGgzYy5jb20+OyBhc3RAa2VybmVsLm9yZzsgZGFuaWVsQGlvZ2Vh cmJveC5uZXQ7IGthZmFpQGZiLmNvbTsgc29uZ2xpdWJyYXZpbmdAZmIuY29tOyB5aHNAZmIuY29t OyBhbmRyaWluQGZiLmNvbTsgam9obi5mYXN0YWJlbmRAZ21haWwuY29tOyBrcHNpbmdoQGNocm9t aXVtLm9yZw0KQ2M6IGxpbnV4LWJsb2NrQHZnZXIua2VybmVsLm9yZzsgbGludXgta2VybmVsQHZn ZXIua2VybmVsLm9yZzsgbmV0ZGV2QHZnZXIua2VybmVsLm9yZzsgYnBmQHZnZXIua2VybmVsLm9y Zw0KU3ViamVjdDogUmU6IFtQQVRDSF0gYmxvY2s6IHJlbW92ZSByZWR1bmRhbnQgZW1wdHkgY2hl Y2sgb2YgbXFfbGlzdA0KDQpPbiA5LzkvMjAgMTI6NDggQU0sIFhpYW50aW5nIFRpYW4gd3JvdGU6 DQo+IGJsa19tcV9mbHVzaF9wbHVnX2xpc3QoKSBpdHNlbGYgd2lsbCBkbyB0aGUgZW1wdHkgY2hl Y2sgb2YgbXFfbGlzdCwgc28gDQo+IHJlbW92ZSBzdWNoIGNoZWNrIGluIGJsa19mbHVzaF9wbHVn X2xpc3QoKS4NCj4gQWN0dWFsbHkgbm9ybWFsbHkgbXFfbGlzdCBpcyBub3QgZW1wdHkgd2hlbiBi bGtfZmx1c2hfcGx1Z19saXN0IGlzIA0KPiBjYWxsZWQuDQoNCkl0J3MgY2hlYXBlciB0byBkbyBp biB0aGUgY2FsbGVyLCBpbnN0ZWFkIG9mIGRvaW5nIHRoZSBmdW5jdGlvbiBjYWxsIGFuZCB0aGVu IGFib3J0aW5nIGlmIGl0J3MgZW1wdHkuIFNvIEknZCBzdWdnZXN0IGp1c3QgbGVhdmluZyBpdCBh bG9uZS4NClJpZ2h0IG5vdyB0aGlzIGlzIHRoZSBvbmx5IGNhbGxlciwgYnV0IGl0J3MgbmljZXIg dG8gYXNzdW1lIHdlIGNhbiBiZSBjYWxsZWQgaW4gYW55IHN0YXRlIHZzIG5vdCBoYXZpbmcgdGhl IGNoZWNrLg0KDQotLQ0KSmVucyBBeGJvZQ0KDQo=