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authorMike Rapoport <rppt@linux.vnet.ibm.com>2017-02-23 02:42:30 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-23 03:41:28 +0300
commitd3aadc8ed4cb447981ecf34f9af71cddc6cf907d (patch)
tree1833efa2cd4ec49c81e3a35ca3e046c48c1a549f /fs
parent893e26e61d04eac974ded0c11e1647b335c8cb7b (diff)
downloadlinux-d3aadc8ed4cb447981ecf34f9af71cddc6cf907d.tar.xz
userfaultfd: non-cooperative: dup_userfaultfd: use mm_count instead of mm_users
Since commit d2005e3f41d4 ("userfaultfd: don't pin the user memory in userfaultfd_file_create()") userfaultfd uses mm_count rather than mm_users to pin mm_struct. Make dup_userfaultfd consistent with this behaviour Link: http://lkml.kernel.org/r/20161216144821.5183-11-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 'fs')
-rw-r--r--fs/userfaultfd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index 6046e0b552b2..27978f249016 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -558,7 +558,7 @@ int dup_userfaultfd(struct vm_area_struct *vma, struct list_head *fcs)
ctx->features = octx->features;
ctx->released = false;
ctx->mm = vma->vm_mm;
- atomic_inc(&ctx->mm->mm_users);
+ atomic_inc(&ctx->mm->mm_count);
userfaultfd_ctx_get(octx);
fctx->orig = octx;