From mboxrd@z Thu Jan 1 00:00:00 1970 From: "=?utf-8?B?6ZmI5Y2O5omN?=" Subject: Re: [PATCH V6 1/3] dma-mapping: Introduce device_is_coherent() as ahelper Date: Fri, 22 Sep 2017 10:13:50 +0800 Message-ID: References: <1505811161-25246-1-git-send-email-chenhc@lemote.com> <5e792b21-1d63-9200-b36a-c423385e2a2e@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <5e792b21-1d63-9200-b36a-c423385e2a2e@arm.com> Sender: stable-owner@vger.kernel.org To: =?utf-8?B?Um9iaW4gTXVycGh5?= , =?utf-8?B?Q2hyaXN0b3BoIEhlbGx3aWc=?= Cc: =?utf-8?B?TWFyZWsgU3p5cHJvd3NraQ==?= , =?utf-8?B?QW5kcmV3IE1vcnRvbg==?= , =?utf-8?B?RnV4aW4gWmhhbmc=?= , =?utf-8?B?bGludXgta2VybmVs?= , =?utf-8?B?SmFtZXMgRSAuIEogLiBCb3R0b21sZXk=?= , =?utf-8?B?TWFydGluIEsgLiBQZXRlcnNlbg==?= , =?utf-8?B?bGludXgtc2NzaQ==?= , =?utf-8?B?c3RhYmxl?= List-Id: linux-scsi@vger.kernel.org SGksIFJvYmluLA0KDQpCZWZvcmUgMi42LjM2IGRtYV9nZXRfY2FjaGVfYWxpZ25tZW50IGlz IGFyY2gtZGVwZW5kZW50LCBhbmQgaXQgaXMgdW5pZmllZCBpbiBjb21taXQgNDU2NWYwMTcw ZGZjODQ5YjM2MjljMjdkNyAoImRtYS1tYXBwaW5nOiB1bmlmeSBkbWFfZ2V0X2NhY2hlX2Fs aWdubWVudCBpbXBsZW1lbnRhdGlvbnMiKS4gU2hvdWxkIHdlIHJldmVydCB0byB0aGUgb2xk IGltcGxlbWVudGF0aW9uPw0KIA0KSHVhY2FpDQogDQotLS0tLS0tLS0tLS0tLS0tLS0gT3Jp Z2luYWwgLS0tLS0tLS0tLS0tLS0tLS0tDQpGcm9tOiAgIlJvYmluIE11cnBoeSI8cm9iaW4u bXVycGh5QGFybS5jb20+Ow0KRGF0ZTogIFRodSwgU2VwIDIxLCAyMDE3IDA2OjQ3IFBNDQpU bzogICJIdWFjYWkgQ2hlbiI8Y2hlbmhjQGxlbW90ZS5jb20+OyAiQ2hyaXN0b3BoIEhlbGx3 aWciPGhjaEBsc3QuZGU+OyANCkNjOiAgIk1hcmVrIFN6eXByb3dza2kiPG0uc3p5cHJvd3Nr aUBzYW1zdW5nLmNvbT47ICJBbmRyZXcgTW9ydG9uIjxha3BtQGxpbnV4LWZvdW5kYXRpb24u b3JnPjsgIkZ1eGluIFpoYW5nIjx6aGFuZ2Z4QGxlbW90ZS5jb20+OyAibGludXgta2VybmVs IjxsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnPjsgIkphbWVzIEUgLiBKIC4gQm90dG9t bGV5IjxqZWpiQGxpbnV4LnZuZXQuaWJtLmNvbT47ICJNYXJ0aW4gSyAuIFBldGVyc2VuIjxt YXJ0aW4ucGV0ZXJzZW5Ab3JhY2xlLmNvbT47ICJsaW51eC1zY3NpIjxsaW51eC1zY3NpQHZn ZXIua2VybmVsLm9yZz47ICJzdGFibGUiPHN0YWJsZUB2Z2VyLmtlcm5lbC5vcmc+OyANClN1 YmplY3Q6ICBSZTogW1BBVENIIFY2IDEvM10gZG1hLW1hcHBpbmc6IEludHJvZHVjZSBkZXZp