--- zzzz-none-000/linux-4.19.183/mm/vmalloc.c	2021-03-24 10:07:39.000000000 +0000
+++ bcm63-7530ax-756/linux-4.19.183/mm/vmalloc.c	2023-06-28 08:54:21.000000000 +0000
@@ -2775,4 +2775,62 @@
 module_init(proc_vmalloc_init);
 
 #endif
+#if defined(CONFIG_AVM_ENHANCED)
+/**
+ */
+static struct vmap_area *__is_addr_in_vmap_area(unsigned long addr) {
+	struct rb_node *n = vmap_area_root.rb_node;
+
+	while (n) {
+		struct vmap_area *va;
+		if(!virt_addr_valid(n)) {
+			return NULL;
+		}
+		va = rb_entry(n, struct vmap_area, rb_node);
+		if(!virt_addr_valid(va)) {
+			return NULL;
+		}
+		if((addr >= va->va_start) && (addr < va->va_end)) {
+			return va;
+		}
+		if (addr < va->va_start)
+			n = n->rb_left;
+		else if (addr > va->va_start)
+			n = n->rb_right;
+	}
+	return NULL;
+}
+/**
+ * get vmalloc-area-infos if addr in range 
+ * @return va_start (zero if not exist)
+ */
+unsigned long get_vmap_area(unsigned long addr, 
+							   unsigned long *caller,
+							   unsigned long *size, 
+							   unsigned long *vm_flags 
+							   ) {
+	unsigned long flags;
+	unsigned long _size = 0, _caller = 0, _va_start = 0, _vm_flags = 0;
+	struct vmap_area *va;
+
+	if(!spin_trylock_irqsave(&vmap_area_lock, flags)) {
+		return 0;
+	}
+	va = __is_addr_in_vmap_area(addr);
+	if(va && (va->flags & VM_VM_AREA)) {
+		if(virt_addr_valid(va->vm)) {
+			_caller	  = (unsigned long)va->vm->caller;
+			_vm_flags = va->vm->flags;
+		}
+		_va_start = va->va_start;
+		_size	  = va->va_end - va->va_start;
+	}
+	spin_unlock_irqrestore(&vmap_area_lock, flags);
+
+	if(caller)	   *caller  = _caller;
+	if(size)	   *size     = _size;
+	if(vm_flags)   *vm_flags = _vm_flags;
+	return _va_start;
+}
+#endif /*--- #if defined(CONFIG_AVM_ENHANCED) ---*/