diff options
| author | Mike Rapoport <rppt@linux.vnet.ibm.com> | 2017-11-16 02:36:56 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-16 03:21:05 +0100 |
| commit | 00bb31fa44acf9591018810ff9d5ab375779c1cc (patch) | |
| tree | 2c66edaefa2b2eab70cb7c440c55b547e36749ff /fs/userfaultfd.c | |
| parent | mm/page_alloc: make sure __rmqueue() etc are always inline (diff) | |
| download | linux-00bb31fa44acf9591018810ff9d5ab375779c1cc.tar.xz linux-00bb31fa44acf9591018810ff9d5ab375779c1cc.zip | |
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.com
Signed-off-by: Mike 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
| -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; |