ppc inline assembly in h files

I'm having problems getting some of my inline asm() code to work.
Browsing the kernel's include/asm-ppc to see how things are done by the
kernel, I notice that the atomic functions in include/asm-ppc/atomic.h
are commented out. Is this due to compiler issues? Is there a version of
gcc that allows such functions to be inlined in asm() statements? When
can inline asm() be used safely?

Thanks

-Jim


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