linehandle_state
static long linehandle_set_config(struct linehandle_state *lh,
struct linehandle_state *lh = file->private_data;
static void linehandle_free(struct linehandle_state *lh)
DEFINE_FREE(linehandle_free, struct linehandle_state *, if (!IS_ERR_OR_NULL(_T)) linehandle_free(_T))
struct linehandle_state *lh __free(linehandle_free) = NULL;