[PATCHSET v3 0/4] pagemap: make useable for non-privilege users

[Konstantin Khlebnikov <koct9i@gmail.com>]

This patchset makes pagemap useable again in the safe way. It adds bit
'map-exlusive' which is set if page is mapped only here and restores
access for non-privileged users but hides pfn from them.

Last patch removes page-shift bits and completes migration to the new
pagemap format: flags soft-dirty and mmap-exlusive are available only
in the new format.

v3: check permissions in ->open

---

Konstantin Khlebnikov (4):
      pagemap: check permissions and capabilities at open time
      pagemap: add mmap-exclusive bit for marking pages mapped only here
      pagemap: hide physical addresses from non-privileged users
      pagemap: switch to the new format and do some cleanup


 Documentation/vm/pagemap.txt |    3 -
 fs/proc/task_mmu.c           |  219 +++++++++++++++++++-----------------------
 tools/vm/page-types.c        |   35 +++----
 3 files changed, 118 insertions(+), 139 deletions(-)

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