RE: [PATCH v3 for-next 13/13] RDMA/rdmavt: Use refcount_t instead of atomic_t on refcount of rvt_mcast
From: Marciniszyn, Mike <hidden>
Date: 2021-05-27 13:08:42
quoted hunk ↗ jump to hunk
+++ b/drivers/infiniband/hw/hfi1/verbs.c@@ -534,7 +534,8 @@ static inline void hfi1_handle_packet(structhfi1_packet *packet, * Notify rvt_multicast_detach() if it is waiting for us * to finish. */ - if (atomic_dec_return(&mcast->refcount) <= 1) + refcount_dec(&mcast->refcount); + if (refcount_read(&mcast->refcount) <= 1) wake_up(&mcast->wait);
Is there refcount_ that preserves the atomic characteristics of the single call? Mike