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 X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E30A3C43331 for ; Thu, 7 Nov 2019 19:39:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AB4D72166E for ; Thu, 7 Nov 2019 19:39:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="MUo2nTdj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726982AbfKGTjO (ORCPT ); Thu, 7 Nov 2019 14:39:14 -0500 Received: from mail-wm1-f65.google.com ([209.85.128.65]:52547 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725882AbfKGTjN (ORCPT ); Thu, 7 Nov 2019 14:39:13 -0500 Received: by mail-wm1-f65.google.com with SMTP id c17so3788827wmk.2 for ; Thu, 07 Nov 2019 11:39:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:cc:references:from:openpgp:autocrypt:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=9a7fJg7X5ZGewqvjA5LZwm7IjwMkLyF2YEiM5wrvuak=; b=MUo2nTdjCCe5diqCGSu2xoCQ0YMbvHgaxPZt5fTTEVu+O6TBet9izOOX7vmH198rKY EuQwiR9V77eey4436rweqAPp+YfvvD4ZHX6kHjyBn2r79fMPgKJYX79cbwc4BGn/Kce9 c7S8L3bF5i9a+Mq8BdLcIemHpVVY/zo4pT/zUNlojR9Kb38Qr0uusea3f0ASUzQKe74e dE95IyRi3LbYbcKMYehpsriZ4prvxWD4bZZnAde2WOLqcHP64uZAB3tlcU6E22q65Zly khBUCvR6qYHCahe0OB4gGi7h/yTmZx1x3uYyOokveTWGPYyqHFYY1LQ2JIn0ieGE9IrG X8Vw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:openpgp:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=9a7fJg7X5ZGewqvjA5LZwm7IjwMkLyF2YEiM5wrvuak=; b=sOkEo+Sbb43QRV8bIlQAnrSrJtlR2eJq2EZ4qAqdlo1cR2qvYoVNK9Q0P2HImHVWYB iRGkSvC9nbWitpL95p+V3jrNBlVZHn7ryVx8U5uKfNfonXvgReFKanapD3gWzb3lYcG/ oui3Fn7yVYvFZHPSORNGjPSXPYy92ELJ1eYuhRARpGVoT2A6FZB5oMAesm8f7ZbAW3Rr C7p2cdubZPiSIoTHYwC3JMimRd54Dw6RpXoJG1QH4dY+pyAqnRjNHi8jrWRjNieGAae9 RsWDftcnicMj8KZ6Hh863+wHUmiHZmPbmGNfLr0pK6Xa/LZ56qZZvaU6ob7x0JrnXp38 pSnw== X-Gm-Message-State: APjAAAVuLQUxeskNg6k7jyrQnbOy5maRMxHWNnfF6WJ4lQXpKq0kLAY4 9Q2E7IJJQUjmE9SntoJDOAUhVA== X-Google-Smtp-Source: APXvYqy2w08FS3+imnEqGsQbtdgQnHHbJcUe8TvJv6cWWPi4fzKZBmD26hwrBQ1WC9GQ7n2su7Atrw== X-Received: by 2002:a1c:dd45:: with SMTP id u66mr4477198wmg.12.1573155550030; Thu, 07 Nov 2019 11:39:10 -0800 (PST) Received: from ?IPv6:2a01:e34:ed2f:f020:85c9:ca0d:aae1:f680? ([2a01:e34:ed2f:f020:85c9:ca0d:aae1:f680]) by smtp.googlemail.com