From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 6019621E3D9; Tue, 15 Oct 2024 23:47:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729036050; cv=none; b=l8AfOruZWja4OA3mveG/3eF4kAiQVNTNyjhc9ag+G+UpiLHyIsM5lfOxLa/bMVc2WzG95Nh9VF8v2ruqMBCqzT5b6NzBjU+DPT/6CaSLoGrTXA+FQ7Dro8kw7GRdJBbJzKH1puyfumvBFl2ad05nSWjLWsOf1B3kpVHOsa/K2N0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729036050; c=relaxed/simple; bh=OvwqGNg+FxCMd+bUiVx6t9oUkTAZwabidrToATtsBZo=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=dCJGqJNGWVndaWvaliAE/a1JsB+nusIE5nDmEyaVqMqNVZVJnQsYR43FoNTj/5gTBUyEf+V5eLtsTVVi6DXU/xcmz0+kpz/Vs/7CHdVv/vwOmIj/az66e/K0eD87SoYyS2J3TWWtlFtIwhaMNy+KTpUmUoo3PYp+ovEkpFf7bQw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XjFwOzi2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XjFwOzi2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 10305C4CEC6; Tue, 15 Oct 2024 23:47:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729036049; bh=OvwqGNg+FxCMd+bUiVx6t9oUkTAZwabidrToATtsBZo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=XjFwOzi2BliEFHr+mGq0ODCDL238vAdqMfZ+s41eKB2FB5V7KXhajAwS2L46Rfper ZodWMS1neWVUueTnfBkkObZ+M93Vq5sG6dJSNb0vYXnwnOV4pRu4+Gj37Fdh65lKby /rpVuutyVVxt8YRTdZYlC+8y+WjDIs4gDi7U+YTcPwV5K7I5khODfpX1POmHrWZTCM Yol/TGyYVmS2T9RvM1MPr/V4e10Rod/3W2+pofvPUgXLWe0ifC2M+It4RXbNxVcGO0 z3MqRNYDsCqDm/ZfS8jzEM4Jyq5Oq/daHmM1OeAkBjA4DdJukTb0HfcdxJiwgZDcS1 btQhbLNgy8rZA== Date: Wed, 16 Oct 2024 08:47:20 +0900 From: Masami Hiramatsu (Google) To: Heiko Carstens Cc: Alexei Starovoitov , Steven Rostedt , Florent Revest , linux-trace-kernel@vger.kernel.org, LKML , Martin KaFai Lau , bpf , Alexei Starovoitov , Jiri Olsa , Alan Maguire , Mark Rutland , linux-arch@vger.kernel.org, Catalin Marinas , Will Deacon , Huacai Chen , WANG Xuerui , Paul Walmsley , Palmer Dabbelt , Albert Ou , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Mathieu Desnoyers Subject: Re: [PATCH v16 04/18] function_graph: Replace fgraph_ret_regs with ftrace_regs Message-Id: <20241016084720.828fefb791af4bcf386aac91@kernel.org> In-Reply-To: <20241015183906.19678-B-hca@linux.ibm.com> References: <172895571278.107311.14000164546881236558.stgit@devnote2> <172895575716.107311.6784997045170009035.stgit@devnote2> <20241015183906.19678-B-hca@linux.ibm.com> X-Mailer: Sylpheed 3.8.0beta1 (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 On Tue, 15 Oct 2024 20:39:06 +0200 Heiko Carstens wrote: > That would make things much simpler... e.g. your new patch is also > writing r3 to fregs, why? BTW, according to the document [1], r3 is for "return value 1", isn't it used usually? [1] https://www.kernel.org/doc/Documentation/s390/Debugging390.txt Thanks, -- Masami Hiramatsu (Google)