From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0223C56202 for ; Fri, 20 Nov 2020 20:00:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 468682240B for ; Fri, 20 Nov 2020 20:00:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729662AbgKTUAK (ORCPT ); Fri, 20 Nov 2020 15:00:10 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.86.151]:36766 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729012AbgKTUAK (ORCPT ); Fri, 20 Nov 2020 15:00:10 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-57-DKzvyGEWO86tzjNp9HgpTA-1; Fri, 20 Nov 2020 20:00:06 +0000 X-MC-Unique: DKzvyGEWO86tzjNp9HgpTA-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Fri, 20 Nov 2020 20:00:05 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Fri, 20 Nov 2020 20:00:05 +0000 From: David Laight To: 'Johan Hovold' , "tiantao (H)" , Thomas Gleixner CC: Tian Tao , "gregkh@linuxfoundation.org" , "jirislaby@kernel.org" , "afaerber@suse.de" , "manivannan.sadhasivam@linaro.org" , "linux-serial@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH] tty: serial: replace spin_lock_irqsave by spin_lock in hard IRQ Thread-Topic: [PATCH] tty: serial: replace spin_lock_irqsave by spin_lock in hard IRQ Thread-Index: AQHWvzvedNBRKBahtEqDJHaWmtJ6SqnRaVoQ Date: Fri, 20 Nov 2020 20:00:05 +0000 Message-ID: <40a52ea2273146b98b3ae3439a22d1eb@AcuMS.aculab.com> References: <1605776489-16283-1-git-send-email-tiantao6@hisilicon.com> <9ce93d7b-f769-58ed-e6bf-95c34bd0123e@huawei.com> 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 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com 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 RnJvbTogSm9oYW4gSG92b2xkDQo+IFNlbnQ6IDIwIE5vdmVtYmVyIDIwMjAgMTI6NTANCj4gDQo+ IE9uIEZyaSwgTm92IDIwLCAyMDIwIGF0IDA3OjI1OjAzUE0gKzA4MDAsIHRpYW50YW8gKEgpIHdy b3RlOg0KPiA+IOWcqCAyMDIwLzExLzIwIDE2OjIzLCBKb2hhbiBIb3ZvbGQg5YaZ6YGTOg0KPiA+ ID4gT24gVGh1LCBOb3YgMTksIDIwMjAgYXQgMDU6MDE6MjlQTSArMDgwMCwgVGlhbiBUYW8gd3Jv dGU6DQo+ID4gPj4gVGhlIGNvZGUgaGFzIGJlZW4gaW4gYSBpcnEtZGlzYWJsZWQgY29udGV4dCBz aW5jZSBpdCBpcyBoYXJkIElSUS4gVGhlcmUNCj4gPiA+PiBpcyBubyBuZWNlc3NpdHkgdG8gZG8g aXQgYWdhaW4uDQo+ID4gPj4NCj4gPiA+PiBTaWduZWQtb2ZmLWJ5OiBUaWFuIFRhbyA8dGlhbnRh bzZAaGlzaWxpY29uLmNvbT4NCj4gPiA+PiAtLS0NCj4gPiA+PiAgIGRyaXZlcnMvdHR5L3Nlcmlh bC9vd2wtdWFydC5jIHwgNSArKy0tLQ0KPiA+ID4+ICAgMSBmaWxlIGNoYW5nZWQsIDIgaW5zZXJ0 aW9ucygrKSwgMyBkZWxldGlvbnMoLSkNCj4gPiA+Pg0KPiA+ID4+IGRpZmYgLS1naXQgYS9kcml2 ZXJzL3R0eS9zZXJpYWwvb3dsLXVhcnQuYyBiL2RyaXZlcnMvdHR5L3NlcmlhbC9vd2wtdWFydC5j DQo+ID4gPj4gaW5kZXggYzE0OWY4YzMuLjQ3MmZkYWYgMTAwNjQ0DQo+ID4gPj4gLS0tIGEvZHJp dmVycy90dHkvc2VyaWFsL293bC11YXJ0LmMNCj4gPiA+PiArKysgYi9kcml2ZXJzL3R0eS9zZXJp YWwvb3dsLXVhcnQuYw0KPiA+ID4+IEBAIC0yNTEsMTAgKzI1MSw5IEBAIHN0YXRpYyB2b2lkIG93 