From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8185B3CB57A; Sat, 17 Oct 2026 17:33:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792258428; cv=none; b=DSwowSR8r/ju46wSsDnfScVzLBIjsH3bZEk3fQnFW+E5krH3+S2iI0+RMRjiYJ05eh+0JRR0hL4bSuiiSJPDCbeREGzYxGvjsE9jBznant3l5/RFyXOVGxNhByI5ZMadygdteAf1Z5MYghE/ZrBBfjbKr9QAS0nNdP4uWilirzU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792258428; c=relaxed/simple; bh=GZeAfmPxS3dvRjx00480h+70FFjeon6jtYeyEGwhMPo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YtnXZ87KNwf0vu8Rx0gqzd+6wjg0DZqK2SLC5gBbBa/J58qDQoNm4ADY528RnXvq24wrgejGNmzfQWVlr/Ceu/lDSoe4HTQBxjmMzq2PejhBeopOc1xTRC1DSu1AGeUzMG8ejSP+jKF/jXWR5g99gIpQhDHAb16F5JvtXqqpUYc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ul2eC4ZI; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ul2eC4ZI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D92631F000C4; Sat, 17 Oct 2026 17:33:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792258427; bh=2voDbs/498Srl2L/VjTSdXSFBqTMZFeMH+21haEWWXY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ul2eC4ZIOi4C6wLib43Ni1G9mcwKJUg6eZLITTPmxTt/naBuuIiDJ3oRnLoJfVNVS 300OC2kxyaEmzESfO01+SQlxmeYJnyEFdGzBtHh/vCZpK1YfyZsqMckb7hwgnYtlw5 1VXILAAaGq58+R8EZpo00hcFJ/GL6HYkMLd+G+zI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yu Kuai , Song Liu , Sasha Levin Subject: [PATCH 6.6 0844/1674] md: add new helpers to suspend/resume and lock/unlock array Date: Sat, 17 Oct 2026 17:51:56 +0200 Message-ID: <20261017160452.790614467@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261017160431.119607952@linuxfoundation.org> References: <20261017160431.119607952@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yu Kuai [ Upstream commit f45461e24febab5c2ba8f331e9eb109bb59cbdc1 ] The new helpers suspend the array first and then lock the array, Prepare to refactor from: mddev_lock/lock_nointr mddev_suspend ... mddev_resuem mddev_lock With: mddev_suspend_and_lock/lock_nointr ... mddev_unlock_and_resume After all the use cases is refactored, mddev_suspend/resume() will be removed. And mddev_suspend_and_lock() will also replace mddev_lock() for the case that the array will be reconfigured, in order to synchronize with io to prevent problems in many corner cases. Signed-off-by: Yu Kuai Signed-off-by: Song Liu Link: https://lore.kernel.org/r/20231010151958.145896-6-yukuai1@huaweicloud.com Stable-dep-of: 2cc583653bbe ("md: suspend array while updating raid_disks via sysfs") Signed-off-by: Sasha Levin --- drivers/md/md.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/md/md.h b/drivers/md/md.h index a487e5c0648b5..a2e480ad3861e 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -869,6 +869,33 @@ static inline void mddev_check_write_zeroes(struct mddev *mddev, struct bio *bio mddev->queue->limits.max_write_zeroes_sectors = 0; } +static inline int mddev_suspend_and_lock(struct mddev *mddev) +{ + int ret; + + ret = __mddev_suspend(mddev, true); + if (ret) + return ret; + + ret = mddev_lock(mddev); + if (ret) + __mddev_resume(mddev); + + return ret; +} + +static inline void mddev_suspend_and_lock_nointr(struct mddev *mddev) +{ + __mddev_suspend(mddev, false); + mutex_lock(&mddev->reconfig_mutex); +} + +static inline void mddev_unlock_and_resume(struct mddev *mddev) +{ + mddev_unlock(mddev); + __mddev_resume(mddev); +} + struct mdu_array_info_s; struct mdu_disk_info_s; -- 2.53.0