rt: Make rust_port_detach less contentious

It still utterly dominates some benchmarks with busy waiting, but at least it
doesn't create lock contention while doing so.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/rt/rust_port.cpp b/src/rt/rust_port.cpp
index bbfa737adec..628d3d70d18 100644
--- a/src/rt/rust_port.cpp
+++ b/src/rt/rust_port.cpp
@@ -25,8 +25,7 @@ void rust_port::detach() {
     // FIXME: Busy waiting until we're the only ref
     bool done = false;
     while (!done) {
-        scoped_lock with(task->port_lock);
-        done = ref_count == 1;
+        done = get_ref_count() == 1;
     }
 }