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| author | Mike Rapoport <rppt@linux.vnet.ibm.com> | 2017-02-23 02:43:28 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-23 03:41:28 +0300 |
| commit | b0506e488da5cf2f07f3a4f6d7acaa8f459ad714 (patch) | |
| tree | cad7fd2c8c6e3a5d762824925bc6e468dc02ccb6 /crypto/algapi.c | |
| parent | 4c27fe4c4c84f3afd504ecff2420cc1ad420d38e (diff) | |
| download | linux-b0506e488da5cf2f07f3a4f6d7acaa8f459ad714.tar.xz | |
userfaultfd: shmem: introduce vma_is_shmem
Currently userfault relies on vma_is_anonymous and vma_is_hugetlb to
ensure compatibility of a VMA with userfault. Introduction of
vma_is_shmem allows detection if tmpfs backed VMAs, so that they may be
used with userfaultfd. Current implementation presumes usage of
vma_is_shmem only by slow path routines in userfaultfd, therefore the
vma_is_shmem is not made inline to leave the few remaining free bits in
vm_flags.
Link: http://lkml.kernel.org/r/20161216144821.5183-30-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>
Diffstat (limited to 'crypto/algapi.c')
0 files changed, 0 insertions, 0 deletions