Y2VfaXNfY29oZXJlbnQoKSBhcyBhaGVscGVyDQoNCiANCk9uIDE5LzA5LzE3IDA5OjUyLCBI dWFjYWkgQ2hlbiB3cm90ZToNCj4gV2Ugd2lsbCB1c2UgZGV2aWNlX2lzX2NvaGVyZW50KCkg YXMgYSBoZWxwZXIgZnVuY3Rpb24sIHdoaWNoIHdpbGwgYmUNCj4gdXNlZCBpbiB0aGUgbmV4 dCBwYXRjaC4NCj4gDQo+IFRoZXJlIGlzIGEgTUlQUy1zcGVjaWZpYyBwbGF0X2RldmljZV9p c19jb2hlcmVudCgpLCBidXQgd2UgbmVlZCBhIG1vcmUNCj4gZ2VuZXJpYyBzb2x1dGlvbiwg c28gYWRkIGFuZCB1c2UgYSBuZXcgZnVuY3Rpb24gcG9pbnRlciBpbiBkbWFfbWFwX29wcy4N Cg0KSSB0aGluayB3ZSdyZSBoZWFkaW5nIGluIHRoZSByaWdodCBkaXJlY3Rpb24gd2l0aCB0 aGUgc2VyaWVzLCBidXQgSQ0Kc3RpbGwgZG9uJ3QgbGlrZSB0aGlzIHBhdGNoLiBJIGNhbiBw cmV0dHkgbXVjaCBndWFyYW50ZWUgdGhhdCBkcml2ZXINCmF1dGhvcnMgKndpbGwqIGFidXNl IGEgZ2VuZXJpYyBkZXZpY2VfaXNfY29oZXJlbnQoKSBBUEkgdG8gbWVhbiAiSSBjYW4NCnNr aXAgb3RoZXIgRE1BIEFQSSBjYWxscyBhbmQganVzdCB1c2UgdmlydF90b19waHlzKCkiLg0K DQpJIHRoaW5rIGl0IHdvdWxkIGJlIGZhciBiZXR0ZXIgdG8gYWxsb3cgYXJjaGl0ZWN0dXJl cyB0byBwcm92aWRlIHRoZWlyDQpvd24gb3ZlcnJpZGUgb2YgZG1hX2dldF9jYWNoZV9hbGln bm1lbnQoKSwgYW5kIGxldCB0aGUgY29oZXJlbmN5IGRldGFpbA0KcmVtYWluIGludGVybmFs IHRvIHRoZSByZWxldmFudCBhcmNoIGltcGxlbWVudGF0aW9ucy4NCg0KWy4uLl0NCj4gQEAg LTY5Nyw2ICs2OTgsMTUgQEAgc3RhdGljIGlubGluZSB2b2lkICpkbWFfemFsbG9jX2NvaGVy ZW50KHN0cnVjdCBkZXZpY2UgKmRldiwgc2l6ZV90IHNpemUsDQo+ICB9DQo+ICANCj4gICNp ZmRlZiBDT05GSUdfSEFTX0RNQQ0KPiArc3RhdGljIGlubGluZSBpbnQgZGV2aWNlX2lzX2Nv aGVyZW50KHN0cnVjdCBkZXZpY2UgKmRldikNCj4gK3sNCj4gKwljb25zdCBzdHJ1Y3QgZG1h X21hcF9vcHMgKm9wcyA9IGdldF9kbWFfb3BzKGRldik7DQo+ICsJaWYgKG9wcyAmJiBvcHMt PmRldmljZV9pc19jb2hlcmVudCkNCj4gKwkJcmV0dXJuIG9wcy0+ZGV2aWNlX2lzX2NvaGVy ZW50KGRldik7DQo+ICsJZWxzZQ0KPiArCQlyZXR1cm4gMTsgICAgLyogY29tcGF0aWJsZSBi ZWhhdmlvciAqLw0KDQpUaGF0IGlzIGFsc28gcXVpdGUgc2NhcnkgLSBpZiBzb21lb25lIG5v dyBhZGRzIGEgbmV3DQpkbWFfZ2V0X2NhY2hlX2FsaWduZW1udCgpIGNhbGwgYW5kIGR1dGlm dWxseSBwYXNzZXMgYSBub24tTlVMTCBkZXZpY2UsDQp0aGV5IHdpbGwgbm93IGdldCBiYWNr IGFuIGFsaWdubWVudCBvZiAxIG9uIGFsbCBub24tY29oZXJlbnQgcGxhdGZvcm1zDQpleGNl cHQgTUlQUzogaGVsbG8gZGF0YSBjb3JydXB0aW9uLg0KDQpSb2Jpbi4NCg0KPiArfQ0KPiAr DQo+ICBzdGF0aWMgaW5saW5lIGludCBkbWFfZ2V0X2NhY2hlX2FsaWdubWVudCh2b2lkKQ0K PiAgew0KPiAgI2lmZGVmIEFSQ0hfRE1BX01JTkFMSUdODQo+