From patchwork Fri Mar 29 05:46:39 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Kardashevskiy X-Patchwork-Id: 1069165 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=kvm-ppc-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=ozlabs.ru Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44VrMr5Kbpz9sQs for ; Fri, 29 Mar 2019 16:46:48 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727775AbfC2Fqr (ORCPT ); Fri, 29 Mar 2019 01:46:47 -0400 Received: from ozlabs.ru ([107.173.13.209]:45186 "EHLO ozlabs.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726251AbfC2Fqr (ORCPT ); Fri, 29 Mar 2019 01:46:47 -0400 Received: from fstn1-p1.ozlabs.ibm.com (localhost [IPv6:::1]) by ozlabs.ru (Postfix) with ESMTP id E80A0AE80003; Fri, 29 Mar 2019 01:46:45 -0400 (EDT) From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy , David Gibson , kvm-ppc@vger.kernel.org, "Aneesh Kumar K.V" , Paul Mackerras Subject: [PATCH kernel 0/2] powerpc/mm_iommu: Fix potential deadlock Date: Fri, 29 Mar 2019 16:46:39 +1100 Message-Id: <20190329054641.48597-1-aik@ozlabs.ru> X-Mailer: git-send-email 2.17.1 Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org I was trying the kernel with DEBUG_LOCKDEP and saw warnings. 1/2 is preparing the fix to make 2/2 reviewable and 2/2 is the actual fix. This is based on sha1 a3ac7917b730 Linus Torvalds "Revert "parport: daisy: use new parport device model"". Please comment. Thanks. Alexey Kardashevskiy (2): powerpc/mm_iommu: Prepare for less locking powerpc/mm_iommu: Fix potential deadlock arch/powerpc/mm/mmu_context_iommu.c | 186 ++++++++++++++-------------- 1 file changed, 96 insertions(+), 90 deletions(-)