tree 6b328205937da8bd5d7682975695665f40bef892
parent 356515e7b64c2629f686109d426baaf868cdf7e8
author Konstantin Khlebnikov <khlebnikov@yandex-team.ru> 1441749607 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1441751728 -0700

pagemap: hide physical addresses from non-privileged users

This patch makes pagemap readable for normal users and hides physical
addresses from them.  For some use-cases PFN isn't required at all.

See http://lkml.kernel.org/r/1425935472-17949-1-git-send-email-kirill@shutemov.name

Fixes: ab676b7d6fbf ("pagemap: do not leak physical addresses to non-privileged userspace")
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Mark Williamson <mwilliamson@undo-software.com>
Tested-by:  Mark Williamson <mwilliamson@undo-software.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>