diff options
| -rw-r--r-- | include/linux/percpu-refcount.h | 2 | ||||
| -rw-r--r-- | lib/percpu-refcount.c | 70 |
2 files changed, 36 insertions, 36 deletions
diff --git a/include/linux/percpu-refcount.h b/include/linux/percpu-refcount.h index 5df6784bd9d2..f015f139d491 100644 --- a/include/linux/percpu-refcount.h +++ b/include/linux/percpu-refcount.h @@ -68,10 +68,10 @@ struct percpu_ref { int __must_check percpu_ref_init(struct percpu_ref *ref, percpu_ref_func_t *release, gfp_t gfp); -void percpu_ref_reinit(struct percpu_ref *ref); void percpu_ref_exit(struct percpu_ref *ref); void percpu_ref_kill_and_confirm(struct percpu_ref *ref, percpu_ref_func_t *confirm_kill); +void percpu_ref_reinit(struct percpu_ref *ref); /** * percpu_ref_kill - drop the initial ref diff --git a/lib/percpu-refcount.c b/lib/percpu-refcount.c index 559ee0b20318..070dab5e7d77 100644 --- a/lib/percpu-refcount.c +++ b/lib/percpu-refcount.c @@ -63,41 +63,6 @@ int percpu_ref_init(struct percpu_ref *ref, percpu_ref_func_t *release, EXPORT_SYMBOL_GPL(percpu_ref_init); /** - * percpu_ref_reinit - re-initialize a percpu refcount - * @ref: perpcu_ref to re-initialize - * - * Re-initialize @ref so that it's in the same state as when it finished - * percpu_ref_init(). @ref must have been initialized successfully, killed - * and reached 0 but not exited. - * - * Note that percpu_ref_tryget[_live]() are safe to perform on @ref while - * this function is in progress. - */ -void percpu_ref_reinit(struct percpu_ref *ref) -{ - unsigned long __percpu *pcpu_count = pcpu_count_ptr(ref); - int cpu; - - BUG_ON(!pcpu_count); - WARN_ON(!percpu_ref_is_zero(ref)); - - atomic_long_set(&ref->count, 1 + PCPU_COUNT_BIAS); - - /* - * Restore per-cpu operation. smp_store_release() is paired with - * smp_read_barrier_depends() in __pcpu_ref_alive() and guarantees - * that the zeroing is visible to all percpu accesses which can see - * the following PCPU_REF_DEAD clearing. - */ - for_each_possible_cpu(cpu) - *per_cpu_ptr(pcpu_count, cpu) = 0; - - smp_store_release(&ref->pcpu_count_ptr, - ref->pcpu_count_ptr & ~PCPU_REF_DEAD); -} -EXPORT_SYMBOL_GPL(percpu_ref_reinit); - -/** * percpu_ref_exit - undo percpu_ref_init() * @ref: percpu_ref to exit * @@ -189,3 +154,38 @@ void percpu_ref_kill_and_confirm(struct percpu_ref *ref, call_rcu_sched(&ref->rcu, percpu_ref_kill_rcu); } EXPORT_SYMBOL_GPL(percpu_ref_kill_and_confirm); + +/** + * percpu_ref_reinit - re-initialize a percpu refcount + * @ref: perpcu_ref to re-initialize + * + * Re-initialize @ref so that it's in the same state as when it finished + * percpu_ref_init(). @ref must have been initialized successfully, killed + * and reached 0 but not exited. + * + * Note that percpu_ref_tryget[_live]() are safe to perform on @ref while + * this function is in progress. + */ +void percpu_ref_reinit(struct percpu_ref *ref) +{ + unsigned long __percpu *pcpu_count = pcpu_count_ptr(ref); + int cpu; + + BUG_ON(!pcpu_count); + WARN_ON(!percpu_ref_is_zero(ref)); + + atomic_long_set(&ref->count, 1 + PCPU_COUNT_BIAS); + + /* + * Restore per-cpu operation. smp_store_release() is paired with + * smp_read_barrier_depends() in __pcpu_ref_alive() and guarantees + * that the zeroing is visible to all percpu accesses which can see + * the following PCPU_REF_DEAD clearing. + */ + for_each_possible_cpu(cpu) + *per_cpu_ptr(pcpu_count, cpu) = 0; + + smp_store_release(&ref->pcpu_count_ptr, + ref->pcpu_count_ptr & ~PCPU_REF_DEAD); +} +EXPORT_SYMBOL_GPL(percpu_ref_reinit); |
