bpf, docs: Clarify which legacy packet instructions existed

[linux-2.6-microblaze.git] / Documentation / bpf / standardization / instruction-set.rst

diff --git a/Documentation/bpf/standardization/instruction-set.rst b/Documentation/bpf/standardization/instruction-set.rst
index fceacca..dcbc919 100644 (file)
--- a/Documentation/bpf/standardization/instruction-set.rst
+++ b/Documentation/bpf/standardization/instruction-set.rst
@@ -630,7 +630,9 @@ Legacy BPF Packet access instructions
 -------------------------------------
 
 BPF previously introduced special instructions for access to packet data that were
-carried over from classic BPF. However, these instructions are
+carried over from classic BPF. These instructions used an instruction
+class of BPF_LD, a size modifier of BPF_W, BPF_H, or BPF_B, and a
+mode modifier of BPF_ABS or BPF_IND.  However, these instructions are
 deprecated and should no longer be used.  All legacy packet access
 instructions belong to the "legacy" conformance group instead of the "basic"
 conformance group.