use lock# to solve deadlock?

[lyf <liuyunfei@routerd.com>]

Hello experts,

I believe that my GX1-based system goes into deadlock when devices work on secondary pci bus of PPB(intel 21150 or ti pci2050). And I found in spec that signal lock# can be used to solve deadlock.Now I wonder how to 
generate lock#. I found in GX1 datasheet that some instructions with a prefix "lock" can generate signal lock#.
But how about it in C language ? 

Thanks in advance!

Liu Yunfei