__ww_ctx_less
if (waiter->ww_ctx->acquired > 0 && __ww_ctx_less(waiter->ww_ctx, ww_ctx)) {
if (ww_ctx->acquired > 0 && __ww_ctx_less(hold_ctx, ww_ctx)) {
if (hold_ctx && __ww_ctx_less(ctx, hold_ctx))
if (__ww_ctx_less(ww_ctx, cur->ww_ctx)) {