Include liburing in static build

src/liburing/int_flags.h

@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: MIT */
+#ifndef LIBURING_INT_FLAGS
+#define LIBURING_INT_FLAGS
+
+#define INT_FLAGS_MASK		(IORING_ENTER_REGISTERED_RING |	\
+				 IORING_ENTER_NO_IOWAIT)
+
+enum {
+	INT_FLAG_REG_RING	= IORING_ENTER_REGISTERED_RING,
+	INT_FLAG_NO_IOWAIT	= IORING_ENTER_NO_IOWAIT,
+	INT_FLAG_REG_REG_RING	= 1,
+	INT_FLAG_APP_MEM	= 2,
+	INT_FLAG_CQ_ENTER	= 4,
+};
+
+static inline int ring_enter_flags(struct io_uring *ring)
+{
+	return ring->int_flags & INT_FLAGS_MASK;
+}
+
+#endif