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 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 50148CD98F2 for ; Sun, 21 Jun 2026 13:04:04 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B092010E391; Sun, 21 Jun 2026 13:04:03 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="Fov1mXvD"; dkim-atps=neutral Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 14E0110E391; Sun, 21 Jun 2026 13:04:03 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id ED7EF43E1A; Sun, 21 Jun 2026 13:04:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 436C81F000E9; Sun, 21 Jun 2026 13:03:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782047042; bh=XZ3QL+ViFIRQLIm9wDhWdL0BX/Xy+P2cyftFjHpTXuA=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=Fov1mXvDuGCK2T8sN6e2OfQHKCECHfbpGXRBBqt0mJumjJ/lQbWWgN+HJ+/A1VLw+ e5YBQ183dvuJj8bkhkLpBwxFrOxwQLVALwfGN8E1vAdvSrax2YUe76xVCjK7uPwOFi 8L8TB9EiAaEyP+6x5OTgJet8aZiHBkKPALBPE4+VYsqKVHMeJsBx9VwREe4epBtPeP n9K1YBwfMVRT70tbP5fJHUITXTsn/07OQJHxOY03KDzngCMaGRvGI98OxNWNIGSt1/ pUwueEV4G7f1R4ZCP/PbFKS6BI+0tZTyLgw9UhMTaK5YsTglkNBetTBg7DaYsXC78p S9lKpmXhld3Cw== Date: Sun, 21 Jun 2026 09:03:53 -0400 From: Steven Rostedt To: David Laight Cc: Thomas Gleixner , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Linus Torvalds , Sebastian Andrzej Siewior , John Ogness , Peter Zijlstra , Julia Lawall , Yury Norov , linux-doc@vger.kernel.org, linux-kbuild@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, dri-devel@lists.freedesktop.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-rdma@vger.kernel.org, linux-usb@vger.kernel.org, linux-ext4@vger.kernel.org, linux-nfs@vger.kernel.org, kvm@vger.kernel.org, intel-gfx@lists.freedesktop.org Subject: Re: [PATCH 2/2] tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h Message-ID: <20260621090353.24772584@fedora> In-Reply-To: <20260621135531.243375d9@pumpkin> References: <20260621093430.264983361@kernel.org> <20260621093811.168514984@kernel.org> <87ik7cmcb7.ffs@fw13> <20260621135531.243375d9@pumpkin> X-Mailer: Claws Mail 4.4.0 (GTK 3.24.52; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Sun, 21 Jun 2026 13:55:31 +0100 David Laight wrote: > Indeed... > Isn't trace_printk() just an extern? > Having it defined somewhere isn't going to make any difference to build times. No it is not. It is a macro to cut as many nanoseconds as possible as trace_printk() was created to debug tight race conditions and any added latency can make the race go away. -- Steve