with ESMTPSA id j11sm3163328wrq.26.2019.11.07.11.39.08 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 07 Nov 2019 11:39:09 -0800 (PST) Subject: Re: [PATCH] clocksource: Add driver for the Ingenic JZ47xx OST To: Paul Cercueil Cc: Thomas Gleixner , od@zcrc.me, linux-kernel@vger.kernel.org, Maarten ter Huurne , Mathieu Malaterre , Artur Rojek References: <20190809123824.26025-1-paul@crapouillou.net> <54210a015f148218e11e7f3c1d107192@crapouillou.net> From: Daniel Lezcano Openpgp: preference=signencrypt Autocrypt: addr=daniel.lezcano@linaro.org; prefer-encrypt=mutual; keydata= mQINBFv/yykBEADDdW8RZu7iZILSf3zxq5y8YdaeyZjI/MaqgnvG/c3WjFaunoTMspeusiFE sXvtg3ehTOoyD0oFjKkHaia1Zpa1m/gnNdT/WvTveLfGA1gH+yGes2Sr53Ht8hWYZFYMZc8V 2pbSKh8wepq4g8r5YI1XUy9YbcTdj5mVrTklyGWA49NOeJz2QbfytMT3DJmk40LqwK6CCSU0 9Ed8n0a+vevmQoRZJEd3Y1qXn2XHys0F6OHCC+VLENqNNZXdZE9E+b3FFW0lk49oLTzLRNIq 0wHeR1H54RffhLQAor2+4kSSu8mW5qB0n5Eb/zXJZZ/bRiXmT8kNg85UdYhvf03ZAsp3qxcr xMfMsC7m3+ADOtW90rNNLZnRvjhsYNrGIKH8Ub0UKXFXibHbafSuq7RqyRQzt01Ud8CAtq+w P9EftUysLtovGpLSpGDO5zQ++4ZGVygdYFr318aGDqCljKAKZ9hYgRimPBToDedho1S1uE6F 6YiBFnI3ry9+/KUnEP6L8Sfezwy7fp2JUNkUr41QF76nz43tl7oersrLxHzj2dYfWUAZWXva wW4IKF5sOPFMMgxoOJovSWqwh1b7hqI+nDlD3mmVMd20VyE9W7AgTIsvDxWUnMPvww5iExlY eIC0Wj9K4UqSYBOHcUPrVOKTcsBVPQA6SAMJlt82/v5l4J0pSQARAQABtCpEYW5pZWwgTGV6 Y2FubyA8ZGFuaWVsLmxlemNhbm9AbGluYXJvLm9yZz6JAlcEEwEIAEECGwEFCwkIBwIGFQoJ CAsCBBYCAwECHgECF4ACGQEWIQQk1ibyU76eh+bOW/SP9LjScWdVJwUCXAkeagUJDRnjhwAK CRCP9LjScWdVJ+vYEACStDg7is2JdE7xz1PFu7jnrlOzoITfw05BurgJMqlvoiFYt9tEeUMl zdU2+r0cevsmepqSUVuUvXztN8HA/Ep2vccmWnCXzlE56X1AK7PRRdaQd1SK/eVsJVaKbQTr ii0wjbs6AU1uo0LdLINLjwwItnQ83/ttbf1LheyN8yknlch7jn6H6J2A/ORZECTfJbG4ecVr 7AEm4A/G5nyPO4BG7dMKtjQ+crl/pSSuxV+JTDuoEWUO+YOClg6azjv8Onm0cQ46x9JRtahw YmXdIXD6NsJHmMG9bKmVI0I7o5Q4XL52X6QxkeMi8+VhvqXXIkIZeizZe5XLTYUvFHLdexzX Xze0LwLpmMObFLifjziJQsLP2lWwOfg6ZiH8z8eQJFB8bYTSMqmfTulB61YO0mhd676q17Y7 Z7u3md3CLH7rh61wU1g7FcLm9p5tXXWWaAud9Aa2kne2O3sirO0+JhsKbItz3d9yXuWgv6w3 heOIF0b91JyrY6tjz42hvyjxtHywRr4cdAEQa2S7HeQkw48BQOG6PqQ9d3FYU34pt3WFJ19V A5qqAiEjqc4N0uPkC79W32yLGdyg0EEe8v0Uhs3CxM9euGg37kr5fujMm+akMtR1ENITo+UI fgsxdwjBD5lNb/UGodU4QvPipB/xx4zz7pS5+2jGimfLeoe7mgGJxrkBDQRb/8z6AQgAvSkg 