diff options
| author | Mike Rapoport <[email protected]> | 2017-11-15 17:36:56 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2017-11-15 18:21:05 -0800 |
| commit | 00bb31fa44acf9591018810ff9d5ab375779c1cc (patch) | |
| tree | 2c66edaefa2b2eab70cb7c440c55b547e36749ff | |
| parent | 85ccc8fa81af74c3c9133cf243fb75f65d02a59a (diff) | |
userfaultfd: use mmgrab instead of open-coded increment of mm_count
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Mike Rapoport <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: "Dr . David Alan Gilbert" <[email protected]>
Cc: Mike Kravetz <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | fs/userfaultfd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c index f46d133c0949..ac9a4e65ca49 100644 --- a/fs/userfaultfd.c +++ b/fs/userfaultfd.c @@ -668,7 +668,7 @@ 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_count); + mmgrab(ctx->mm); userfaultfd_ctx_get(octx); fctx->orig = octx; |