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=-9.7 required=3.0 tests=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 1A1C1C432C3 for ; Fri, 15 Nov 2019 03:20:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F347B206F4 for ; Fri, 15 Nov 2019 03:20:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727302AbfKODUr (ORCPT ); Thu, 14 Nov 2019 22:20:47 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:6671 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726549AbfKODUl (ORCPT ); Thu, 14 Nov 2019 22:20:41 -0500 Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 2D31FEB4961799FCF945; Fri, 15 Nov 2019 11:20:38 +0800 (CST) Received: from huawei.com (10.90.53.225) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.439.0; Fri, 15 Nov 2019 11:20:29 +0800 From: yu kuai To: , , , , , , , , CC: , , , , , , Subject: [PATCH 1/3] dcache: add a new enum type for 'dentry_d_lock_class' Date: Fri, 15 Nov 2019 11:27:50 +0800 Message-ID: <1573788472-87426-2-git-send-email-yukuai3@huawei.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1573788472-87426-1-git-send-email-yukuai3@huawei.com> References: <1573788472-87426-1-git-send-email-yukuai3@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.90.53.225] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 'dentry_d_lock_class' can be used for spin_lock_nested in case lockdep confused about two different dentry take the 'd_lock'. However, a single 'DENTRY_D_LOCK_NESTED' may not be enough if more than two dentry are involed. So, and in 'DENTRY_D_LOCK_NESTED_2' Signed-off-by: yu kuai --- include/linux/dcache.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/dcache.h b/include/linux/dcache.h index 10090f1..8eb84ef 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -129,7 +129,8 @@ struct dentry { enum dentry_d_lock_class { DENTRY_D_LOCK_NORMAL, /* implicitly used by plain spin_lock() APIs. */ - DENTRY_D_LOCK_NESTED + DENTRY_D_LOCK_NESTED, + DENTRY_D_LOCK_NESTED_2 }; struct dentry_operations { -- 2.7.4