workqueue: use mod_delayed_work() instead of cancel + queue
Convert delayed_work users doing cancel_delayed_work() followed by
queue_delayed_work() to mod_delayed_work().
Most conversions are straight-forward. Ones worth mentioning are,
* drivers/edac/edac_mc.c: edac_mc_workq_setup() converted to always
use mod_delayed_work() and cancel loop in
edac_mc_reset_delay_period() is dropped.
* drivers/platform/x86/thinkpad_acpi.c: No need to remember whether
watchdog is active or not. @fan_watchdog_active and related code
dropped.
* drivers/power/charger-manager.c: Seemingly a lot of
delayed_work_pending() abuse going on here.
[delayed_]work_pending() are unsynchronized and racy when used like
this. I converted one instance in fullbatt_handler(). Please
conver the rest so that it invokes workqueue APIs for the intended
target state rather than trying to game work item pending state
transitions. e.g. if timer should be modified - call
mod_delayed_work(), canceled - call cancel_delayed_work[_sync]().
* drivers/thermal/thermal_sys.c: thermal_zone_device_set_polling()
simplified. Note that round_jiffies() calls in this function are
meaningless. round_jiffies() work on absolute jiffies not delta
delay used by delayed_work.
v2: Tomi pointed out that __cancel_delayed_work() users can't be
safely converted to mod_delayed_work(). They could be calling it
from irq context and if that happens while delayed_work_timer_fn()
is running, it could deadlock. __cancel_delayed_work() users are
dropped.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Acked-by: David Howells <dhowells@redhat.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Roland Dreier <roland@kernel.org>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Len Brown <len.brown@intel.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
diff --git a/block/genhd.c b/block/genhd.c
index cac7366..5d8b44a 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1534,10 +1534,8 @@
spin_lock_irq(&ev->lock);
ev->clearing |= mask;
- if (!ev->block) {
- cancel_delayed_work(&ev->dwork);
- queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0);
- }
+ if (!ev->block)
+ mod_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0);
spin_unlock_irq(&ev->lock);
}
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index 616d90b..7c0df4a 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -538,7 +538,7 @@
return;
INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function);
- queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec));
+ mod_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec));
}
/*
@@ -578,21 +578,6 @@
mutex_lock(&mem_ctls_mutex);
- /* scan the list and turn off all workq timers, doing so under lock
- */
- list_for_each(item, &mc_devices) {
- mci = list_entry(item, struct mem_ctl_info, link);
-
- if (mci->op_state == OP_RUNNING_POLL)
- cancel_delayed_work(&mci->work);
- }
-
- mutex_unlock(&mem_ctls_mutex);
-
-
- /* re-walk the list, and reset the poll delay */
- mutex_lock(&mem_ctls_mutex);
-
list_for_each(item, &mc_devices) {
mci = list_entry(item, struct mem_ctl_info, link);
diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index 28058ae..eaec8d7 100644
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -152,13 +152,11 @@
{
unsigned long delay;
- cancel_delayed_work(&work);
-
delay = time - jiffies;
if ((long)delay <= 0)
delay = 1;
- queue_delayed_work(addr_wq, &work, delay);
+ mod_delayed_work(addr_wq, &work, delay);
}
static void queue_req(struct addr_req *req)
diff --git a/drivers/infiniband/hw/nes/nes_hw.c b/drivers/infiniband/hw/nes/nes_hw.c
