Merge branch 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

* 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: fix build failure introduced by s/freezeable/freezable/
  workqueue: add system_freezeable_wq
  rds/ib: use system_wq instead of rds_ib_fmr_wq
  net/9p: replace p9_poll_task with a work
  net/9p: use system_wq instead of p9_mux_wq
  xfs: convert to alloc_workqueue()
  reiserfs: make commit_wq use the default concurrency level
  ocfs2: use system_wq instead of ocfs2_quota_wq
  ext4: convert to alloc_workqueue()
  scsi/scsi_tgt_lib: scsi_tgtd isn't used in memory reclaim path
  scsi/be2iscsi,qla2xxx: convert to alloc_workqueue()
  misc/iwmc3200top: use system_wq instead of dedicated workqueues
  i2o: use alloc_workqueue() instead of create_workqueue()
  acpi: kacpi*_wq don't need WQ_MEM_RECLAIM
  fs/aio: aio_wq isn't used in memory reclaim path
  input/tps6507x-ts: use system_wq instead of dedicated workqueue
  cpufreq: use system_wq instead of dedicated workqueues
  wireless/ipw2x00: use system_wq instead of dedicated workqueues
  arm/omap: use system_wq in mailbox
  workqueue: use WQ_MEM_RECLAIM instead of WQ_RESCUER

5 files changed, 18 insertions, 74 deletions

diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index 078eb162d9b..a30471e5174 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -153,10 +153,11 @@ struct p9_conn {
 	unsigned long wsched;
 };
 
+static void p9_poll_workfn(struct work_struct *work);
+
 static DEFINE_SPINLOCK(p9_poll_lock);
 static LIST_HEAD(p9_poll_pending_list);
-static struct workqueue_struct *p9_mux_wq;
-static struct task_struct *p9_poll_task;
+static DECLARE_WORK(p9_poll_work, p9_poll_workfn);
 
 static void p9_mux_poll_stop(struct p9_conn *m)
 {
@@ -384,7 +385,7 @@ static void p9_read_work(struct work_struct *work)
 
 		if (n & POLLIN) {
 			P9_DPRINTK(P9_DEBUG_TRANS, "sched read work %p\n", m);
-			queue_work(p9_mux_wq, &m->rq);
+			schedule_work(&m->rq);
 		} else
 			clear_bit(Rworksched, &m->wsched);
 	} else
@@ -497,7 +498,7 @@ static void p9_write_work(struct work_struct *work)
 
 		if (n & POLLOUT) {
 			P9_DPRINTK(P9_DEBUG_TRANS, "sched write work %p\n", m);
-			queue_work(p9_mux_wq, &m->wq);
+			schedule_work(&m->wq);
 		} else
 			clear_bit(Wworksched, &m->wsched);
 	} else
@@ -516,15 +517,14 @@ static int p9_pollwake(wait_queue_t *wait, unsigned mode, int sync, void *key)
 		container_of(wait, struct p9_poll_wait, wait);
 	struct p9_conn *m = pwait->conn;
 	unsigned long flags;
-	DECLARE_WAITQUEUE(dummy_wait, p9_poll_task);
 
 	spin_lock_irqsave(&p9_poll_lock, flags);
 	if (list_empty(&m->poll_pending_link))
 		list_add_tail(&m->poll_pending_link, &p9_poll_pending_list);
 	spin_unlock_irqrestore(&p9_poll_lock, flags);
 
-	/* perform the default wake up operation */
-	return default_wake_function(&dummy_wait, mode, sync, key);
+	schedule_work(&p9_poll_work);
+	return 1;
 }
 
 /**
@@ -629,7 +629,7 @@ static void p9_poll_mux(struct p9_conn *m)
 		P9_DPRINTK(P9_DEBUG_TRANS, "mux %p can read\n", m);
 		if (!test_and_set_bit(Rworksched, &m->wsched)) {
 			P9_DPRINTK(P9_DEBUG_TRANS, "sched read work %p\n", m);
-			queue_work(p9_mux_wq, &m->rq);
+			schedule_work(&m->rq);
 		}
 	}
 
