userfaultfd: report UFFDIO_ZEROPAGE as available for shmem VMAs
authorMike Rapoport <rppt@linux.vnet.ibm.com>
Wed, 6 Sep 2017 23:23:12 +0000 (16:23 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 7 Sep 2017 00:27:28 +0000 (17:27 -0700)
commitce53e8e6f2cb02d69f0a1d7954e10d3231bc75f5
treecffa940f27e189853b3afd76c49f977eb30d6a93
parent8fb44e5403ca86e33411dfa12dd298ed5ab1c3f7
userfaultfd: report UFFDIO_ZEROPAGE as available for shmem VMAs

Now when shmem VMAs can be filled with zero page via userfaultfd we can
report that UFFDIO_ZEROPAGE is available for those VMAs

Link: http://lkml.kernel.org/r/1497939652-16528-7-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/userfaultfd.c