From patchwork Sun Jul 1 09:01:21 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 10498563 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7ED61602D6 for ; Sun, 1 Jul 2018 09:02:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6A2D728852 for ; Sun, 1 Jul 2018 09:02:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5A52628B63; Sun, 1 Jul 2018 09:02:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A631828852 for ; 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Received: from mail.linuxfoundation.org ([140.211.169.12]) by merlin.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fZYFm-000399-2H for linux-arm-kernel@lists.infradead.org; Sun, 01 Jul 2018 09:02:43 +0000 Received: from localhost (LFbn-1-12247-202.w90-92.abo.wanadoo.fr [90.92.61.202]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 0B85EBC1; Sun, 1 Jul 2018 09:02:27 +0000 (UTC) Subject: Patch "lib/vsprintf: Remove atomic-unsafe support for %pCr" has been added to the 4.17-stable tree To: 1527845302-12159-5-git-send-email-geert+renesas@glider.be, baijiaju1990@gmail.com, corbet@lwn.net, edubezval@gmail.com, eric@anholt.net, geert+renesas@glider.be, gregkh@linuxfoundation.org, linux-arm-kernel@lists.infradead.org, mturquette@baylibre.com, pmladek@suse.com, rostedt@goodmis.org, rui.zhang@intel.com, sboyd@kernel.org, sergey.senozhatsky.work@gmail.com, stefan.wahren@i2se.com, torvalds@linux-foundation.org From: Date: Sun, 01 Jul 2018 11:01:21 +0200 Message-ID: <153043568114763@kroah.com> MIME-Version: 1.0 X-stable: commit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180701_050242_256980_22899887 X-CRM114-Status: GOOD ( 13.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: stable-commits@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This is a note to let you know that I've just added the patch titled lib/vsprintf: Remove atomic-unsafe support for %pCr to the 4.17-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: lib-vsprintf-remove-atomic-unsafe-support-for-pcr.patch and it can be found in the queue-4.17 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. From 666902e42fd8344b923c02dc5b0f37948ff4f225 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Fri, 1 Jun 2018 11:28:22 +0200 Subject: lib/vsprintf: Remove atomic-unsafe support for %pCr From: Geert Uytterhoeven commit 666902e42fd8344b923c02dc5b0f37948ff4f225 upstream. "%pCr" formats the current rate of a clock, and calls clk_get_rate(). The latter obtains a mutex, hence it must not be called from atomic context. Remove support for this rarely-used format, as vsprintf() (and e.g. printk()) must be callable from any context. Any remaining out-of-tree users will start seeing the clock's name printed instead of its rate. Reported-by: Jia-Ju Bai Fixes: 900cca2944254edd ("lib/vsprintf: add %pC{,n,r} format specifiers for clocks") Link: http://lkml.kernel.org/r/1527845302-12159-5-git-send-email-geert+renesas@glider.be To: Jia-Ju Bai To: Jonathan Corbet To: Michael Turquette To: Stephen Boyd To: Zhang Rui To: Eduardo Valentin To: Eric Anholt To: Stefan Wahren To: Greg Kroah-Hartman Cc: Sergey Senozhatsky Cc: Petr Mladek Cc: Linus Torvalds Cc: Steven Rostedt Cc: linux-doc@vger.kernel.org Cc: linux-clk@vger.kernel.org Cc: linux-pm@vger.kernel.org Cc: linux-serial@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-renesas-soc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Geert Uytterhoeven Cc: stable@vger.kernel.org # 4.1+ Signed-off-by: Geert Uytterhoeven Signed-off-by: Petr Mladek Signed-off-by: Greg Kroah-Hartman --- Documentation/core-api/printk-formats.rst | 3 +-- lib/vsprintf.c | 3 --- 2 files changed, 1 insertion(+), 5 deletions(-) Patches currently in stable-queue which might be from geert+renesas@glider.be are queue-4.17/lib-vsprintf-remove-atomic-unsafe-support-for-pcr.patch queue-4.17/thermal-bcm2835-stop-using-printk-format-pcr.patch queue-4.17/serial-sh-sci-use-spin_-try-lock_irqsave-instead-of-open-coding-version.patch queue-4.17/clk-renesas-cpg-mssr-stop-using-printk-format-pcr.patch --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst @@ -419,11 +419,10 @@ struct clk %pC pll1 %pCn pll1 - %pCr 1560000000 For printing struct clk structures. %pC and %pCn print the name (Common Clock Framework) or address (legacy clock framework) of the -structure; %pCr prints the current clock rate. +structure. Passed by reference. --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1456,9 +1456,6 @@ char *clock(char *buf, char *end, struct return string(buf, end, NULL, spec); switch (fmt[1]) { - case 'r': - return number(buf, end, clk_get_rate(clk), spec); - case 'n': default: #ifdef CONFIG_COMMON_CLK