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=-3.8 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 40CC2C433E0 for ; Mon, 4 Jan 2021 16:48:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D11D224DF for ; Mon, 4 Jan 2021 16:48:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727889AbhADQsE (ORCPT ); Mon, 4 Jan 2021 11:48:04 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.86.151]:26655 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725840AbhADQsD (ORCPT ); Mon, 4 Jan 2021 11:48:03 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-235-IL2iOTcMOBSlpA7savvPuA-1; Mon, 04 Jan 2021 16:46:24 +0000 X-MC-Unique: IL2iOTcMOBSlpA7savvPuA-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Mon, 4 Jan 2021 16:46:24 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Mon, 4 Jan 2021 16:46:24 +0000 From: David Laight To: David Laight , Al Viro , Christoph Hellwig , "linux-kernel@vger.kernel.org" CC: X86 ML Subject: RE: in_compat_syscall() on x86 Thread-Topic: in_compat_syscall() on x86 Thread-Index: Adbikf8I52+Fp/HYSH2MXxqk00t/OgAJxC1g Date: Mon, 4 Jan 2021 16:46:24 +0000 Message-ID: References: In-Reply-To: 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 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com 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 Q29weSB4ODZAa2VybmVsLm9yZw0KDQo+IC0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tDQo+IEZy b206IERhdmlkIExhaWdodCA8RGF2aWQuTGFpZ2h0QEFDVUxBQi5DT00+DQo+IFNlbnQ6IDA0IEph bnVhcnkgMjAyMSAxMjoxNw0KPiBUbzogQWwgVmlybyA8dmlyb0B6ZW5pdi5saW51eC5vcmcudWs+ OyBDaHJpc3RvcGggSGVsbHdpZyA8aGNoQGxzdC5kZT47IGxpbnV4LWtlcm5lbEB2Z2VyLmtlcm5l bC5vcmcNCj4gU3ViamVjdDogaW5fY29tcGF0X3N5c2NhbGwoKSBvbiB4ODYNCj4gDQo+IE9uIHg4 NiBpbl9jb21wYXRfc3lzY2FsbCgpIGlzIGRlZmluZWQgYXM6DQo+ICAgICBpbl9pYTMyX3N5c2Nh bGwoKSB8fCBpbl94MzJfc3lzY2FsbCgpDQo+IA0KPiBOb3cgaW5faWEzMl9zeXNjYWxsKCkgaXMg YSBzaW1wbGUgY2hlY2sgb2YgdGhlIFRTX0NPTVBBVCBmbGFnLg0KPiBIb3dldmVyIGluX3gzMl9z eXNjYWxsKCkgaXMgYSBob3JyaWQgYmVhc3QgdGhhdCBoYXMgdG8gaW5kaXJlY3QNCj4gdGhyb3Vn aCB0byB0aGUgb3JpZ2luYWwgJWVheCB2YWx1ZSAoaWUgdGhlIHN5c2NhbGwgbnVtYmVyKSBhbmQN Cj4gY2hlY2sgZm9yIGEgYml0IHRoZXJlLg0KPiANCj4gU28gb24gYSBrZXJuZWwgd2l0aCB4MzIg c3VwcG9ydCAocHJvYmFibHkgbW9zdCBkaXN0cm8ga2VybmVscykNCj4gdGhlIGluX2NvbXBhdF9z eXNjYWxsKCkgY2hlY2sgaXMgcmF0aGVyIG1vcmUgZXhwZW5zaXZlIHRoYW4NCj4gb25lIG1pZ2h0 IGV4cGVjdC4NCj4gDQo+IEl0IHdvdWxkIGJlIG11Y2sgYmV0dGVyIGlmIGJvdGggY2hlY2tzIGNv dWxkIGJlIGRvbmUgdG9nZXRoZXIuDQo+IEkgdGhpbmsgdGhpcyB3b3VsZCByZXF1aXJlIHRoZSBz eXNjYWxsIGVudHJ5IGNvZGUgdG8gc2V0IGENCj4gdmFsdWUgaW4gYm90aCB0aGUgNjRiaXQgYW5k IHgzMiBlbnRyeSBwYXRocy4NCj4gKENhbiBhIHByb2Nlc3MgbWFrZSBib3RoIDY0Yml0IGFuZCB4 MzIgc3lzdGVtIGNhbGxzPykNCj4gDQo+IFRvIGRvIHRoaXMgc2Vuc2libGUgKHByb2JhYmx5KSBy ZXF1aXJlcyBhIGJ5dGUgYmUgYWxsb2NhdGVkDQo+IHRvIGhvbGQgdGhlIHN5c2NhbGwgdHlwZSAt IHJhdGhlciB0aGFuIHVzaW5nIGZsYWcgYml0cw0KPiBpbiB0aGUgJ3N0YXR1cycgZmllbGQuDQo+ IA0KPiBBcGFydCBmcm9tIHRoZSBzeXNjYWxsIGVudHJ5LCB0aGUgZXhlYyBjb2RlIHNlZW1zIHRv IGNoYW5nZQ0KPiB0aGUgc3lzY2FsbCB0eXBlIHRvIHRoYXQgb2YgdGhlIGJpbmFyeSBiZWluZyBl eGVjdXRlZC4NCj4gSSBkaWRuJ3Qgc3BvdCBhbnl0aGluZyBlbHNlIHRoYXQgY2hhbmdlcyB0aGUg ZmllbGRzLg0KPiANCj4gQnV0IEkgZmFpbGVkIHRvIGZpbmQgdGhlIGZ1bGwgbGlzdCBvZiBhbGxv Y2F0ZWQgYml0cyBmb3INCj4gdGhlICdzdGF0dXMnIGZpZWxkLg0KPiANCj4gCURhdmlkDQo+IA0K PiAtDQo+IFJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBG YXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KPiBSZWdpc3RyYXRpb24gTm86IDEzOTcz ODYgKFdhbGVzKQ0KDQotDQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkgUm9h ZCwgTW91bnQgRmFybSwgTWlsdG9uIEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlvbiBO bzogMTM5NzM4NiAoV2FsZXMpDQo=