linux-kernel - [PATCH v2 3/5] md: use md_thread api to wake up sync

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Date:   Wed, 15 Mar 2023 14:18:08 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     agk@...hat.com, snitzer@...nel.org, song@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
        yukuai3@...wei.com, yukuai1@...weicloud.com, yi.zhang@...wei.com,
        yangerkun@...wei.com
Subject: [PATCH v2 3/5] md: use md_thread api to wake up sync_thread

From: Yu Kuai <yukuai3@...wei.com>

Instead of wake_up_process() directly, convert to use
md_wakeup_thread().

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 drivers/md/md.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 97e87df4ee43..4ecfd0508afb 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -6267,10 +6267,12 @@ static int md_set_readonly(struct mddev *mddev, struct block_device *bdev)
 	}
 	if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
 		set_bit(MD_RECOVERY_INTR, &mddev->recovery);
-	if (mddev->sync_thread)
-		/* Thread might be blocked waiting for metadata update
-		 * which will now never happen */
-		wake_up_process(mddev->sync_thread->tsk);
+
+	/*
+	 * Thread might be blocked waiting for metadata update
+	 * which will now never happen
+	 */
+	md_wakeup_thread(&mddev->sync_thread, mddev);
 
 	if (mddev->external && test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags))
 		return -EBUSY;
@@ -6331,10 +6333,12 @@ static int do_md_stop(struct mddev *mddev, int mode,
 	}
 	if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
 		set_bit(MD_RECOVERY_INTR, &mddev->recovery);
-	if (mddev->sync_thread)
-		/* Thread might be blocked waiting for metadata update
-		 * which will now never happen */
-		wake_up_process(mddev->sync_thread->tsk);
+
+	/*
+	 * Thread might be blocked waiting for metadata update
+	 * which will now never happen
+	 */
+	md_wakeup_thread(&mddev->sync_thread, mddev);
 
 	mddev_unlock(mddev);
 	wait_event(resync_wait, (mddev->sync_thread == NULL &&
-- 
2.31.1