Defined in 3 files as a macro:

• include/uapi/linux/tcp.h, line 109 (as a macro)
• tools/include/uapi/linux/tcp.h, line 106 (as a macro)
• tools/testing/selftests/bpf/progs/bpf_tracing_net.h, line 54 (as a macro)

Referenced in 4 files:

• net/core/filter.c, line 5583
• net/ipv4/tcp.c
  • line 3971
  • line 4621
• net/mptcp/sockopt.c, line 560
• tools/testing/selftests/bpf/progs/setget_sockopt.c, line 59