From 0b22ff5360f5c4e11050b89206370fdf7dc0a226 Mon Sep 17 00:00:00 2001
From: Mike Snitzer <snitzer@kernel.org>
Date: Tue, 14 Feb 2023 13:06:05 -0500
Subject: [PATCH] dm: remove flush_scheduled_work() during local_exit()
Git-commit: 0b22ff5360f5c4e11050b89206370fdf7dc0a226
Patch-mainline: v6.3-rc1
References: git-fixes

Commit acfe0ad74d2e1 ("dm: allocate a special workqueue for deferred
device removal") switched from using system workqueue to a single
workqueue local to DM.  But it didn't eliminate the call to
flush_scheduled_work() that was introduced purely for the benefit of
deferred device removal with commit 2c140a246dc ("dm: allow remove to
be deferred").

Since DM core uses its own workqueue (and queue_work) there is no need
to call flush_scheduled_work() from local_exit().  local_exit()'s
destroy_workqueue(deferred_remove_workqueue) handles flushing work
started with queue_work().

(Coly Li: refreshed for Linux 4.12 based SUSE kernel)

Fixes: acfe0ad74d2e1 ("dm: allocate a special workqueue for deferred device removal")
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Coly Li <colyli@suse.de>

---
 drivers/md/dm.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -279,7 +279,6 @@ out_free_rq_tio_cache:
 
 static void local_exit(void)
 {
-	flush_scheduled_work();
 	destroy_workqueue(deferred_remove_workqueue);
 
 	kmem_cache_destroy(_rq_cache);