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 CF0AFC4321A for ; Fri, 28 Jun 2019 09:16:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9FBFA217D4 for ; Fri, 28 Jun 2019 09:16:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ETEUNChR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726817AbfF1JQH (ORCPT ); Fri, 28 Jun 2019 05:16:07 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:33160 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726465AbfF1JQG (ORCPT ); Fri, 28 Jun 2019 05:16:06 -0400 Received: by mail-pf1-f194.google.com with SMTP id x15so2673788pfq.0 for ; Fri, 28 Jun 2019 02:16:06 -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=0pDlxezJgSj1bzWMAfYvDK//QbrYKsC8u1GusQxqtig=; b=ETEUNChR3rA1JeJuT6JgZqCDtHCxW5teYhKcDVryv9tbR3W8R2BozwRvZCnWyunm3r 8kjtMnC3XnZXldd6gAm3FET+4Mh/urlJE5WzmKrr4Z9UdoqD7tKhqBmZU9Q7Qqu6lrgB 5HeQYfrrtdLpRLFDVW9f6sMSOzHIAdHRWQdzIKZ7+lPa56UtTH2bP0D9iqkvPdB8OFns SqHGJFotoyK2LPS/3eGvj+xdu81mlBS0Km7f+hoNvHFHssgJeWE4sHwvDL1Usk+ds1mm 2DujtnxJM0G7iB34U5npwvupatCi+TfoO/UcPRj/C2K69GenWAB0IIojQckTIvRo5hcS ztwg== 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=0pDlxezJgSj1bzWMAfYvDK//QbrYKsC8u1GusQxqtig=; b=NhKKkkIyYGnPEQUPboPJXgjGZtAiZl6+jjzyg7KngEaqvVbqtfCPg3kVgjxf8feNjt QMHXrEWJ4CcL/csaN4X9kcDy16jxmAQOa9x/2qBBBY5poawbNBi/Aep2joIRnrJTubS6 P3cHKbBdUWCufKXljKb7tBXDbN4LGvNvzLH/vBmABOHLCI95IYr2K1806dPe60y/imM1 7wtEBncSyfzykDTlGD6TpzNYhjjHeurZwSU6gop4CGtv8LS0cYokwd0Pc2s49c3Dmlax Fc+ABfnLGgVzpS3ZazfM1iOFo6ly7MnJS3lgQz1flrlA3/rSjat7vA7UdhBrSfjnnCzC RCjw== X-Gm-Message-State: APjAAAUgyTtLhld4FMjbPS4bYVpyLK4VsNa0eUdOQQgqnLjPgx1N3fGg JDhXrUcEp462XBXS1TgxJG0= X-Google-Smtp-Source: APXvYqz+aqBXHvRGZeME4Q858BnoavKwz1S16hDEIMyRAYxEWhG5nzoNKvxHgNa8q4dhw9YwDQpMkA== X-Received: by 2002:a65:57ca:: with SMTP id q10mr8641263pgr.52.1561713366187; Fri, 28 Jun 2019 02:16:06 -0700 (PDT) Received: from localhost.localdomain ([203.100.54.194]) by smtp.gmail.com with ESMTPSA id x65sm1754521pfd.139.2019.06.28.02.16.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 28 Jun 2019 02:16:05 -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 05/30] locking/lockdep: Add lock chain list_head field in struct lock_list and lock_chain Date: Fri, 28 Jun 2019 17:15:03 +0800 Message-Id: <20190628091528.17059-6-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 A direct lock dependency, such as L1 -> L2, may be in many lock chains. These newly added fields in struct lock_list and lock_chain will be used to associate lock chains to lock dependencies. No functional change. Signed-off-by: Yuyang Du --- include/linux/lockdep.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index 151d557..3c6fb63 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -191,6 +191,7 @@ static inline void lockdep_copy_map(struct lockdep_map *to, */ struct lock_list { struct list_head entry; + struct list_head chains; struct lock_class *class; struct lock_class *links_to; struct lock_trace trace; @@ -210,6 +211,7 @@ struct lock_list { * @depth: the number of held locks in this chain * @base: the index in chain_hlocks for this chain * @entry: the collided lock chains in lock_chain hash list + * @chain_entry: the link to the next lock_chain in the same dependency * @chain_key: the hash key of this lock_chain */ struct lock_chain { @@ -219,6 +221,7 @@ struct lock_chain { base : 24; /* 4 byte hole */ struct hlist_node entry; + struct list_head chain_entry; u64 chain_key; }; -- 1.8.3.1