X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/02ff1e3cc5ba31c8f2c95f27c5934b427e238993..488dda0c43d26f0a770e1d5b47f73148e153949b:/src/smpi/colls/reduce/reduce-flat-tree.cpp

diff --git a/src/smpi/colls/reduce/reduce-flat-tree.cpp b/src/smpi/colls/reduce/reduce-flat-tree.cpp
index 46b0496769..ef3ae9c8cf 100644
--- a/src/smpi/colls/reduce/reduce-flat-tree.cpp
+++ b/src/smpi/colls/reduce/reduce-flat-tree.cpp
@@ -9,7 +9,7 @@
 namespace simgrid{
 namespace smpi{
 int
-Coll_reduce_flat_tree::reduce(void *sbuf, void *rbuf, int count,
+Coll_reduce_flat_tree::reduce(const void *sbuf, void *rbuf, int count,
                                  MPI_Datatype dtype, MPI_Op op,
                                  int root, MPI_Comm comm)
 {
@@ -18,7 +18,7 @@ Coll_reduce_flat_tree::reduce(void *sbuf, void *rbuf, int count,
   int rank;
   MPI_Aint extent;
   char *origin = 0;
-  char *inbuf;
+  const char *inbuf;
   MPI_Status status;
 
   rank = comm->rank();
@@ -50,7 +50,7 @@ Coll_reduce_flat_tree::reduce(void *sbuf, void *rbuf, int count,
 
   for (i = size - 2; i >= 0; --i) {
     if (rank == i)
-      inbuf = static_cast<char*>(sbuf);
+      inbuf = static_cast<const char*>(sbuf);
     else {
       Request::recv(origin, count, dtype, i, tag, comm, &status);
       inbuf = origin;