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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 6BF1CC433E0 for ; Sat, 27 Jun 2020 10:24:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 53F88208B6 for ; Sat, 27 Jun 2020 10:24:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726524AbgF0KYN (ORCPT ); Sat, 27 Jun 2020 06:24:13 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([207.82.80.151]:59216 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725994AbgF0KYM (ORCPT ); Sat, 27 Jun 2020 06:24:12 -0400 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-104-NvbIYRCJMCmki4qn6LkT5g-1; Sat, 27 Jun 2020 11:24:08 +0100 X-MC-Unique: NvbIYRCJMCmki4qn6LkT5g-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; Sat, 27 Jun 2020 11:24:07 +0100 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; Sat, 27 Jun 2020 11:24:07 +0100 From: David Laight To: 'Kars Mulder' , Greg Kroah-Hartman CC: Pavel Machek , "linux-kernel@vger.kernel.org" , Kai-Heng Feng Subject: RE: Writing to a const pointer: is this supposed to happen? Thread-Topic: Writing to a const pointer: is this supposed to happen? Thread-Index: AQHWSju/rqA8ozob6UepcWuq3RM2GKjsP5Lw Date: Sat, 27 Jun 2020 10:24:07 +0000 Message-ID: <0ceda3b41fe446e792fce5ff2634c48f@AcuMS.aculab.com> References: <20200624131016.GA1807770@kroah.com> <1da2-5ef37080-31-6d4cde00@228034409> In-Reply-To: <1da2-5ef37080-31-6d4cde00@228034409> Accept-Language: en-GB, en-US Content-Language: 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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogS2FycyBNdWxkZXINCj4gU2VudDogMjQgSnVuZSAyMDIwIDE2OjI2DQo+IE9uIFdlZG5l c2RheSwgSnVuZSAyNCwgMjAyMCAxNToxMCBDRVNULCBHcmVnIEtyb2FoLUhhcnRtYW4gd3JvdGU6 DQo+ID4gSGF2ZSB5b3UgaGl0IGFueSBydW50aW1lIGlzc3VlcyB3aXRoIHRoaXMgY29kZSBkb2lu ZyB0aGlzPyAgVGhlc2UNCj4gPiBzdHJpbmdzIHNob3VsZCBiZSBoZWxkIGluIHdyaXRhYmxlIG1l bW9yeSwgcmlnaHQ/ICBPciBkbyB5b3Ugc2VlIGENCj4gPiBjb2RlcGF0aCB3aGVyZSB0aGF0IGlz IG5vdCB0aGUgY2FzZT8NCj4gDQo+IEkgaGF2ZW4ndCByYW4gaW50byBhbnkgaXNzdWVzIHdpdGgg aXQ7IEkgd2FzIGp1c3QgbG9va2luZyBhdCB0aGUgY29kZQ0KPiBhcyByZWZlcmVuY2UgZm9yIGEg cGF0Y2ggSSdtIHdvcmtpbmcgb24uDQo+IA0KPiBJIGluaXRpYWxseSBhc3N1bWVkIHRoYXQgY2Fz