2009.09.06
Now I modified /usr/src/linux/arch/i386/kernel/entry.S to add three new
system slots. Also updated /usr/src/linux/include/asm/unistd.h
  191 - my_syscall
  192 - my_syscall_ret   with a return value
  193 - my_syscall_parm  with one parameter and a return value
I also need to amend the number of syscalls at the end of entry.S

2009.09.06
This time I just did a make dep and then a make without a make clean. And then
when the make broke on a source file (drivers/video/vesafb.c) then I just did
a touch on that file, followed by a make dep and make. Got me through the
compile.

2009.09.05
I changed /usr/src/linux/include/linux/version.h to be 2.2.19 instead
of the original 2.2.17. The release seems to be 2.2.19 but the source code is
listed at 2.2.17. I also had to change the Makefile to the 2.2.19 version.

------------------------------------------------------------------------------
These notes about the syscall-58 kernel...

2009.08.22
It took many passes to recompile the kernel with the new my_syscall. I kept
getting cpp1 errors, compiler internal errors, and occasional seg faults.
The system still boots and runs the my_syscall program.

2009.08.22
I added a symbolic link
from /usr/src/linux/kernel/my_syscall.o 
to   /root/oslabs/syscall/syscall.o
You have to put this link back after every make clean.

I modified the top level Makefile and added
  kernel/my_syscall.o to CORE_FILES
Probably better to just directly reference /root/oslabs/syscall/syscall.o

I modified /usr/src/linux/arch/i386/kernel/entry.S to
replace sys_ni_syscall with my_syscall at number 58 (old ulimit)