fix offset name

include/ck/tensor_operation/gpu/device/masking_specialization.hpp

@@ -52,11 +52,14 @@ struct MaskUpperTriangleFromTopLeftPredicate
 };
 struct MaskUpperTriangleFromBottomRightPredicate
 {
-    MaskUpperTriangleFromBottomRightPredicate() : offset_(0) {}
-    __host__ __device__ void SetOffset(const index_t offset) { offset_ = offset; }
+    MaskUpperTriangleFromBottomRightPredicate() : diagonal_offset_(0) {}
+    __host__ __device__ void SetDiagonalOffset(const index_t diagonal_offset)
+    {
+        diagonal_offset_ = diagonal_offset;
+    }
     __host__ __device__ constexpr bool operator()(index_t m, index_t n) const
     {
-        return n > (m + offset_);
+        return n > (m + diagonal_offset_);
     }
 
     __host__ __device__ constexpr bool
@@ -66,7 +69,7 @@ struct MaskUpperTriangleFromBottomRightPredicate
     }
 
     private:
-    index_t offset_;
+    index_t diagonal_offset_;
 };
 
 // to track the points which need to be set to -inf on C0
@@ -80,7 +83,7 @@ struct C0MatrixMask_impl
                                   MaskUpperTriangleFromBottomRightPredicate>::value)
         {
             if(NRaw > MRaw)
-                predicate_.SetOffset(NRaw - MRaw);
+                predicate_.SetDiagonalOffset(NRaw - MRaw);
         }
     }