> -----Original Message----- > From: Amitoj Kaur Chawla [mailto:amitoj1606@xxxxxxxxx] > Sent: Sunday, February 28, 2016 7:57 AM > To: Romer, Benjamin M <Benjamin.Romer@xxxxxxxxxx>; > Jes.Sorensen@xxxxxxxxxx; Arfvidson, Erik <Erik.Arfvidson@xxxxxxxxxx>; > Kershner, David A <David.Kershner@xxxxxxxxxx>; jkc@xxxxxxxxxx; Sell, > Timothy C <Timothy.Sell@xxxxxxxxxx>; Thompson, Bryan E. > <bryan.thompson@xxxxxxxxxx>; dzickus@xxxxxxxxxx; > gregkh@xxxxxxxxxxxxxxxxxxx; *S-Par-Maintainer > <SParMaintainer@xxxxxxxxxx>; devel@xxxxxxxxxxxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx > Cc: tj@xxxxxxxxxx; outreachy-kernel@xxxxxxxxxxxxxxxx > Subject: [RFC] staging: unisys: visornic: Remove > create_singlethread_workqueue() > > With concurrency managed workqueues, use of dedicated workqueues > can be replaced by using system_wq. > Drop visornic_timeout_reset_workqueue by using system_wq. > > Since there is only one work item per devdata and different > devdatas do not need to be ordered, increase of concurrency > level by switching to system_wq should not break anything. > > cancel_work_sync() is used to ensure that work is not pending or > executing on any CPU. > > Signed-off-by: Amitoj Kaur Chawla <amitoj1606@xxxxxxxxx> > Acked-by: Tejun Heo <tj@xxxxxxxxxx> Tested on s-Par system, no issues found. Tested-by: David Kershner <david.kershner@xxxxxxxxxx> > --- > Only compile tested. > > drivers/staging/unisys/visornic/visornic_main.c | 21 ++------------------- > 1 file changed, 2 insertions(+), 19 deletions(-) > > diff --git a/drivers/staging/unisys/visornic/visornic_main.c > b/drivers/staging/unisys/visornic/visornic_main.c > index df4f688..6749c4e 100644 > --- a/drivers/staging/unisys/visornic/visornic_main.c > +++ b/drivers/staging/unisys/visornic/visornic_main.c > @@ -59,8 +59,6 @@ static const struct file_operations > debugfs_enable_ints_fops = { > .write = enable_ints_write, > }; > > -static struct workqueue_struct *visornic_timeout_reset_workqueue; > - > /* GUIDS for director channel type supported by this driver. */ > static struct visor_channeltype_descriptor visornic_channel_types[] = { > /* Note that the only channel type we expect to be reported by the > @@ -1070,7 +1068,7 @@ visornic_xmit_timeout(struct net_device *netdev) > spin_unlock_irqrestore(&devdata->priv_lock, flags); > return; > } > - queue_work(visornic_timeout_reset_workqueue, &devdata- > >timeout_reset); > + schedule_work(&devdata->timeout_reset); > spin_unlock_irqrestore(&devdata->priv_lock, flags); > } > > @@ -1998,7 +1996,7 @@ static void visornic_remove(struct visor_device > *dev) > } > > /* going_away prevents new items being added to the workqueues > */ > - flush_workqueue(visornic_timeout_reset_workqueue); > + cancel_work_sync(&devdata->timeout_reset); > > debugfs_remove_recursive(devdata->eth_debugfs_dir); > > @@ -2117,21 +2115,10 @@ static int visornic_init(void) > if (!ret) > goto cleanup_debugfs; > > - /* create workqueue for tx timeout reset */ > - visornic_timeout_reset_workqueue = > - create_singlethread_workqueue("visornic_timeout_reset"); > - if (!visornic_timeout_reset_workqueue) > - goto cleanup_workqueue; > - > err = visorbus_register_visor_driver(&visornic_driver); > if (!err) > return 0; > > -cleanup_workqueue: > - if (visornic_timeout_reset_workqueue) { > - flush_workqueue(visornic_timeout_reset_workqueue); > - destroy_workqueue(visornic_timeout_reset_workqueue); > - } > cleanup_debugfs: > debugfs_remove_recursive(visornic_debugfs_dir); > > @@ -2147,10 +2134,6 @@ static void visornic_cleanup(void) > { > visorbus_unregister_visor_driver(&visornic_driver); > > - if (visornic_timeout_reset_workqueue) { > - flush_workqueue(visornic_timeout_reset_workqueue); > - destroy_workqueue(visornic_timeout_reset_workqueue); > - } > debugfs_remove_recursive(visornic_debugfs_dir); > } > > -- > 1.9.1 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
