unify flush_work/flush_work_keventd and rename it to cancel_work_sync
flush_work(wq, work) doesn't need the first parameter, we can use cwq->wq
(this was possible from the very beginnig, I missed this). So we can unify
flush_work_keventd and flush_work.
Also, rename flush_work() to cancel_work_sync() and fix all callers.
Perhaps this is not the best name, but "flush_work" is really bad.
(akpm: this is why the earlier patches bypassed maintainers)
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Tejun Heo <htejun@gmail.com>
Cc: Auke Kok <auke-jan.h.kok@intel.com>,
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index c059767..df50657 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -3633,7 +3633,7 @@
void kblockd_flush_work(struct work_struct *work)
{
- flush_work(kblockd_workqueue, work);
+ cancel_work_sync(work);
}
EXPORT_SYMBOL(kblockd_flush_work);
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b74e56c..fef87dd 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1316,7 +1316,7 @@
spin_unlock_irqrestore(ap->lock, flags);
DPRINTK("flush #1\n");
- flush_work(ata_wq, &ap->port_task.work); /* akpm: seems unneeded */
+ cancel_work_sync(&ap->port_task.work); /* akpm: seems unneeded */
/*
* At this point, if a task is running, it's guaranteed to see
@@ -1327,7 +1327,7 @@
if (ata_msg_ctl(ap))
ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n",
__FUNCTION__);
- flush_work(ata_wq, &ap->port_task.work);
+ cancel_work_sync(&ap->port_task.work);
}
spin_lock_irqsave(ap->lock, flags);
@@ -6475,9 +6475,9 @@
/* Flush hotplug task. The sequence is similar to
* ata_port_flush_task().
*/
- flush_work(ata_aux_wq, &ap->hotplug_task.work); /* akpm: why? */
+ cancel_work_sync(&ap->hotplug_task.work); /* akpm: why? */
cancel_delayed_work(&ap->hotplug_task);
- flush_work(ata_aux_wq, &ap->hotplug_task.work);
+ cancel_work_sync(&ap->hotplug_task.work);
skip_eh:
/* remove the associated SCSI host */
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 397e25b..637ae8f 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -1214,7 +1214,7 @@
int i;
#endif
- flush_work_keventd(&adapter->reset_task);
+ cancel_work_sync(&adapter->reset_task);
e1000_release_manageability(adapter);
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index f445c46..f71dab3 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -663,9 +663,9 @@
/*
* Finish any pending work; we might have been scheduled to be called
- * from keventd ourselves, but flush_work_keventd() handles that.
+ * from keventd ourselves, but cancel_work_sync() handles that.
*/
- flush_work_keventd(&phydev->phy_queue);
+ cancel_work_sync(&phydev->phy_queue);
free_irq(phydev->irq, phydev);
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 0c0f9c8..923b9c7 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -7386,7 +7386,7 @@
{
struct tg3 *tp = netdev_priv(dev);
- flush_work_keventd(&tp->reset_task);
+ cancel_work_sync(&tp->reset_task);
netif_stop_queue(dev);
diff --git a/fs/aio.c b/fs/aio.c
index d18690b..ac1c158 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -348,7 +348,7 @@
/*
* Ensure we don't leave the ctx on the aio_wq
*/
- flush_work(aio_wq, &ctx->wq.work);
+ cancel_work_sync(&ctx->wq.work);
if (1 != atomic_read(&ctx->users))
printk(KERN_DEBUG
@@ -371,7 +371,7 @@
BUG_ON(ctx->reqs_active);
cancel_delayed_work(&ctx->wq);
- flush_work(aio_wq, &ctx->wq.work);
+ cancel_work_sync(&ctx->wq.work);
aio_free_ring(ctx);
mmdrop(ctx->mm);
ctx->mm = NULL;
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index e1581dc..d555f31 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -128,30 +128,33 @@
extern void destroy_workqueue(struct workqueue_struct *wq);
extern int FASTCALL(queue_work(struct workqueue_struct *wq, struct work_struct *work));
-extern int FASTCALL(queue_delayed_work(struct workqueue_struct *wq, struct delayed_work *work, unsigned long delay));
+extern int FASTCALL(queue_delayed_work(struct workqueue_struct *wq,
+ struct delayed_work *work, unsigned long delay));
extern int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
- struct delayed_work *work, unsigned long delay);
+ struct delayed_work *work, unsigned long delay);
+
extern void FASTCALL(flush_workqueue(struct workqueue_struct *wq));
-extern void flush_work(struct workqueue_struct *wq, struct work_struct *work);
-extern void flush_work_keventd(struct work_struct *work);
+extern void flush_scheduled_work(void);
extern int FASTCALL(schedule_work(struct work_struct *work));
-extern int FASTCALL(schedule_delayed_work(struct delayed_work *work, unsigned long delay));
-
-extern int schedule_delayed_work_on(int cpu, struct delayed_work *work, unsigned long delay);
+extern int FASTCALL(schedule_delayed_work(struct delayed_work *work,
+ unsigned long delay));
+extern int schedule_delayed_work_on(int cpu, struct delayed_work *work,
+ unsigned long delay);
extern int schedule_on_each_cpu(work_func_t func);
-extern void flush_scheduled_work(void);
extern int current_is_keventd(void);
extern int keventd_up(void);
extern void init_workqueues(void);
int execute_in_process_context(work_func_t fn, struct execute_work *);
+extern void cancel_work_sync(struct work_struct *work);
+
/*
* Kill off a pending schedule_delayed_work(). Note that the work callback
* function may still be running on return from cancel_delayed_work(), unless
* it returns 1 and the work doesn't re-arm itself. Run flush_workqueue() or
- * flush_work() or cancel_work_sync() to wait on it.
