X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=mm%2Futil.c;h=88ea1bd661c0f5164e37a8415050808fa815808f;hb=df80442d1ee2902c2e39f90f18160f2e08d14c06;hp=e7b103a6fd21c50857eda25cb5750e6d319e6498;hpb=751516f0a9bad32544f40f471037c0e45fb639c9;p=firefly-linux-kernel-4.4.55.git

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)
 {