Merge pull request open-mpi#12497 from wenduwan/han_compiler_warnings

coll/han: fix compiler warnings

Author: wenduwan

ompi/mca/coll/han/coll_han.h

@@ -522,7 +522,7 @@ ompi_coll_han_reorder_gather(const void *sbuf,
                              int * topo);
 
 size_t
-coll_han_utils_gcd(const size_t *numerators, const size_t size);
+coll_han_utils_gcd(const uint64_t *numerators, const size_t size);
 
 int
 coll_han_utils_create_contiguous_datatype(size_t count, const ompi_datatype_t *oldType,

ompi/mca/coll/han/coll_han_reduce.c

@@ -132,7 +132,6 @@ mca_coll_han_reduce_intra(const void *sbuf,
     int *vranks = han_module->cached_vranks;
     int low_rank = ompi_comm_rank(low_comm);
     int low_size = ompi_comm_size(low_comm);
-    int up_rank  = ompi_comm_rank(up_comm);
 
     int root_low_rank;
     int root_up_rank;

ompi/mca/coll/han/coll_han_utils.c

@@ -25,12 +25,12 @@
  * @param[in]   size            Number of numerators
  * @returns     The GCD, where 1 <= GCD
  */
-size_t coll_han_utils_gcd(const size_t *numerators, const size_t size)
+size_t coll_han_utils_gcd(const uint64_t *numerators, const size_t size)
 {
-    size_t denominator = numerators[0], numerator, tmp;
+    size_t denominator = (size_t) numerators[0], numerator, tmp;
 
     for (size_t i = 1; i < size; ++i) {
-        numerator = numerators[i];
+        numerator = (size_t) numerators[i];
 
         if (0 == denominator) {
             denominator = numerator;