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=-19.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 361A7C433E0 for ; Thu, 21 Jan 2021 07:51:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F07C22313E for ; Thu, 21 Jan 2021 07:51:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727717AbhAUHvH (ORCPT ); Thu, 21 Jan 2021 02:51:07 -0500 Received: from mail.kernel.org ([198.145.29.99]:36844 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726652AbhAUG6O (ORCPT ); Thu, 21 Jan 2021 01:58:14 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id CE73E2396D; Thu, 21 Jan 2021 06:57:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1611212228; bh=YHbzxdhpG02t8cJd6mky5l0pwml7Rhb1efMcLMa9ZyA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GgM20hSFY4iNBf7iiMo9nGiigCLZU8NdvnPkgsmx8lKTcI0mwVIQ5dCXTBFwlqxoI xNN8lYs04nmIiUwYfUVUttpTFgjdvJXHw9anygN3tzo/dstrZrPFNYdR6FivE3FdcM N+ofd3H7sdEgPlF8+8JhjOAMkhcXyKUewoEXNUFkzYfMQcxWnbpTDgh2hDHkWzC0Oz Jan1/Kgtk3snmNK+ff0mvwquCTe64YA412yweaIWLX2waok/DpRmxbHkz0S8OT3BEl ZZ32mFEHK9XnYe+1mYcEjoNwbUj3hUn3ULTHBdAeEc9MH2HTx0M95d8Oop8FmRGYtN aZWz3oxyzq4jg== From: guoren@kernel.org To: guoren@kernel.org Cc: linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, Guo Ren Subject: [PATCH 15/29] csky: Fixup update_mmu_cache called with user io mapping Date: Thu, 21 Jan 2021 14:53:35 +0800 Message-Id: <20210121065349.3188251-15-guoren@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210121065349.3188251-1-guoren@kernel.org> References: <20210121065349.3188251-1-guoren@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Guo Ren The function update_mmu_cache could be called by user-io mapping. There is no space of struct page in mem_map for the pte. Just ignore the user-io mmaping in update_mmu_cache. Signed-off-by: Guo Ren --- arch/csky/abiv2/cacheflush.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/csky/abiv2/cacheflush.c b/arch/csky/abiv2/cacheflush.c index 790f1ebfba44..39c51399dd81 100644 --- a/arch/csky/abiv2/cacheflush.c +++ b/arch/csky/abiv2/cacheflush.c @@ -12,6 +12,9 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, unsigned long addr; struct page *page; + if (!pfn_valid(pte_pfn(*pte))) + return; + page = pfn_to_page(pte_pfn(*pte)); if (page == ZERO_PAGE(0)) return; -- 2.17.1