diff --git a/src/include/liburing/io_uring.h b/src/include/liburing/io_uring.h
index 01c36a8..48c440e 100644
--- a/src/include/liburing/io_uring.h
+++ b/src/include/liburing/io_uring.h
@@ -116,7 +116,7 @@ struct io_uring_sqe {
  */
 #define IORING_FILE_INDEX_ALLOC		(~0U)
 
-enum {
+enum io_uring_sqe_flags_bit {
 	IOSQE_FIXED_FILE_BIT,
 	IOSQE_IO_DRAIN_BIT,
 	IOSQE_IO_LINK_BIT,
@@ -184,7 +184,7 @@ enum {
 #define IORING_SETUP_DEFER_TASKRUN	(1U << 13)
 
 /*
- * Application provides ring memory
+ * Application provides the memory for the rings
  */
 #define IORING_SETUP_NO_MMAP		(1U << 14)
 
@@ -265,11 +265,12 @@ enum io_uring_op {
 };
 
 /*
- * sqe->uring_cmd_flags
+ * sqe->uring_cmd_flags		top 8bits aren't available for userspace
  * IORING_URING_CMD_FIXED	use registered buffer; pass this flag
  *				along with setting sqe->buf_index.
  */
 #define IORING_URING_CMD_FIXED	(1U << 0)
+#define IORING_URING_CMD_MASK	IORING_URING_CMD_FIXED
 
 
 /*
@@ -317,15 +318,19 @@ enum io_uring_op {
  * ASYNC_CANCEL flags.
  *
  * IORING_ASYNC_CANCEL_ALL	Cancel all requests that match the given key
- * IORING_ASYNC_CANCEL_FD	  Key off 'fd' for cancelation rather than the
+ * IORING_ASYNC_CANCEL_FD	Key off 'fd' for cancelation rather than the
  *				request 'user_data'
  * IORING_ASYNC_CANCEL_ANY	Match any request
  * IORING_ASYNC_CANCEL_FD_FIXED	'fd' passed in is a fixed descriptor
+ * IORING_ASYNC_CANCEL_USERDATA	Match on user_data, default for no other key
+ * IORING_ASYNC_CANCEL_OP	Match request based on opcode
  */
 #define IORING_ASYNC_CANCEL_ALL	(1U << 0)
 #define IORING_ASYNC_CANCEL_FD	(1U << 1)
 #define IORING_ASYNC_CANCEL_ANY	(1U << 2)
 #define IORING_ASYNC_CANCEL_FD_FIXED	(1U << 3)
+#define IORING_ASYNC_CANCEL_USERDATA	(1U << 4)
+#define IORING_ASYNC_CANCEL_OP	(1U << 5)
 
 /*
  * send/sendmsg and recv/recvmsg flags (sqe->ioprio)
@@ -350,13 +355,13 @@ enum io_uring_op {
  *				IORING_NOTIF_USAGE_ZC_COPIED if data was copied
  *				(at least partially).
  *
- * IORING_RECVSEND_BUNDLE	Used with IOSQE_BUFFER_SELECT. If set, send wil
- *				grab as many buffers from the buffer group ID
- *				given and send them all. The completion result
- *				will be the number of buffers send, with the
- *				starting buffer ID in cqe->flags as per usual
- *				for provided buffer usage. The buffers will be
- *				contigious from the starting buffer ID.
+ * IORING_RECVSEND_BUNDLE	Used with IOSQE_BUFFER_SELECT. If set, send or
+ *				recv will grab as many buffers from the buffer
+ *				group ID given and send them all. The completion
+ *				result 	will be the number of buffers send, with
+ *				the starting buffer ID in cqe->flags as per
+ *				usual for provided buffer usage. The buffers
+ *				will be	contigious from the starting buffer ID.
  */
 #define IORING_RECVSEND_POLL_FIRST	(1U << 0)
 #define IORING_RECV_MULTISHOT		(1U << 1)
@@ -383,7 +388,7 @@ enum io_uring_op {
 /*
  * IORING_OP_MSG_RING command types, stored in sqe->addr
  */
-enum {
+enum io_uring_msg_ring_flags {
 	IORING_MSG_DATA,	/* pass sqe->len as 'res' and off as user_data */
 	IORING_MSG_SEND_FD,	/* send a registered fd to another ring */
 };
@@ -416,7 +421,7 @@ enum {
  * IO completion data structure (Completion Queue Entry)
  */
 struct io_uring_cqe {
-	__u64	user_data;	/* sqe->user_data value passed back */
+	__u64	user_data;	/* sqe->data submission passed back */
 	__s32	res;		/* result code for this event */
 	__u32	flags;
 
