From nobody Thu Sep 11 16:47:05 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C864FCD13D3 for ; Mon, 18 Sep 2023 08:22:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240642AbjIRIWi convert rfc822-to-8bit (ORCPT ); Mon, 18 Sep 2023 04:22:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33488 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241246AbjIRIVm (ORCPT ); Mon, 18 Sep 2023 04:21:42 -0400 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.85.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA5551BEB for ; Mon, 18 Sep 2023 01:19:04 -0700 (PDT) Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with both STARTTLS and AUTH (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-272-E9YBwqP4P06q7i8DA9kLLg-1; Mon, 18 Sep 2023 09:18:52 +0100 X-MC-Unique: E9YBwqP4P06q7i8DA9kLLg-1 Received: from AcuMS.Aculab.com (10.202.163.4) by AcuMS.aculab.com (10.202.163.4) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Mon, 18 Sep 2023 09:18:40 +0100 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.048; Mon, 18 Sep 2023 09:18:40 +0100 From: David Laight To: "linux-kernel@vger.kernel.org" CC: Linus Torvalds , 'Andy Shevchenko' , 'Andrew Morton' , "'Matthew Wilcox (Oracle)'" , 'Christoph Hellwig' , "'Jason A. Donenfeld'" Subject: [PATCH next v4 4/5] minmax: Allow comparisons of 'int' against 'unsigned char/short'. Thread-Topic: [PATCH next v4 4/5] minmax: Allow comparisons of 'int' against 'unsigned char/short'. Thread-Index: AdnqCL56uRkZZqjMT8+4JbTB+DfbRQ== Date: Mon, 18 Sep 2023 08:18:40 +0000 Message-ID: <8732ef5f809c47c28a7be47c938b28d4@AcuMS.aculab.com> References: 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 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Since 'unsigned char/short' get promoted to 'signed int' it is safe to compare them against an 'int' value. Signed-off-by: David Laight --- v4: No change v3: No change v2: No change include/linux/minmax.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/include/linux/minmax.h b/include/linux/minmax.h index 1b6e7268af75..b636c3c50248 100644 --- a/include/linux/minmax.h +++ b/include/linux/minmax.h @@ -25,8 +25,9 @@ __builtin_choose_expr(__is_constexpr(is_signed_type(typeof(x))), \ is_signed_type(typeof(x)), 0) =20 -#define __types_ok(x, y) \ - (__is_signed(x) =3D=3D __is_signed(y)) +#define __types_ok(x, y) \ + (__is_signed(x) =3D=3D __is_signed(y) || \ + __is_signed((x) + 0) =3D=3D __is_signed((y) + 0)) =20 #define __cmp_op_min < #define __cmp_op_max > --=20 2.17.1 - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1= PT, UK Registration No: 1397386 (Wales)