From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey Brodkin Subject: Re: arc_usr_cmpxchg and preemption Date: Thu, 15 Mar 2018 09:12:09 +0000 Message-ID: <1521105128.11552.64.camel@synopsys.com> References: <1521045375.11552.27.camel@synopsys.com> <20180314175352.GP4064@hirez.programming.kicks-ass.net> <1521059931.11552.51.camel@synopsys.com> <20180315081845.GS4064@hirez.programming.kicks-ass.net> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20180315081845.GS4064@hirez.programming.kicks-ass.net> Content-Language: en-US Content-ID: <5373E3962868F54486F8E6ED3D0ADF5F@internal.synopsys.com> Sender: linux-kernel-owner@vger.kernel.org To: "peterz@infradead.org" Cc: "Vineet.Gupta1@synopsys.com" , "linux-kernel@vger.kernel.org" , "linux-arch@vger.kernel.org" , "linux-snps-arc@lists.infradead.org" List-Id: linux-arch.vger.kernel.org SGkgUGV0ZXIsDQoNCk9uIFRodSwgMjAxOC0wMy0xNSBhdCAwOToxOCArMDEwMCwgUGV0ZXIgWmlq bHN0cmEgd3JvdGU6DQo+IE9uIFdlZCwgTWFyIDE0LCAyMDE4IGF0IDA4OjM4OjUzUE0gKzAwMDAs IEFsZXhleSBCcm9ka2luIHdyb3RlOg0KPiA+ID4gaW50IHN5c19jbXB4Y2hnKHUzMiBfX3VzZXIg KnVzZXJfcHRyLCB1MzIgb2xkLCB1MzIgbmV3KQ0KPiA+ID4gew0KPiA+ID4gCXUzMiB2YWw7DQo+ ID4gPiAJaW50IHJldDsNCj4gPiA+IA0KPiA+ID4gYWdhaW46DQo+ID4gPiAJcmV0ID0gMDsNCj4g PiA+IA0KPiA+ID4gCXByZWVtcHRfZGlzYWJsZSgpOw0KPiA+ID4gCXZhbCA9IGdldF91c2VyKHVz ZXJfcHRyKTsNCj4gPiA+IAlpZiAodmFsID09IG9sZCkNCj4gPiA+IAkJcmV0ID0gcHV0X3VzZXIo bmV3LCB1c2VyX3B0cik7DQo+ID4gPiAJcHJlZW1wdF9lbmFibGUoKTsNCj4gPiA+IA0KPiA+ID4g CWlmIChyZXQgPT0gLUVGQVVMVCkgew0KPiA+ID4gCQlzdHJ1Y3QgcGFnZSAqcGFnZTsNCj4gPiA+ IAkJcmV0ID0gZ2V0X3VzZXJfcGFnZXNfZmFzdCgodW5zaWduZWQgbG9uZyl1c2VyX3B0ciwgMSwg MSwgJnBhZ2UpOw0KPiA+ID4gCQlpZiAocmV0IDwgMCkNCj4gPiA+IAkJCXJldHVybiByZXQ7DQo+ ID4gPiAJCXB1dF9wYWdlKHBhZ2UpOw0KPiA+ID4gCQlnb3RvIGFnYWluOw0KPiA+IA0KPiA+IEkg Z3Vlc3MgdGhpcyBqdW1wIHdlIG5lZWQgdG8gZG8gb25seSBvbmNlLCByaWdodD8NCj4gDQo+IFR5 cGljYWxseSwgeWVzLiBJdCBpcyB0aGVvcmV0aWNhbGx5IHBvc3NpYmxlIGZvciB0aGUgcGFnZSB0 byBnZXQNCj4gcGFnZWQtb3V0IHJpZ2h0IGFmdGVyIHdlIGRvIHB1dF9wYWdlKCkgYW5kIGJlZm9y ZSB3ZSBkbyBnZXQvcHV0X3VzZXIoKSwNCj4gQnV0IGlmIHRoYXQgaGFwcGVucyB0aGUgbWFjaGlu