From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f176.google.com (mail-yw1-f176.google.com [209.85.128.176]) (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 D2B0611703; Sun, 7 Jan 2024 21:07:57 +0000 (UTC) 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="W9ec5ptg" Received: by mail-yw1-f176.google.com with SMTP id 00721157ae682-5f3a5b9e09cso1778287b3.0; Sun, 07 Jan 2024 13:07:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1704661676; x=1705266476; darn=vger.kernel.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=XqFKwxe/g7DE0cTXEUKKeAEz7faDz+ZW7iaTXoLpK84=; b=W9ec5ptgPdVqAliAk2GdrVAJYbPssVEC+ImW7qtNCsFl95MoMFCVmUzxXpdjOFtjJR weGJa0jO07grYUDZE3QovtyH6q34nWfTSAhjZVDxnCSvv916yPs8v2nlukZF89F0sU1/ M4IYAq0LmtyqIkBC5y3A7aSSzbRB8Oag6gjhZhrsq8clICl2/7Te/IzDyr7keQbRnn9Z E1/8ej/TP8Bgvooi1NkZXf3yAFz/EUpxiCHu11oLy4t58eAQijqtUyWtaZAYoAxNdd1H 94PJkNNeSKF/xzYzqDSbYrBOZk8jR39mTVWSK6KsfEuWPw8BCC7tJQpx4F2OQ4Jt9Iuu O8Sg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1704661676; x=1705266476; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=XqFKwxe/g7DE0cTXEUKKeAEz7faDz+ZW7iaTXoLpK84=; b=sLK7QkTVzEqH+smQrsaGkyZUdyYh1mWMu4FMIM6SRxtZvBr3qSDYL9XUZRnAj6QZwo 2zpMuBSFddHurtJAiL3M5H1+gvPE7Ppd891qIR3SBWG+DsXkEe/h7E13uk73WnuSsmLG j8S2EtAjeNFKxSQA+buohoR6UYe9f0TXSnEiFtAn42QM4wVp5Z6X9nKug47mrhOB5OXn kHA34OGNJOehIsucaYNZi5cdWW4Ifaq9LwXLeZoevjiRRmldf1sb1UpB3WbuqcQeUosi t1l2JXfBCj9qHnIpQZ/H//7u3kinzRwmJGH4sv34ePtWyiu2gl9yixm+RngTZBS3G2VE cVtg== X-Gm-Message-State: AOJu0Ywd8VjLX5PENliBFg++w0H/qnp5ZH2gjPj9jO4KowPKFbHmAiAl vJnyin0K+KBYGiG/8wzZut4= X-Google-Smtp-Source: AGHT+IHgoO6dUdsEdmQNWRRdnNI1v5fKLRztD/ue3i/uQsJd0T1Up1P+Rg3Ai34bQ5DYYg8vrEb1Eg== X-Received: by 2002:a81:bc4d:0:b0:5f6:e144:3396 with SMTP id b13-20020a81bc4d000000b005f6e1443396mr1244154ywl.4.1704661676655; Sun, 07 Jan 2024 13:07:56 -0800 (PST) Received: from hoboy.vegasvil.org ([2600:1700:2430:6f6f:e2d5:5eff:fea5:802f]) by smtp.gmail.com with ESMTPSA id x129-20020a818787000000b005ccb2d17ba7sm2588783ywf.101.2024.01.07.13.07.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 07 Jan 2024 13:07:56 -0800 (PST) Date: Sun, 7 Jan 2024 13:07:53 -0800 From: Richard Cochran To: Mahesh Bandewar =?utf-8?B?KOCkruCkueClh+CktiDgpKzgpILgpKHgpYfgpLXgpL4=?= =?utf-8?B?4KSwKQ==?= Cc: Netdev , Linux , David Miller , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Jonathan Corbet , John Stultz , Don Hatchett , Yuliang Li , Mahesh Bandewar , Willem de Bruijn Subject: Re: [PATCHv3 net-next 2/3] ptp: add ioctl interface for ptp_gettimex64any() Message-ID: References: <20240104212439.3276458-1-maheshb@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Sat, Jan 06, 2024 at 12:08:57AM -0800, Mahesh Bandewar (महेश बंडेवार) wrote: > Having a general solution for posix timers is a nice addition. > However, expecting a general purpose syscall to eliminate need for > device ioctl is an unreasonable expectation. Let me make this clear: There is no reasonable justification for a new PTP ioctl. The system call can and should use the the most accurate method internally to the kernel. Thanks, Richard