5w7dVCSbpP6nXc+i8OBz59aq8kuL3YpxT9RXE/y45IFUVuSc2kuUj683rEEgyD7XCf4QKzOw +XgnJcKFQiACpYAowhF/XNkMPQFspPNM1ChnIL5KWJdTp0DhW+WBeCnyCQ2pzeCzQlS/qfs3 dMLzzm9qCDrrDh/aEegMMZFO+reIgPZnInAcbHj3xUhz8p2dkExRMTnLry8XXkiMu9WpchHy XXWYxXbMnHkSRuT00lUfZAkYpMP7La2UudC/Uw9WqGuAQzTqhvE1kSQe0e11Uc+PqceLRHA2 bq/wz0cGriUrcCrnkzRmzYLoGXQHqRuZazMZn2/pSIMZdDxLbwARAQABiQI2BBgBCAAgFiEE JNYm8lO+nofmzlv0j/S40nFnVScFAlv/zPoCGwwACgkQj/S40nFnVSf4OhAAhWJPjgUu6VfS mV53AUGIyqpOynPvSaMoGJzhNsDeNUDfV5dEZN8K4qjuz2CTNvGIyt4DE/IJbtasvi5dW4wW Fl85bF6xeLM0qpCaZtXAsU5gzp3uT7ut++nTPYW+CpfYIlIpyOIzVAmw7rZbfgsId2Lj7g1w QCjvGHw19mq85/wiEiZZNHeJQ3GuAr/uMoiaRBnf6wVcdpUTFMXlkE8/tYHPWbW0YKcKFwJ3 uIsNxZUe6coNzYnL0d9GK2fkDoqKfKbFjNhW9TygfeL2Qhk949jMGQudFS3zlwvN9wwVaC0i KC/D303DiTnB0WFPT8CltMAZSbQ1WEWfwqxhY26di3k9pj+X3BfOmDL9GBlnRTSgwjqjqzpG VZsWouuTfXd9ZPPzvYdUBrlTKgojk1C8v4fhSqb+ard+bZcwNp8Tzl/EI9ygw6lYEATGCUYI Wco+fjehCgG1FWvWavMU+jLNs8/8uwj1u+BtRpWFj4ug/VaDDIuiApKPwl1Ge+zoC7TLMtyb c00W5/8EckjmNgLDIINEsOsidMH61ZOlwDKCxo2lbV+Ij078KHBIY76zuHlwonEQaHLCAdqm WiI95pYZNruAJEqZCpvXDdClmBVMZRDRePzSljCvoHxn7ArEt3F14mabn2RRq/hqB8IhC6ny xAEPQIZaxxginIFYEziOjR65AQ0EW//NCAEIALcJqSmQdkt04vIBD12dryF6WcVWYvVwhspt RlZbZ/NZ6nzarzEYPFcXaYOZCOCv+Xtm6hB8fh5XHd7Y8CWuZNDVp3ozuqwTkzQuux/aVdNb Fe4VNeKGN2FK1aNlguAXJNCDNRCpWgRHuU3rWwGUMgentJogARvxfex2/RV/5mzYG/N1DJKt F7g1zEcQD3JtK6WOwZXd+NDyke3tdG7vsNRFjMDkV4046bOOh1BKbWYu8nL3UtWBxhWKx3Pu 1VOBUVwL2MJKW6umk+WqUNgYc2bjelgcTSdz4A6ZhJxstUO4IUfjvYRjoqle+dQcx1u+mmCn 8EdKJlbAoR4NUFZy7WUAEQEAAYkDbAQYAQgAIBYhBCTWJvJTvp6H5s5b9I/0uNJxZ1UnBQJb /80IAhsCAUAJEI/0uNJxZ1UnwHQgBBkBCAAdFiEEGn3N4YVz0WNVyHskqDIjiipP6E8FAlv/ zQgACgkQqDIjiipP6E+FuggAl6lkO7BhTkrRbFhrcjCm0bEoYWnCkQtX9YFvElQeA7MhxznO BY/r1q2Uf6Ifr3YGEkLnME/tQQzUwznydM94CtRJ8KDSa1CxOseEsKq6B38xJtjgYSxNdgQb EIfCzUHIGfk94AFKPdV6pqqSU5VpPUagF+JxiAkoEPOdFiQCULFNRLMsOtG7yp8uSyJRp6Tz cQ+0+1QyX1krcHBUlNlvfdmL9DM+umPtbS9F6oRph15mvKVYiPObI1z8ymHoc68ReWjhUuHc IDQs4w9rJVAyLypQ0p+ySDcTc+AmPP6PGUayIHYX63Q0KhJFgpr1wH0pHKpC78DPtX1a7HGM 7MqzQ4NbD/4oLKKwByrIp12wLpSe3gDQPxLpfGgsJs6BBuAGVdkrdfIx2e6ENnwDoF0Veeji BGrVmjVgLUWV9nUP92zpyByzd8HkRSPNZNlisU4gnz1tKhQl+j6G/l2lDYsqKeRG55TXbu9M