Defined in 1 files as a macro:

• include/uapi/linux/in6.h, line 148 (as a macro)

Referenced in 3 files:

• net/ipv6/exthdrs.c, line 178
• net/ipv6/ioam6_iptunnel.c, line 216
• tools/testing/selftests/net/ioam6_parser.c, line 1078