csum_partial_copy
csum_partial_copy_from_user
		arch/parisc/lib/checksum.c
		We want optimized asm for both of those.
		bug stephen burger about this.

do_check_pgt_cache	arch/parisc/mm/init.c
		NOP. this seems wrong.
		all the other arches have (about) the same thing here.
		sparc64 has some CONFIG_SMP in it.

sigaddset
sigdelset	include/linux/signal.h
		Only i386 and m68k define __HAVE_ARCH_SIG_BITOPS.
		parisc ends up using "generic" code like most other arches.
		Is this an issue?
