path: root/net
diff options
authorTejun Heo <tj@kernel.org>2012-08-03 10:30:47 -0700
committerTejun Heo <tj@kernel.org>2012-08-13 16:27:37 -0700
commit41f63c5359d14ca995172b8f6eaffd93f60fec54 (patch)
treed3d93dfd25d2e29e8abeae934835f2266b018cb7 /net
parent8376fe22c7e79c7e90857d39f82aeae6cad6c4b8 (diff)
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>
Diffstat (limited to 'net')
2 files changed, 3 insertions, 4 deletions
diff --git a/net/core/dst.c b/net/core/dst.c
index 069d51d2941..ed5a0b409aa 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -214,8 +214,8 @@ void __dst_free(struct dst_entry *dst)
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);
diff --git a/net/rfkill/input.c b/net/rfkill/input.c
index 24c55c53e6a..c9d931e7ffe 100644
--- a/net/rfkill/input.c
+++ b/net/rfkill/input.c
@@ -164,8 +164,7 @@ static void rfkill_schedule_global_op(enum rfkill_sched_op op)
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