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Peter Anvin" CC: "x86@kernel.org" , "linux-kernel@vger.kernel.org" , Andrew Morton , "Signed-off-by : Qiaowei Ren" Subject: RE: [PATCH 2/2] x86: fix __user annotations Thread-Topic: [PATCH 2/2] x86: fix __user annotations Thread-Index: AQHU5ayoMjJz+KWSR0ebfYs0pJiIL6YnZLxQ Date: Mon, 1 Apr 2019 14:37:23 +0000 Message-ID: References: <20190328212321.92463-1-jannh@google.com> <20190328212321.92463-2-jannh@google.com> In-Reply-To: <20190328212321.92463-2-jannh@google.com> 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-MC-Unique: dWEfmz4fNiaWXGzbiijT8A-1 X-Mimecast-Spam-Score: 0 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 RnJvbTogSmFubiBIb3JuDQo+IFNlbnQ6IDI4IE1hcmNoIDIwMTkgMjE6MjMNCj4gRml4IF9fdXNl ciBhbm5vdGF0aW9ucyBpbiB2YXJpb3VzIHBsYWNlcyBhY3Jvc3MgdGhlIHg4NiB0cmVlOg0KPiAN Ci4uLg0KPiAgLSBnZW5lcmljX2xvYWRfbWljcm9jb2RlKCkgZGVhbHMgd2l0aCBhIHBvaW50ZXIg dGhhdCBjYW4gYmUgZWl0aGVyIGENCj4gICAga2VybmVsIHBvaW50ZXIgb3IgYSB1c2VyIHBvaW50 ZXI7IGNoYW5nZSB0aGUgY29kZSB0byBwYXNzIGl0IGFyb3VuZCBhcw0KPiAgICBhIF9fdXNlciBw b2ludGVyLCBhbmQgYWRkIGV4cGxpY2l0IGNhc3RzIHRvIGNvbnZlcnQgYmV0d2VlbiBfX3VzZXIg YW5kDQo+ICAgIF9fa2VybmVsDQouLi4NCj4gLXN0YXRpYyBpbnQgZ2V0X3Vjb2RlX2Z3KHZvaWQg KnRvLCBjb25zdCB2b2lkICpmcm9tLCBzaXplX3QgbikNCj4gK3N0YXRpYyBpbnQgZ2V0X3Vjb2Rl X2Z3KHZvaWQgKnRvLCBjb25zdCB2b2lkIF9fdXNlciAqZnJvbSwgc2l6ZV90IG4pDQo+ICB7DQo+ IC0JbWVtY3B5KHRvLCBmcm9tLCBuKTsNCj4gKwkvKiBjYXN0IHBhaXJlZCB3aXRoIHJlcXVlc3Rf bWljcm9jb2RlX2Z3KCkgKi8NCj4gKwltZW1jcHkodG8sIChjb25zdCB2b2lkIF9fZm9yY2UgKilm cm9tLCBuKTsNCj4gIAlyZXR1cm4gMDsNCj4gIH0NCj4gDQo+IEBAIC05OTMsNyArOTk2LDggQEAg c3RhdGljIGVudW0gdWNvZGVfc3RhdGUgcmVxdWVzdF9taWNyb2NvZGVfZncoaW50IGNwdSwgc3Ry dWN0IGRldmljZSAqZGV2aWNlLA0KPiAgCQlyZXR1cm4gVUNPREVfTkZPVU5EOw0KPiAgCX0NCj4g DQo+IC0JcmV0ID0gZ2VuZXJpY19sb2FkX21pY3JvY29kZShjcHUsICh2b2lkICopZmlybXdhcmUt PmRhdGEsDQo+ICsJLyogY2FzdCBwYWlyZWQgd2l0aCBnZXRfdWNvZGVfZncoKSAqLw0KPiArCXJl dCA9IGdlbmVyaWNfbG9hZF9taWNyb2NvZGUoY3B1LCAodm9pZCBfX2ZvcmNlIF9fdXNlciAqKWZp cm13YXJlLT5kYXRhLA0KPiAgCQkJCSAgICAgZmlybXdhcmUtPnNpemUsICZnZXRfdWNvZGVfZncp Ow0KPiANCj4gIAlyZWxlYXNlX2Zpcm13YXJlKGZpcm13YXJlKTsNCj4gQEAgLTEwMDEsNyArMTAw NSw3IEBAIHN0YXRpYyBlbnVtIHVjb2RlX3N0YXRlIHJlcXVlc3RfbWljcm9jb2RlX2Z3KGludCBj cHUsIHN0cnVjdCBkZXZpY2UgKmRldmljZSwNCj4gIAlyZXR1cm4gcmV0Ow0KPiAgfQ0KPiANCj4g LXN0YXRpYyBpbnQgZ2V0X3Vjb2RlX3VzZXIodm9pZCAqdG8sIGNvbnN0IHZvaWQgKmZyb20sIHNp emVfdCBuKQ0KPiArc3RhdGljIGludCBnZXRfdWNvZGVfdXNlcih2b2lkICp0bywgY29uc3Qgdm9p ZCBfX3VzZXIgKmZyb20sIHNpemVfdCBuKQ0KPiAgew0KPiAgCXJldHVybiBjb3B5X2Zyb21fdXNl cih0bywgZnJvbSwgbik7DQo+ICB9DQo+IEBAIC0xMDEyLDcgKzEwMTYsNyBAQCByZXF1ZXN0X21p Y3JvY29kZV91c2VyKGludCBjcHUsIGNvbnN0IHZvaWQgX191c2VyICpidWYsIHNpemVfdCBzaXpl KQ0KPiAgCWlmIChpc19ibGFja2xpc3RlZChjcHUpKQ0KPiAgCQlyZXR1cm4gVUNPREVfTkZPVU5E Ow0KPiANCj4gLQlyZXR1cm4gZ2VuZXJpY19sb2FkX21pY3JvY29kZShjcHUsICh2b2lkICopYnVm LCBzaXplLCAmZ2V0X3Vjb2RlX3VzZXIpOw0KPiArCXJldHVybiBnZW5lcmljX2xvYWRfbWljcm9j b2RlKGNwdSwgYnVmLCBzaXplLCAmZ2V0X3Vjb2RlX3VzZXIpOw0KDQpUaGF0IGlzIGFsbCBhbiAn YWNjaWRlbnQgd2FpdGluZyB0byBoYXBwZW4nIC4uLg0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJl ZCBBZGRyZXNzIExha2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXlu ZXMsIE1LMSAxUFQsIFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K