Defined in 2 files as a macro:

• include/uapi/linux/tcp.h, line 100 (as a macro)
• tools/include/uapi/linux/tcp.h, line 100 (as a macro)

Referenced in 3 files:

• net/ipv4/tcp.c
  • line 3556
  • line 3955
• net/mptcp/sockopt.c, line 476
• net/smc/af_smc.c, line 2221