The patch titled
Subject: userfaultfd: use mmgrab instead of open-coded increment of mm_count
has been added to the -mm tree. Its filename is
userfaultfd-use-mmgrab-instead-of-open-coded-increment-of-mm_count.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/userfaultfd-use-mmgrab-instead-of-open-coded-increment-of-mm_count.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/userfaultfd-use-mmgrab-instead-of-open-coded-increment-of-mm_count.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Subject: userfaultfd: use mmgrab instead of open-coded increment of mm_count
Link: http://lkml.kernel.org/r/1508132478-7738-1-git-send-email-rppt@xxxxxxxxxxxxxxxxxx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: "Dr . David Alan Gilbert" <dgilbert@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/userfaultfd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/userfaultfd.c~userfaultfd-use-mmgrab-instead-of-open-coded-increment-of-mm_count fs/userfaultfd.c
--- a/fs/userfaultfd.c~userfaultfd-use-mmgrab-instead-of-open-coded-increment-of-mm_count
+++ a/fs/userfaultfd.c
@@ -668,7 +668,7 @@ int dup_userfaultfd(struct vm_area_struc
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;
_
Patches currently in -mm which might be from rppt@xxxxxxxxxxxxxxxxxx are
userfaultfd-use-mmgrab-instead-of-open-coded-increment-of-mm_count.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
