Hello,
   
    I am trying to access tracepoints from this website https://archive.eclipse.org/tracecompass.incubator/doc/org.eclipse.tracecompass.incubator.virtual.machine.analysis.doc.user/Virtual-Machine-Analysis-User-Documentation.html (kmv_entry, kmv_exit) for my analysis. I added the "addons" folder from the "addons_vm" branch of this repository: https://github.com/tahini/lttng-modules to the current version of lttng-module github repository. However, I am encountering these errors when compiling 
ERROR: modpost: "lttng_tracepoint_probe_register" [lttng-modules/src/addons/lttng-vmsync-guest.ko] undefined!
ERROR: modpost: "lttng_tracepoint_probe_unregister" [Desktop/lttng-modules/src/addons/lttng-vmsync-guest.ko] undefined!
ERROR: modpost: "lttng_tracepoint_probe_register" [Desktop/lttng-modules/src/addons/lttng-vmsync-host.ko] undefined!
ERROR: modpost: "lttng_tracepoint_probe_unregister" [Desktop/lttng-modules/src/addons/lttng-vmsync-host.ko] undefined!

I am not sure how to resolve this issue. Can someone please help me? 

Thanks.