[PATCH 24/32] dlm: dlm workqueues aren't used in memory reclaim path

[Tejun Heo]

dlm isn't depended upon during memory reclaim and so are its two
workqueues.  Convert to alloc[_ordered]_workqueue() without
WQ_MEM_RECLAIM.  While at it, fix workqueue allocation failure
handling.  They return %NULL on failure not ERR_PTR() value.

Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Cc: Christine Caulfield <ccaulfie@xxxxxxxxxx>
Cc: David Teigland <teigland@xxxxxxxxxx>
Cc: cluster-devel@xxxxxxxxxx
---
Only compile tested.  Please feel free to take it into the subsystem
tree or simply ack - I'll route it through the wq tree.

Thanks.

 fs/dlm/lowcomms.c |   19 ++++++++-----------
 1 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 37a34c2..9aad7c0 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1430,20 +1430,17 @@ static void work_stop(void)
 
 static int work_start(void)
 {
-	int error;
-	recv_workqueue = create_workqueue("dlm_recv");
-	error = IS_ERR(recv_workqueue);
-	if (error) {
-		log_print("can't start dlm_recv %d", error);
-		return error;
+	recv_workqueue = alloc_workqueue("dlm_recv", 0, 1);
+	if (!recv_workqueue) {
+		log_print("can't start dlm_recv");
+		return -ENOMEM;
 	}
 
-	send_workqueue = create_singlethread_workqueue("dlm_send");
-	error = IS_ERR(send_workqueue);
-	if (error) {
-		log_print("can't start dlm_send %d", error);
+	send_workqueue = alloc_ordered_workqueue("dlm_send", 0);
+	if (!send_workqueue) {
+		log_print("can't start dlm_send");
 		destroy_workqueue(recv_workqueue);
-		return error;
+		return -ENOMEM;
 	}
 
 	return 0;
-- 
1.7.1

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