From fdd0c6a649d24107bbadd249c87feab67b9037c5 Mon Sep 17 00:00:00 2001 From: Tarun Sahu Date: Fri, 21 Nov 2025 19:14:22 +0000 Subject: [PATCH] md: remove legacy 1s delay in md_notify_reboot During system shutdown, the md driver registered notifier function (md_notify_reboot) currently imposes a hardcoded one-second delay. This delay was introduced approximately 23 years ago and was likely necessary for the hardware generation of that time. Proposing this patch to make sure there are no known devices that need this delay. Link: https://lore.kernel.org/linux-raid/20251121191422.2758555-1-tarunsahu@google.com Signed-off-by: Tarun Sahu Reviewed-by: Yu Kuai Signed-off-by: Yu Kuai --- drivers/md/md.c | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index 345b1e623abaf..e5922a6829532 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -10408,7 +10408,6 @@ static int md_notify_reboot(struct notifier_block *this, unsigned long code, void *x) { struct mddev *mddev; - int need_delay = 0; spin_lock(&all_mddevs_lock); list_for_each_entry(mddev, &all_mddevs, all_mddevs) { @@ -10422,21 +10421,11 @@ static int md_notify_reboot(struct notifier_block *this, mddev->safemode = 2; mddev_unlock(mddev); } - need_delay = 1; spin_lock(&all_mddevs_lock); mddev_put_locked(mddev); } spin_unlock(&all_mddevs_lock); - /* - * certain more exotic SCSI devices are known to be - * volatile wrt too early system reboots. While the - * right place to handle this issue is the given - * driver, we do want to have a safe RAID driver ... - */ - if (need_delay) - msleep(1000); - return NOTIFY_DONE; } -- 2.47.3