Received: by 2002:a4a:301c:0:0:0:0:0 with SMTP id q28-v6csp844432oof; Tue, 25 Sep 2018 05:32:17 -0700 (PDT) X-Google-Smtp-Source: ACcGV62CAwRNjha71SFbrKRxPR3R6msnBs2S2z1gRQieLvOMCAJ6QHmBuis4pZP3rI1o3Wq/qBgl X-Received: by 2002:a17:902:ba95:: with SMTP id k21-v6mr1042028pls.38.1537878737271; Tue, 25 Sep 2018 05:32:17 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1537878737; cv=none; d=google.com; s=arc-20160816; b=oc00ZDjYCXcmjvjlFxbIltK8oeiE0fCNbmRRJBqgJ4g+PM2jR0xJdKFCVZF2jJZfbD Ld3GzpyfhsSf/l8xQOIo6U6IAibTNfTF2KzSypaPnFBgyEauj8/G49WYeS0FH2r4NZdI sxGgXg1RsYh/QmMyK20/ff2UuCqsyoHwS3NZdp4FjbNFzEqZjDgWaqgT2R+sAX4ALVYH aW8NE1kzq8zxOZPdYPdqEta56vrgSpCmj2/ESMFZIWyGR7u2OHQ5bFvChONiBtAAt4U3 GovMzcMc3KkA/7hp90Veg17/91CyFTAJv62ascv49wfYgvvrrrVhj+vWhq+MSDjKY/tw Qyhw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=olibduhWJecf4IIUetLW7Q34edMO0/vdGcbZIPcRu9I=; b=HnOtLsWLyrp3wr5kS/CnwhFsHZr4iTJqPOl7Jfj1HKrWkUlFIOKbXEKJbaFfsKxF3d yud59RwZi8okjsD6uAW+yRdyd+ORJcpaMY1qFzzyz+A5n9kW/VTLmmG7FkUM3D2ZNz/F FFeTVk7k4qNK+3kgF+opgh2cMf65v6MVsOXZLVZqPFKxtYbR3CBx7uevWIYMZ/l4dmmU yAFBcRI+5thycwZ59P0rIhAv5QY383WS6of0uTYw02Q7s1zXzwxPvVRNtBNqDjQZWn9c Mj+RHrXHmFwh+DooK++4sqZPrfeQ8DRtz9dVXSYEf7DwBr9CxykpjN1BTPxr4syBiGLw kVRw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id k3-v6si2358633pld.6.2018.09.25.05.32.00; Tue, 25 Sep 2018 05:32:17 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729106AbeIYSib (ORCPT + 99 others); Tue, 25 Sep 2018 14:38:31 -0400 Received: from webbox1416.server-home.net ([77.236.96.61]:38046 "EHLO webbox1416.server-home.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728588AbeIYSib (ORCPT ); Tue, 25 Sep 2018 14:38:31 -0400 Received: from imapserver.systec-electronic.com (unknown [212.185.67.146]) by webbox1416.server-home.net (Postfix) with ESMTPA id 6C97727A4D1; Tue, 25 Sep 2018 14:31:09 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by imapserver.systec-electronic.com (Postfix) with ESMTP id 194B11A1B52; Tue, 25 Sep 2018 14:31:09 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at imapserver.systec-electronic.com Received: from imapserver.systec-electronic.com ([127.0.0.1]) by localhost (imapserver.systec-electronic.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id eO76ewmllw_A; Tue, 25 Sep 2018 14:31:07 +0200 (CEST) Received: from ws-140106.localnet (ws-140106.systec.local [192.168.10.85]) by imapserver.systec-electronic.com (Postfix) with ESMTPA id 460511A1B55; Tue, 25 Sep 2018 14:31:05 +0200 (CEST) From: Alexander Stein To: Arnd Bergmann Cc: alexander.lochmann@tu-dortmund.de, linux-arch , Linux Kernel Mailing List Subject: Re: [x86] BUG()/BUG_ON() macros cannot be disabled Date: Tue, 25 Sep 2018 14:31:05 +0200 Message-ID: <6262522.aGb77nX7K0@ws-140106> In-Reply-To: References: <9516e4b3-f9f2-b150-f019-8b1ef465efb3@tu-dortmund.de> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello Arnd, On Tuesday, September 25, 2018, 2:06:38 PM CEST Arnd Bergmann wrote: > We don't really want an empty macro any more, this was used in > the past, but causes compile-time warnings and undefined behavior > for no good reason. Can you elaborate or point me to some other discussion about that undefined behavior? Best regards, Alexander