[threads-1,2]
[threads-1,2]
[threads-1,2,3]
[threads-1,2,3] fixed userprog make check
[threads-1,2,3] modifty sema_up, thread_set_priority using high_priority_cmp
[threads-1,2,3,4]
[threads-1,2,3,4] 5-fixed_point.h
[up-all, threads-1,2,3,4]
[threads-all]clear
[userprog-all]clear
[up-all]clear
[up-all]clear