From nobody Tue Jun 30 03:38:54 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C03CBC28CF5 for ; Wed, 26 Jan 2022 13:30:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240149AbiAZNaq (ORCPT ); Wed, 26 Jan 2022 08:30:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44510 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239585AbiAZNac (ORCPT ); Wed, 26 Jan 2022 08:30:32 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3C30CC061749; Wed, 26 Jan 2022 05:30:32 -0800 (PST) Date: Wed, 26 Jan 2022 13:30:29 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1643203830; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=3I4ChLYHGk093NXNmLne78ptnuGfPC6K8VKoX3iLCws=; b=1+QGhL8uyD8Owf1iU2s9QrNIQkeknAntZfAZDdVQX2j0Nnjj8ENXb/93Rmtl1VOPFknlUH EwyTXUQGwOianBgm9fFhJOzBxl/kdNgZAdNPVsPJG/40Xa2Hvo0VWLo6i/tWmTT0BkXpc8 G9B1+7LJ3P/wDWF3fBgqracGJHEkezdbrpuNlHPvKIpQrokIz5vpouPL/z+SNJ9gfTd+Sw 0dp+080v9Cu0GvF0tIYV35alycXVDTWI5Iazcr0pHdgNXruYH+v/6hjTQSQbhckzY8Wo/Y DnKsd/YPr/Dx8+T/hdVZg3cTC6nhgqqqbW34+0s+DITYX/+/OBPF6/jkEDx5iw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1643203830; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=3I4ChLYHGk093NXNmLne78ptnuGfPC6K8VKoX3iLCws=; b=CT4f5htCUHBtN8X4h6jvEvdraU9laUqugPhKYOYrOl2b7YpdbEPjspWR6X/3qzx7cPQvKf gqSDk+5OOS+DSyDg== From: "tip-bot2 for Xiu Jianfeng" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: locking/core] lockdep: Use memset_startat() helper in reinit_class() Cc: Xiu Jianfeng , "Peter Zijlstra (Intel)" , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20211213132618.105737-1-xiujianfeng@huawei.com> References: <20211213132618.105737-1-xiujianfeng@huawei.com> MIME-Version: 1.0 Message-ID: <164320382983.16921.16443534509567100814.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the locking/core branch of tip: Commit-ID: e204193b138af347fbbbe026e68cb3385112f387 Gitweb: https://git.kernel.org/tip/e204193b138af347fbbbe026e68cb3385= 112f387 Author: Xiu Jianfeng AuthorDate: Mon, 13 Dec 2021 21:26:18 +08:00 Committer: Peter Zijlstra CommitterDate: Tue, 25 Jan 2022 22:30:27 +01:00 lockdep: Use memset_startat() helper in reinit_class() use memset_startat() helper to simplify the code, there is no functional change in this patch. Signed-off-by: Xiu Jianfeng Signed-off-by: Peter Zijlstra (Intel) Link: https://lkml.kernel.org/r/20211213132618.105737-1-xiujianfeng@huawei.= com --- kernel/locking/lockdep.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 4a882f8..89b3df5 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -6011,13 +6011,10 @@ static void zap_class(struct pending_free *pf, stru= ct lock_class *class) =20 static void reinit_class(struct lock_class *class) { - void *const p =3D class; - const unsigned int offset =3D offsetof(struct lock_class, key); - WARN_ON_ONCE(!class->lock_entry.next); WARN_ON_ONCE(!list_empty(&class->locks_after)); WARN_ON_ONCE(!list_empty(&class->locks_before)); - memset(p + offset, 0, sizeof(*class) - offset); + memset_startat(class, 0, key); WARN_ON_ONCE(!class->lock_entry.next); WARN_ON_ONCE(!list_empty(&class->locks_after)); WARN_ON_ONCE(!list_empty(&class->locks_before));