Defined in 2 files as a macro:

• include/net/tcp.h, line 822 (as a macro)
• tools/testing/selftests/bpf/test_tcp_hdr_options.h, line 47 (as a macro)

Referenced in 4 files:

• include/net/tcp.h, line 825
• net/ipv4/tcp_ipv4.c, line 1828
• net/ipv4/tcp_output.c
  • line 315
  • line 339
  • line 352
• net/netfilter/nf_conntrack_proto_tcp.c, line 744