[PATCH 17/19] xen/dt: ifdef out DEV_DT-related bits from device_tree.{c,h}

[Alejandro Vallejo <agarciav@xxxxxxx>]

... which means, device-tree.c stops requiring strictly CONFIG_HAS_DEVICE_TREE
and may function without it.

Not a functional change on architectures that currently use these files,
as they already select CONFIG_HAS_DEVICE_TREE.

Signed-off-by: Alejandro Vallejo <agarciav@xxxxxxx>
---
 xen/common/device-tree/device-tree.c | 2 ++
 xen/include/xen/device_tree.h        | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/xen/common/device-tree/device-tree.c 
b/xen/common/device-tree/device-tree.c
index 886e6c7712..c8a9c0e46a 100644
--- a/xen/common/device-tree/device-tree.c
+++ b/xen/common/device-tree/device-tree.c
@@ -2028,9 +2028,11 @@ static unsigned long unflatten_dt_node(const void *fdt,
             ((char *)pp->value)[sz - 1] = 0;
             dt_dprintk("fixed up name for %s -> %s\n", pathp,
                        (char *)pp->value);
+#ifdef CONFIG_HAS_DEVICE_TREE
             /* Generic device initialization */
             np->dev.type = DEV_DT;
             np->dev.of_node = np;
+#endif /* CONFIG_HAS_DEVICE_TREE */
         }
     }
     if ( allnextpp )
diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h
index 7d1c8bc305..641f24518d 100644
--- a/xen/include/xen/device_tree.h
+++ b/xen/include/xen/device_tree.h
@@ -109,9 +109,12 @@ struct dt_device_node {
      */
     struct list_head domain_list;
 
+#ifdef CONFIG_HAS_DEVICE_TREE
     struct device dev;
+#endif /* CONFIG_HAS_DEVICE_TREE */
 };
 
+#ifdef CONFIG_HAS_DEVICE_TREE
 #define dt_to_dev(dt_node)  (&(dt_node)->dev)
 
 static inline struct dt_device_node *dev_to_dt(struct device *dev)
@@ -120,6 +123,7 @@ static inline struct dt_device_node *dev_to_dt(struct 
device *dev)
 
     return container_of(dev, struct dt_device_node, dev);
 }
+#endif /* CONFIG_HAS_DEVICE_TREE */
 
 #define MAX_PHANDLE_ARGS 16
 struct dt_phandle_args {
-- 
2.43.0