1 files changed, 24 insertions, 0 deletions

diff --git a/mm/util.c b/mm/util.c
index e7b103a6fd21..88ea1bd661c0 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -6,6 +6,8 @@
 #include <linux/sched.h>
 #include <asm/uaccess.h>
 
+#include "internal.h"
+
 #define CREATE_TRACE_POINTS
 #include <trace/events/kmem.h>
 
@@ -215,6 +217,28 @@ char *strndup_user(const char __user *s, long n)
 }
 EXPORT_SYMBOL(strndup_user);
 
+void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
+                struct vm_area_struct *prev, struct rb_node *rb_parent)
+{
+        struct vm_area_struct *next;
+
+        vma->vm_prev = prev;
+        if (prev) {
+                next = prev->vm_next;
+                prev->vm_next = vma;
+        } else {
+                mm->mmap = vma;
+                if (rb_parent)
+                        next = rb_entry(rb_parent,
+                                        struct vm_area_struct, vm_rb);
+                else
+                        next = NULL;
+        }
+        vma->vm_next = next;
+        if (next)
+                next->vm_prev = vma;
+}
+
 #if defined(CONFIG_MMU) && !defined(HAVE_ARCH_PICK_MMAP_LAYOUT)
 void arch_pick_mmap_layout(struct mm_struct *mm)
 {