From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f44.google.com (mail-wm1-f44.google.com [209.85.128.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1561E3BED5F for ; Wed, 8 Apr 2026 12:12:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.44 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775650354; cv=none; b=kKxvREo2Azfiq8XDT7hRnDog1RZYFwia6zO8tWF/R3EBzr5f+7NNgga+8yBBEKGHh0obJe5wfxSqLqB86felcL3ND5Z6DCNttiWQ33B7poAxgvXh5nZs/DcaM/L7YKUhiHih403q/dDJ1i/OqH/phvDRUsfGGP4E5afMGugxHWg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775650354; c=relaxed/simple; bh=+t3ECGfjDU3Jm0nOVmjqUwvL7N6is01X1rzceLr0rf0=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Ted9af9KmkmVlxPjsO650W6lDCFJz8/6AaqKRs9dCMPBS6eLTtENSJJz7OuetG/p5qG0dl77SNxOmRjuPdh2KWRF/qbfQ7o21fkLPhc384Txi7zgnKZHjyF351GQncZU8qZKg3YvJzc3q3nZRns9O81pucWyI8FMm2NOtUKNX2c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=kqZF0DCl; arc=none smtp.client-ip=209.85.128.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="kqZF0DCl" Received: by mail-wm1-f44.google.com with SMTP id 5b1f17b1804b1-488b0046078so33171705e9.1 for ; Wed, 08 Apr 2026 05:12:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1775650351; x=1776255151; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:from:to:cc:subject:date :message-id:reply-to; bh=6MEtYTVC/R8o3JeFzzDEI2ox+DEqWpYaAESHBwT9e4w=; b=kqZF0DCl2nIhn7zH0CpamGOrShtHfr6LUNCKPYMWWVR2UH8tEXQC2j1S0Nk3NxaBvd 7MtyLW3+S3f2x5yPBXbbvFvW0MT+1capZiZLDVNsDgcAVZEJAvNMPO0setkycQA1NKuA 2t0WZWO/R/tyx5b6fJMPOKKFB3WKnN3vx0RtLz+JC9WvlT8ppT00YSNIuQFFrfGKxrcs w6dF73UUvpyd3xaf6h4DF00kHkpIyYmqMQRqFSwPU/kXrPpmCAQLmwoh93jKX2xdsrAg fZbytHd+OkcEpwXq1QnNjJgzWQK9nD2K0buZOxV5L8sQ7vXltymtZmThZPQlbsMdLZH8 8pqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775650351; x=1776255151; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=6MEtYTVC/R8o3JeFzzDEI2ox+DEqWpYaAESHBwT9e4w=; b=g6TOncvxcBR4MN5rt0+LLoSN6JBNy3uwTFwA2kbGHmcsx+JGZ4UvGC2DlYbsRnUE5V Ae3PHP8dNAi8PpN8XaTFvQh6kx82TGWAf/81HAsnJOqxO54JjUHYaz1zHjZMNUAESMNj nVWGdEiqwwYyOJuqmCp+S9Uj6npHBudzR34ChxUJK7USVbmUMh3iM1BPU3suWAre5VvL FSOct+K8eNtWYvNiPBqEGLnwWDB/+B2ursBt/jA/SzpOPH3RCcHmAjhNCPcpQ7/WCjJC v8Oa1zqKlMbEvKViuDqRBWzKqAhEzaVzTVdd81nq1rkr+fQGrZWSHzce7SFt9JJugGNv bgCg== X-Forwarded-Encrypted: i=1; AJvYcCVvusOPKmST8s/5LmxTqEl4IQ3B2hn70L1Guh4qhz8xlfCgGNk/JgjafpGIQLxKEZHrPBUT57o=@vger.kernel.org X-Gm-Message-State: AOJu0YwMS9nVeXRYMMqrsxu1FgQrL5LN6RCLCCX9WYCKJAhiJsvLX/go bgWVZ1tlFI6A3M2urxi5KC4h8R9iZNUsZeo6W4VF3GTSrAt9DJqh/Zb9bH7bK2WT X-Gm-Gg: AeBDievKFAKYHs0TKtR72WIFJWHt8QKOAU9vKhKlxZv8GsJeVHB0XocIwSpfQ3ZGUTv RdHPgfmw+7NM75FgGqrP8bZDAavTQmHsiVjpJKhHu3rd5Stnawl8j7oYKviE2o4Ki7A7UHXmoxu 4qzbAKcLtE6c2IRuwTht6fqFH1WdVGmsvYsZGZNyjYJNIuDI4LJc/pMf52ccQFI6PSGqeuzJTws p+NZZFca9Uekgs29BnqIDcWdJ6n7vim6xyxkBFFyT1I1LIpsxjqebIMfB6W2EQGqS0H1TGByZ5k OdE4EC5zwrQ3vNe062Y6Dn9+LWIyGseP3cK1DLaiLBQZPB6ePWHyOQJhyk86ttXd0Tj0pemsJ2h