[PATCH] x86-64 update

[PATCH] x86-64 update

Nothing too exciting, just some minor new features and bug fixes.
The IOMMU code should now not BUG again without CONFIG_IOMMU_DEBUG/iommu=force

 - Compiles now with -funit-at-a-time
 - Fix up ioctl 32bit tables following Andrew's change.
 - Fix __SI_POLL siginfo_t passing to user space
 - Add 32bit emulation for fadvise64_64
 - Remove unneeded sys32_utimes
 - Various merges with i386 (ACPI, APIC etc.)
 - Port cpuid patching infrastructure from i386
 - Use it to provide better copy_*_user/memcpy/memset/clear/copy_page for
   C stepping K8. String instructions are faster now that unrolled loops.
 - Don't try to merge unforced PCI mappings that don't exceed the device's
   DMA mask.
 - Discard .exit.data/.exit.text at runtime like i386
 - Don't use NTI stores for clear_user
 - Convert bitops.h bitmap functions to use unsigned long * pointers instead
   of void *
 - Fix some warnings in kernel headers.
 - Fix PDA comments