Here are the data structures with brief descriptions:

backcmd
buf
cmd
context
cpu
devsw
dinode
dirent
elfhdr
execcmd
file
gatedesc
header
inode
ioapic
listcmd
log
logheader
mp
mpconf
mpioapic
mpproc
pipe
pipecmd
proc
proghdr
redircmd
rtcdate
run
segdesc
spinlock
stat
superblock
taskstate
trapframe