userfaultfd: teach vma_merge to merge across vma->vm_userfaultfd_ctx

[cascardo/linux.git] / mm / madvise.c

diff --git a/mm/madvise.c b/mm/madvise.c
index 64bb8a2..9113579 100644 (file)
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -103,7 +103,8 @@ static long madvise_behavior(struct vm_area_struct *vma,
 
        pgoff = vma->vm_pgoff + ((start - vma->vm_start) >> PAGE_SHIFT);
        *prev = vma_merge(mm, *prev, start, end, new_flags, vma->anon_vma,
-                               vma->vm_file, pgoff, vma_policy(vma));
+                         vma->vm_file, pgoff, vma_policy(vma),
+                         vma->vm_userfaultfd_ctx);
        if (*prev) {
                vma = *prev;
                goto success;