bF91YXJ0X3JlY2VpdmVfY2hhcnMoc3RydWN0IHVhcnRfcG9ydCAqcG9ydCkNCj4gPiA+PiAgIHN0 YXRpYyBpcnFyZXR1cm5fdCBvd2xfdWFydF9pcnEoaW50IGlycSwgdm9pZCAqZGV2X2lkKQ0KPiA+ ID4+ICAgew0KPiA+ID4+ICAgCXN0cnVjdCB1YXJ0X3BvcnQgKnBvcnQgPSBkZXZfaWQ7DQo+ID4g Pj4gLQl1bnNpZ25lZCBsb25nIGZsYWdzOw0KPiA+ID4+ICAgCXUzMiBzdGF0Ow0KPiA+ID4+DQo+ ID4gPj4gLQlzcGluX2xvY2tfaXJxc2F2ZSgmcG9ydC0+bG9jaywgZmxhZ3MpOw0KPiA+ID4+ICsJ c3Bpbl9sb2NrKCZwb3J0LT5sb2NrKTsNCj4gPiA+DQo+ID4gPiBTYW1lIHRoaW5nIGhlcmU7IHRo aXMgd2lsbCBicmVhayB3aXRoIGZvcmNlZCBpcnEgdGhyZWFkaW5nIChpLmUuDQo+ID4gPiAidGhy ZWFkaXJxcyIpIHNpbmNlIHRoZSBjb25zb2xlIGNvZGUgY2FuIHN0aWxsIGVuZCB1cCBiZWluZyBj YWxsZWQgZnJvbQ0KPiA+ID4gaW50ZXJydXB0IGNvbnRleHQuDQo+IA0KPiA+IEFzIHRoZSBmb2xs b3dpbmcgY29kZSBzaG93cywgb3dsX3VhcnRfaXJxIGRvZXMgbm90IHJ1biBpbiB0aGUgaXJxDQo+ ID4gdGhyZWFkaW5nIGNvbnRleHQuDQo+ID4gICByZXQgPSByZXF1ZXN0X2lycShwb3J0LT5pcnEs IG93bF91YXJ0X2lycSwgSVJRRl9UUklHR0VSX0hJR0gsDQo+ID4gICAgICAgICAgICAgICAgICAg ICAgICAgICJvd2wtdWFydCIsIHBvcnQpOw0KPiA+ICAgICAgICAgIGlmIChyZXQpDQo+ID4gICAg ICAgICAgICAgICAgICByZXR1cm4gcmV0Ow0KPiANCj4gSXQgc3RpbGwgcnVucyBpbiBhIHRocmVh ZCB3aGVuIGludGVycnVwdHMgYXJlIGZvcmNlZCB0byBiZSB0aHJlYWRlZA0KPiB1c2luZyB0aGUg a2VybmVsIHBhcmFtZXRlciAidGhyZWFkaXJxcyIuDQo+IA0KPiBXZSBqdXN0IGhhZCBhIHJldmVy dCBvZiBhIGNoYW5nZSBsaWtlIHlvdXJzIGFmdGVyIGxvY2tkZXAgcmVwb3J0ZWQgdGhlDQo+IHJl c3VsdGluZyBsb2NrIGludmVyc2lvbiB3aXRoIGZvcmNlZCBpbnRlcnJ1cHQgdGhyZWFkaW5nLg0K PiANCj4gV2hldGhlciBkcml2ZXJzIHNob3VsZCBoYXZlIHRvIGNhcmUgYWJvdXQgInRocmVhZGly cXMiIGlzIGEgc29tZXdoYXQNCj4gZGlmZmVyZW50IHF1ZXN0aW9uLiBOb3Qgc3VyZSBob3cgdGhh dCdzIGV2ZW4gc3VwcG9zZWQgdG8gd29yayBnZW5lcmFsbHkNCj4gdW5sZXNzIHdlIG1hc3MtY29u dmVydCBkcml2ZXJzIHRvIHNwaW5fbG9ja19pcnFzYXZlKCkgKG9yIG1hcmsgdGhlaXINCj4gaW50 ZXJydXB0cyBJUlFGX05PX1RIUkVBRCkuDQoNCklzbid0IHRoYXQgYmFja3dhcmRzPw0KDQpZb3Ug bmVlZCB0byB1c2UgdGhlICdpcnFzYXZlJyB2YXJpYW50IGluIGNvZGUgdGhhdCBtaWdodCBydW4g d2l0aA0KaW50ZXJydXB0cyBlbmFibGVkIGJlY2F1c2UgYW4gaW50ZXJydXB0IG1pZ2h0IHRyeSB0 byBhY3F1aXJlIHRoZQ0Kc2FtZSBsb2NrIGhhdmluZyBpbnRlcnJ1cHRlZCB0aGUgY29kZSB0aGF0 IGFscmVhZHkgaG9sZHMgdGhlIGxvY2suDQoNCklmIGludGVycnVwdHMgcnVuIGFzIHNlcGFyYXRl IHRocmVhZHMgdGhhdCBjYW4gbmV2ZXIgaGFwcGVuLg0KU28gaW4gdGhhdCBjYXNlIGFsbCBjb2Rl IGNhbiB1c2UgdGhlIG5vbi1pcnFzYXZlIGNhbGwuDQoNClNvIGVpdGhlciBsb2NrZGVwIGlzIGJy b2tlbiBvciB5b3UgaGF2ZSBhIGRpZmZlcmVudCBidWcuDQoNCk9UT0ggdGhlIGFkZGl0aW9uYWwg Y29zdCBvZiB1c2luZyB0aGUgJ2lycXNhdmUnIGZvcm0gaW5zaWRlDQphbiBJU1IgaXMgcHJvYmFi bHkgbWluaW1hbC4NClNvIHdoaWxlIG5vdCBuZWNlc3NhcnkgaXQgZG9lcyBubyBoYXJtIGFuZCBz YXZlcyB0aGUgcmVhZGVyDQpoYXZpbmcgdG8gd29ycnkgYWJvdXQgd2hldGhlciBhIHBhcnRpY3Vs YXIgZnVuY3Rpb24gbWlnaHQNCmJlIGNhbGxlZCBmcm9tIGFuIElTUi4NCg0KCURhdmlkDQoNCi0N ClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBN aWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxl cykNCg==