Defined in 2 files as a macro:

• include/uapi/linux/tcp.h, line 113 (as a macro)
• tools/include/uapi/linux/tcp.h, line 113 (as a macro)

Referenced in 4 files:

• net/ipv4/tcp.c
  • line 3587
  • line 4096
• net/smc/af_smc.c, line 2191
• tools/testing/selftests/net/reuseport_bpf.c, line 177
• tools/testing/selftests/net/tcp_fastopen_backup_key.c, line 134