tree f814ac2bbd56245fc6f0b0d420afdd67ebe097bc
parent 26071cedc519b822f69cc42dba9be969d2cdeb19
author Mike Rapoport <rppt@linux.vnet.ibm.com> 1487807017 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1487810488 -0800

userfaultfd: shmem: add userfaultfd hook for shared memory faults

When processing a page fault in shared memory area for not present page,
check the VMA determine if faults are to be handled by userfaultfd.  If
so, delegate the page fault to handle_userfault.

Link: http://lkml.kernel.org/r/20161216144821.5183-33-aarcange@redhat.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Michael Rapoport <RAPOPORT@il.ibm.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>