Simplify code around castIfHalfPointer

cub/test/test_device_histogram.cu

@@ -75,23 +75,11 @@ auto castIfHalfPointer(It it) -> It
   return it;
 }
 
-template <typename T>
-auto castIfArrayOfHalfPointers(T** p) -> T**
-{
-  return p;
-}
-
 #if TEST_HALF_T
 auto castIfHalfPointer(half_t* p) -> __half*
 {
   return reinterpret_cast<__half*>(p);
 }
-
-template <std::size_t N>
-auto castIfArrayOfHalfPointers(half_t** a) -> __half**
-{
-  return reinterpret_cast<__half**>(a);
-}
 #endif
 
 //---------------------------------------------------------------------
@@ -135,7 +123,7 @@ struct Dispatch
         castIfHalfPointer(d_samples),
         d_histogram,
         num_levels,
-        castIfArrayOfHalfPointers(d_levels),
+        castIfHalfPointer(d_levels),
         num_row_pixels,
         num_rows,
         row_stride_bytes);
@@ -211,9 +199,9 @@ struct Dispatch<1, 1>
     int* num_levels, ///< [in] The number of boundaries (levels) for delineating histogram samples in each active
                      ///< channel.  Implies that the number of bins for channel<sub><em>i</em></sub> is
                      ///< <tt>num_levels[i]</tt> - 1.
-    LevelT* d_levels, ///< [in] The pointers to the arrays of boundaries (levels), one for each active channel. Bin
-                      ///< ranges are defined by consecutive boundary pairings: lower sample value boundaries are
-                      ///< inclusive and upper sample value boundaries are exclusive.
+    LevelT** d_levels, ///< [in] The pointers to the arrays of boundaries (levels), one for each active channel. Bin
+                       ///< ranges are defined by consecutive boundary pairings: lower sample value boundaries are
+                       ///< inclusive and upper sample value boundaries are exclusive.
     OffsetT num_row_pixels, ///< [in] The number of multi-channel pixels per row in the region of interest
     OffsetT num_rows, ///< [in] The number of rows in the region of interest
     OffsetT row_stride_bytes) ///< [in] The number of bytes between starts of consecutive rows in the region of interest
@@ -226,7 +214,7 @@ struct Dispatch<1, 1>
         castIfHalfPointer(d_samples),
         d_histogram[0],
         num_levels[0],
-        *castIfHalfPointer(&d_levels[0]),
+        castIfHalfPointer(d_levels)[0],
         num_row_pixels,
         num_rows,
         row_stride_bytes);
@@ -270,8 +258,8 @@ struct Dispatch<1, 1>
         castIfHalfPointer(d_samples),
         d_histogram[0],
         num_levels[0],
-        *castIfHalfPointer(&lower_level[0]),
-        *castIfHalfPointer(&upper_level[0]),
+        castIfHalfPointer(lower_level)[0],
+        castIfHalfPointer(upper_level)[0],
         num_row_pixels,
         num_rows,
         row_stride_bytes);