From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.86.151]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 588EB5394 for ; Fri, 18 Mar 2022 22:43:17 +0000 (UTC) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-401-Kl5n9Y8SM8efMVGPAvZzlQ-1; Fri, 18 Mar 2022 22:43:14 +0000 X-MC-Unique: Kl5n9Y8SM8efMVGPAvZzlQ-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.32; Fri, 18 Mar 2022 22:43:13 +0000 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.033; Fri, 18 Mar 2022 22:43:13 +0000 From: David Laight To: 'Linus Torvalds' , Andy Lutomirski CC: Andrew Cooper , Nick Desaulniers , "H. Peter Anvin" , Bill Wendling , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , Nathan Chancellor , "Juergen Gross" , Peter Zijlstra , "llvm@lists.linux.dev" , LKML , linux-toolchains Subject: RE: [PATCH v5] x86: use builtins to read eflags Thread-Topic: [PATCH v5] x86: use builtins to read eflags Thread-Index: AQHYOvTFBe9clLf+8ESM+1cEdgpAzqzFu3kw Date: Fri, 18 Mar 2022 22:43:13 +0000 Message-ID: <5794cceec50a4f1ebca069d5a31afcdf@AcuMS.aculab.com> References: <20220210223134.233757-1-morbo@google.com> <20220301201903.4113977-1-morbo@google.com> <83b33afc-8502-0065-60bc-3a91528632d8@kernel.org> 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] Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: 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 RnJvbTogTGludXMgVG9ydmFsZHMNCj4gU2VudDogMTggTWFyY2ggMjAyMiAxODoxOQ0KPiANCj4g T24gRnJpLCBNYXIgMTgsIDIwMjIgYXQgMTA6NTkgQU0gQW5keSBMdXRvbWlyc2tpIDxsdXRvQGtl cm5lbC5vcmc+IHdyb3RlOg0KPiA+DQo+ID4gSSBnZW5lcmFsbHkgYWdyZWUuICBJbiB0aGlzIHBh cnRpY3VsYXIgY2FzZSwgdGhvdWdoLCBJIHdpbGwga2VlcCB1c2luZw0KPiA+IHRoZSBidWlsdGlu IGluIHRvb2xzL3Rlc3Rpbmcvc2VsZnRlc3RzL3g4Ni9oZWxwZXJzLmggdW5sZXNzIHdlIGFjdHVh bGx5DQo+ID4gaGl0IGJyZWFrYWdlLiAgVGhpcyBpcyBiZWNhdXNlIHRoaXMgaXMgKnVzZXIqIGNv ZGUsIGl0IGlzIGNvbXBpbGVkIHdpdGgNCj4gPiB0aGUgcmVkem9uZSBlbmFibGVkLCBhbmQgdGhl IGFzbSBjb2RlIHRvIGRvIHRoZSByaWdodCB0aGluZyB3aGVuIHRoZQ0KPiA+IHJlZHpvbmUgaXMg ZW5hYmxlZCBpcyB0b28gaGFpcnkgZm9yIG1lIHRvIHdhbnQgdG8gZGVhbCB3aXRoIGl0Lg0KPiAN Cj4gWWVhaCwgcmVkem9uaW5nIGlzIGEgcHJvYmxlbSBmb3IgInB1c2hmIi4NCj4gDQo+IE9yIHJh dGhlciwgaXQncyBub3QgdGhlIHJlZHpvbmluZyBpdHNlbGYsIGJ1dCB0aGUgZmFjdCB0aGF0IHRo ZQ0KPiBjb21waWxlciBtaWdodCB1c2UgdGhlIHdvcmQgdW5kZXIgdGhlIHN0YWNrIGZvciByYW5k b20gb3RoZXIgdGhpbmdzLA0KPiBhbmQgdGhlIHB1c2hmIHdpbGwgdGhlbiBjb3JydXB0IHNvbWUg bG9jYWwgdmFyaWFibGUgc3RvcmFnZS4NCj4gDQo+IEkgdGhpbmsgaXQgd291bGQgYmUgbG92ZWx5 IHRvIHNvbHZlIHRoYXQgaW4gaW5saW5lIGFzbSBpdHNlbGYgc29tZSB3YXkNCj4gLSBieSBtYXJr aW5nIHRoZSBzdGFjayBwb2ludGVyIGNsb2JiZXJlZCBvciBzb21ldGhpbmcuDQoNClNvbWV0aGlu ZyB0aGF0IGdlbmVyYXRlczoNCgltb3YJJXJheCwtOCglcnNwKQ0KCXB1c2hmDQoJeGNoZwklcmF4 LDAoJXJzcCkNCglhZGQJJXJzcCw4DQpzaG91bGQgd29yayB3aXRoIG9yIHdpdGhvdXQgYSByZWR6 b25lLg0KV2lsbCBiZSBhIGJpdCBzbG93ZXIgOi0oDQoNCglEYXZpZA0KDQotDQpSZWdpc3RlcmVk IEFkZHJlc3MgTGFrZXNpZGUsIEJyYW1sZXkgUm9hZCwgTW91bnQgRmFybSwgTWlsdG9uIEtleW5l cywgTUsxIDFQVCwgVUsNClJlZ2lzdHJhdGlvbiBObzogMTM5NzM4NiAoV2FsZXMpDQo=