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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,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 8BBD6C04AB1 for ; Mon, 13 May 2019 09:13:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 589B020989 for ; Mon, 13 May 2019 09:13:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="eavWDj0t" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728694AbfEMJNn (ORCPT ); Mon, 13 May 2019 05:13:43 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:34226 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728669AbfEMJNk (ORCPT ); Mon, 13 May 2019 05:13:40 -0400 Received: by mail-pg1-f193.google.com with SMTP id c13so6465893pgt.1 for ; Mon, 13 May 2019 02:13:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=SdiRF7cmY2+TjzGTcChzgzJlbCutxASQzMbp0ZC+13I=; b=eavWDj0tkUpwBOJomcDBEsvxr77LpmthAm3l0tEiRxVYetXL3d7CuGVCqPzsujS7eg C75jZS83QZwYtmtJMrMRTcmlbyLULKuJ+iehtf8Pp4weDgssbxm67c+3dcc32L1tNt/+ C2VYQxAFmCAzIueiGAOsdpxz1GII8McQRY8dm5XTUwHhV1uWSt50NAg0IjomIC3S9WmG 6iNvA1XvHhHvwS+H9v7KfDY3zRVe1BEvQBgQBp+WS2R3a0NxiKNy4Ec+XJx6DpWeybfS LuAthLCx/pZBvN9Lrhs/wB1//ujwrLBlic5JPpcixe7iz3M/pdWXQEEVaBYjClMDUDPQ 3izw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=SdiRF7cmY2+TjzGTcChzgzJlbCutxASQzMbp0ZC+13I=; b=aFgNRLC20drlCjk7sfzjBpATO6PMAcy645RSfE7elKqp5sWVbjb7Dz4ioQslAG1aqs qZRZl7QFBcU5ORHTtCGUD6EQtqG3Mid9LrBaYj7rOtIRuhv3rO7udUzwUYNcbsEma6FF 5l1wySNfctAGO+6AHFUUJkCchAi2Xi6o4xG+ZhxGZZse+NLlIWh60Tf2s/QtW6dvVCGK UIb81QKq7PeprB75+ghdLweMUbqHU6OeeCytwUgcmfM/11DqHeKQKJTb6bSk70um4A2U WwmHaILmzkZ65RJCElGnz6WM8AbCPZwen1LvBJX66Mst+pb5uI0bMFeFxR//vym4X164 2TMQ== X-Gm-Message-State: APjAAAUSa0HlWobL+RseynyVLYo+nK/e7vlZ4dvs/BhJs/xNVefpFJBo 7Gwu7NcNCmMSy6qmflY4Wa0= X-Google-Smtp-Source: APXvYqxMOAyKXOC8AZDyaR9eBcLFEXpgTtCDZhK62zE4wfBweys2zm+z9BYmgltRGYqgA/VXDL40Yw== X-Received: by 2002:a65:44c8:: with SMTP id g8mr29987962pgs.443.1557738820456; Mon, 13 May 2019 02:13:40 -0700 (PDT) Received: from localhost.localdomain ([203.100.54.194]) by smtp.gmail.com with ESMTPSA id n18sm35500837pfi.48.2019.05.13.02.13.37 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 13 May 2019 02:13:40 -0700 (PDT) From: Yuyang Du To: peterz@infradead.org, will.deacon@arm.com, mingo@kernel.org Cc: bvanassche@acm.org, ming.lei@redhat.com, frederic@kernel.org, tglx@linutronix.de, boqun.feng@gmail.com, linux-kernel@vger.kernel.org, Yuyang Du Subject: [PATCH 07/17] locking/lockdep: Introduce mark_lock_unaccessed() Date: Mon, 13 May 2019 17:11:53 +0800 Message-Id: <20190513091203.7299-8-duyuyang@gmail.com> X-Mailer: git-send-email 2.20.1 (Apple Git-117) In-Reply-To: <20190513091203.7299-1-duyuyang@gmail.com> References: <20190513091203.7299-1-duyuyang@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Since in graph search, multiple matches may be needed, a matched lock needs to rejoin the search for another match, thereby introduce mark_lock_unaccessed(). Signed-off-by: Yuyang Du --- kernel/locking/lockdep.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 4d96bdd..a2d5148 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -1338,6 +1338,15 @@ static inline void mark_lock_accessed(struct lock_list *lock, lock->class->dep_gen_id = lockdep_dependency_gen_id; } +static inline void mark_lock_unaccessed(struct lock_list *lock) +{ + unsigned long nr; + + nr = lock - list_entries; + WARN_ON(nr >= ARRAY_SIZE(list_entries)); /* Out-of-bounds, input fail */ + lock->class->dep_gen_id--; +} + static inline unsigned long lock_accessed(struct lock_list *lock) { unsigned long nr; -- 1.8.3.1