Hi, I'm currently trying to "port" a binary-only driver to Linux/PPC : the card manufacturer provides MacOS X and Linux/i386 drivers, providing *some* sources with the Linux driver. The plan is to use the provided sources, and to get the remaining symbols & code from the MacOSX object -- Unfortunately, one of those components makes a call to atomic_clear_mask(), which doesn't seem available on PPC yet. So the question is : is there a workaround for this, and if not, how would you implement this call (I have absolutely no knowledge of PPC assembly). Quickly grepping through kernel headers reveals it is present for i386, arm and x86_64, but not sparc or ppc. Is there a reason for this ? Simon