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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F02AAC54EE9 for ; Tue, 27 Sep 2022 08:20:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231490AbiI0IUy (ORCPT ); Tue, 27 Sep 2022 04:20:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48758 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231181AbiI0IUq (ORCPT ); Tue, 27 Sep 2022 04:20:46 -0400 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.85.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5C743A6C4E for ; Tue, 27 Sep 2022 01:20:45 -0700 (PDT) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-310-Qdzirnz2PdetQmdwpyNdtA-1; Tue, 27 Sep 2022 09:20:42 +0100 X-MC-Unique: Qdzirnz2PdetQmdwpyNdtA-1 Received: from AcuMS.Aculab.com (10.202.163.4) by AcuMS.aculab.com (10.202.163.4) with Microsoft SMTP Server (TLS) id 15.0.1497.38; Tue, 27 Sep 2022 09:20:39 +0100 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.040; Tue, 27 Sep 2022 09:20:39 +0100 From: David Laight To: 'YingChi Long' , Peter Zijlstra CC: "tglx@linutronix.de" , "ndesaulniers@google.com" , Ingo Molnar , Borislav Petkov , Dave Hansen , "x86@kernel.org" , "H. Peter Anvin" , Paolo Bonzini , "Chang S. Bae" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH] x86/fpu: use __alignof__ to avoid UB in TYPE_ALIGN Thread-Topic: [PATCH] x86/fpu: use __alignof__ to avoid UB in TYPE_ALIGN Thread-Index: AQHY0bfRNKadILb+rU6iQrBlkJqLV63y7+SQ Date: Tue, 27 Sep 2022 08:20:39 +0000 Message-ID: <40fca2eef36a40f4b9a4145a0f7fe57c@AcuMS.aculab.com> References: <20220925153151.2467884-1-me@inclyc.cn> <0ed40d5b-a404-f424-c9c4-2adf1bf9750b@inclyc.cn> In-Reply-To: <0ed40d5b-a404-f424-c9c4-2adf1bf9750b@inclyc.cn> Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogWWluZ0NoaSBMb25nDQo+IFNlbnQ6IDI2IFNlcHRlbWJlciAyMDIyIDE0OjE4DQo+IA0K PiBTZWVtcyBHQ0MgX19hbGlnbm9mX18gaXMgbm90IGV2YWx1YXRlZCB0byB0aGUgbWluaW11bSBh bGlnbm1lbnQgb2Ygc29tZQ0KPiBUWVBFLCBhbmQgZGVwZW5kcyBvbiBmaWVsZHMgb2YgdGhlIHN0 cnVjdC4NCj4gDQo+ICA+IE5vdGFibHkgSSB0aGluayAnbG9uZyBsb25nJyBoYXMgNCBieXRlIGFs aWdubWVudCBvbiBpMzg2IGFuZCBzb21lIG90aGVyDQo+ICA+IDMyYml0IGFyY2hzLg0KPiANCj4g QzExIF9BbGlnbm9mIG1hdGNoZXMgaW4gdGhlIGNhc2UgKHNlZSBnb2Rib2x0IGxpbmsgYmVsb3cp LiBIb3cgYWJvdXQNCj4gc3dpdGNoIHRvIF9BbGlnbm9mPw0KDQpfX2FsaWdub2ZfXygpIHJldHVy bnMgdGhlIHByZWZlcnJlZCBhbGlnbm1lbnQsIG5vdCB0aGUgbWluaW1hbCBvbmUuDQpTbyBvbmUg aTM4NiBpdCByZXR1cm5zIDggZm9yICdsb25nIGxvbmcnIHJhdGhlciB0aGFuIDQuDQoNClVzaW5n IGFsaWdub2Yoc3RydWN0e2xvbmcgbG9uZyB4O30pIGRvZXMgZ2l2ZSB0aGUgcmVxdWlyZWQgNC4N CihhcyBkb2VzIF9BbGlnbm9mKCkpLg0KDQpTZWUgaHR0cHM6Ly9nb2Rib2x0Lm9yZy96LzEzeFRZ WWQxMQ0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5 IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRp b24gTm86IDEzOTczODYgKFdhbGVzKQ0K