index d42c9f4..9e0895b 100644
--- a/drivers/infiniband/hw/nes/nes_hw.c
+++ b/drivers/infiniband/hw/nes/nes_hw.c
@@ -2679,11 +2679,9 @@
}
}
if (nesadapter->phy_type[mac_index] == NES_PHY_TYPE_SFP_D) {
- if (nesdev->link_recheck)
- cancel_delayed_work(&nesdev->work);
nesdev->link_recheck = 1;
- schedule_delayed_work(&nesdev->work,
- NES_LINK_RECHECK_DELAY);
+ mod_delayed_work(system_wq, &nesdev->work,
+ NES_LINK_RECHECK_DELAY);
}
}
diff --git a/drivers/infiniband/hw/nes/nes_nic.c b/drivers/infiniband/hw/nes/nes_nic.c
index f3a3ecf..e43f6e4 100644
--- a/drivers/infiniband/hw/nes/nes_nic.c
+++ b/drivers/infiniband/hw/nes/nes_nic.c
@@ -243,10 +243,9 @@
spin_lock_irqsave(&nesdev->nesadapter->phy_lock, flags);
if (nesdev->nesadapter->phy_type[nesdev->mac_index] == NES_PHY_TYPE_SFP_D) {
- if (nesdev->link_recheck)
- cancel_delayed_work(&nesdev->work);
nesdev->link_recheck = 1;
- schedule_delayed_work(&nesdev->work, NES_LINK_RECHECK_DELAY);
+ mod_delayed_work(system_wq, &nesdev->work,
+ NES_LINK_RECHECK_DELAY);
}
spin_unlock_irqrestore(&nesdev->nesadapter->phy_lock, flags);
diff --git a/drivers/net/wireless/ipw2x00/ipw2100.c b/drivers/net/wireless/ipw2x00/ipw2100.c
index 95aa8e1..8a34202 100644
--- a/drivers/net/wireless/ipw2x00/ipw2100.c
+++ b/drivers/net/wireless/ipw2x00/ipw2100.c
@@ -2180,8 +2180,7 @@
/* Make sure the RF Kill check timer is running */
priv->stop_rf_kill = 0;
- cancel_delayed_work(&priv->rf_kill);
- schedule_delayed_work(&priv->rf_kill, round_jiffies_relative(HZ));
+ mod_delayed_work(system_wq, &priv->rf_kill, round_jiffies_relative(HZ));
}
static void send_scan_event(void *data)
@@ -4321,9 +4320,8 @@
"disabled by HW switch\n");
/* Make sure the RF_KILL check timer is running */
priv->stop_rf_kill = 0;
- cancel_delayed_work(&priv->rf_kill);
- schedule_delayed_work(&priv->rf_kill,
- round_jiffies_relative(HZ));
+ mod_delayed_work(system_wq, &priv->rf_kill,
+ round_jiffies_relative(HZ));
} else
schedule_reset(priv);
}
diff --git a/drivers/net/wireless/zd1211rw/zd_usb.c b/drivers/net/wireless/zd1211rw/zd_usb.c
index af83c43..ef2b171 100644
--- a/drivers/net/wireless/zd1211rw/zd_usb.c
+++ b/drivers/net/wireless/zd1211rw/zd_usb.c
@@ -1164,8 +1164,7 @@
{
struct zd_usb_rx *rx = &usb->rx;
- cancel_delayed_work(&rx->idle_work);
- queue_delayed_work(zd_workqueue, &rx->idle_work, ZD_RX_IDLE_INTERVAL);
+ mod_delayed_work(zd_workqueue, &rx->idle_work, ZD_RX_IDLE_INTERVAL);
}
static inline void init_usb_interrupt(struct zd_usb *usb)
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index e7f7328..06d2502 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -7682,25 +7682,15 @@
static void fan_watchdog_reset(void)
{
- static int fan_watchdog_active;
-
if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
return;
- if (fan_watchdog_active)
- cancel_delayed_work(&fan_watchdog_task);
-
if (fan_watchdog_maxinterval > 0 &&
- tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
- fan_watchdog_active = 1;
- if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
- msecs_to_jiffies(fan_watchdog_maxinterval
- * 1000))) {
- pr_err("failed to queue the fan watchdog, "
- "watchdog will not trigger\n");
- }
- } else
- fan_watchdog_active = 0;
+ tpacpi_lifecycle != TPACPI_LIFE_EXITING)
+ mod_delayed_work(tpacpi_wq, &fan_watchdog_task,
+ msecs_to_jiffies(fan_watchdog_maxinterval * 1000));
+ else
+ cancel_delayed_work(&fan_watchdog_task);
}
static void fan_watchdog_fire(struct work_struct *ignored)
diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
index 526e5c9..7ff83cf 100644
