pbn_lock_pool
static void return_pbn_lock_to_pool(struct pbn_lock_pool *pool, struct pbn_lock *lock)
static int make_pbn_lock_pool(size_t capacity, struct pbn_lock_pool **pool_ptr)
struct pbn_lock_pool *pool;
static void free_pbn_lock_pool(struct pbn_lock_pool *pool)
static int __must_check borrow_pbn_lock_from_pool(struct pbn_lock_pool *pool,
struct pbn_lock_pool *lock_pool;