From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Mon, 14 Feb 2022 05:08:45 +0000 (-0700)
Subject: Use the correct data type for a buffer size variable.
X-Git-Tag: v9.4.0-rc1~486^2~1
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=db76c7f2f0869183c9b7d8e4d99bbaa679643f43;p=dealii.git

Use the correct data type for a buffer size variable.
---

diff --git a/include/deal.II/base/mpi.h b/include/deal.II/base/mpi.h
index 77ea392a58..c3459641a2 100644
--- a/include/deal.II/base/mpi.h
+++ b/include/deal.II/base/mpi.h
@@ -1851,7 +1851,7 @@ namespace Utilities
       (void)n_procs;
 
       std::vector<char> buffer;
-      unsigned int      buffer_size = numbers::invalid_unsigned_int;
+      std::size_t       buffer_size = numbers::invalid_size_type;
 
       // On the root process, pack the data and determine what the
       // buffer size needs to be.
@@ -1862,7 +1862,11 @@ namespace Utilities
         }
 
       // Exchange the size of buffer
-      int ierr = MPI_Bcast(&buffer_size, 1, MPI_UNSIGNED, root_process, comm);
+      int ierr = MPI_Bcast(&buffer_size,
+                           1,
+                           internal::mpi_type_id(&buffer_size),
+                           root_process,
+                           comm);
       AssertThrowMPI(ierr);
 
       // If not on the root process, correctly size the buffer to