Defined in 2 files as a macro:

• include/net/tcp.h, line 847 (as a macro)
• tools/testing/selftests/bpf/test_tcp_hdr_options.h, line 48 (as a macro)

Referenced in 4 files:

• include/net/tcp.h, line 849
• net/ipv4/tcp_ipv4.c, line 1861
• net/ipv4/tcp_output.c
  • line 311
  • line 337
  • line 350
• net/netfilter/nf_conntrack_proto_tcp.c, line 827