cleanup

Signed-off-by: Alexander Droste <alexander.droste@protonmail.com>

Author: 0ax1

vortex-cuda/ffi/src/lib.rs

@@ -34,8 +34,10 @@ use vortex_ffi::vx_session_ref;
 const VX_CUDA_OK: c_int = 0;
 const VX_CUDA_ERR: c_int = 1;
 
-/// Return a session with a [`CudaSession`], creating one with [`CudaSession::try_default`] if
-/// missing.
+/// Return a Vortex session with a [`CudaSession`] session variable.
+///
+/// If `session` already has CUDA support, this returns a clone of it. Otherwise it
+/// returns a new session cloned from `session` with a default [`CudaSession`] attached.
 fn session_with_cuda(session: &VortexSession) -> VortexResult<VortexSession> {
     if session.get_opt::<CudaSession>().is_some() {
         return Ok(session.clone());