From owner-svn-src-stable@freebsd.org Mon Aug 3 09:11:11 2020 Return-Path: Delivered-To: svn-src-stable@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 4D622373CEC; Mon, 3 Aug 2020 09:11:11 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BKsZ71BRkz4Wtc; Mon, 3 Aug 2020 09:11:11 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 0C5B811E4E; Mon, 3 Aug 2020 09:11:11 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 0739BAOs017508; Mon, 3 Aug 2020 09:11:10 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 0739BAmB017507; Mon, 3 Aug 2020 09:11:10 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <202008030911.0739BAmB017507@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Mon, 3 Aug 2020 09:11:10 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r363789 - stable/12/sys/compat/linuxkpi/common/include/linux X-SVN-Group: stable-12 X-SVN-Commit-Author: hselasky X-SVN-Commit-Paths: stable/12/sys/compat/linuxkpi/common/include/linux X-SVN-Commit-Revision: 363789 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 Aug 2020 09:11:11 -0000 Author: hselasky Date: Mon Aug 3 09:11:10 2020 New Revision: 363789 URL: https://svnweb.freebsd.org/changeset/base/363789 Log: MFC r361549: Add overflow.h to the LinuxKPI. Only add check_add_overflow and check_mul_overflow as those are the only two needed function by DRM v5.3. Both gcc and clang have builtin to do this check so use them directly but throw an error if the compiler/code checker doesn't support this builtin. Sponsored-by: The FreeBSD Foundation Reviewed by: hselsasky Differential Revision: https://reviews.freebsd.org/D25015 Added: stable/12/sys/compat/linuxkpi/common/include/linux/overflow.h - copied unchanged from r361549, head/sys/compat/linuxkpi/common/include/linux/overflow.h Modified: Directory Properties: stable/12/ (props changed) Copied: stable/12/sys/compat/linuxkpi/common/include/linux/overflow.h (from r361549, head/sys/compat/linuxkpi/common/include/linux/overflow.h) ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ stable/12/sys/compat/linuxkpi/common/include/linux/overflow.h Mon Aug 3 09:11:10 2020 (r363789, copy of r361549, head/sys/compat/linuxkpi/common/include/linux/overflow.h) @@ -0,0 +1,52 @@ +/*- + * Copyright (c) 2020 The FreeBSD Foundation + * + * This software was developed by Emmanuel Vadot under sponsorship + * from the FreeBSD Foundation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef __LINUX_OVERFLOW_H__ +#define __LINUX_OVERFLOW_H__ + +#ifndef __has_builtin +#define __has_builtin(x) 0 +#endif + +#if __has_builtin(__builtin_add_overflow) +#define check_add_overflow(a, b, c) \ + __builtin_add_overflow(a, b, c) +#else +#error "Compiler does not support __builtin_add_overflow" +#endif + +#if __has_builtin(__builtin_mul_overflow) +#define check_mul_overflow(a, b, c) \ + __builtin_mul_overflow(a, b, c) +#else +#error "Compiler does not support __builtin_mul_overflow" +#endif + +#endif /* __LINUX_OVERFLOW_H__ */