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=-12.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS 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 0836AC433DF for ; Sun, 2 Aug 2020 19:17:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E63DF20759 for ; Sun, 2 Aug 2020 19:17:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596395870; bh=8mJPcpXajO5FJPo1cyreA1HnNTrVKzaSbh/fZpZHFCE=; h=Date:From:To:Cc:Subject:List-ID:From; b=tKj3PcPbcZPPCQKuzyze2CZA+g0sIdcOrOznRqhdhJjSLjpuDkKh0dWgIqFCs5pra UnJ6tFh0AhOvL9QRC/umNqAhwKrna5xMGyxxu2FiUkeI/6BxphQRiQl4FrK8TunRTY tFaNUKN1A8cM03QTHP7uYRafcNF6vywZw3j6apNA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727788AbgHBTRt (ORCPT ); Sun, 2 Aug 2020 15:17:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53646 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725910AbgHBTRt (ORCPT ); Sun, 2 Aug 2020 15:17:49 -0400 Received: from mail-ed1-x544.google.com (mail-ed1-x544.google.com [IPv6:2a00:1450:4864:20::544]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DDDB7C06174A for ; Sun, 2 Aug 2020 12:17:48 -0700 (PDT) Received: by mail-ed1-x544.google.com with SMTP id i26so22425190edv.4 for ; Sun, 02 Aug 2020 12:17:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:mime-version :content-disposition; bh=/MWOv1sSTDG6A9AwuuN7flNVU2nslDeMJdrP9ZxY9+0=; b=ejggukgQiz/w02fif0Eg3vB6u/i0XIiY72Y0cEGZlKnHEDIbWu/UwadpIXV/FeBXWO KYAcg/CxunoDZj/THTyWHkDe/ZV6rT8FYj2pjTVTFdmR9LKKS81/EDM+hm6i9GRPbhCu pjRKPx7TnA3H6C5q+T8i86Dt5qY70ezYU0E2NrQftt266gzlVeWEAegVBaksd277yt3a NDaBoGnBNj550ppwlqBj3Kr8Gy3NEyylPPSrrIJcZTwK5AbU8xrNO6hKbWeODwgxuazU +YDzVNws7MsY4rgFN/v6xW2ZX+j+yQ5B0PqyGafeo1lOIwQbB+VlbkH+wR8eKTHpCfN2 /bLw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :mime-version:content-disposition; bh=/MWOv1sSTDG6A9AwuuN7flNVU2nslDeMJdrP9ZxY9+0=; b=GYMV4vVuUzRgy8i3HU30K0XNi2GKvKQRAenVk66fTmxLMHom/qG7XDvV09rWzCuGGO z2n0MQGsOh2/sCP1X+nrcjtK3SRibf6QSjgRKr2iaFYBAMg0eWScsLXhq0dyGKqPiD8k 5B0pOMEDgkWc2M8Ah8velSsrvsvRL7V8SVXImrgV25+Xm90gIuP1hi+hmNTKeVikO46e 7e8TixFmkPWsClpJDbMrlKz/vQrw0+xhcknpl9MI+0ERbTFAwcHkCtjgKPbPaL8Gh1sK J/tVI7rtDbw2JeXNdY5zftGmEKYI1e70MZ93nGFM0EKEOIWYwKfWfDpUmrTO+cHWds5s 7a1w== X-Gm-Message-State: AOAM5321V5gLlGDRdbutPbeYjoalEDip6occhflzwvFo1jFQ/nIhNZ8a zVnl8shy8Xg/LHLU92LuFYM= X-Google-Smtp-Source: ABdhPJzghixCS3l2Ffiw3s44pN2CGdioW+nFVMEc5gPe4xX26MyF1O7XK7vd9d3PgGxDT3eor2JRBQ== X-Received: by 2002:aa7:c6ce:: with SMTP id b14mr13252741eds.208.1596395867682; Sun, 02 Aug 2020 12:17:47 -0700 (PDT) Received: from gmail.com (54033286.catv.pool.telekom.hu. [84.3.50.134]) by smtp.gmail.com with ESMTPSA id g6sm14200320ejz.19.2020.08.02.12.17.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 02 Aug 2020 12:17:47 -0700 (PDT) Date: Sun, 2 Aug 2020 21:17:45 +0200 From: Ingo Molnar To: Linus Torvalds Cc: linux-kernel@vger.kernel.org, Thomas Gleixner , Borislav Petkov , Peter Zijlstra , Andrew Morton Subject: [GIT PULL] x86 fix Message-ID: <20200802191745.GA122326@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Linus, Please pull the latest x86/urgent git tree from: git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-urgent-2020-08-02 # HEAD: bdd65589593edd79b6a12ce86b3b7a7c6dae5208 x86/i8259: Use printk_deferred() to prevent deadlock A single fix for a potential deadlock when printing a message about spurious interrupts. Thanks, Ingo ------------------> Thomas Gleixner (1): x86/i8259: Use printk_deferred() to prevent deadlock arch/x86/kernel/i8259.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/i8259.c b/arch/x86/kernel/i8259.c index f3c76252247d..282b4ee1339f 100644 --- a/arch/x86/kernel/i8259.c +++ b/arch/x86/kernel/i8259.c @@ -207,7 +207,7 @@ static void mask_and_ack_8259A(struct irq_data *data) * lets ACK and report it. [once per IRQ] */ if (!(spurious_irq_mask & irqmask)) { - printk(KERN_DEBUG + printk_deferred(KERN_DEBUG "spurious 8259A interrupt: IRQ%d.\n", irq); spurious_irq_mask |= irqmask; }