From cfd720e1fcd6efff11b06e571a18bf85677db210 Mon Sep 17 00:00:00 2001
From: Stan Gerald Moore <stamoor@sandia.gov>
Date: Mon, 31 Jan 2022 09:58:44 -0700
Subject: [PATCH] Remove another volatile return type to avoid warning

---
 src/KOKKOS/fix_langevin_kokkos.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/KOKKOS/fix_langevin_kokkos.h b/src/KOKKOS/fix_langevin_kokkos.h
index 3bb076b561..96b61532e6 100644
--- a/src/KOKKOS/fix_langevin_kokkos.h
+++ b/src/KOKKOS/fix_langevin_kokkos.h
@@ -45,11 +45,10 @@ namespace LAMMPS_NS {
     }
 
     KOKKOS_INLINE_FUNCTION
-    volatile s_FSUM& operator+=(const volatile s_FSUM &rhs) volatile {
+    void operator+=(const volatile s_FSUM &rhs) volatile {
       fx += rhs.fx;
       fy += rhs.fy;
       fz += rhs.fz;
-      return *this;
     }
   };
   typedef s_FSUM FSUM;