o  Do not include <machine/pmc_mdep.h>. It's automaticly included for    us when <sys/pmc.h> is included. o  Replace "#if __i386__" and "#if __amd64__" with the equivalent of    "#ifdef __i386__" and "#ifdef __amd64__" (resp.) These tokens are    not defined on all platforms. o  Conditionally compile pmc_parse_mask() on i386 and amd64 only. It's    only referenced there. This will change when support for other    platforms is added, of course.
o  Do not include <machine/pmc_mdep.h>. It's automaticly included for
   us when <sys/pmc.h> is included.
o  Replace "#if __i386__" and "#if __amd64__" with the equivalent of
   "#ifdef __i386__" and "#ifdef __amd64__" (resp.) These tokens are
   not defined on all platforms.
o  Conditionally compile pmc_parse_mask() on i386 and amd64 only. It's
   only referenced there. This will change when support for other
   platforms is added, of course.

Ok'd by: jkoshy@

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