--- a/drivers/power/charger-manager.c
+++ b/drivers/power/charger-manager.c
@@ -509,9 +509,8 @@
if (!delayed_work_pending(&cm_monitor_work) ||
(delayed_work_pending(&cm_monitor_work) &&
time_after(next_polling, _next_polling))) {
- cancel_delayed_work_sync(&cm_monitor_work);
next_polling = jiffies + polling_jiffy;
- queue_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy);
+ mod_delayed_work(cm_wq, &cm_monitor_work, polling_jiffy);
}
out:
@@ -546,10 +545,8 @@
if (cm_suspended)
device_set_wakeup_capable(cm->dev, true);
- if (delayed_work_pending(&cm->fullbatt_vchk_work))
- cancel_delayed_work(&cm->fullbatt_vchk_work);
- queue_delayed_work(cm_wq, &cm->fullbatt_vchk_work,
- msecs_to_jiffies(desc->fullbatt_vchkdrop_ms));
+ mod_delayed_work(cm_wq, &cm->fullbatt_vchk_work,
+ msecs_to_jiffies(desc->fullbatt_vchkdrop_ms));
cm->fullbatt_vchk_jiffies_at = jiffies + msecs_to_jiffies(
desc->fullbatt_vchkdrop_ms);
diff --git a/drivers/power/ds2760_battery.c b/drivers/power/ds2760_battery.c
index 076e211..704e652 100644
--- a/drivers/power/ds2760_battery.c
+++ b/drivers/power/ds2760_battery.c
@@ -355,8 +355,7 @@
dev_dbg(di->dev, "%s\n", __func__);
- cancel_delayed_work(&di->monitor_work);
- queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ/10);
+ mod_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ/10);
}
@@ -401,8 +400,7 @@
/* postpone the actual work by 20 secs. This is for debouncing GPIO
* signals and to let the current value settle. See AN4188. */
- cancel_delayed_work(&di->set_charged_work);
- queue_delayed_work(di->monitor_wqueue, &di->set_charged_work, HZ * 20);
+ mod_delayed_work(di->monitor_wqueue, &di->set_charged_work, HZ * 20);
}
static int ds2760_battery_get_property(struct power_supply *psy,
@@ -616,8 +614,7 @@
di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
power_supply_changed(&di->bat);
- cancel_delayed_work(&di->monitor_work);
- queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ);
+ mod_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ);
return 0;
}
diff --git a/drivers/power/jz4740-battery.c b/drivers/power/jz4740-battery.c
index 8dbc7bf..ffbed5e 100644
--- a/drivers/power/jz4740-battery.c
+++ b/drivers/power/jz4740-battery.c
@@ -173,16 +173,14 @@
{
struct jz_battery *jz_battery = psy_to_jz_battery(psy);
- cancel_delayed_work(&jz_battery->work);
- schedule_delayed_work(&jz_battery->work, 0);
+ mod_delayed_work(system_wq, &jz_battery->work, 0);
}
static irqreturn_t jz_battery_charge_irq(int irq, void *data)
{
struct jz_battery *jz_battery = data;
- cancel_delayed_work(&jz_battery->work);
- schedule_delayed_work(&jz_battery->work, 0);
+ mod_delayed_work(system_wq, &jz_battery->work, 0);
return IRQ_HANDLED;
}
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index 2ab31e4..67789b8 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -694,17 +694,14 @@
static void thermal_zone_device_set_polling(struct thermal_zone_device *tz,
int delay)
{
- cancel_delayed_work(&(tz->poll_queue));
-
- if (!delay)
- return;
-
if (delay > 1000)
- queue_delayed_work(system_freezable_wq, &(tz->poll_queue),
- round_jiffies(msecs_to_jiffies(delay)));
+ mod_delayed_work(system_freezable_wq, &tz->poll_queue,
+ round_jiffies(msecs_to_jiffies(delay)));
+ else if (delay)
+ mod_delayed_work(system_freezable_wq, &tz->poll_queue,
+ msecs_to_jiffies(delay));
else
- queue_delayed_work(system_freezable_wq, &(tz->poll_queue),
- msecs_to_jiffies(delay));
+ cancel_delayed_work(&tz->poll_queue);
}
static void thermal_zone_device_passive(struct thermal_zone_device *tz,
diff --git a/fs/afs/callback.c b/fs/afs/callback.c
