update bpf.h
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 65baf0c..b8486d1 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -398,6 +398,27 @@
*/
BPF_FUNC_skb_change_tail,
+ /**
+ * bpf_skb_pull_data(skb, len)
+ * The helper will pull in non-linear data in case the
+ * skb is non-linear and not all of len are part of the
+ * linear section. Only needed for read/write with direct
+ * packet access.
+ * @skb: pointer to skb
+ * @len: len to make read/writeable
+ * Return: 0 on success or negative error
+ */
+ BPF_FUNC_skb_pull_data,
+
+ /**
+ * bpf_csum_update(skb, csum)
+ * Adds csum into skb->csum in case of CHECKSUM_COMPLETE.
+ * @skb: pointer to skb
+ * @csum: csum to add
+ * Return: csum on success or negative error
+ */
+ BPF_FUNC_csum_update,
+
__BPF_FUNC_MAX_ID,
};