relevant parts below. If you are confident in your HW1 code, you can
build on top of it. However, if you wish you can start with a fresh
copy of the code and re-implement @func{thread_join}, which is the
-only part of project #1 required for this assignment. Your submission
-should define @code{THREAD_JOIN_IMPLEMENTED} in @file{constants.h}
-(@pxref{Conditional Compilation}).
+only part of project #1 required for this assignment.
Up to now, all of the code you have written for Pintos has been part
of the operating system kernel. This means, for example, that all the