namespace simgrid{
namespace smpi{
/* Non-topology-specific pipelined linear-reduce function */
-int Coll_reduce_arrival_pattern_aware::reduce(void *buf, void *rbuf,
+int Coll_reduce_arrival_pattern_aware::reduce(const void *buf, void *rbuf,
int count,
MPI_Datatype datatype,
MPI_Op op, int root,