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-rw-r--r--mm/util.c24
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)
{