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=-7.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 49BA7C433E0 for ; Fri, 7 Aug 2020 06:19:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 22B3A22D07 for ; Fri, 7 Aug 2020 06:19:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596781151; bh=t5PucQZuKToNKwVENT0iXxoiOqnhQXXF6xvuCDnnKj4=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=BNliMvAu1z7JFgB5dMqi/f5ADlCQ1kmqOmL9Bw9vHWnwzbilePcRLwfTC1v54LboJ 6knjMKezpX7wJcHdYVepHNMPq247LVUqn6dl/o82CSshcOmJMUpLVXvLYOdp8q0TK6 zmapCwcDMgn00Qa+DpT0IfEpX8EFHE6v9XIL3N+c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726205AbgHGGTK (ORCPT ); Fri, 7 Aug 2020 02:19:10 -0400 Received: from mail.kernel.org ([198.145.29.99]:54694 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725379AbgHGGTK (ORCPT ); Fri, 7 Aug 2020 02:19:10 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E26932177B; Fri, 7 Aug 2020 06:19:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596781150; bh=t5PucQZuKToNKwVENT0iXxoiOqnhQXXF6xvuCDnnKj4=; h=Date:From:To:Subject:In-Reply-To:From; b=k8WeoTUVc4zSsbLPRavwgmy7nAG3F0u2TnPjKmiphcQazY5jfvPQtArkezWLsR09U wQ1ITzXzSDOyNwp2XUYGukaGVs2nAA22Sk9JP78K4B6LiUYAplDA15cCGmT86gi4A+ 7fN6M3xsuHL5iPyskU7dsM0Kdn03SpG+lCcpn8EU= Date: Thu, 06 Aug 2020 23:19:09 -0700 From: Andrew Morton To: akpm@linux-foundation.org, bigeasy@linutronix.de, cl@linux.com, iamjoonsoo.kim@lge.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, penberg@kernel.org, rientjes@google.com, tglx@linutronix.de, torvalds@linux-foundation.org, yuzhao@google.com Subject: [patch 038/163] mm/slub.c: drop lockdep_assert_held() from put_map() Message-ID: <20200807061909.ouNDTlYfw%akpm@linux-foundation.org> In-Reply-To: <20200806231643.a2711a608dd0f18bff2caf2b@linux-foundation.org> User-Agent: s-nail v14.8.16 Sender: mm-commits-owner@vger.kernel.org Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: Sebastian Andrzej Siewior Subject: mm/slub.c: drop lockdep_assert_held() from put_map() There is no point in using lockdep_assert_held() unlock that is about to be unlocked. It works only with lockdep and lockdep will complain if spin_unlock() is used on a lock that has not been locked. Remove superfluous lockdep_assert_held(). Link: http://lkml.kernel.org/r/20200618201234.795692-2-bigeasy@linutronix.de Signed-off-by: Sebastian Andrzej Siewior Cc: Yu Zhao Cc: Christopher Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Cc: Thomas Gleixner Signed-off-by: Andrew Morton --- mm/slub.c | 2 -- 1 file changed, 2 deletions(-) --- a/mm/slub.c~slub-drop-lockdep_assert_held-from-put_map +++ a/mm/slub.c @@ -473,8 +473,6 @@ static unsigned long *get_map(struct kme static void put_map(unsigned long *map) __releases(&object_map_lock) { VM_BUG_ON(map != object_map); - lockdep_assert_held(&object_map_lock); - spin_unlock(&object_map_lock); } _