So that scsi_wq_xxx and scsi_tmf_xxx can be bind to different cpu to get better
isolation.

This patch unfolded create_singlethread_workqueue(), added WQ_SYSFS and dropped
__WQ_ORDERED_EXPLICIT since __WQ_ORDERED_EXPLICIT workqueue isn't allowed to
change "cpumask".

Signed-off-by: Bob Liu <[email protected]>
---
 drivers/scsi/hosts.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index 7ec91c3..37d1c55 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -272,8 +272,10 @@ int scsi_add_host_with_dma(struct Scsi_Host *shost, struct 
device *dev,
        if (shost->transportt->create_work_queue) {
                snprintf(shost->work_q_name, sizeof(shost->work_q_name),
                         "scsi_wq_%d", shost->host_no);
-               shost->work_q = create_singlethread_workqueue(
-                                       shost->work_q_name);
+               shost->work_q = alloc_workqueue("%s",
+                       WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
+                       1, shost->work_q_name);
+
                if (!shost->work_q) {
                        error = -EINVAL;
                        goto out_free_shost_data;
@@ -487,7 +489,7 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template 
*sht, int privsize)
        }
 
        shost->tmf_work_q = alloc_workqueue("scsi_tmf_%d",
-                                           WQ_UNBOUND | WQ_MEM_RECLAIM,
+                                       WQ_UNBOUND | WQ_MEM_RECLAIM | WQ_SYSFS,
                                           1, shost->host_no);
        if (!shost->tmf_work_q) {
                shost_printk(KERN_WARNING, shost,
-- 
2.9.5

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