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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 DED85C43461 for ; Sun, 13 Sep 2020 09:25:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A1C78206E6 for ; Sun, 13 Sep 2020 09:25:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725925AbgIMJZs (ORCPT ); Sun, 13 Sep 2020 05:25:48 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:54198 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725899AbgIMJZq (ORCPT ); Sun, 13 Sep 2020 05:25:46 -0400 Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 0B259FE527167674B4E2; Sun, 13 Sep 2020 17:25:41 +0800 (CST) Received: from huawei.com (10.175.104.175) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.487.0; Sun, 13 Sep 2020 17:25:32 +0800 From: Miaohe Lin To: , , , , , , , , , , CC: , Subject: [PATCH] fork: Use helper function mapping_allow_writable() in dup_mmap() Date: Sun, 13 Sep 2020 05:24:15 -0400 Message-ID: <20200913092415.24408-1-linmiaohe@huawei.com> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.104.175] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use helper function mapping_allow_writable() to atomic_inc i_mmap_writable. Signed-off-by: Miaohe Lin --- kernel/fork.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/fork.c b/kernel/fork.c index 4b328aecabb2..a0586716e327 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -558,7 +558,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm, atomic_dec(&inode->i_writecount); i_mmap_lock_write(mapping); if (tmp->vm_flags & VM_SHARED) - atomic_inc(&mapping->i_mmap_writable); + mapping_allow_writable(mapping); flush_dcache_mmap_lock(mapping); /* insert tmp into the share list, just after mpnt */ vma_interval_tree_insert_after(tmp, mpnt, -- 2.19.1