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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,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 2CACAC46460 for ; Tue, 14 Aug 2018 07:33:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E05E821706 for ; Tue, 14 Aug 2018 07:33:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E05E821706 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732167AbeHNKTl (ORCPT ); Tue, 14 Aug 2018 06:19:41 -0400 Received: from mx2.suse.de ([195.135.220.15]:54256 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1731228AbeHNKTI (ORCPT ); Tue, 14 Aug 2018 06:19:08 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 1B4DDAF5B; Tue, 14 Aug 2018 07:33:10 +0000 (UTC) From: Hannes Reinecke To: Jens Axboe Cc: Christoph Hellwig , Sagi Grimberg , Keith Busch , Bart van Assche , linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, Linux Kernel Mailinglist , Hannes Reinecke , Hannes Reinecke , Minchan Kim , Nitin Gupta Subject: [PATCH 4/5] zram: register default groups with device_add_disk() Date: Tue, 14 Aug 2018 09:33:04 +0200 Message-Id: <20180814073305.87255-5-hare@suse.de> X-Mailer: git-send-email 2.12.3 In-Reply-To: <20180814073305.87255-1-hare@suse.de> References: <20180814073305.87255-1-hare@suse.de> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Register default sysfs groups during device_add-disk() to avoid a race condition with udev during startup. Signed-off-by: Hannes Reinecke Cc: Minchan Kim Cc: Nitin Gupta Reviewed-by: Christoph Hellwig --- drivers/block/zram/zram_drv.c | 28 +++++++--------------------- 1 file changed, 7 insertions(+), 21 deletions(-) diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 2907a8156aaf..fc3626cb7fe5 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -1618,6 +1618,11 @@ static const struct attribute_group zram_disk_attr_group = { .attrs = zram_disk_attrs, }; +static const struct attribute_group *zram_disk_attr_groups[] = { + &zram_disk_attr_group, + NULL, +}; + /* * Allocate and initialize new zram device. the function returns * '>= 0' device_id upon success, and negative value otherwise. @@ -1698,24 +1703,14 @@ static int zram_add(void) zram->disk->queue->backing_dev_info->capabilities |= (BDI_CAP_STABLE_WRITES | BDI_CAP_SYNCHRONOUS_IO); - add_disk(zram->disk); - - ret = sysfs_create_group(&disk_to_dev(zram->disk)->kobj, - &zram_disk_attr_group); - if (ret < 0) { - pr_err("Error creating sysfs group for device %d\n", - device_id); - goto out_free_disk; - } + device_add_disk(NULL, zram->disk, zram_disk_attr_groups); + strlcpy(zram->compressor, default_compressor, sizeof(zram->compressor)); zram_debugfs_register(zram); pr_info("Added device: %s\n", zram->disk->disk_name); return device_id; -out_free_disk: - del_gendisk(zram->disk); - put_disk(zram->disk); out_free_queue: blk_cleanup_queue(queue); out_free_idr: @@ -1744,15 +1739,6 @@ static int zram_remove(struct zram *zram) mutex_unlock(&bdev->bd_mutex); zram_debugfs_unregister(zram); - /* - * Remove sysfs first, so no one will perform a disksize - * store while we destroy the devices. This also helps during - * hot_remove -- zram_reset_device() is the last holder of - * ->init_lock, no later/concurrent disksize_store() or any - * other sysfs handlers are possible. - */ - sysfs_remove_group(&disk_to_dev(zram->disk)->kobj, - &zram_disk_attr_group); /* Make sure all the pending I/O are finished */ fsync_bdev(bdev); -- 2.12.3