--- /dev/null
+//
+// Replace explicit packet offset computations with rte_pktmbuf_mtod_offset().
+//
+@disable paren@
+typedef uint8_t;
+expression M, O;
+@@
+(
+- rte_pktmbuf_mtod(M, char *) + O
++ rte_pktmbuf_mtod_offset(M, char *, O)
+|
+- rte_pktmbuf_mtod(M, char *) - O
++ rte_pktmbuf_mtod_offset(M, char *, -O)
+|
+- rte_pktmbuf_mtod(M, unsigned char *) + O
++ rte_pktmbuf_mtod_offset(M, unsigned char *, O)
+|
+- rte_pktmbuf_mtod(M, unsigned char *) - O
++ rte_pktmbuf_mtod_offset(M, unsigned char *, -O)
+|
+- rte_pktmbuf_mtod(M, uint8_t *) + O
++ rte_pktmbuf_mtod_offset(M, uint8_t *, O)
+|
+- rte_pktmbuf_mtod(M, uint8_t *) - O
++ rte_pktmbuf_mtod_offset(M, uint8_t *, -O)
+)
+
+
+//
+// Fold subsequent offset terms into pre-existing offset used in
+// rte_pktmbuf_mtod_offset().
+//
+@disable paren@
+expression M, O1, O2;
+@@
+(
+- rte_pktmbuf_mtod_offset(M, char *, O1) + O2
++ rte_pktmbuf_mtod_offset(M, char *, O1 + O2)
+|
+- rte_pktmbuf_mtod_offset(M, char *, O1) - O2
++ rte_pktmbuf_mtod_offset(M, char *, O1 - O2)
+|
+- rte_pktmbuf_mtod_offset(M, unsigned char *, O1) + O2
++ rte_pktmbuf_mtod_offset(M, unsigned char *, O1 + O2)
+|
+- rte_pktmbuf_mtod_offset(M, unsigned char *, O1) - O2
++ rte_pktmbuf_mtod_offset(M, unsigned char *, O1 - O2)
+|
+- rte_pktmbuf_mtod_offset(M, uint8_t *, O1) + O2
++ rte_pktmbuf_mtod_offset(M, uint8_t *, O1 + O2)
+|
+- rte_pktmbuf_mtod_offset(M, uint8_t *, O1) - O2
++ rte_pktmbuf_mtod_offset(M, uint8_t *, O1 - O2)
+)
+
+
+//
+// Cleanup rules. Fold in double casts, remove unnecessary paranthesis, etc.
+//
+@disable paren@
+expression M, O;
+type C, T;
+@@
+(
+- (C)rte_pktmbuf_mtod_offset(M, T, O)
++ rte_pktmbuf_mtod_offset(M, C, O)
+|
+- (rte_pktmbuf_mtod_offset(M, T, O))
++ rte_pktmbuf_mtod_offset(M, T, O)
+|
+- (C)rte_pktmbuf_mtod(M, T)
++ rte_pktmbuf_mtod(M, C)
+|
+- (rte_pktmbuf_mtod(M, T))
++ rte_pktmbuf_mtod(M, T)
+)