Compiler warnings when including cuda/atomic with CUDA 11.2

[maddyscientist]

The following warnings are triggered when including cuda/atomic with CUDA 11.2 with g++-9 when building with -Wall -Wextra

/usr/local/cuda-11.2/bin/../targets/x86_64-linux/include/cuda/std/atomic: In function 'void cuda::__3::atomic_thread_fence(cuda::__3::memory_order, cuda::__3::thread_scope)':
/usr/local/cuda-11.2/bin/../targets/x86_64-linux/include/cuda/std/atomic:161:64: warning: unused parameter '_Scope' [-Wunused-parameter]
  161 | inline __host__ __device__ void atomic_thread_fence(memory_order __m, thread_scope _Scope = thread_scope_system) {

$ nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2021 NVIDIA Corporation
Built on Mon_Jan__4_19:13:17_PST_2021
Cuda compilation tools, release 11.2, V11.2.124
Build cuda_11.2.r11.2/compiler.29467849_0

and

$ g++ --version
g++ (Ubuntu 9.3.0-11ubuntu0~18.04.1) 9.3.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

This warnings wasn't triggered with earlier versions of CUDA (11.0 and 11.1).

[wmaxey]

Thanks for finding this, I will investigate.

Unfortunately we just cut version 1.4.1 which will be in CUDA Toolkit 11.3 and may still produce this warning. The next available fix will be after that release.