Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp3105776imu; Thu, 29 Nov 2018 15:46:28 -0800 (PST) X-Google-Smtp-Source: AFSGD/X5JlA4Kg3Poaqt7FB+ytShsL7P4DOO7NpCdjQFhjsNOdujowJee6cO3FwijvaWIhPl7HpM X-Received: by 2002:a63:c00b:: with SMTP id h11mr3004945pgg.429.1543535188754; Thu, 29 Nov 2018 15:46:28 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1543535188; cv=none; d=google.com; s=arc-20160816; b=CSCbOtOuhgwhG+PeVrF9WY9jLZOnqIoYTboLrjA5sy7zE3xQUGQWHMx0jo5+c+8pae CCAPFAm5c+YVkBSWYaBN4Oz7JrPboXinW/MhDdXDzr4advGzfmcG6NgcyTtGHM6cgkpB UP3n7GVq3rOkM6Nc4HU63tg5SkQF25BjQZbkJbIE64ImVkuNgBqmoXRQe3wgGY2cWr9p DdHRZfqrz0Rl2AbxmDCTevO23+ImrrYGJE29/DQG1SBTYESqD86M9RQEVDHqJN0X4QdO ZBSJ4tQntZV/Xxe2q6FknxA7ygSb6At3vw3vQ0WYCvwX9VhMdjrr90eX096WLYbhF6qu QTDw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:date:subject:user-agent:message-id :references:cc:in-reply-to:from:to:content-transfer-encoding :mime-version:dkim-signature; bh=49zSS3k4eVEOrNLBfQTbyTe+luG824xEl9+CeksydJY=; b=UmxXZntZ7J1ueTsPqJBkUdqr5LGzvun2z9oO2JfeOXG7bG628rJbVilQF2mpnDCt7s F4G4lwkuBjDkhC12HSS0ZItYbiQHbGbsdJhdOAbuuzPno6/zfFBG2lwOCDsZzWZl38QN oSNEa6aLJ8zzxnCZrD4Fjs/ldmEUZtRbbV1KN7ZFodjoppNgASeHLULlzqJgCY9KxhcC FNuheiKzxJDTb6w2F1UJyUnbo+If9k/+0b2NIQ2eaCdHidUv5VIXCTu1gs8553L9Z7Av RdlsYEf+DybnuAv/oHQK3kQ6jWjEDjVuxcO/hjjdnHB+ugIzBvjcSVIuJxlpVSqSvBr4 p40Q== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b="1T4GyXw/"; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 193si3273990pgc.220.2018.11.29.15.46.09; Thu, 29 Nov 2018 15:46:28 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b="1T4GyXw/"; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727013AbeK3Kwj (ORCPT + 99 others); Fri, 30 Nov 2018 05:52:39 -0500 Received: from mail.kernel.org ([198.145.29.99]:60914 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726406AbeK3Kwj (ORCPT ); Fri, 30 Nov 2018 05:52:39 -0500 Received: from localhost (unknown [104.132.0.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C35C02145D; Thu, 29 Nov 2018 23:45:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1543535123; bh=49zSS3k4eVEOrNLBfQTbyTe+luG824xEl9+CeksydJY=; h=To:From:In-Reply-To:Cc:References:Subject:Date:From; b=1T4GyXw/zxaLfcGQJ4aE0ByvOhGtC2wi3rJibQdfCUuLt1xB7ManGeFtJg+SYj8qR J26vRrAyay0YiMf4XJATTUkabb/Ao7rLBI7nuym4oFhnsT0z+eV6ts5sH+ZzQVjlqo v/AVxXIhbY5qjVZVDVDiTGl+4GwFdg7B1+vAAmZ0= Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable To: Michael Turquette , Nicholas Mc Guire From: Stephen Boyd In-Reply-To: <1542803310-32673-1-git-send-email-hofrat@osadl.org> Cc: Michal Simek , Rob Herring , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Nicholas Mc Guire References: <1542803310-32673-1-git-send-email-hofrat@osadl.org> Message-ID: <154353512315.88331.4548631955021366823@swboyd.mtv.corp.google.com> User-Agent: alot/0.7 Subject: Re: [PATCH V2] clk: zynq: do not allow kmalloc failure Date: Thu, 29 Nov 2018 15:45:23 -0800 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Quoting Nicholas Mc Guire (2018-11-21 04:28:30) > The kmalloc here is small (< 16 bytes) and occurs during initialization > during system startup here (can not be built as module) thus if this > kmalloc failed it is an indication of something more serious going on > and it is fine to hang the system here rather than cause some harder > to understand error by dereferencing NULL. > = > Explicitly checking would not make that much sense here as the only > possible reaction would be would BUG() here anyway. > = > Signed-off-by: Nicholas Mc Guire > Fixes: 0ee52b157b8e ("clk: zynq: Add clock controller driver") > Acked-by: Michal Simek > --- Nak. We don't have any __GFP_NOFAIL in drivers/clk and I don't see a reason why we would want it here either. Just handle the failure, or don't care if this is so critical to system boot.