VisionFive2 Linux kernel

author: Mike Rapoport <rppt@linux.vnet.ibm.com> 2017-11-15 17:36:56 -0800 committer: Linus Torvalds <torvalds@linux-foundation.org> 2017-11-15 18:21:05 -0800 commit: 00bb31fa44acf9591018810ff9d5ab375779c1cc parent: 85ccc8fa81af74c3c9133cf243fb75f65d02a59a

Commit Summary:

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

Diffstat:

1 file changed, 1 insertion, 1 deletion

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;