LqJYccPJ85B0PXcy63fL9U5DTysmxKQ5RgaxcxIZCM528ULFQs3dfEx5euWTWnnh7pN30RLg a+0AjSGd886Bh0kT1Dznrite0dzYlTHlacbITZG84yRk/gS7DkYQdjL8zgFr/pxH5CbYJDk0 tYUhisTESeesbvWSPO5uNqqy1dAFw+dqRcF5gXIh3NKX0gqiAA87NM7nL5ym/CNpJ7z7nRC8 qePOXubgouxumi5RQs1+crBmCDa/AyJHKdG2mqCt9fx5EPbDpw6Zzx7hgURh4ikHoS7/tLjK iqWjuat8/HWc01yEd8rtkGuUcMqbCi1XhcAmkaOnX8FYscMRoyyMrWClRZEQRokqZIj79+PR adkDXtr4MeL8BaB7Ij2oyRVjXUwhFQNKi5Z5Rve0a3zvGkkqw8Mz20BOksjSWjAF6g9byukl CUVjC03PdMSufNLK06x5hPc/c4tFR4J9cLrV+XxdCX7r0zGos9SzTPGNuIk1LK++S3EJhLFj 4eoWtNhMWc1uiTf9ENza0ntqH9XBWEQ6IA1gubCniGG+XrkBDQRb/80VAQgA8QHL8REXb0Cy 79EKg2lmFl/Vp14kb2yNssurgDbi/+lslAifbBP8uwqkOZ9QAq/DKuF6dfoXoceWjQFbm+Yx 0VICaLdsCdm+QTjZCpqTE/FTg53Ur6GHDKlMurxaT+ItFC2uRGhuog+roLSGBzECfRG0VgPz 5KxiwDl2lXtzE4AQOPzoh8nW7ibvWJ13r7H8h1VkaJRLbGi+hWJ10PYm44ar9ozCLe9/vfdz +t9Z1MYyvHCnzeaej5G2O00jNGuXPjmSgz6nagFVO6RYxt3J6Ru3Xfz7T3FGlCJuGtvejo4K fQb5DRNRsZp3my/qE0ixh2lio79giWTR6dURdYXWGwARAQABiQI2BBgBCAAgFiEEJNYm8lO+ nofmzlv0j/S40nFnVScFAlv/zRUCGyAACgkQj/S40nFnVSdS0g//a5ahjaIt6hbDKb/gmBHO FuB9M/IIU/Ee+tXToWw1igxfXdP+CGS5BGR+myCyDejNilYypm4tQRyPYpNvXjwHFlzvvhNc VkWJeTRx778eyZcx441DgfbQpH3U9OYSg9cobchn7OPiy1gQRNAROb004m0jwk4yldbCmWS6 ovmJkRsdBcyRmpRE4644bbFMULGfPkB9mN3OHPTiUIulLlyXt5PPX68wA4UVjR3vKPAoJekx ulW043tveaNktIhOeObwaJIKaqMvr6EuB9h9akqEAcjAZ/4Y21wawb5aAB9eyx07OdsRZRnV yrfuDuwdn8yDNEyLdVQPcHC2T0eGuiJEDpPGiOtC6XOi+u8AWygw1NaltVyjW1zZt4fu4z5S uRccMjf84wsbC9K9vplNJmgM2c2qvvgn19Lfofw4SIX0BMhpnkKrRMx19wAG0PwrRiS0JVsI op7JpZPGVNqCnAgGujh9ZgvSJchJ2RFXY3jJCq/C/E3venVGlqDprU61Ot1moaBD1Q5igmlT GZae2XlFWBEWfqX3hb8fJbEGIWTRWz0uR2WroDg7vG3k+iLkqQfp61rsVzJNzeF/nGFr1AYg D53Es2aGJyrAeHWCnk9vzsPJoI5k5P1yNjgjA+W6tnOj8Kdpo//uKMYXV6hXkEAtyap6ggsw PASsWZc3OelnWN2JAq0EGAEIACAWIQQk1ibyU76eh+bOW/SP9LjScWdVJwUCXZLIEgIbAgCB CRCP9LjScWdVJ3YgBBkWCAAdFiEEbinX+DPdhovb6oob3uarTi9/eqYFAl2SyBIACgkQ3uar Ti9/eqZ2RgD9HN1UWo90QRDlBisR83Lte2VJyKCS46R3ZDXwZ1lPflIA/28E8ROelnfJEGdn tlE8uATPPdOxbCYAECy+LQ9mGYIMkJoP/RhDJ9TOOlHUacJKRtothMRSzJoe5Y8j+5KkpO1x u22li/5CZiwjAP3wJ4ffPBjReX/V8T0fLn3PpXG/1hVqkvHSc8M4DXMNU2rYye63Edvy34ia PPgRELHKyq19iu+BqjcT+HRzxIR6H5uHkySPCZTwLBnd2hbKJV1QsoRJ7v8azk66EXNoNU8K lZ2wp0IAbJS4//6pFbAoZWlY/RGu3oxMrbght67fERk7xzdc4Rcfl32d/phGoEQiLMB5ygKv