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Groups > linux.kernel > #1451151

[RFC] usb: host: u132-hcd: Remove deprecated create_singlethread_workqueue

From Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Newsgroups linux.kernel
Subject [RFC] usb: host: u132-hcd: Remove deprecated create_singlethread_workqueue
Date 2016-07-27 11:30 +0200
Message-ID <rZtk6-5Wg-27@gated-at.bofh.it> (permalink)
Organization linux.* mail to news gateway

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alloc_ordered_workqueue replaces the deprecated
create_singlethread_workqueue.

The workqueue "workqueue" has multiple workitems which may require
ordering. Hence, a dedicated ordered workqueue has been used.
Since the workqueue is not being used on a memory reclaim path,
WQ_MEM_RECLAIM has not been set.

Can the workitems run concurrently? Is the ordering among work items
necessary?

Thanks.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
---
 drivers/usb/host/u132-hcd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/u132-hcd.c b/drivers/usb/host/u132-hcd.c
index 43d5293..cbde189 100644
--- a/drivers/usb/host/u132-hcd.c
+++ b/drivers/usb/host/u132-hcd.c
@@ -3206,7 +3206,7 @@ static int __init u132_hcd_init(void)
 	if (usb_disabled())
 		return -ENODEV;
 	printk(KERN_INFO "driver %s\n", hcd_name);
-	workqueue = create_singlethread_workqueue("u132");
+	workqueue = alloc_ordered_workqueue("u132", 0);
 	retval = platform_driver_register(&u132_platform_driver);
 	return retval;
 }
--
2.1.4

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[RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Bhaktipriya Shridhar <bhaktipriya96@gmail.com> - 2016-07-27 11:30 +0200
  Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Oliver Neukum <oneukum@suse.com> - 2016-07-27 11:40 +0200
    Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Tejun Heo <tj@kernel.org> - 2016-07-27 20:10 +0200
      Re: [RFC] usb: host: u132-hcd: Remove deprecated create_singlethread_workqueue Alan Stern <stern@rowland.harvard.edu> - 2016-07-27 21:00 +0200
        Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Tejun Heo <tj@kernel.org> - 2016-07-27 21:30 +0200
          Re: [RFC] usb: host: u132-hcd: Remove deprecated create_singlethread_workqueue Alan Stern <stern@rowland.harvard.edu> - 2016-07-27 22:50 +0200
            Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Tejun Heo <tj@kernel.org> - 2016-07-29 15:20 +0200
              Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Michal Hocko <mhocko@kernel.org> - 2016-08-01 16:00 +0200
                Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Tejun Heo <tj@kernel.org> - 2016-08-01 16:30 +0200
                Re: [RFC] usb: host: u132-hcd: Remove deprecated create_singlethread_workqueue Alan Stern <stern@rowland.harvard.edu> - 2016-08-01 21:10 +0200
                Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Michal Hocko <mhocko@kernel.org> - 2016-08-01 21:40 +0200
                Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Oliver Neukum <oneukum@suse.com> - 2016-08-02 10:20 +0200
                Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Michal Hocko <mhocko@kernel.org> - 2016-08-02 10:40 +0200
                Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Oliver Neukum <oneukum@suse.com> - 2016-08-02 12:10 +0200
                Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Michal Hocko <mhocko@kernel.org> - 2016-08-02 14:00 +0200
                Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Oliver Neukum <oneukum@suse.com> - 2016-08-02 15:40 +0200
                Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Tejun Heo <tj@kernel.org> - 2016-08-02 21:20 +0200
                Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Michal Hocko <mhocko@kernel.org> - 2016-08-02 23:40 +0200
                Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Michal Hocko <mhocko@kernel.org> - 2016-08-02 16:00 +0200
                Re: [RFC] usb: host: u132-hcd: Remove deprecated  create_singlethread_workqueue Oliver Neukum <oneukum@suse.com> - 2016-08-02 19:20 +0200

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