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--></style></head><body lang=EN-GB><div class=WordSection1><p class=MsoNormal>I insmod’d the UDP tunnel module for both IPv4 and IPv6 then...<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>During a build on RHEL 8 I came across this:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In file included from <command-line>:<o:p></o:p></p><p class=MsoNormal>/home/****/WireGuard/src/compat/compat.h:815:20: error: redefinition of ‘skb_mark_not_on_list’<o:p></o:p></p><p class=MsoNormal>static inline void skb_mark_not_on_list(struct sk_buff *skb)<o:p></o:p></p><p class=MsoNormal> ^~~~~~~~~~~~~~~~~~~~<o:p></o:p></p><p class=MsoNormal>In file included from /home/****/WireGuard/src/compat/compat.h:777,<o:p></o:p></p><p class=MsoNormal> from <command-line>:<o:p></o:p></p><p class=MsoNormal>./include/linux/skbuff.h:1362:20: note: previous definition of ‘skb_mark_not_on_list’ was here<o:p></o:p></p><p class=MsoNormal>static inline void skb_mark_not_on_list(struct sk_buff *skb)<o:p></o:p></p><p class=MsoNormal> ^~~~~~~~~~~~~~~~~~~~<o:p></o:p></p><p class=MsoNormal>make[2]: *** [scripts/Makefile.build:316: /home/s34cr/WireGuard/src/main.o] Error 1<o:p></o:p></p><p class=MsoNormal>make[1]: *** [Makefile:1528: _module_/home/s34cr/WireGuard/src] Error 2<o:p></o:p></p><p class=MsoNormal>make: *** [Makefile:37: module] Error 2<br><br>I nullified the first definition:<br><br>#if 0<o:p></o:p></p><p class=MsoNormal>static inline void skb_mark_not_on_list(struct sk_buff *skb)<o:p></o:p></p><p class=MsoNormal>{<o:p></o:p></p><p class=MsoNormal style='text-indent:36.0pt'>skb->next = NULL;<o:p></o:p></p><p class=MsoNormal>}<o:p></o:p></p><p class=MsoNormal>#endif<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>And left the second (the include):<o:p></o:p></p><p class=MsoNormal>#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 1, 0)<br>#include <linux/skbuff.h> <br>#define skb_probe_transport_header(a) skb_probe_transport_header(a, 0)<o:p></o:p></p><p class=MsoNormal>#endif<br><br>In order to build. I would like to state RHEL 8 builds with GCC 8.2.1 if that’s any help too. Seems I cannot connect, however. Will try removing the include in the second one.<br><br>Seems somewhere in between the RHEL kernel upgrade to 4.18 that function got added in.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>