Fix compile problem:

  CC      arch/x86/kernel/early_printk.o
In file included from /home/jeremy/hg/xen/paravirt/linux/arch/x86/kernel/early_printk.c:17:
/home/jeremy/hg/xen/paravirt/linux/arch/x86/include/asm/pgtable.h: In function 'pmd_page':
/home/jeremy/hg/xen/paravirt/linux/arch/x86/include/asm/pgtable.h:516: error: implicit declaration of function '__pfn_to_section'
/home/jeremy/hg/xen/paravirt/linux/arch/x86/include/asm/pgtable.h:516: warning: initialization makes pointer from integer without a cast
/home/jeremy/hg/xen/paravirt/linux/arch/x86/include/asm/pgtable.h:516: error: implicit declaration of function '__section_mem_map_addr'
/home/jeremy/hg/xen/paravirt/linux/arch/x86/include/asm/pgtable.h:516: warning: return makes pointer from integer without a cast
/home/jeremy/hg/xen/paravirt/linux/arch/x86/include/asm/pgtable.h: In function 'pud_page':
/home/jeremy/hg/xen/paravirt/linux/arch/x86/include/asm/pgtable.h:586: warning: initialization makes pointer from integer without a cast
/home/jeremy/hg/xen/paravirt/linux/arch/x86/include/asm/pgtable.h:586: warning: return makes pointer from integer without a cast
/home/jeremy/hg/xen/paravirt/linux/arch/x86/include/asm/pgtable.h: In function 'pgd_page':
/home/jeremy/hg/xen/paravirt/linux/arch/x86/include/asm/pgtable.h:625: warning: initialization makes pointer from integer without a cast
/home/jeremy/hg/xen/paravirt/linux/arch/x86/include/asm/pgtable.h:625: warning: return makes pointer from integer without a cast

This is a cycling dependency between asm/pgtable.h and linux/mmzone.h
when using CONFIG_SPARSEMEM.  Rather than hacking up the headers some
more, remove asm/pgtable.h, since early_printk.c doesn't actually need
it.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: unify identical code

asm/io_32.h and _64.h have identical prototypes for the ioremap family
of functions.  The 32-bit header had a more descriptive comment.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: unify identical code

asm/io_32.h and _64.h has functionally identical definitions for
virt_to_phys, phys_to_virt, page_to_phys, and the isa_* variants, so
just unify them.

The only slightly functional change is using phys_addr_t for the
physical address argument and return val.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

The _none test is done differently for every level of the pagetable.
Standardize them by:

 1: Use the native_X_val to extract the raw entry, with no need to go
    via paravirt_ops, diff -r 1d0646d0d319 arch/x86/include/asm/pgtable.h, and
 2: Compare with 0 rather than using a boolean !, since they are actually values
    and not booleans.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Add pgd/pud/pmd_flags which are analogous to pte_flags, and use them
where-ever we only care about testing the flags portions of the
respective entries.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify io_remap_pfn_range.  Don't demacro yet.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pgd_none.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pud_none.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pages_to_mb.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pmd_bad.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pgd_bad.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pgd_bad.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pud_large.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pte_offset_kernel.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pte_index.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify pmd_pfn.  Unfortunately it can't be demacroed because it has a
cyclic dependency on linux/mm.h:page_to_nid().
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pmd_pfn.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

It's already defined in pgtable.h
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pmd_offset.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pmd_index.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pmd_page.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pmd_page_vaddr.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pud_offset.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pud_index.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pgd_page.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pud_page.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

We'll need the definitions sooner.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pud_page_vaddr.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pgd_page_vaddr.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pmd_none.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pmd_present.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pgd_present.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pud_present.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pte_present.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pte_same.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Impact: cleanup

Unify and demacro pte_none.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Merge branch 'header-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'header-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (90 commits)
  headers_check fix: x86, swab.h
  headers_check fix: x86, sigcontext32.h
  headers_check fix: x86, sigcontext.h
  headers_check fix: x86, ptrace-abi.h
  headers_check fix: x86, mtrr.h
  headers_check fix: x86, mce.h
  headers_check fix: x86, kvm.h
  headers_check fix: x86, e820.h
  headers_check fix: linux/rtnetlink.h
  headers_check fix: linux/nubus.h
  headers_check fix: video/uvesafb.h
  headers_check fix: video/sisfb.h
  headers_check fix: sound/hdsp.h
  headers_check fix: mtd/inftl-user.h
  headers_check fix: linux/virtio_net.h
  headers_check fix: linux/virtio_console.h
  headers_check fix: linux/virtio_blk.h
  headers_check fix: linux/videodev.h
  headers_check fix: linux/video_encoder.h
  headers_check fix: linux/video_decoder.h
  ...

Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  generic-ipi: use per cpu data for single cpu ipi calls
  cpumask: convert lib/smp_processor_id to new cpumask ops
  signals, debug: fix BUG: using smp_processor_id() in preemptible code in print_fatal_signal()

Merge branch 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  irq: export __set_irq_handler() and handle_level_irq()

Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  hrtimer: prevent negative expiry value after clock_was_set()
  hrtimers: allow the hot-unplugging of all cpus
  hrtimers: increase clock min delta threshold while interrupt hanging