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| author | Tejun Heo <tj@kernel.org> | 2012-08-21 13:18:24 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2012-08-21 13:18:24 -0700 |
| commit | e0aecdd874d78b7129a64b056c20e529e2c916df (patch) | |
| tree | 0eacde209b1f46beb5293537c85ab8217c7023f4 /include/linux | |
| parent | f991b318cc6627a493b0d317a565bb7c3271f36b (diff) | |
| download | linux-stable-e0aecdd874d78b7129a64b056c20e529e2c916df.tar.gz linux-stable-e0aecdd874d78b7129a64b056c20e529e2c916df.tar.bz2 linux-stable-e0aecdd874d78b7129a64b056c20e529e2c916df.zip | |
workqueue: use irqsafe timer for delayed_work
Up to now, for delayed_works, try_to_grab_pending() couldn't be used
from IRQ handlers because IRQs may happen while
delayed_work_timer_fn() is in progress leading to indefinite -EAGAIN.
This patch makes delayed_work use the new TIMER_IRQSAFE flag for
delayed_work->timer. This makes try_to_grab_pending() and thus
mod_delayed_work_on() safe to call from IRQ handlers.
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/workqueue.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h index e84ebb69607d..d86b320319e0 100644 --- a/include/linux/workqueue.h +++ b/include/linux/workqueue.h @@ -136,7 +136,8 @@ struct execute_work { #define __DELAYED_WORK_INITIALIZER(n, f, tflags) { \ .work = __WORK_INITIALIZER((n).work, (f)), \ .timer = __TIMER_INITIALIZER(delayed_work_timer_fn, \ - 0, (unsigned long)&(n), (tflags)), \ + 0, (unsigned long)&(n), \ + (tflags) | TIMER_IRQSAFE), \ } #define DECLARE_WORK(n, f) \ @@ -214,7 +215,8 @@ static inline unsigned int work_static(struct work_struct *work) { return 0; } do { \ INIT_WORK(&(_work)->work, (_func)); \ __setup_timer(&(_work)->timer, delayed_work_timer_fn, \ - (unsigned long)(_work), (_tflags)); \ + (unsigned long)(_work), \ + (_tflags) | TIMER_IRQSAFE); \ } while (0) #define __INIT_DELAYED_WORK_ONSTACK(_work, _func, _tflags) \ @@ -223,7 +225,7 @@ static inline unsigned int work_static(struct work_struct *work) { return 0; } __setup_timer_on_stack(&(_work)->timer, \ delayed_work_timer_fn, \ (unsigned long)(_work), \ - (_tflags)); \ + (_tflags) | TIMER_IRQSAFE); \ } while (0) #define INIT_DELAYED_WORK(_work, _func) \ |