TQT1z7oGVFLQCpE5ALf8ybuta1yjf5Y6uJ2pVeSSj0BxnwCIzme7QXwCpgYqDTLu+QvYs4/y 6zzkvSnnsyohHW6AOchOVNjTHhFhFYn36TuV53laydaXK/zgo3NsOpATFObyK3N5lhb1G9tN Lrev/4WVxNr0LPXl9bdCbQGzIQK+kAPcg8u9f2MMhHQiQX8FAjhP3wtACRhfUz9RaQykxiwv y0s5uI05ZSXhqFs9iLlh3zNU1i6J1cdzA8BReoa3cKz4UiGKEffT857iMvT/ZmgSdYY57EgV UWm57SN2ok2Ii8AXlanH5SJPkbwJZhiB7kO0cjebmoA/1SA+5yTc3zEKKFuxcpfiXxt0d/OJ om6jCJ5/uKB5Cz9bJj0WdlvS2Xb11Jrs90MoVa74H5me4jOw7m9Yyg3qExOFOXUPFL6N Message-ID: Date: Thu, 7 Nov 2019 20:39:08 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <54210a015f148218e11e7f3c1d107192@crapouillou.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/11/2019 16:56, Paul Cercueil wrote: > Hi Daniel, > > On 2019-08-16 16:54, Daniel Lezcano wrote: >> On 09/08/2019 14:38, Paul Cercueil wrote: >>> From: Maarten ter Huurne >>> >>> OST is the OS Timer, a 64-bit timer/counter with buffered reading. >>> >>> SoCs before the JZ4770 had (if any) a 32-bit OST; the JZ4770 and >>> JZ4780 have a 64-bit OST. >>> >>> This driver will register both a clocksource and a sched_clock to the >>> system. >>> >>> Signed-off-by: Maarten ter Huurne >>> Signed-off-by: Paul Cercueil >>> Tested-by: Mathieu Malaterre >>> Tested-by: Artur Rojek >>> --- >>> >> >> [ ... ] >> >>> +    err = clocksource_register_hz(cs, rate); >>> +    if (err) { >>> +        dev_err(dev, "clocksource registration failed: %d\n", err); >>> +        clk_disable_unprepare(ost->clk); >>> +        return err; >>> +    } >>> + >>> +    /* Cannot register a sched_clock with interrupts on */ >> >> Aren't they already disabled? > > Sorry for the late reply. > > No, they are not already disabled; this is what I get if I comment out > the local_irq_save()/local_irq_restore(): > > [    0.361014] clocksource: ingenic-ost: mask: 0xffffffff max_cycles: > 0xffffffff, max_idle_ns: 159271703898 ns > [    0.361515] clocksource: Switched to clocksource ingenic-ost > [    0.361686] ------------[ cut here ]------------ > [    0.361893] WARNING: CPU: 0 PID: 1 at kernel/time/sched_clock.c:179 > sched_clock_register+0x7c/0x2e4 > [    0.362174] CPU: 0 PID: 1 Comm: swapper Not tainted 5.4.0-rc5+ #461 > [    0.362330] Stack : 80744558 80069b44 80770000 00000000 00000000 > 00dfd7a7 806e6db4 8106bb74 > [    0.362619]         806f0000 81067ca4 806f31c7 80769478 00000020 > 10000400 8106bb20 00dfd7a7 > [    0.362906]         00000000 00000000 80780000 00000000 00000007 > 00000001 00000049 3563722d > [    0.363191]         8106ba61 00000000 ffffffff 00000010 806f0000 > 00000000 00000000 806f0000 > [    0.363477]         00000020 00000000 80714534 80770000 00000002 > 80319154 00000000 80770000 > [    0.363762]         ... > [    0.363906] Call Trace: > [    0.364087] [<8001af14>] show_stack+0x40/0x128 > [    0.364289] [<8002fd88>] __warn+0xb8/0xe0 > [    0.364478] [<8002fe14>] warn_slowpath_fmt+0x64/0xc0 > [    0.364678] [<8072b1c8>] sched_clock_register+0x7c/0x2e4 > [    0.364895] [<8073c874>] ingenic_ost_probe+0x224/0x248 > [    0.365090] [<803d5394>] platform_drv_probe+0x40/0x94 > [    0.365526] [<803d362c>] really_probe+0x104/0x374 > [    0.365743] [<803d3ff0>] device_driver_attach+0x78/0x80 > [    0.365938] [<803d4070>] __driver_attach+0x78/0x118 > [    0.366129] [<803d1700>] bus_for_each_dev+0x7c/0xc8 > [    0.366318] [<803d226c>] bus_add_driver+0x1bc/0x204 > [    0.366513] [<803d4878>] driver_register+0x84/0x14c > [    0.366717] [<8073a144>] __platform_driver_probe+0x98/0x140 > [    0.366931] [<80724e38>] do_one_initcall+0x84/0x1b4 > [    0.367126] [<807250cc>] kernel_init_freeable+0x164/0x240 > [    0.367318] [<805df75c>] kernel_init+0x10/0xf8 > [    0.367510] [<8001542c>] ret_from_kernel_thread+0x14/0x1c > [    0.367722] ---[ end trace 7fedf00408fa3bed ]--- > [    0.367985] sched_clock: 32 bits at 12MHz, resolution 83ns, wraps > every 178956970966ns > > At kernel/time/sched_clock.c:179 there is: > WARN_ON(!irqs_disabled()); That is strange, no drivers is doing that and no warning is appearing. Isn't missing a local_irq_disable in the code path in the stack above? >>> +    local_irq_save(flags); >>> +    if (soc_info->is64bit) >>> +        sched_clock_register(ingenic_ost_read_cntl, 32, rate); >>> +    else >>> +        sched_clock_register(ingenic_ost_read_cnth, 32, rate); >>> +    local_irq_restore(flags); >>> + >>> +    return 0; >>> +} >>> + -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog