linux-kernel - [PATCH v2] net: fjes: fjes_main: Remove create

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Message-ID: <20160604141004.GA30209@Karyakshetra>
Date:	Sat, 4 Jun 2016 19:40:04 +0530
From:	Bhaktipriya Shridhar <bhaktipriya96@...il.com>
To:	"David S. Miller" <davem@...emloft.net>,
	Taku Izumi <izumi.taku@...fujitsu.com>,
	Florian Westphal <fw@...len.de>,
	Bhaktipriya Shridhar <bhaktipriya96@...il.com>
Cc:	Tejun Heo <tj@...nel.org>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] net: fjes: fjes_main: Remove create_workqueue

alloc_workqueue replaces deprecated create_workqueue().

The workqueue adapter->txrx_wq has workitem
&adapter->raise_intr_rxdata_task per adapter. Extended Socket Network
Device is shared memory based, so someone's transmission denotes other's
reception.  raise_intr_rxdata_task raises interruption of receivers from
the sender in order to notify receivers. Forward progress under memory
pressure is a requirement here.

The workqueue adapter->control_wq has workitem
&adapter->interrupt_watch_task per adapter. interrupt_watch_task is used
to prevent delay of interrupts. Forward progress under memory pressure
is a requirement here.

Dedicated workqueues have been used in both cases since the workitems
on the workqueues are involved in normal device operation with
WQ_MEM_RECLAIM set to gurantee forward progress under memory pressure.
Since there are only a fixed number of work items, explicit concurrency
limit is unnecessary.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@...il.com>
---
 Changes in v2:
	- Changed commit description to more concise one.

 drivers/net/fjes/fjes_main.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
index 86c331b..9006877 100644
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -1187,8 +1187,9 @@ static int fjes_probe(struct platform_device *plat_dev)
 	adapter->force_reset = false;
 	adapter->open_guard = false;

-	adapter->txrx_wq = create_workqueue(DRV_NAME "/txrx");
-	adapter->control_wq = create_workqueue(DRV_NAME "/control");
+	adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
+	adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
+					      WQ_MEM_RECLAIM, 0);

 	INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
 	INIT_WORK(&adapter->raise_intr_rxdata_task,
--
2.1.4