ww_class
ww_acquire_init(struct ww_acquire_ctx *ctx, struct ww_class *ww_class)
ww_mutex_init(struct ww_mutex *lock, struct ww_class *ww_class)
linux_mutex_init(&lock->base, ww_class->mutex_name, SX_NOWITNESS);
struct ww_class name = { \
#define DEFINE_WW_MUTEX(name, ww_class) \
ww_mutex_init(&name, &ww_class); \