Merge branch 'release-4-6'

[alexxy/gromacs.git] / src / gromacs / gmxlib / thread_mpi / once.c

diff --git a/src/gromacs/gmxlib/thread_mpi/once.c b/src/gromacs/gmxlib/thread_mpi/once.c
index 5c659d095f64ab1ba555b0d711356a973172b7a1..be248ef25a98c0acc2b7da391edeb5e9900b9e64 100644 (file)
--- a/src/gromacs/gmxlib/thread_mpi/once.c
+++ b/src/gromacs/gmxlib/thread_mpi/once.c
@@ -141,7 +141,7 @@ void* tMPI_Once_wait(tMPI_Comm comm, void* (*function)(void*), void *param,
 
         tMPI_Atomic_memory_barrier_rel();
         /* signal that we're done */
-        tMPI_Atomic_add_return(&(cev->coll.current_sync), 1);
+        tMPI_Atomic_fetch_add(&(cev->coll.current_sync), 1);
         /* we need to keep being in sync */
         csync->syncs++;
     }