[PATCH] powerpc: Wire up /proc/vmallocinfo to our ioremap()

This adds the necessary bits and pieces to powerpc implementation of
ioremap to benefit from caller tracking in /proc/vmallocinfo, at least
for ioremap's done after mem init as the older ones aren't tracked.

Signed-off-by: Benjamin Herrenschmidt <benh <at> kernel.crashing.org>
---

 
 arch/powerpc/include/asm/io.h                |    6 ++++++
 arch/powerpc/include/asm/machdep.h           |    2 +-
 arch/powerpc/mm/pgtable_32.c                 |   14 +++++++++++---
 arch/powerpc/mm/pgtable_64.c                 |   25 +++++++++++++++++--------
 arch/powerpc/platforms/cell/io-workarounds.c |    4 ++--
 arch/powerpc/platforms/iseries/setup.c       |    2 +-
 6 files changed, 38 insertions(+), 15 deletions(-)

--- linux-work.orig/arch/powerpc/include/asm/io.h	2009-02-04 15:37:43.000000000 +1100
+++ linux-work/arch/powerpc/include/asm/io.h	2009-02-04 15:38:30.000000000 +1100
 <at>  <at>  -632,6 +632,9  <at>  <at>  static inline void iosync(void)
  *   ioremap_flags and cannot be hooked (but can be used by a hook on one
  *   of the previous ones)
  *
+ * * __ioremap_caller is the same as above but takes an explicit caller
+ *   reference rather than using __builtin_return_address(0)
+ *
  * * __iounmap, is the low level implementation used by iounmap and cannot
  *   be hooked (but can be used by a hook on iounmap)
  *
 <at>  <at>  -646,6 +649,9  <at>  <at>  extern void iounmap(volatile void __iome