W9hVGanOD2ZWySxs82N+3CZFKPxylKVuYIIKznzI/vlSMo0/EZNKQk2C0/eewhfEQOI52oDEUkl 4zvvUT/nnUXS4gRNslK3AE52CIVpGlH2I7KGtcTc44eAqfvP0V2G7TT/bz5E975UPZzeeJZrKKu FU= X-Received: by 2002:a05:600c:48a8:b0:488:a4d6:69ad with SMTP id 5b1f17b1804b1-488a4d66b42mr108205515e9.27.1775650351364; Wed, 08 Apr 2026 05:12:31 -0700 (PDT) Received: from pumpkin (82-69-66-36.dsl.in-addr.zen.co.uk. [82.69.66.36]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-488c530910csm19148255e9.2.2026.04.08.05.12.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Apr 2026 05:12:30 -0700 (PDT) Date: Wed, 8 Apr 2026 13:12:27 +0100 From: David Laight To: Andy Shevchenko Cc: Petr Mladek , Steven Rostedt , Tamir Duberstein , Rasmus Villemoes , Sergey Senozhatsky , linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel test robot Subject: Re: [PATCH] printf: mark errptr() noinline Message-ID: <20260408131227.0824c330@pumpkin> In-Reply-To: References: <20260405-printf-test-old-gcc-v1-1-76d24d9bb60e@kernel.org> <20260406111531.779571d7@gandalf.local.home> <20260406123232.3dacbe94@gandalf.local.home> <20260407160809.48d5fe2a@pumpkin> <20260408100425.7231966a@pumpkin> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Wed, 8 Apr 2026 14:29:59 +0300 Andy Shevchenko wrote: > On Wed, Apr 08, 2026 at 10:04:25AM +0100, David Laight wrote: > > On Wed, 8 Apr 2026 09:24:58 +0200 > > Petr Mladek wrote: > > > On Tue 2026-04-07 16:08:09, David Laight wrote: > > > > On Mon, 6 Apr 2026 12:32:32 -0400 > > > > Steven Rostedt wrote: > > > > > On Mon, 6 Apr 2026 11:21:39 -0400 > > > > > Tamir Duberstein wrote: > > ... > > > > > Even having the KASAN/KMSAN code compiled into allmodconfig is a PITA > > > > when you are trying to check that code compiles to something sensible. > > > > > > This does not look like a good idea. KASAN/KMSAN are very useful > > > features. People will want to keep them working. Removing them from > > > randconfig would just postpone detection of the problem. We would > > > need to deal with it sooner or later anyway. > > > > True, but when I build an allmodconfig build to check how the asm looks > > I really don't want them. > > Isn't easy to disable that in the command line to `make`? It is a config option, and I think you need to reset it every time you rerun 'make allmodconfig' to pick up config changes. You can enable -Werror with W=e, but not disable it if you want to set W=1. I did have a patch that let you use W=1-e which is useful. David > > > For the 'bot' builds you also want to know whether they are defined. > > Changes to how things are built rather than what is built can throw > > up unexpected warnings that are very hard to pin down. > > > > It is bad enough finding things that affect one obscure architecture > > with a specific compiler version when the compiler just makes slightly > > different decisions, without having unusual compilation/config options > > is the mix to muddy the waters further. >