@@ -441,9 +446,7 @@ struct io_uring_cqe {
 #define IORING_CQE_F_SOCK_NONEMPTY	(1U << 2)
 #define IORING_CQE_F_NOTIF		(1U << 3)
 
-enum {
-	IORING_CQE_BUFFER_SHIFT		= 16,
-};
+#define IORING_CQE_BUFFER_SHIFT		16
 
 /*
  * Magic offsets for the application to mmap the data it needs
@@ -504,6 +507,7 @@ struct io_cqring_offsets {
 #define IORING_ENTER_SQ_WAIT		(1U << 2)
 #define IORING_ENTER_EXT_ARG		(1U << 3)
 #define IORING_ENTER_REGISTERED_RING	(1U << 4)
+#define IORING_ENTER_ABS_TIMER		(1U << 5)
 
 /*
  * Passed in for io_uring_setup(2). Copied back with updated info on success
@@ -543,7 +547,7 @@ struct io_uring_params {
 /*
  * io_uring_register(2) opcodes and arguments
  */
-enum {
+enum io_uring_register_op {
 	IORING_REGISTER_BUFFERS			= 0,
 	IORING_UNREGISTER_BUFFERS		= 1,
 	IORING_REGISTER_FILES			= 2,
@@ -592,6 +596,8 @@ enum {
 	IORING_REGISTER_NAPI			= 27,
 	IORING_UNREGISTER_NAPI			= 28,
 
+	IORING_REGISTER_CLOCK			= 29,
+
 	/* this goes last */
 	IORING_REGISTER_LAST,
 
@@ -600,7 +606,7 @@ enum {
 };
 
 /* io-wq worker categories */
-enum {
+enum io_wq_type {
 	IO_WQ_BOUND,
 	IO_WQ_UNBOUND,
 };
@@ -672,6 +678,11 @@ struct io_uring_restriction {
 	__u32 resv2[3];
 };
 
+struct io_uring_clock_register {
+	__u32	clockid;
+	__u32	__resv[3];
+};
+
 struct io_uring_buf {
 	__u64	addr;
 	__u32	len;
@@ -691,7 +702,7 @@ struct io_uring_buf_ring {
 			__u16	resv3;
 			__u16	tail;
 		};
-		struct io_uring_buf	bufs[0];
+		__DECLARE_FLEX_ARRAY(struct io_uring_buf, bufs);
 	};
 };
 
@@ -705,7 +716,7 @@ struct io_uring_buf_ring {
  *			IORING_OFF_PBUF_RING | (bgid << IORING_OFF_PBUF_SHIFT)
  *			to get a virtual mapping for the ring.
  */
-enum {
+enum io_uring_register_pbuf_ring_flags {
 	IOU_PBUF_RING_MMAP	= 1,
 };
 
@@ -727,16 +738,16 @@ struct io_uring_buf_status {
 
 /* argument for IORING_(UN)REGISTER_NAPI */
 struct io_uring_napi {
-	__u32   busy_poll_to;
-	__u8    prefer_busy_poll;
-	__u8    pad[3];
-	__u64   resv;
+	__u32	busy_poll_to;
+	__u8	prefer_busy_poll;
+	__u8	pad[3];
+	__u64	resv;
 };
 
 /*
  * io_uring_restriction->opcode values
  */
-enum {
+enum io_uring_register_restriction_op {
 	/* Allow an io_uring_register(2) opcode */
 	IORING_RESTRICTION_REGISTER_OP		= 0,
 
@@ -767,7 +778,9 @@ struct io_uring_sync_cancel_reg {
 	__s32				fd;
 	__u32				flags;
 	struct __kernel_timespec	timeout;
-	__u64				pad[4];
+	__u8				opcode;
+	__u8				pad[7];
+	__u64				pad2[3];
 };
 
 /*
@@ -790,7 +803,7 @@ struct io_uring_recvmsg_out {
 /*
  * Argument for IORING_OP_URING_CMD when file is a socket
  */
-enum {
+enum io_uring_socket_op {
 	SOCKET_URING_OP_SIOCINQ		= 0,
 	SOCKET_URING_OP_SIOCOUTQ,
 	SOCKET_URING_OP_GETSOCKOPT,
