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=-8.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,HK_RANDOM_FROM,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,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 BFE12C4321A for ; Fri, 28 Jun 2019 09:17:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 948932133F for ; Fri, 28 Jun 2019 09:17:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="By4INT2v" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727113AbfF1JRd (ORCPT ); Fri, 28 Jun 2019 05:17:33 -0400 Received: from mail-pf1-f195.google.com ([209.85.210.195]:38798 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726658AbfF1JRb (ORCPT ); Fri, 28 Jun 2019 05:17:31 -0400 Received: by mail-pf1-f195.google.com with SMTP id y15so2672174pfn.5 for ; Fri, 28 Jun 2019 02:17:31 -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=H/MU7PygK8zh6vt4JAY4lXOfHMWy9RR6BrwI8h0UwRU=; b=By4INT2vAEDcFvmjebojzKfSO1h91NuEbQ/dYkSfXpTY6XtaYe6DFOAQOw7p6foyjJ M9S7443E5Hv+3qdSLyaAqFRKjkZxNAYx/CQ9E02TqwFKIjyLJCOBZIkIu1d4sYUdV92j d1gMDu/4nRqqYR89PVlzojoElPtGNHGMwDlQ9Ig9xYBAEzHfTYcHrtuZwSJ8nazM0IXl /2UTRL+pyGqJOQxu4Zv9H5lovFyeTVuF9Nq6NQ8IXddMqQH4nX4Lg1D+vOa/H4M8Qhpu D0ja6p0XvNUtiJZ63oY0ZF565d0Fg/ZKmDru2hJr69J7FadTy0ZwQnWj5aY4PkfO3BLw GBrQ== 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=H/MU7PygK8zh6vt4JAY4lXOfHMWy9RR6BrwI8h0UwRU=; b=gV6sr61LMnOxFQpR5Pyh8fetmXza8EiHGvpNB3BZLf8VK0jj1OFzf9RNTHvwnfXCsI 58kEQPdIyxv5wx6cbfZGLfRLgNLhKQ35ZvB57l/ECwqzPuucr9J+vBT+dx3IZB8ZIYdi 28ArdHISsXmKg0jYsD6GvAlb0EkLI1LwrThTvLo9Cbpza6WXloC+3g+8Vc6gtiHPcSqI k90vzrMMfPWco3/4ZbRNRQf1QJHruPjqSC4S61zyoO4eO/z/72nl+VKQ4bLPZ/bGdcEC icqpGZxdCBJgfAMfRjR30JExbD876EdJGbUX1hahulNZIHlGncmBm60NWZgrtzGL25yQ lOQA== X-Gm-Message-State: APjAAAVPAQVLPsnUGd+9ugOhdukuQ1szYdkvnc+dDhm9AusieiuQV9xr /IJg0zHRZHpeTptNVW8hLts= X-Google-Smtp-Source: APXvYqzNVezJw0OGnz0SXX+WyseNaqlSLtlv7rUH8yyYnlGdMmgCzMF2kNrrkaONvmfs1UowoOCfQA== X-Received: by 2002:a17:90a:9a95:: with SMTP id e21mr11587737pjp.98.1561713450983; Fri, 28 Jun 2019 02:17:30 -0700 (PDT) Received: from localhost.localdomain ([203.100.54.194]) by smtp.gmail.com with ESMTPSA id x65sm1754521pfd.139.2019.06.28.02.17.26 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 28 Jun 2019 02:17:30 -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, linux-kernel@vger.kernel.org, longman@redhat.com, paulmck@linux.vnet.ibm.com, boqun.feng@gmail.com, Yuyang Du Subject: [PATCH v3 24/30] locking/lockdep: Introduce mark_lock_unaccessed() Date: Fri, 28 Jun 2019 17:15:22 +0800 Message-Id: <20190628091528.17059-25-duyuyang@gmail.com> X-Mailer: git-send-email 2.20.1 (Apple Git-117) In-Reply-To: <20190628091528.17059-1-duyuyang@gmail.com> References: <20190628091528.17059-1-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 444eb62..e7610d2 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -1449,6 +1449,15 @@ static inline void mark_lock_accessed(struct lock_list *lock, lock->class[forward]->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 */ + fw_dep_class(lock)->dep_gen_id--; +} + static inline unsigned long lock_accessed(struct lock_list *lock, int forward) { unsigned long nr; -- 1.8.3.1