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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 54C11C48BC2 for ; Mon, 21 Jun 2021 10:24:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3D84D611CE for ; Mon, 21 Jun 2021 10:24:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230189AbhFUK0U (ORCPT ); Mon, 21 Jun 2021 06:26:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59184 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230152AbhFUK0T (ORCPT ); Mon, 21 Jun 2021 06:26:19 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6301EC061574 for ; Mon, 21 Jun 2021 03:24:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=IwaY6kI/v3OjEcexd7f9MhRoW5alapc3msr92jaBKD0=; b=hr9VHI8iOA7tdZwEElN+DZ74Bv KLkeTpkNeH+ECFhyg12BjgYhkG25vLvnF9StHU4Y1eMaQ7x5v0r33jPN0tA2wkcol1rUz4OGSdles 6mApBUyJCvWeI2cjwx/bmpaWaEoHhRZgvHXHG1Icm9vl7WTmH/QMIpONP/vC73iZrW/9ScBYiPEy1 e0himXQQf609vZszoS6ZBJ5kPTCSajoSVZYj7F4XYeXVxkPRfd9ZEUqAIDrGWSBLCeuENtn71v5Wy biIhFY+3M+zt1r/DsSeg8QOwcJjjBKcpens1SNSRdke6pvAkl3G5H7ft8yxAuFlkm5WYdr5t8mwBf hPXrhJLg==; Received: from 089144193030.atnat0002.highway.a1.net ([89.144.193.30] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1lvH5R-00CyqV-PP; Mon, 21 Jun 2021 10:23:29 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Tetsuo Handa , linux-block@vger.kernel.org Subject: [PATCH 2/9] loop: reduce loop_ctl_mutex coverage in loop_exit Date: Mon, 21 Jun 2021 12:15:40 +0200 Message-Id: <20210621101547.3764003-3-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210621101547.3764003-1-hch@lst.de> References: <20210621101547.3764003-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org loop_ctl_mutex is only needed to iterate the IDR for removing the loop devices, so reduce the coverage. Signed-off-by: Christoph Hellwig --- drivers/block/loop.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/block/loop.c b/drivers/block/loop.c index 44fa27c54ac2..9df9fb490f87 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -2380,13 +2380,14 @@ static int loop_exit_cb(int id, void *ptr, void *data) static void __exit loop_exit(void) { - mutex_lock(&loop_ctl_mutex); unregister_blkdev(LOOP_MAJOR, "loop"); misc_deregister(&loop_misc); + mutex_lock(&loop_ctl_mutex); idr_for_each(&loop_index_idr, &loop_exit_cb, NULL); - idr_destroy(&loop_index_idr); mutex_unlock(&loop_ctl_mutex); + + idr_destroy(&loop_index_idr); } module_init(loop_init); -- 2.30.2