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Thu, 2 Aug 2018 09:08:49 +0200 From: Alexey Brodkin To: Vineet Gupta CC: "linux-kernel@vger.kernel.org" , "linux-snps-arc@lists.infradead.org" Subject: Re: [PATCH] ARC: Improve handling of fatal signals in do_page_fault() Thread-Topic: [PATCH] ARC: Improve handling of fatal signals in do_page_fault() Thread-Index: AQHUD9XQgYH1u9RF+UG15MGoFlKsxaSrYFwAgAC9wYA= Date: Thu, 2 Aug 2018 07:08:49 +0000 Message-ID: <3760e66a23a8ec1c1eb4ad0aaaed06c9d31a3f4f.camel@synopsys.com> References: <20180629182005.10243-1-abrodkin@synopsys.com> <432f2efe-e7cd-7bf1-40f5-f35f8954f224@synopsys.com> In-Reply-To: <432f2efe-e7cd-7bf1-40f5-f35f8954f224@synopsys.com> Accept-Language: en-US, ru-RU Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.121.8.87] Content-Type: text/plain; charset="utf-8" Content-ID: <8446AF2636A35C4FA402C10FA50EC595@internal.synopsys.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org SGkgVmluZWV0LA0KDQpPbiBXZWQsIDIwMTgtMDgtMDEgYXQgMTI6NDkgLTA3MDAsIFZpbmVldCBH dXB0YSB3cm90ZToNCj4gSGkgQWxleGV5LA0KPiANCj4gSSB3YXMgZmluYWxseSBmb3JjZWQgdG8g cmV2aXNpdCB0aGlzIGZvciBteSBnbGliYyB0c3QtdGxzMy1tYWxsb2MgZGVhZGxvY2suIEFuZA0K PiBpbmRlZWQgd2l0aCB0aGlzIGNoYW5nZSB3ZSBkb24ndHNlZSB0aGUgZGVhZGxvY2suIEJ1dCBz ZWUgYmVsb3cuLg0KPiANCj4gDQo+ID4gQEAgLTEzOSwxMiArMTM5LDE2IEBAIHZvaWQgZG9fcGFn ZV9mYXVsdCh1bnNpZ25lZCBsb25nIGFkZHJlc3MsIHN0cnVjdCBwdF9yZWdzICpyZWdzKQ0KPiA+ ICAJICovDQo+ID4gIAlmYXVsdCA9IGhhbmRsZV9tbV9mYXVsdCh2bWEsIGFkZHJlc3MsIGZsYWdz KTsNCj4gPiAgDQo+ID4gLQkvKiBJZiBQYWdlZmF1bHQgd2FzIGludGVycnVwdGVkIGJ5IFNJR0tJ TEwsIGV4aXQgcGFnZSBmYXVsdCAiZWFybHkiICovDQo+ID4gKwkvKiBJZiB3ZSBuZWVkIHRvIHJl dHJ5IGJ1dCBhIGZhdGFsIHNpZ25hbCBpcyBwZW5kaW5nLCBoYW5kbGUgdGhlDQo+ID4gKwkgKiBz aWduYWwgZmlyc3QuIFdlIGRvIG5vdCBuZWVkIHRvIHJlbGVhc2UgdGhlIG1tYXBfc2VtIGJlY2F1 c2UNCj4gPiArCSAqIGl0IHdvdWxkIGFscmVhZHkgYmUgcmVsZWFzZWQgaW4gX19sb2NrX3BhZ2Vf b3JfcmV0cnkgaW4NCj4gPiArCSAqIG1tL2ZpbGVtYXAuYy4gKi8NCj4gDQo+IFJpZ2h0IGFuZCB3 ZSB3ZXJlIGFscmVhZHkgZG9pbmcgdGhhdDogdXBfcmVhZCgpIHdhcyBjYWxsZWQgZm9yICFWTV9G QVVMVF9SRVRSWQ0KPiBtZWFuaW5nIHdlIHJlbGllZCBvbiB0aGUgY29yZSBtbSB0byBkbyB0aGF0 IGFscmVhZHkgZm9yIFZNX0ZBVUxUX1JFVFJZIGNhc2UuDQo+IA0KPiBUaGUgaXNzdWUgaGVyZSB3 YXMgYWRkaXRpb25hbCBjaGVjayBmb3IgVk1fRkFVTFRfRVJST1IuIFR5cGljYWxseSB0aGlzIGlz IG5vdCBzZXQNCj4gYnkgaGFuZGxlX21tX2ZhdWx0KCkgbWVhbmluZyBmb3IgY29tbW9uIHVzZXIg ZmF1bHRzIHdpdGggc2lnbmFsIHBlbmRpbmcsIHdlIHdlcmUNCj4gbm90IGNhbGxpbmcgdXBfcmVh ZCwgaGVuY2UgdGhlIGVuc3VpbmcgZGVhZGxvY2suDQoNClJpZ2h0Lg0KDQo+ID4gIAlpZiAodW5s aWtlbHkoZmF0YWxfc2lnbmFsX3BlbmRpbmcoY3VycmVudCkpKSB7DQo+ID4gLQkJaWYgKChmYXVs dCAmIFZNX0ZBVUxUX0VSUk9SKSAmJiAhKGZhdWx0ICYgVk1fRkFVTFRfUkVUUlkpKQ0KPiA+IC0J CQl1cF9yZWFkKCZtbS0+bW1hcF9zZW0pOw0KPiA+IC0JCWlmICh1c2VyX21vZGUocmVncykpDQo+ ID4gKwkJaWYgKGZhdWx0ICYgVk1fRkFVTFRfUkVUUlkpIHsNCj4gPiArCQkJaWYgKCF1c2VyX21v ZGUocmVncykpDQo+ID4gKwkJCQlnb3RvIG5vX2NvbnRleHQ7DQo+IA0KPiBHaXZlbiB0aGlzIGNv ZGUgaXMgcmVhbGx5IHRyaWNreSwgbGV0cyBvbmx5IHNvbHZlIG9uZSBwcm9ibGVtIHdpdGggMSBv bmUgcGF0Y2guDQoNCkFncmVlLg0KDQo+ID4gIAkJCXJldHVybjsNCj4gPiArCQl9DQo+ID4gIAl9 DQo+IA0KPiBUaGUgZmF1bHQgaGFuZGxpbmcgaXMgc3BhZ2hldHRpIG1lc3Mgb2YgY2hlY2tzIGFu ZCBtb3JlIGNoZWNrcyBhbmQgaGFzIG5vdCByZWFsbHkNCj4gYmVlbiB0b3VjaGVkIHNpbmNlIHVw c3RyZWFtaW5nLiBJIG5lZWQgdG8gY2xlYW4gaXQgdXAgYW5kIGVzc2VudGlhbGx5IHJld3JpdGUg aXQNCj4gZm9yIHY0LjE5DQoNClNvIHdvdWxkIHlvdSBsaWtlIG1lIHRvIHNlbmQgYSByZS1zcGlu IHdpdGggbGVzcyBjaGFuZ2VzIGFzIGRpc2N1c3NlZCBhYm92ZSBzbw0Kd2UgaGF2ZSBzb21ldGhp bmcgYmV0dGVyIGZvciBub3cgYW5kIGZvciBiYWNrLXBvcnRpbmcgdG8gc3RhYmxlIGJyYW5jaGVz Lg0KDQpPciB5b3UncmUgZ29pbmcgdG8gcmV3cml0ZSBhbGwgdGhhdCBzb21ldGltZSBzb29uIHlv dXJzZWxmPw0KDQotQWxleGV5DQo=