ff_effect_compat
struct ff_effect_compat *compat_effect;
if (size != sizeof(struct ff_effect_compat))
compat_effect = (struct ff_effect_compat *)effect;
sizeof(struct ff_effect_compat)))
struct ff_effect_compat effect;
struct ff_effect_compat old;
sizeof(struct ff_effect_compat));
sizeof(struct ff_effect_compat));
sizeof(struct ff_effect_compat));
sizeof(struct ff_effect_compat));