Possible Missing Memory Barrier on powerpc platform

[jennifer at oarcorp.com]

I am having some strange problems on a powerpc platform and started
looking at sorce to validate that the Memory Barrier was around all
portions of inline asm that should contain it.  I have only started
looking at this but have a question on the file
c/src/lib/libcpu/powerpc/shared/src/cache.c.  Shouldn't there be a be a
barrier around the macros for PPC_Get_HID0 and PPC_Set_HID0.

Thanks
Jennifer Averett