index 587ef51..7ef637d 100644
--- a/fs/afs/callback.c
+++ b/fs/afs/callback.c
@@ -351,9 +351,7 @@
*/
void afs_flush_callback_breaks(struct afs_server *server)
{
- cancel_delayed_work(&server->cb_break_work);
- queue_delayed_work(afs_callback_update_worker,
- &server->cb_break_work, 0);
+ mod_delayed_work(afs_callback_update_worker, &server->cb_break_work, 0);
}
#if 0
diff --git a/fs/afs/server.c b/fs/afs/server.c
index d59b751..f342acf 100644
--- a/fs/afs/server.c
+++ b/fs/afs/server.c
@@ -285,12 +285,7 @@
expiry = server->time_of_death + afs_server_timeout;
if (expiry > now) {
delay = (expiry - now) * HZ;
- if (!queue_delayed_work(afs_wq, &afs_server_reaper,
- delay)) {
- cancel_delayed_work(&afs_server_reaper);
- queue_delayed_work(afs_wq, &afs_server_reaper,
- delay);
- }
+ mod_delayed_work(afs_wq, &afs_server_reaper, delay);
break;
}
@@ -323,6 +318,5 @@
void __exit afs_purge_servers(void)
{
afs_server_timeout = 0;
- cancel_delayed_work(&afs_server_reaper);
- queue_delayed_work(afs_wq, &afs_server_reaper, 0);
+ mod_delayed_work(afs_wq, &afs_server_reaper, 0);
}
diff --git a/fs/afs/vlocation.c b/fs/afs/vlocation.c
index 431984d..57bcb15 100644
--- a/fs/afs/vlocation.c
+++ b/fs/afs/vlocation.c
@@ -561,12 +561,7 @@
if (expiry > now) {
delay = (expiry - now) * HZ;
_debug("delay %lu", delay);
- if (!queue_delayed_work(afs_wq, &afs_vlocation_reap,
- delay)) {
- cancel_delayed_work(&afs_vlocation_reap);
- queue_delayed_work(afs_wq, &afs_vlocation_reap,
- delay);
- }
+ mod_delayed_work(afs_wq, &afs_vlocation_reap, delay);
break;
}
@@ -614,13 +609,10 @@
spin_lock(&afs_vlocation_updates_lock);
list_del_init(&afs_vlocation_updates);
spin_unlock(&afs_vlocation_updates_lock);
- cancel_delayed_work(&afs_vlocation_update);
- queue_delayed_work(afs_vlocation_update_worker,
- &afs_vlocation_update, 0);
+ mod_delayed_work(afs_vlocation_update_worker, &afs_vlocation_update, 0);
destroy_workqueue(afs_vlocation_update_worker);
- cancel_delayed_work(&afs_vlocation_reap);
- queue_delayed_work(afs_wq, &afs_vlocation_reap, 0);
+ mod_delayed_work(afs_wq, &afs_vlocation_reap, 0);
}
/*
diff --git a/fs/nfs/nfs4renewd.c b/fs/nfs/nfs4renewd.c
index 6930bec..1720d32 100644
--- a/fs/nfs/nfs4renewd.c
+++ b/fs/nfs/nfs4renewd.c
@@ -117,8 +117,7 @@
timeout = 5 * HZ;
dprintk("%s: requeueing work. Lease period = %ld\n",
__func__, (timeout + HZ - 1) / HZ);
- cancel_delayed_work(&clp->cl_renewd);
- schedule_delayed_work(&clp->cl_renewd, timeout);
+ mod_delayed_work(system_wq, &clp->cl_renewd, timeout);
set_bit(NFS_CS_RENEWD, &clp->cl_res_state);
spin_unlock(&clp->cl_lock);
}
diff --git a/net/core/dst.c b/net/core/dst.c
index 069d51d..ed5a0b4 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -214,8 +214,8 @@
if (dst_garbage.timer_inc > DST_GC_INC) {
dst_garbage.timer_inc = DST_GC_INC;
dst_garbage.timer_expires = DST_GC_MIN;
- cancel_delayed_work(&dst_gc_work);
- schedule_delayed_work(&dst_gc_work, dst_garbage.timer_expires);
+ mod_delayed_work(system_wq, &dst_gc_work,
+ dst_garbage.timer_expires);
}
spin_unlock_bh(&dst_garbage.lock);
}
diff --git a/net/rfkill/input.c b/net/rfkill/input.c
index 24c55c5..c9d931e 100644
--- a/net/rfkill/input.c
+++ b/net/rfkill/input.c
@@ -164,8 +164,7 @@
rfkill_op_pending = true;
if (op == RFKILL_GLOBAL_OP_EPO && !rfkill_is_epo_lock_active()) {
/* bypass the limiter for EPO */
- cancel_delayed_work(&rfkill_op_work);
- schedule_delayed_work(&rfkill_op_work, 0);
+ mod_delayed_work(system_wq, &rfkill_op_work, 0);
rfkill_last_scheduled = jiffies;
} else
rfkill_schedule_ratelimited();