fixup! Add initial OpenACC port of atm_advance_acoustic_step_work

Author: gdicker1

src/core_atmosphere/dynamics/mpas_atm_time_integration.F

@@ -2484,7 +2484,7 @@ subroutine atm_advance_acoustic_step_work(nCells, nEdges, nCellsSolve, cellStart
         !MGD this loop will not be very load balanced with if-test below
 
         !$acc parallel default(present)
-        !$acc loop gang
+        !$acc loop gang worker
         do iEdge=edgeStart,edgeEnd ! MGD do we really just need edges touching owned cells?
 
            cell1 = cellsOnEdge(1,iEdge)
@@ -2513,7 +2513,7 @@ subroutine atm_advance_acoustic_step_work(nCells, nEdges, nCellsSolve, cellStart
       else !  this is all that us needed for ru_p update for first acoustic step in RK substep
 
         !$acc parallel default(present)
-        !$acc loop gang
+        !$acc loop gang worker
         do iEdge=edgeStart,edgeEnd ! MGD do we really just need edges touching owned cells?
 
            cell1 = cellsOnEdge(1,iEdge)
@@ -2538,13 +2538,13 @@ subroutine atm_advance_acoustic_step_work(nCells, nEdges, nCellsSolve, cellStart
 
       if (small_step == 1) then  ! initialize here on first small timestep.
          !$acc parallel default(present)
-         !$acc loop collapse(2)
+         !$acc loop gang worker vector collapse(2)
          do iCell=cellStart,cellEnd
             do k=1,nVertLevels
                rtheta_pp_old(k,iCell) = 0.0
             end do
          end do
-         !$acc loop gang
+         !$acc loop gang worker
          do iCell=cellSolveStart,cellSolveEnd
             !$acc loop vector
             do k=1,nVertLevels
@@ -2571,7 +2571,7 @@ subroutine atm_advance_acoustic_step_work(nCells, nEdges, nCellsSolve, cellStart
 !$OMP BARRIER
 
       !$acc parallel default(present)
-      !$acc loop gang private(ts,rs)
+      !$acc loop gang worker private(ts,rs)
       do iCell=cellSolveStart,cellSolveEnd  ! loop over all owned cells to solve
 
          if(specZoneMaskCell(iCell) == 0.0) then  ! not specified zone, compute...