dGluZyBhIGNvbnN0IHBvaW50ZXIgdG8gbm9uLWNvbnN0IGFuZA0KPiB3cml0aW5nIHRvIGl0IHdv dWxkIGJlIHVuZGVmaW5lZCBiZWhhdmlvdXIsIGJ1dCBhZnRlciByZWFkaW5nIHRocm91Z2gNCj4g dGhlIEM5OSBzdGFuZGFyZCBJIGNhbid0IGZpbmQgYW4gdW5hbWJpZ3VvdXMgc3RhdGVtZW50IHdo ZXRoZXIgaXQgaXMNCj4gdW5kZWZpbmVkIGJlaGF2aW91ciBldmVuIGlmIHRoZSBjb25zdCBwb2lu dGVyIHBvaW50cyB0byBhbiBvYmplY3QgdGhhdA0KPiB3YXMgb3JpZ2luYWxseSBub24tY29uc3Qg KGxpa2UgY2hhciogLT4gY29uc3QgY2hhciogLT4gY2hhciogY2FzdHMpOyBpdA0KPiBvbmx5IHNh eXMgaXQgaXMgdW5kZWZpbmVkIGJlaGF2aW91ciBpZiB0aGUgb2JqZWN0IHdhcyBkZWZpbmVkIHdp dGggdGhlDQo+IGNvbnN0IHF1YWxpZmllci4NCj4gDQo+IEkgc2hvdWxkIHByb2JhYmx5IHN0b3Ag Ym90aGVyaW5nIHlvdSB3aXRoIG15IG5ld2JpZSBxdWVzdGlvbnMuDQoNCklJU0MgVGhlIEMgc3Rh bmRhcmQgJ3J1bGVzJyBhYm91dCBjYXN0cyBvbmx5IHJlYWxseSBhbGxvdyBhIHBvaW50ZXIgdG8N CmJlIHRlbXBvcmFyaWx5IGNhc3QgdG8gYSBkaWZmZXJlbnQgdHlwZSBhbmQgdGhlbiBjYXN0IGJh Y2sgdG8gdGhlDQpvcmlnaW5hbCB0eXBlIGJlZm9yZSBiZWluZyB1c2VkLg0KDQpPbmUgZWZmZWN0 IG9mIHRoYXQgaXMgY29kZSBsaWtlOg0Kdm9pZCBmb28oYmFoX3QgKmJhaHApDQp7DQoJYmFoX3Qg YmFoOw0KCS8qIENvcHkgYmVjYXVzZSBiYWhwIG1pZ2h0IGJlIG1pc2FsaWduZWQgKi8NCgltZW1j cHkoJmJhaCwgKHZvaWQgKiliYWhwLCBzaXplb2YgYmFoKTsNCmRvZXNuJ3Qgd29yayBiZWNhdXNl IHRoZSBjb21waWxlciBrbm93cyB0aGF0ICdiYWhwJyBtdXN0DQpwb2ludCB0byBhbGlnbmVkIG1l bW9yeSAtIGJlY2F1c2UgdGhhdCBpcyB0aGUgb25seSBwbGFjZQ0KaXQgY2FuIGxlZ2l0aW1hdGVs eSBjb21lIGZyb20uDQpObyBhbW91bnQgb2YgY2FzdHMgd2lsbCBzdG9wIGl0IGlubGluaW5nIG1l bWNweSgpIGFuZCB1c2luZw0Kd2lkZSByZWdpc3RlciBjb3BpZXIuDQoNClRoZSBjb2RlIHF1b3Rl ZCAodXNpbmcgc3Ryc2V0KCkpIGlzIGFsbW9zdCBjZXJ0YWlubHkgd3JvbmcuDQpUaGUgY2FsbGVy IGlzIHVubGlrZWx5IHRvIGV4cGVjdCB0aGUgaW5wdXQgYmUgbW9kaWZpZWQuDQpTaW5jZSBpdCBk b2Vzbid0IGZhdWx0IHRoZSBzdHJpbmcgbXVzdCBiZSBpbiByZWFkLXdyaXRlIG1lbW9yeS4NCg0K Q29kZSBjYW4gYmUgY29tcGlsZWQgd2l0aCAtV2Nhc3QtcXVhbCB0aGF0IHdpbGwgZ2VuZXJhdGUg YQ0Kd2FybmluZyB3aGVuICdjb25zdCcgZ2V0cyBjYXN0IGF3YXkuDQpUaGVyZSBhcmUgc29tZSBs ZWdpdGltYXRlIHJlYXNvbnMgdG8gcmVtb3ZlICdjb25zdCcsIGJ1dCBub3QNCm1hbnkuDQoNCglE YXZpZA0KDQotDQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91 bnQgRmFybSwgTWlsdG9uIEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlvbiBObzogMTM5 NzM4NiAoV2FsZXMpDQo=