tools/bpf: sync bpf.h

Sync tools/include/uapi/linux/bpf.h from include/uapi.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 1cddc39..97e1fd1 100644 (file)
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -73,7 +73,7 @@ struct bpf_insn {
 /* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */
 struct bpf_lpm_trie_key {
        __u32   prefixlen;      /* up to 32 for AF_INET, 128 for AF_INET6 */
-       __u8    data[]; /* Arbitrary size */
+       __u8    data[0];        /* Arbitrary size */
 };
 
 struct bpf_cgroup_storage_key {
@@ -2019,8 +2019,8 @@ union bpf_attr {
  * int bpf_xdp_adjust_tail(struct xdp_buff *xdp_md, int delta)
  *     Description
  *             Adjust (move) *xdp_md*\ **->data_end** by *delta* bytes. It is
- *             only possible to shrink the packet as of this writing,
- *             therefore *delta* must be a negative integer.
+ *             possible to both shrink and grow the packet tail.
+ *             Shrink done via *delta* being a negative integer.
  *
  *             A call to this helper is susceptible to change the underlying
  *             packet buffer. Therefore, at load time, all checks on pointers