diff options
| -rw-r--r-- | include/linux/interrupt.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 0a4ce25c1464..3c8a29176258 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -675,10 +675,21 @@ static inline void tasklet_unlock_wait(struct tasklet_struct *t) while (test_bit(TASKLET_STATE_RUN, &t->state)) cpu_relax(); } + +/* + * Do not use in new code. Waiting for tasklets from atomic contexts is + * error prone and should be avoided. + */ +static inline void tasklet_unlock_spin_wait(struct tasklet_struct *t) +{ + while (test_bit(TASKLET_STATE_RUN, &t->state)) + cpu_relax(); +} #else static inline int tasklet_trylock(struct tasklet_struct *t) { return 1; } static inline void tasklet_unlock(struct tasklet_struct *t) { } static inline void tasklet_unlock_wait(struct tasklet_struct *t) { } +static inline void tasklet_unlock_spin_wait(struct tasklet_struct *t) { } #endif extern void __tasklet_schedule(struct tasklet_struct *t); @@ -703,6 +714,17 @@ static inline void tasklet_disable_nosync(struct tasklet_struct *t) smp_mb__after_atomic(); } +/* + * Do not use in new code. Disabling tasklets from atomic contexts is + * error prone and should be avoided. + */ +static inline void tasklet_disable_in_atomic(struct tasklet_struct *t) +{ + tasklet_disable_nosync(t); + tasklet_unlock_spin_wait(t); + smp_mb(); +} + static inline void tasklet_disable(struct tasklet_struct *t) { tasklet_disable_nosync(t); |