From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BC06B48094A; Thu, 23 Jul 2026 14:34:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.40.44.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784817251; cv=none; b=Ee7xe17cnZLanVLAs+LpN3PODZmPsGaqvqRHe0QmNgA/H9WCRhQk75pPQI78kH60yBUdrj8uJYSb4kFFObQ315LJ3O+85/sujhReieo2ymoGOXNFvH163jA+hx0/eaAO6q52IAHyIP03ARzpiLgfEMf0bB38DRvX3VVh/rqgMAE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784817251; c=relaxed/simple; bh=rnzS3t2OB9mXDKCdXxoAM7rMpi7xvwiWGRBta5UVvXE=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=W4286ReeLlbLgg6NSwPv/tAeBeUuPeRKPpD+63RxzXwhCBFKE3xeZsZk76exZjg9qxv/urKP5tSUor9FKWjpF9R47y7ooP9xMwd8Rn/V/VQKKbzUV9ljEC4ALALsnXn0mP0OfuoCn/tQtOa7MrzmemnmCVN9EyQswzHWJOhaYlw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org; spf=pass smtp.mailfrom=goodmis.org; arc=none smtp.client-ip=216.40.44.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=goodmis.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=goodmis.org Received: from omf12.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 99A3DC04D7; Thu, 23 Jul 2026 14:34:00 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: rostedt@goodmis.org) by omf12.hostedemail.com (Postfix) with ESMTPA id 056E717; Thu, 23 Jul 2026 14:33:13 +0000 (UTC) Date: Thu, 23 Jul 2026 10:33:36 -0400 From: Steven Rostedt To: Andi Kleen Cc: Markus Elfring , acpica-devel@lists.linux.dev, bpf@vger.kernel.org, coresight@lists.linaro.org, kvm@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-perf-users@vger.kernel.org, linux-pm@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, mptcp@lists.linux.dev, netdev@vger.kernel.org, platform-driver-x86@vger.kernel.org, virtualization@lists.linux.dev, Adrian Hunter , Alex Mastro , Alex Williamson , Alexander Shishkin , Alexei Starovoitov , Andrew Lunn , Andrew Morton , Andrii Nakryiko , Ankur Arora , Arnaldo Carvalho de Melo , Bartosz Golaszewski , Bobby Eshleman , Christian =?UTF-8?B?Qm9ybnRyw6RnZXI=?= , Christophe Leroy , Chun-Tse Shao , Claudio Imbrenda , Costa Shulyupin , Crystal Wood , Daniel Borkmann , Daniel Lezcano , David Hildenbrand , David Matlack , "David S. Miller" , Donald Hunter , Eduard Zingerman , Emil Tsalapatis , Eric Dumazet , Gabriele Monaco , Geliang Tang , Ian Rogers , Ingo Molnar , Ivan Pravdin , Jakub Kicinski , James Clark , Janosch Frank , Jason Xing , Jiri Olsa , Joe Damato , John Garry , Josh Poimboeuf , Kaushlendra Kumar , Kent Gibson , Kumar Kartikeya Dwivedi , Len Brown , Leo Yan , Lukasz Luba , Madhavan Srinivasan , Mark Rutland , Martin KaFai Lau , Masami Hiramatsu , Mat Martineau , Matthieu Baerts , Michael Ellerman , Mike Leach , Mina Almasry , Mykyta Yatsenko , Nam Cao , Namhyung Kim , Nicholas Piggin , Paolo Abeni , Paolo Bonzini , Pawel Chmielewski , Peter Zijlstra , Quentin Monnet , "Rafael J. Wysocki" , Raghavendra Rao Ananta , Saket Dumbre , Shuah Khan , Simon Horman , Song Liu , Srinivas Pandruvada , Stanislav Fomichev , Stefano Garzarella , Suzuki K Poulose , Swapnil Sapkal , Thomas =?UTF-8?B?V2Vpw59zY2h1aA==?= , Tomas Glozar , Vipin Sharma , Wander Lairson Costa , Will Deacon , Willem de Bruijn , Willy Tarreau , Yonghong Song , Zhang Chujun , Zhang Rui , LKML , kernel-janitors@vger.kernel.org Subject: Re: [PATCH] tools: Use fputc() calls in some functions Message-ID: <20260723103336.6593118b@gandalf.local.home> In-Reply-To: References: <48f2d61f-d468-49b7-881e-f00777db073f@web.de> X-Mailer: Claws Mail 3.20.0git84 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: ncsjbmpq4hct7p4sj4iefr1r53tacukj X-Rspamd-Server: rspamout02 X-Rspamd-Queue-Id: 056E717 X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX1+f7u83oRUulG9XwKl2P+q3kHYGrSLtLJ0= X-HE-Tag: 1784817193-538669 X-HE-Meta: U2FsdGVkX19mSJrQ4yCgpa5T21s3DOyupJQtrDkbhb4BdFNkpGoXwq/ibfVmVhXFNmqX8uwKJldaBwfXYwLpcFxk6WAoDZEXT/gOP4/87ir9dCPM++yAwBRZudspVL4fEcLJ8BQR+IIioDSpRN3BUfGiJrTRVS7/uta9AmYBpm0bV/zvbFblUCnE1I0vyxTsAPHkh0LX+JrCxO4Fb8yldd7jKVRG3hDwMmD/y539S+5vq64BAxIp9RMpMFz5panzgBl/T6DnlC5NF2X6cBflLJ9t5of1YaVukjrextWC1Mkdf4ypcuVGdK7IR4N2F6BEhF3E+awXwxrLnbww9pI6GrXPJih6633rwSWNy/mC4FmaOinac79jHA== On Thu, 23 Jul 2026 06:47:00 -0700 Andi Kleen wrote: > > The source code was transformed by using the Coccinelle software. > > gcc already does this transformation automatically. Yep, I showed this in my talk[1] that looked at what printf("Hello World!") does. Doing an objdump of: #include int main(void) { printf("Hello World!\n"); return 0; } has: 0000000000001139
: 1139: 55 push %rbp 113a: 48 89 e5 mov %rsp,%rbp 113d: 48 8d 05 c0 0e 00 00 lea 0xec0(%rip),%rax # 2004 <_IO_stdin_used+0x4> 1144: 48 89 c7 mov %rax,%rdi 1147: e8 e4 fe ff ff call 1030 <<<--- puts and not printf 114c: b8 00 00 00 00 mov $0x0,%eax 1151: 5d pop %rbp 1152: c3 ret -- Steve [1] https://www.youtube.com/watch?v=JRyrhsx-L5Y