@@ -639,7 +639,7 @@ static void p9_poll_mux(struct p9_conn *m)
 		if ((m->wsize || !list_empty(&m->unsent_req_list)) &&
 		    !test_and_set_bit(Wworksched, &m->wsched)) {
 			P9_DPRINTK(P9_DEBUG_TRANS, "sched write work %p\n", m);
-			queue_work(p9_mux_wq, &m->wq);
+			schedule_work(&m->wq);
 		}
 	}
 }
@@ -677,7 +677,7 @@ static int p9_fd_request(struct p9_client *client, struct p9_req_t *req)
 		n = p9_fd_poll(m->client, NULL);
 
 	if (n & POLLOUT && !test_and_set_bit(Wworksched, &m->wsched))
-		queue_work(p9_mux_wq, &m->wq);
+		schedule_work(&m->wq);
 
 	return 0;
 }
@@ -1047,12 +1047,12 @@ static struct p9_trans_module p9_fd_trans = {
  *
  */
 
-static int p9_poll_proc(void *a)
+static void p9_poll_workfn(struct work_struct *work)
 {
 	unsigned long flags;
 
 	P9_DPRINTK(P9_DEBUG_TRANS, "start %p\n", current);
- repeat:
+
 	spin_lock_irqsave(&p9_poll_lock, flags);
 	while (!list_empty(&p9_poll_pending_list)) {
 		struct p9_conn *conn = list_first_entry(&p9_poll_pending_list,
@@ -1067,35 +1067,11 @@ static int p9_poll_proc(void *a)
 	}
 	spin_unlock_irqrestore(&p9_poll_lock, flags);
 
-	set_current_state(TASK_INTERRUPTIBLE);
-	if (list_empty(&p9_poll_pending_list)) {
-		P9_DPRINTK(P9_DEBUG_TRANS, "sleeping...\n");
-		schedule();
-	}
-	__set_current_state(TASK_RUNNING);
-
-	if (!kthread_should_stop())
-		goto repeat;
-
 	P9_DPRINTK(P9_DEBUG_TRANS, "finish\n");
-	return 0;
 }
 
 int p9_trans_fd_init(void)
 {
-	p9_mux_wq = create_workqueue("v9fs");
-	if (!p9_mux_wq) {
-		printk(KERN_WARNING "v9fs: mux: creating workqueue failed\n");
-		return -ENOMEM;
-	}
-
-	p9_poll_task = kthread_run(p9_poll_proc, NULL, "v9fs-poll");
-	if (IS_ERR(p9_poll_task)) {
-		destroy_workqueue(p9_mux_wq);
-		printk(KERN_WARNING "v9fs: mux: creating poll task failed\n");
-		return PTR_ERR(p9_poll_task);
-	}
-
 	v9fs_register_trans(&p9_tcp_trans);
 	v9fs_register_trans(&p9_unix_trans);
 	v9fs_register_trans(&p9_fd_trans);
@@ -1105,10 +1081,8 @@ int p9_trans_fd_init(void)
 
 void p9_trans_fd_exit(void)
 {
-	kthread_stop(p9_poll_task);
+	flush_work_sync(&p9_poll_work);
 	v9fs_unregister_trans(&p9_tcp_trans);
 	v9fs_unregister_trans(&p9_unix_trans);
 	v9fs_unregister_trans(&p9_fd_trans);
-
-	destroy_workqueue(p9_mux_wq);
 }
diff --git a/net/rds/ib.c b/net/rds/ib.c
index 4123967d4d6..cce19f95c62 100644
--- a/net/rds/ib.c
+++ b/net/rds/ib.c
@@ -364,7 +364,6 @@ void rds_ib_exit(void)
 	rds_ib_sysctl_exit();
 	rds_ib_recv_exit();
 	rds_trans_unregister(&rds_ib_transport);
-	rds_ib_fmr_exit();
 }
 
 struct rds_transport rds_ib_transport = {
@@ -400,13 +399,9 @@ int rds_ib_init(void)
 
 	INIT_LIST_HEAD(&rds_ib_devices);
 