ZSBsaWtlbHkgaGFzIGJpZ2dlciBwcm9ibGVtcyB0aGFuIGhhdmluZw0KPiB0byBkbyB0aGlzIGxv b3AgYWdhaW4uDQo+IA0KPiBGV0lXLCBsb29rIGF0IGtlcm5lbC9mdXRleC5jIGZvciB3b3JraW5n IGV4YW1wbGVzIG9mIHRoaXMgcGF0dGVybiwgdGhlDQo+IGFib3ZlIHdhcyB3cml0dGVuIHB1cmVs eSBmcm9tIG1lbW9yeSBhbmQgY291bGQgY29udGFpbiBhIGZhaWwgb3IgdHdvIDstKQ0KDQpUaGFu a3MgZm9yIHRoZSBwb2ludGVyIQ0KDQo+IEFsc28sIGl0IG1pZ2h0IG1ha2Ugc2Vuc2UgdG8gc3R1 ZmYgdGhpcyBpbXBsZW1lbnRhdGlvbiBpbiBzb21lIGxpYi8gZmlsZQ0KPiBzb21ld2hlcmUgYW5k IG1ha2UgYWxsIHBsYXRmb3JtcyB0aGF0IG5lZWQgaXQgdXNlIHRoZSBzYW1lIGNvZGUsIGFmYWlj dA0KPiB0aGVyZSByZWFsbHkgaXNuJ3QgYW55dGhpbmcgcGxhdGZvcm0gc3BlY2lmaWMgdG8gaXQu DQoNCk5vdCBjbGVhciB3aGljaCBwYXJ0IGRvIHlvdSBtZWFuIGhlcmUuDQpBcmUgeW91IHRhbGtp bmcgYWJvdXQgZW50aXJlIGNtcHhjaGcgc3lzY2FsbCBpbXBsZW1lbnRhdGlvbj8NCg0KRG8geW91 IHRoaW5rIHRoZXJlJ3JlIG1hbnkgdXNlcnMgb2YgdGhhdCBxdWl0ZSBhbiBpbmVmZmljaWVudA0K W2NvbXBhcmVkIHRvIHByb3BlciBIVyB2ZXJzaW9uXSBhdG9taWMgZXhjaGFuZ2U/DQoNCi1BbGV4 ZXk= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us01smtprelay-2.synopsys.com ([198.182.60.111]:33104 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751556AbeCOJMN (ORCPT ); Thu, 15 Mar 2018 05:12:13 -0400 From: Alexey Brodkin Subject: Re: arc_usr_cmpxchg and preemption Date: Thu, 15 Mar 2018 09:12:09 +0000 Message-ID: <1521105128.11552.64.camel@synopsys.com> References: <1521045375.11552.27.camel@synopsys.com> <20180314175352.GP4064@hirez.programming.kicks-ass.net> <1521059931.11552.51.camel@synopsys.com> <20180315081845.GS4064@hirez.programming.kicks-ass.net> In-Reply-To: <20180315081845.GS4064@hirez.programming.kicks-ass.net> Content-Language: en-US Content-Type: text/plain; charset="utf-8" Content-ID: <5373E3962868F54486F8E6ED3D0ADF5F@internal.synopsys.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: linux-arch-owner@vger.kernel.org List-ID: To: "peterz@infradead.org" Cc: "Vineet.Gupta1@synopsys.com" , "linux-kernel@vger.kernel.org" , "linux-arch@vger.kernel.org" , "linux-snps-arc@lists.infradead.org" Message-ID: <20180315091209.5bqIAr8-YMPpO3mBQZpdSIlcBdwW3XWvJbUnklj-DhI@z> SGkgUGV0ZXIsDQoNCk9uIFRodSwgMjAxOC0wMy0xNSBhdCAwOToxOCArMDEwMCwgUGV0ZXIgWmlq