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=-8.6 required=3.0 tests=DATE_IN_PAST_06_12, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 32C32C7618F for ; Fri, 19 Jul 2019 01:03:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 174B52084C for ; Fri, 19 Jul 2019 01:03:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726476AbfGSBDx (ORCPT ); Thu, 18 Jul 2019 21:03:53 -0400 Received: from mail-pg1-f196.google.com ([209.85.215.196]:36891 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725992AbfGSBDv (ORCPT ); Thu, 18 Jul 2019 21:03:51 -0400 Received: by mail-pg1-f196.google.com with SMTP id i70so2919275pgd.4 for ; Thu, 18 Jul 2019 18:03:51 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=NeZWfcFnSfb2JXPqpIHsIL/8cap/wG9dpclmggbuVqI=; b=IP5Cv0DQokcfIsNyf2nzjXfWCuYqUcmK0Ng1fT3g6fULJdKT8WM/5nPmXWGOQk0l7U 1i7fDK7td3/zb4i6EhBQnT5axgv7gn7HJdPqDMR5T9mVNv/M9e1sRoIlDADt3gDZt+fI aNt9amNwm5U4Oy85EzvdaBLFgk0wAa3y9nK7JJtjZ+N4xNStRwlui4V564HAykjnrEzD rTbY+zb2Zrdl3/gaIBt0QRgqLO7sh3LUdJS3jX/EESv9kPo9l2s0sA3cbdcO4JTv+DHm m0gSp4ped8XMlD4NBRBzSgqCEQSCM67aiThy1KAtiSpa1/xOKO4n7eXG4nVNj7/1+YBU KVnA== X-Gm-Message-State: APjAAAUYxYWXhp3YQsjG/6NXpTl2bG2IiLZvGkuJwVN1EKrERa+8O/JD SeNHjzhZthA5oU6pz4ZD9S4= X-Google-Smtp-Source: APXvYqy+XLBKrmpgSIKIM8AKepW2XIc4tgzVg6hc2Mhs3ZbM/Y/IDOiTGIkYqPr7R2M6688PuHJoYw== X-Received: by 2002:a17:90a:d58c:: with SMTP id v12mr53342650pju.7.1563498230854; Thu, 18 Jul 2019 18:03:50 -0700 (PDT) Received: from sc2-haas01-esx0118.eng.vmware.com ([66.170.99.1]) by smtp.gmail.com with ESMTPSA id q144sm28887612pfc.103.2019.07.18.18.03.49 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 18 Jul 2019 18:03:50 -0700 (PDT) From: Nadav Amit To: Peter Zijlstra Cc: Andy Lutomirski , x86@kernel.org, linux-kernel@vger.kernel.org, Dave Hansen , Thomas Gleixner , Ingo Molnar , Nadav Amit Subject: [RFC 1/7] compiler: Report x86 segment support Date: Thu, 18 Jul 2019 10:41:04 -0700 Message-Id: <20190718174110.4635-2-namit@vmware.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190718174110.4635-1-namit@vmware.com> References: <20190718174110.4635-1-namit@vmware.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org GCC v6+ supports x86 segment qualifiers (__seg_gs and __seg_fs). Define COMPILER_HAS_X86_SEG_SUPPORT when it is supported. Signed-off-by: Nadav Amit --- include/linux/compiler-gcc.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index e8579412ad21..787b5971e41f 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -149,6 +149,10 @@ #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1 #endif +#if GCC_VERSION >= 60000 +#define COMPILER_HAS_X86_SEG_SUPPORT 1 +#endif + /* * Turn individual warnings and errors on and off locally, depending * on version. -- 2.17.1