+ * cancel_work_sync() to wait on it.
*/
static inline int cancel_delayed_work(struct delayed_work *work)
{
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 63885ab..c9ab429 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -413,23 +413,23 @@
}
/**
- * flush_work - block until a work_struct's callback has terminated
- * @wq: the workqueue on which the work is queued
+ * cancel_work_sync - block until a work_struct's callback has terminated
* @work: the work which is to be flushed
*
- * flush_work() will attempt to cancel the work if it is queued. If the work's
- * callback appears to be running, flush_work() will block until it has
- * completed.
+ * cancel_work_sync() will attempt to cancel the work if it is queued. If the
+ * work's callback appears to be running, cancel_work_sync() will block until
+ * it has completed.
*
- * flush_work() is designed to be used when the caller is tearing down data
- * structures which the callback function operates upon. It is expected that,
- * prior to calling flush_work(), the caller has arranged for the work to not
- * be requeued.
+ * cancel_work_sync() is designed to be used when the caller is tearing down
+ * data structures which the callback function operates upon. It is expected
+ * that, prior to calling cancel_work_sync(), the caller has arranged for the
+ * work to not be requeued.
*/
-void flush_work(struct workqueue_struct *wq, struct work_struct *work)
+void cancel_work_sync(struct work_struct *work)
{
- const cpumask_t *cpu_map = wq_cpu_map(wq);
struct cpu_workqueue_struct *cwq;
+ struct workqueue_struct *wq;
+ const cpumask_t *cpu_map;
int cpu;
might_sleep();
@@ -448,10 +448,13 @@
work_clear_pending(work);
spin_unlock_irq(&cwq->lock);
+ wq = cwq->wq;
+ cpu_map = wq_cpu_map(wq);
+
for_each_cpu_mask(cpu, *cpu_map)
wait_on_work(per_cpu_ptr(wq->cpu_wq, cpu), work);
}
-EXPORT_SYMBOL_GPL(flush_work);
+EXPORT_SYMBOL_GPL(cancel_work_sync);
static struct workqueue_struct *keventd_wq;
@@ -540,18 +543,13 @@
}
EXPORT_SYMBOL(flush_scheduled_work);
-void flush_work_keventd(struct work_struct *work)
-{
- flush_work(keventd_wq, work);
-}
-EXPORT_SYMBOL(flush_work_keventd);
-
/**
* cancel_rearming_delayed_work - kill off a delayed work whose handler rearms the delayed work.
* @dwork: the delayed work struct
*
* Note that the work callback function may still be running on return from
- * cancel_delayed_work(). Run flush_workqueue() or flush_work() to wait on it.
+ * cancel_delayed_work(). Run flush_workqueue() or cancel_work_sync() to wait
+ * on it.
*/
void cancel_rearming_delayed_work(struct delayed_work *dwork)
{
diff --git a/net/ipv4/ipvs/ip_vs_ctl.c b/net/ipv4/ipvs/ip_vs_ctl.c
index 342e836..68fe1d4 100644
--- a/net/ipv4/ipvs/ip_vs_ctl.c
+++ b/net/ipv4/ipvs/ip_vs_ctl.c
@@ -2387,7 +2387,7 @@
EnterFunction(2);
ip_vs_trash_cleanup();
cancel_rearming_delayed_work(&defense_work);
- flush_work_keventd(&defense_work.work);
+ cancel_work_sync(&defense_work.work);
ip_vs_kill_estimator(&ip_vs_stats);
unregister_sysctl_table(sysctl_header);
proc_net_remove("ip_vs_stats");