From d3aadc8ed4cb447981ecf34f9af71cddc6cf907d Mon Sep 17 00:00:00 2001 From: Mike Rapoport Date: Wed, 22 Feb 2017 15:42:30 -0800 Subject: [PATCH] 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 Signed-off-by: Andrea Arcangeli Cc: "Dr. David Alan Gilbert" Cc: Hillf Danton Cc: Michael Rapoport Cc: Mike Kravetz Cc: Pavel Emelyanov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/userfaultfd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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; -- 2.20.1