Defined in 2 files as a macro:

• include/net/tcp.h, line 371 (as a macro)
• tools/testing/selftests/bpf/bpf_tcp_helpers.h, line 103 (as a macro)

Referenced in 2 files:

• net/ipv4/tcp_input.c
  • line 315
  • line 334
• net/ipv4/tcp_output.c
  • line 375
  • line 376