bHN0cmEgd3JvdGU6DQo+IE9uIFdlZCwgTWFyIDE0LCAyMDE4IGF0IDA4OjM4OjUzUE0gKzAwMDAs IEFsZXhleSBCcm9ka2luIHdyb3RlOg0KPiA+ID4gaW50IHN5c19jbXB4Y2hnKHUzMiBfX3VzZXIg KnVzZXJfcHRyLCB1MzIgb2xkLCB1MzIgbmV3KQ0KPiA+ID4gew0KPiA+ID4gCXUzMiB2YWw7DQo+ ID4gPiAJaW50IHJldDsNCj4gPiA+IA0KPiA+ID4gYWdhaW46DQo+ID4gPiAJcmV0ID0gMDsNCj4g PiA+IA0KPiA+ID4gCXByZWVtcHRfZGlzYWJsZSgpOw0KPiA+ID4gCXZhbCA9IGdldF91c2VyKHVz ZXJfcHRyKTsNCj4gPiA+IAlpZiAodmFsID09IG9sZCkNCj4gPiA+IAkJcmV0ID0gcHV0X3VzZXIo bmV3LCB1c2VyX3B0cik7DQo+ID4gPiAJcHJlZW1wdF9lbmFibGUoKTsNCj4gPiA+IA0KPiA+ID4g CWlmIChyZXQgPT0gLUVGQVVMVCkgew0KPiA+ID4gCQlzdHJ1Y3QgcGFnZSAqcGFnZTsNCj4gPiA+ IAkJcmV0ID0gZ2V0X3VzZXJfcGFnZXNfZmFzdCgodW5zaWduZWQgbG9uZyl1c2VyX3B0ciwgMSwg MSwgJnBhZ2UpOw0KPiA+ID4gCQlpZiAocmV0IDwgMCkNCj4gPiA+IAkJCXJldHVybiByZXQ7DQo+ ID4gPiAJCXB1dF9wYWdlKHBhZ2UpOw0KPiA+ID4gCQlnb3RvIGFnYWluOw0KPiA+IA0KPiA+IEkg Z3Vlc3MgdGhpcyBqdW1wIHdlIG5lZWQgdG8gZG8gb25seSBvbmNlLCByaWdodD8NCj4gDQo+IFR5 cGljYWxseSwgeWVzLiBJdCBpcyB0aGVvcmV0aWNhbGx5IHBvc3NpYmxlIGZvciB0aGUgcGFnZSB0 byBnZXQNCj4gcGFnZWQtb3V0IHJpZ2h0IGFmdGVyIHdlIGRvIHB1dF9wYWdlKCkgYW5kIGJlZm9y ZSB3ZSBkbyBnZXQvcHV0X3VzZXIoKSwNCj4gQnV0IGlmIHRoYXQgaGFwcGVucyB0aGUgbWFjaGlu ZSBsaWtlbHkgaGFzIGJpZ2dlciBwcm9ibGVtcyB0aGFuIGhhdmluZw0KPiB0byBkbyB0aGlzIGxv b3AgYWdhaW4uDQo+IA0KPiBGV0lXLCBsb29rIGF0IGtlcm5lbC9mdXRleC5jIGZvciB3b3JraW5n IGV4YW1wbGVzIG9mIHRoaXMgcGF0dGVybiwgdGhlDQo+IGFib3ZlIHdhcyB3cml0dGVuIHB1cmVs eSBmcm9tIG1lbW9yeSBhbmQgY291bGQgY29udGFpbiBhIGZhaWwgb3IgdHdvIDstKQ0KDQpUaGFu a3MgZm9yIHRoZSBwb2ludGVyIQ0KDQo+IEFsc28sIGl0IG1pZ2h0IG1ha2Ugc2Vuc2UgdG8gc3R1 ZmYgdGhpcyBpbXBsZW1lbnRhdGlvbiBpbiBzb21lIGxpYi8gZmlsZQ0KPiBzb21ld2hlcmUgYW5k IG1ha2UgYWxsIHBsYXRmb3JtcyB0aGF0IG5lZWQgaXQgdXNlIHRoZSBzYW1lIGNvZGUsIGFmYWlj dA0KPiB0aGVyZSByZWFsbHkgaXNuJ3QgYW55dGhpbmcgcGxhdGZvcm0gc3BlY2lmaWMgdG8gaXQu DQoNCk5vdCBjbGVhciB3aGljaCBwYXJ0IGRvIHlvdSBtZWFuIGhlcmUuDQpBcmUgeW91IHRhbGtp bmcgYWJvdXQgZW50aXJlIGNtcHhjaGcgc3lzY2FsbCBpbXBsZW1lbnRhdGlvbj8NCg0KRG8geW91 IHRoaW5rIHRoZXJlJ3JlIG1hbnkgdXNlcnMgb2YgdGhhdCBxdWl0ZSBhbiBpbmVmZmljaWVudA0K W2NvbXBhcmVkIHRvIHByb3BlciBIVyB2ZXJzaW9uXSBhdG9taWMgZXhjaGFuZ2U/DQoNCi1BbGV4 ZXk=