@triton.jit
def chunk_linear_attn_bwd_kernel_dh(q, do, dh, s_k_h, s_k_t, s_k_d, s_v_h,
    s_v_t, s_v_d, s_h_h, s_h_t, scale, T: tl.constexpr, K: tl.constexpr, V:
    tl.constexpr, BT: tl.constexpr, BK: tl.constexpr, BV: tl.constexpr, NT:
    tl.constexpr):
    i_k, i_v, i_bh = tl.program_id(0), tl.program_id(1), tl.program_id(2)
    b_dh = tl.zeros([BK, BV], dtype=tl.float32)
    for i_t in range(NT - 1, -1, -1):
        p_q = tl.make_block_ptr(q + i_bh * s_k_h, (K, T), (s_k_d, s_k_t), (
            i_k * BK, i_t * BT), (BK, BT), (0, 1))
        p_do = tl.make_block_ptr(do + i_bh * s_v_h, (T, V), (s_v_t, s_v_d),
            (i_t * BT, i_v * BV), (BT, BV), (1, 0))
        p_dh = tl.make_block_ptr(dh + i_bh * s_h_h + i_t * K * V, (K, V), (
            s_h_t, 1), (i_k * BK, i_v * BV), (BK, BV), (1, 0))
        tl.store(p_dh, b_dh.to(p_dh.dtype.element_ty), boundary_check=(0, 1))
        b_q = tl.load(p_q, boundary_check=(0, 1))
        b_q = (b_q * scale).to(b_q.dtype)
        b_do = tl.load(p_do, boundary_check=(0, 1))
        b_dh += tl.dot(b_q, b_do.to(b_q.dtype), allow_tf32=False)
