diff options
Diffstat (limited to 'include/linux/closure.h')
| -rw-r--r-- | include/linux/closure.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/closure.h b/include/linux/closure.h index 99155df162d0..59b8c06b11ff 100644 --- a/include/linux/closure.h +++ b/include/linux/closure.h @@ -285,6 +285,21 @@ static inline void closure_get(struct closure *cl) } /** + * closure_get_not_zero + */ +static inline bool closure_get_not_zero(struct closure *cl) +{ + unsigned old = atomic_read(&cl->remaining); + do { + if (!(old & CLOSURE_REMAINING_MASK)) + return false; + + } while (!atomic_try_cmpxchg_acquire(&cl->remaining, &old, old + 1)); + + return true; +} + +/** * closure_init - Initialize a closure, setting the refcount to 1 * @cl: closure to initialize * @parent: parent of the new closure. cl will take a refcount on it for its @@ -310,6 +325,12 @@ static inline void closure_init_stack(struct closure *cl) atomic_set(&cl->remaining, CLOSURE_REMAINING_INITIALIZER); } +static inline void closure_init_stack_release(struct closure *cl) +{ + memset(cl, 0, sizeof(struct closure)); + atomic_set_release(&cl->remaining, CLOSURE_REMAINING_INITIALIZER); +} + /** * closure_wake_up - wake up all closures on a wait list, * with memory barrier @@ -355,6 +376,8 @@ do { \ */ #define closure_return(_cl) continue_at((_cl), NULL, NULL) +void closure_return_sync(struct closure *cl); + /** * continue_at_nobarrier - jump to another function without barrier * |