.map = generic_pipe_buf_map,
.unmap = generic_pipe_buf_unmap,
.map = generic_pipe_buf_map,
.unmap = generic_pipe_buf_unmap,
.confirm = generic_pipe_buf_confirm,
.release = lib_ring_buffer_pipe_buf_release,
.steal = generic_pipe_buf_steal,
.confirm = generic_pipe_buf_confirm,
.release = lib_ring_buffer_pipe_buf_release,
.steal = generic_pipe_buf_steal,