From patchwork Sun Sep 13 09:28:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miaohe Lin X-Patchwork-Id: 11772283 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 15B1F92C for ; Sun, 13 Sep 2020 09:30:12 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 6D60120829 for ; Sun, 13 Sep 2020 09:30:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6D60120829 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9D64D6B0002; Sun, 13 Sep 2020 05:30:10 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 986AC6B0037; Sun, 13 Sep 2020 05:30:10 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 89D096B0055; Sun, 13 Sep 2020 05:30:10 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0132.hostedemail.com [216.40.44.132]) by kanga.kvack.org (Postfix) with ESMTP id 750CB6B0002 for ; Sun, 13 Sep 2020 05:30:10 -0400 (EDT) Received: from smtpin06.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 288FF182AD9CB for ; Sun, 13 Sep 2020 09:30:10 +0000 (UTC) X-FDA: 77257516980.06.pen63_3c04732270fe Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin06.hostedemail.com (Postfix) with ESMTP id EA83710655DAE for ; Sun, 13 Sep 2020 09:30:09 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,linmiaohe@huawei.com,,RULES_HIT:30054,0,RBL:45.249.212.32:@huawei.com:.lbl8.mailshell.net-62.18.2.100 64.95.201.95;04yry3yrzqb4ecet77wfjddfbjpxhocfoqy81kjwyggwbi6ywib5cjkadscctag.n4ktn1wjyuuysg9bcwcfhag4f5cd4h8hss1iuu6d5znzhb4je4n7bs8cht7odfq.1-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: pen63_3c04732270fe X-Filterd-Recvd-Size: 1714 Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) by imf28.hostedemail.com (Postfix) with ESMTP for ; Sun, 13 Sep 2020 09:30:09 +0000 (UTC) Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 6009F797E9B7686821C7; Sun, 13 Sep 2020 17:30:04 +0800 (CST) Received: from huawei.com (10.175.104.175) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.487.0; Sun, 13 Sep 2020 17:29:54 +0800 From: Miaohe Lin To: CC: , , Subject: [PATCH] mm: mmap: Use helper function allow_write_access() in __remove_shared_vm_struct() Date: Sun, 13 Sep 2020 05:28:38 -0400 Message-ID: <20200913092838.27724-1-linmiaohe@huawei.com> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 X-Originating-IP: [10.175.104.175] X-CFilter-Loop: Reflected X-Rspamd-Queue-Id: EA83710655DAE X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Use helper function allow_write_access() to atomic_inc the i_writecount. Signed-off-by: Miaohe Lin --- mm/mmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/mmap.c b/mm/mmap.c index 80ea11bf12fa..a22f1a2fc82e 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -143,7 +143,7 @@ static void __remove_shared_vm_struct(struct vm_area_struct *vma, struct file *file, struct address_space *mapping) { if (vma->vm_flags & VM_DENYWRITE) - atomic_inc(&file_inode(file)->i_writecount); + allow_write_access(file); if (vma->vm_flags & VM_SHARED) mapping_unmap_writable(mapping);