Why setting cv->head to next of new node

[WweiL]

https://github.com/illinois-cs241/coursebook/blob/1b53e6d38f4fff1f45fc25efd3a24111de35383e/appendix/appendix.tex#L846

I was wondering the purpose of this line here. It seems that it is setting the head again to itself so essentially this line doesn't do anything. Should it be setting head to my_node?

[WweiL]

Also I believe

https://github.com/illinois-cs241/coursebook/blob/1b53e6d38f4fff1f45fc25efd3a24111de35383e/appendix/appendix.tex#L850

should be

while(my_node.is_awoken == 0) {

[WweiL]

And probably the mutex dynamic inside

https://github.com/illinois-cs241/coursebook/blob/1b53e6d38f4fff1f45fc25efd3a24111de35383e/appendix/appendix.tex#L780-L784

should rather be defined inside

https://github.com/illinois-cs241/coursebook/blob/1b53e6d38f4fff1f45fc25efd3a24111de35383e/appendix/appendix.tex#L786-L788