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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