-	ret = rds_ib_fmr_init();
-	if (ret)
-		goto out;
-
 	ret = ib_register_client(&rds_ib_client);
 	if (ret)
-		goto out_fmr_exit;
+		goto out;
 
 	ret = rds_ib_sysctl_init();
 	if (ret)
@@ -430,8 +425,6 @@ out_sysctl:
 	rds_ib_sysctl_exit();
 out_ibreg:
 	rds_ib_unregister_client();
-out_fmr_exit:
-	rds_ib_fmr_exit();
 out:
 	return ret;
 }
diff --git a/net/rds/ib.h b/net/rds/ib.h
index e34ad032b66..4297d92788d 100644
--- a/net/rds/ib.h
+++ b/net/rds/ib.h
@@ -307,8 +307,6 @@ void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents,
 void rds_ib_sync_mr(void *trans_private, int dir);
 void rds_ib_free_mr(void *trans_private, int invalidate);
 void rds_ib_flush_mrs(void);
-int rds_ib_fmr_init(void);
-void rds_ib_fmr_exit(void);
 
 /* ib_recv.c */
 int rds_ib_recv_init(void);
diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c
index 18a833c450c..819c35a0d9c 100644
--- a/net/rds/ib_rdma.c
+++ b/net/rds/ib_rdma.c
@@ -38,8 +38,6 @@
 #include "ib.h"
 #include "xlist.h"
 
-static struct workqueue_struct *rds_ib_fmr_wq;
-
 static DEFINE_PER_CPU(unsigned long, clean_list_grace);
 #define CLEAN_LIST_BUSY_BIT 0
 
@@ -307,7 +305,7 @@ static struct rds_ib_mr *rds_ib_alloc_fmr(struct rds_ib_device *rds_ibdev)
 	int err = 0, iter = 0;
 
 	if (atomic_read(&pool->dirty_count) >= pool->max_items / 10)
-		queue_delayed_work(rds_ib_fmr_wq, &pool->flush_worker, 10);
+		schedule_delayed_work(&pool->flush_worker, 10);
 
 	while (1) {
 		ibmr = rds_ib_reuse_fmr(pool);
@@ -696,24 +694,6 @@ out_nolock:
 	return ret;
 }
 
-int rds_ib_fmr_init(void)
-{
-	rds_ib_fmr_wq = create_workqueue("rds_fmr_flushd");
-	if (!rds_ib_fmr_wq)
-		return -ENOMEM;
-	return 0;
-}
-
-/*
- * By the time this is called all the IB devices should have been torn down and
- * had their pools freed.  As each pool is freed its work struct is waited on,
- * so the pool flushing work queue should be idle by the time we get here.
- */
-void rds_ib_fmr_exit(void)
-{
-	destroy_workqueue(rds_ib_fmr_wq);
-}
-
 static void rds_ib_mr_pool_flush_worker(struct work_struct *work)
 {
 	struct rds_ib_mr_pool *pool = container_of(work, struct rds_ib_mr_pool, flush_worker.work);
@@ -741,7 +721,7 @@ void rds_ib_free_mr(void *trans_private, int invalidate)
 	/* If we've pinned too many pages, request a flush */
 	if (atomic_read(&pool->free_pinned) >= pool->max_free_pinned ||
 	    atomic_read(&pool->dirty_count) >= pool->max_items / 10)
-		queue_delayed_work(rds_ib_fmr_wq, &pool->flush_worker, 10);
+		schedule_delayed_work(&pool->flush_worker, 10);
 
 	if (invalidate) {
 		if (likely(!in_interrupt())) {
@@ -749,8 +729,7 @@ void rds_ib_free_mr(void *trans_private, int invalidate)
 		} else {
 			/* We get here if the user created a MR marked
 			 * as use_once and invalidate at the same time. */
-			queue_delayed_work(rds_ib_fmr_wq,
-					   &pool->flush_worker, 10);
+			schedule_delayed_work(&pool->flush_worker, 10);
 		}
 	}
 
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 59e599498e3..3fc8624fcd1 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -955,7 +955,7 @@ static int rpciod_start(void)
 	 * Create the rpciod thread and wait for it to start.
 	 */
 	dprintk("RPC:       creating workqueue rpciod\n");
-	wq = alloc_workqueue("rpciod", WQ_RESCUER, 0);
+	wq = alloc_workqueue("rpciod", WQ_MEM_RECLAIM, 0);
 	rpciod_workqueue = wq;
 	return rpciod_workqueue != NULL;
 }