Commit 00bb31fa authored by Mike Rapoport's avatar Mike Rapoport Committed by Linus Torvalds

userfaultfd: use mmgrab instead of open-coded increment of mm_count

Link: http://lkml.kernel.org/r/1508132478-7738-1-git-send-email-rppt@linux.vnet.ibm.comSigned-off-by: default avatarMike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 85ccc8fa
...@@ -668,7 +668,7 @@ int dup_userfaultfd(struct vm_area_struct *vma, struct list_head *fcs) ...@@ -668,7 +668,7 @@ int dup_userfaultfd(struct vm_area_struct *vma, struct list_head *fcs)
ctx->features = octx->features; ctx->features = octx->features;
ctx->released = false; ctx->released = false;
ctx->mm = vma->vm_mm; ctx->mm = vma->vm_mm;
atomic_inc(&ctx->mm->mm_count); mmgrab(ctx->mm);
userfaultfd_ctx_get(octx); userfaultfd_ctx_get(octx);
fctx->orig = octx; fctx->orig = octx;
......
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