function(s) not showing up.....

[Cyclone S. <cyc...@ch...>]

oprofile experts,
    I was profiling the 2.6.16 Linux kernel from some performance testing.  I
noticed that the routines:

nm /tmp/vmlinux | egrep 'T spin_lock'
ffffffff802da915 T _spin_lock
ffffffff802da9b7 T _spin_lock_bh
ffffffff802da9ac T _spin_lock_irq
ffffffff802da99f T _spin_lock_irqsave

never made it in the opreport output?  spin_lock() is touched by almost every
file in the linux kernel distro.  Any ideas?

Thanks

-Cyclone