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authorTejun Heo <tj@kernel.org>2012-08-22 00:18:24 +0400
committerTejun Heo <tj@kernel.org>2012-08-22 00:18:24 +0400
commite7c2f967445dd2041f0f8e3179cca22bb8bb7f79 (patch)
treecb6c1d3593d2497e740d313f55592f41e8ae2039
parente0aecdd874d78b7129a64b056c20e529e2c916df (diff)
downloadlinux-e7c2f967445dd2041f0f8e3179cca22bb8bb7f79.tar.xz
workqueue: use mod_delayed_work() instead of __cancel + queue
Now that mod_delayed_work() is safe to call from IRQ handlers, __cancel_delayed_work() followed by queue_delayed_work() can be replaced with mod_delayed_work(). Most conversions are straight-forward except for the following. * net/core/link_watch.c: linkwatch_schedule_work() was doing a quite elaborate dancing around its delayed_work. Collapse it such that linkwatch_work is queued for immediate execution if LW_URGENT and existing timer is kept otherwise. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
-rw-r--r--block/blk-core.c6
-rw-r--r--block/blk-throttle.c7
-rw-r--r--drivers/block/floppy.c3
-rw-r--r--drivers/infiniband/core/mad.c14
-rw-r--r--drivers/input/keyboard/qt2160.c3
-rw-r--r--drivers/input/mouse/synaptics_i2c.c7
-rw-r--r--net/core/link_watch.c21
7 files changed, 17 insertions, 44 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 4b4dbdfbca89..4b8b606dbb01 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -319,10 +319,8 @@ EXPORT_SYMBOL(__blk_run_queue);
*/
void blk_run_queue_async(struct request_queue *q)
{
- if (likely(!blk_queue_stopped(q))) {
- __cancel_delayed_work(&q->delay_work);
- queue_delayed_work(kblockd_workqueue, &q->delay_work, 0);
- }
+ if (likely(!blk_queue_stopped(q)))
+ mod_delayed_work(kblockd_workqueue, &q->delay_work, 0);
}
EXPORT_SYMBOL(blk_run_queue_async);
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 5a58e779912b..a9664fa0b609 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -929,12 +929,7 @@ throtl_schedule_delayed_work(struct throtl_data *td, unsigned long delay)
/* schedule work if limits changed even if no bio is queued */
if (total_nr_queued(td) || td->limits_changed) {
- /*
- * We might have a work scheduled to be executed in future.
- * Cancel that and schedule a new one.
- */
- __cancel_delayed_work(dwork);
- queue_delayed_work(kthrotld_workqueue, dwork, delay);
+ mod_delayed_work(kthrotld_workqueue, dwork, delay);
throtl_log(td, "schedule work. delay=%lu jiffies=%lu",
delay, jiffies);
}
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index a7d6347aaa79..55a5bc002c06 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -672,7 +672,6 @@ static void __reschedule_timeout(int drive, const char *message)
if (drive == current_reqD)
drive = current_drive;
- __cancel_delayed_work(&fd_timeout);
if (drive < 0 || drive >= N_DRIVE) {
delay = 20UL * HZ;
@@ -680,7 +679,7 @@ static void __reschedule_timeout(int drive, const char *message)
} else
delay = UDP->timeout;
- queue_delayed_work(floppy_wq, &fd_timeout, delay);
+ mod_delayed_work(floppy_wq, &fd_timeout, delay);
if (UDP->flags & FD_DEBUG)
DPRINT("reschedule timeout %s\n", message);
timeout_message = message;
diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c
index b0d0bc8a6fb6..b5938147fc89 100644
--- a/drivers/infiniband/core/mad.c
+++ b/drivers/infiniband/core/mad.c
@@ -2013,13 +2013,11 @@ static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv)
if (time_after(mad_agent_priv->timeout,
mad_send_wr->timeout)) {
mad_agent_priv->timeout = mad_send_wr->timeout;
- __cancel_delayed_work(&mad_agent_priv->timed_work);
delay = mad_send_wr->timeout - jiffies;
if ((long)delay <= 0)
delay = 1;
- queue_delayed_work(mad_agent_priv->qp_info->
- port_priv->wq,
- &mad_agent_priv->timed_work, delay);
+ mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq,
+ &mad_agent_priv->timed_work, delay);
}
}
}
@@ -2052,11 +2050,9 @@ static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr)
list_add(&mad_send_wr->agent_list, list_item);
/* Reschedule a work item if we have a shorter timeout */
- if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) {
- __cancel_delayed_work(&mad_agent_priv->timed_work);
- queue_delayed_work(mad_agent_priv->qp_info->port_priv->wq,
- &mad_agent_priv->timed_work, delay);
- }
+ if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list)
+ mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq,
+ &mad_agent_priv->timed_work, delay);
}
void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr,
diff --git a/drivers/input/keyboard/qt2160.c b/drivers/input/keyboard/qt2160.c
index e7a5e36e1203..76b7d430d03a 100644
--- a/drivers/input/keyboard/qt2160.c
+++ b/drivers/input/keyboard/qt2160.c
@@ -156,8 +156,7 @@ static irqreturn_t qt2160_irq(int irq, void *_qt2160)
spin_lock_irqsave(&qt2160->lock, flags);
- __cancel_delayed_work(&qt2160->dwork);
- schedule_delayed_work(&qt2160->dwork, 0);
+ mod_delayed_work(system_wq, &qt2160->dwork, 0);
spin_unlock_irqrestore(&qt2160->lock, flags);
diff --git a/drivers/input/mouse/synaptics_i2c.c b/drivers/input/mouse/synaptics_i2c.c
index f14675702c0f..063a174d3a88 100644
--- a/drivers/input/mouse/synaptics_i2c.c
+++ b/drivers/input/mouse/synaptics_i2c.c
@@ -376,12 +376,7 @@ static void synaptics_i2c_reschedule_work(struct synaptics_i2c *touch,
spin_lock_irqsave(&touch->lock, flags);
- /*
- * If work is already scheduled then subsequent schedules will not
- * change the scheduled time that's why we have to cancel it first.
- */
- __cancel_delayed_work(&touch->dwork);
- schedule_delayed_work(&touch->dwork, delay);
+ mod_delayed_work(system_wq, &touch->dwork, delay);
spin_unlock_irqrestore(&touch->lock, flags);
}
diff --git a/net/core/link_watch.c b/net/core/link_watch.c
index c3519c6d1b16..8e397a69005a 100644
--- a/net/core/link_watch.c
+++ b/net/core/link_watch.c
@@ -120,22 +120,13 @@ static void linkwatch_schedule_work(int urgent)
delay = 0;
/*
- * This is true if we've scheduled it immeditately or if we don't
- * need an immediate execution and it's already pending.
+ * If urgent, schedule immediate execution; otherwise, don't
+ * override the existing timer.
*/
- if (schedule_delayed_work(&linkwatch_work, delay) == !delay)
- return;
-
- /* Don't bother if there is nothing urgent. */
- if (!test_bit(LW_URGENT, &linkwatch_flags))
- return;
-
- /* It's already running which is good enough. */
- if (!__cancel_delayed_work(&linkwatch_work))
- return;
-
- /* Otherwise we reschedule it again for immediate execution. */
- schedule_delayed_work(&linkwatch_work, 0);
+ if (test_bit(LW_URGENT, &linkwatch_flags))
+ mod_delayed_work(system_wq, &linkwatch_work, 0);
+ else
+ schedule_delayed_work(&linkwatch_work, delay);
}