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=-3.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 98633C41604 for ; Wed, 7 Oct 2020 16:29:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 231152173E for ; Wed, 7 Oct 2020 16:29:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="tgw1uGYA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727560AbgJGQ3s (ORCPT ); Wed, 7 Oct 2020 12:29:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50372 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726105AbgJGQ3r (ORCPT ); Wed, 7 Oct 2020 12:29:47 -0400 Received: from mail-pf1-x441.google.com (mail-pf1-x441.google.com [IPv6:2607:f8b0:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4FD94C061755 for ; Wed, 7 Oct 2020 09:29:46 -0700 (PDT) Received: by mail-pf1-x441.google.com with SMTP id q123so1631816pfb.0 for ; Wed, 07 Oct 2020 09:29:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=CL4gnXJZmN9XDhtrufCMRd3kmkft5QuOZ0sUz4xoWP0=; b=tgw1uGYANjaQLWaqrvksQyx8zwxtOSBbGeXzYe1vovHG66jstCDGjxE5cDODCwfz3a LZs5gAuSQvPwIOra31ABAByC2YNCAQGDrkXS5qzSepvm8LLQfMKZfKj2bQLOfayJD+uV gpakVThVnyT9qdU27UgObIkIrRauHWB2Mv00+HGX2hC1uMI4y+66mjIZCTSvN9OG17iI yJUBxOxSivkAVsyC1tnHZGVG63W1NsoQa46H9qVIR51s2M8HQoroomH+xV1/iB9Mwyk+ PdEwzpZpHAvYWEJ3YzXtLaax3rFF21fHePbippLGLnnMucovQeaUwCja+EsgKB5TjJeb 84Dg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=CL4gnXJZmN9XDhtrufCMRd3kmkft5QuOZ0sUz4xoWP0=; b=HhQkYdy4+iTz+XW4VocpMNqXau3YjiRcMEkQVlNIKiuf6wDKPj2OHcBPB/vNBNAZA0 Os2V69YTsNYTfg2Y1jw4iFcXQkSgjDzx3ucSaJdc6LLC78Q/ey9fhclaCTFyjf7GHa1W lJRmPVW4O1evA409sgkzvRNzoYGT1aoB18/2BuIOjWns+EpNW/c0mClUahXh1XlvnbOP /cAIdGBAufOKPDbOSmy2T2tgUUEFBZAsQ7soXHdVSjpxV++NkGNXY5Txld3srhq8bnXX scKpn3toKizezV0kLtBL0crzidyEkL90z4g+XukG2HXUA8pUNnmhi4PgHTFzs+g50KMg Yv+w== X-Gm-Message-State: AOAM531/od+QpSUJxJPCl5OXrywdwy3rczPmvgHwbacl++yc/JSNnrAn AGNLpD7vAtAavcIuIEdGAtmY+0NLriw= X-Google-Smtp-Source: ABdhPJybl4x7DBfzosvVJaZlj0mVkfl95695bzOnG6D0jNm6aGPumqW32/rUDJ6QnQuuGs3NBFiImQ== X-Received: by 2002:a63:c34b:: with SMTP id e11mr3815170pgd.25.1602088185816; Wed, 07 Oct 2020 09:29:45 -0700 (PDT) Received: from localhost ([2409:10:2e40:5100:6e29:95ff:fe2d:8f34]) by smtp.gmail.com with ESMTPSA id x18sm3825885pfj.90.2020.10.07.09.29.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Oct 2020 09:29:44 -0700 (PDT) Date: Thu, 8 Oct 2020 01:29:42 +0900 From: Sergey Senozhatsky To: Guenter Roeck Cc: Sergey Senozhatsky , Petr Mladek , Shreyas Joshi , rostedt@goodmis.org, shreyasjoshi15@gmail.com, linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Linus Torvalds Subject: Re: [PATCH] printk: handle blank console arguments passed in. Message-ID: <20201007162942.GA440@jagdpanzerIV.localdomain> References: <20201006025935.GA597@jagdpanzerIV.localdomain> <20201006095226.GB32369@alley> <24f7a6bc-c917-2bb7-0e86-9d729c18e812@roeck-us.net> <20201006134328.GD32369@alley> <20201006163514.GE32369@alley> <20201006171504.GA64770@jagdpanzerIV.localdomain> <20201007072853.GF32369@alley> <20201007123044.GA509@jagdpanzerIV.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (20/10/07 08:57), Guenter Roeck wrote: > On 10/7/20 5:30 AM, Sergey Senozhatsky wrote: [..] > I can see to options: Link /dev/console to /dev/null if there is no console, > or do something like > > if (IS_ERR(file)) { > pr_warn("Warning: unable to open an initial console.\n"); > file = filp_open("/dev/null", O_RDWR, 0); > if (IS_ERR(file)) > return; > } As far as I can tell, /dev/null does not exist yet on this stage (at least not in my system). But generally the idea looks interesting. -ss