From 462db191dbf8439b5a3bd3495b1e8f2a73912622 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Sat, 8 Jul 2023 22:53:09 -0600
Subject: [PATCH] Make input arguments 'const'.

---
 include/deal.II/lac/cuda_vector.h | 6 +++---
 source/lac/cuda_vector.cc         | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/deal.II/lac/cuda_vector.h b/include/deal.II/lac/cuda_vector.h
index be68d1ed95..3fcbe3f6d8 100644
--- a/include/deal.II/lac/cuda_vector.h
+++ b/include/deal.II/lac/cuda_vector.h
@@ -140,9 +140,9 @@ namespace LinearAlgebra
       void
       import_elements(
         const ReadWriteVector<Number> &V,
-        VectorOperation::values        operation,
-        std::shared_ptr<const Utilities::MPI::CommunicationPatternBase>
-          communication_pattern = {});
+        const VectorOperation::values  operation,
+        const std::shared_ptr<const Utilities::MPI::CommunicationPatternBase>
+          &communication_pattern = {});
 
       /**
        * @deprecated Use import_elements() instead.
diff --git a/source/lac/cuda_vector.cc b/source/lac/cuda_vector.cc
index 9e3e54ef37..60d24750a7 100644
--- a/source/lac/cuda_vector.cc
+++ b/source/lac/cuda_vector.cc
@@ -128,8 +128,8 @@ namespace LinearAlgebra
     void
     Vector<Number>::import_elements(
       const ReadWriteVector<Number> &V,
-      VectorOperation::values        operation,
-      std::shared_ptr<const Utilities::MPI::CommunicationPatternBase>)
+      const VectorOperation::values  operation,
+      const std::shared_ptr<const Utilities::MPI::CommunicationPatternBase> &)
     {
       if (operation == VectorOperation::insert)
         {
-- 
2.39.5