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Lu" , Andi Kleen , "Rick Edgecombe" , Bharata B Rao , Jacob Pan , Ashok Raj , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCHv13 05/16] x86/uaccess: Provide untagged_addr() and remove tags before address check Thread-Topic: [PATCHv13 05/16] x86/uaccess: Provide untagged_addr() and remove tags before address check Thread-Index: AQHZHLDUcIP+F/h/PEiAwEZ6SoBjkq6LJK3g Date: Mon, 2 Jan 2023 13:55:05 +0000 Message-ID: <4cf29f7a1a0041da818ac7ef598d142e@AcuMS.aculab.com> References: <20221227030829.12508-1-kirill.shutemov@linux.intel.com> <20221227030829.12508-6-kirill.shutemov@linux.intel.com> <20221231001029.5nckrhtmwahb65jo@box> 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 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 RnJvbTogTGludXMgVG9ydmFsZHMNCj4gU2VudDogMzEgRGVjZW1iZXIgMjAyMiAwMDo0Mg0KPiAN Ci4uLg0KPiBBbmQgb24gNjQtYml0LCB3ZSByZWFsbHkgb25seSBuZWVkIHRvIGNoZWNrIHRoZSBo aWdoIGJpdC4NCj4gDQo+IEluIGZhY3QsIHdlIGRvbid0IGV2ZW4gd2FudCB0byAqY2hlY2sqIGl0 LCBiZWNhdXNlIHRoZW4gd2UgbmVlZCB0byBkbw0KPiB0aGF0IGRpc2d1c3RpbmcgYXJyYXlfaW5k ZXhfbWFza19ub3NwZWMgdGhpbmcgdG8gbWFzayB0aGUgYml0cyBmb3IgaXQsDQo+IHNvIGl0IHdv dWxkIGJlIGV2ZW4gYmV0dGVyIHRvIHVzZSBwdXJlbHkgYXJpdGhtZXRpYyB3aXRoIG5vDQo+IGNv bmRpdGlvbmFscyBhbnl3aGVyZS4NCj4gDQo+IEFuZCB0aGF0J3MgZXhhY3RseSB3aGF0IHdlIGNv dWxkIGRvIG9uIHg4Ni02NDoNCj4gDQo+ICAgICAgICAgbW92cSAlcmR4LCVyYXgNCj4gICAgICAg ICBzaHJxICQ2MywlcmF4DQo+ICAgICAgICAgb3JxICVyYXgsJXJkeA0KPiANCj4gd291bGQgYWN0 dWFsbHkgYmUgbm90aWNlYWJseSBiZXR0ZXIgdGhhbiB3aGF0IHdlIGRvIG5vdyBmb3IgZm9yDQo+ IFRBU0tfU0laRSBjaGVja2luZyBfYW5kXyBmb3IgdGhlIGFycmF5IGluZGV4IG1hc2tpbmcgKGZv ciBwdXR1c2VyLlMsDQo+IHdlJ2QgdXNlICVyYnggaW5zdGVhZCBvZiAlcmF4IGluIHRoYXQgc2Vx dWVuY2UpLg0KLi4uDQo+IEl0IHdvdWxkIGp1c3QgdHVybiBhbGwga2VybmVsIGFkZHJlc3NlcyBp bnRvIGFsbCBvbmVzLCB3aGljaCBpcyB0aGVuDQo+IGd1YXJhbnRlZWQgdG8gZmF1bHQuIFNvIG5v IG5lZWQgZm9yIGFueSBjb25kaXRpb25hbCB0aGF0IG5ldmVyDQo+IHRyaWdnZXJzIGluIHJlYWwg bGlmZSBhbnl3YXkuDQoNCkFyZSBieXRlIGxvYWRzIGd1YXJhbnRlZWQgdG8gZmF1bHQ/DQpJIHN1 c3BlY3QgdGhlICdhbGwgb25lcycgYWRkcmVzcyBjYW4gYmUgYXNzaWduZWQgdG8gaW8uDQpTbyBn ZXQvcHV0X3VzZXIgZm9yIGEgYnl0ZSBwcm9iYWJseSBuZWVkcyBhICdqcycgdGVzdCBhZnRlciB0 aGUgJ29ycScuDQooSSBkb24ndCB0aGluayB5b3UgbmVlZCB0byB3b3JyeSBhYm91dCBhIGFwZWN1 bGF0aXZlIGxvYWQgZnJvbSBhbg0KdW5jYWNoZWQgYWRkcmVzcy4pDQoNCi4uLg0KPiBBbmQgb25j ZSB3ZSBkb24ndCB0ZXN0IGFnYWluc3QgVEFTS19TSVpFLCB0aGUgbmVlZCBmb3IgVU5UQUdfQURE UiBqdXN0DQo+IGdvZXMgYXdheSwgc28gbm93IExBTSBpcyBiZXR0ZXIgdG9vLg0KPiANCj4gSW4g b3RoZXIgd29yZHMsIHdlIGNvdWxkIGFjdHVhbGx5IGltcHJvdmUgb24gb3VyIGN1cnJlbnQgY29k ZSBfYW5kXw0KPiBzaW1wbGlmeSB0aGUgTEFNIHNpdHVhdGlvbi4gV2luLXdpbi4NCg0KUHJlc3Vt YWJseSB0aGUgZmF1bHQgaGFuZGxlciBhbHJlYWR5IGhhcyB0aGUgY29kZSB0byB1bnRhZyBhZGRy ZXNzZXMuDQoNCkl0IGhhcyB0byBiZSBzYWlkIHRoYXQgSSBkb24ndCByZWFsbHkgc2VlIHdoeSB0 YWdnaW5nIGFkZHJlc3NlcyBpcyBhDQpzaWduaWZpY2FudCBiZW5lZml0IHVubGVzcyB0aGUgaGFy ZHdhcmUgY2hlY2tzIHRoYW4gdGhlIFBURS9UTEIgaXMNCmFsc28gc2V0IHdpdGggdGhlIGNvcnJl Y3QgdGFnLg0KQWxsIGl0IHNlZW1zIHRvIG1lIHRoYXQgaXQgZG9lcyBpdCBtYWtlIG1vcmUgJ3Jh bmRvbSBhZGRyZXNzZXMnIHZhbGlkLg0KDQpDbGVhcmx5IGludGVycHJldGVycyBjYW4gc2V0IGFu ZCBjaGVjayB0aGUgaGlnaCBhZGRyZXNzIGJpdHMsIGJ1dCB0aGV5DQpjYW4gYWxzbyBtYXNrIHRo ZW0gYWZ0ZXIgdGhlIGNoZWNrcyAob3IgdXNlIHhvciB0byBmbGlwIHRoZSBiaXRzIGFuZA0KbGV0 IHRoZSBjcHUgZmF1bHQgb24gZXJyb3JzKS4NCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRk cmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBN SzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==