of: merge of_node_get(), of_node_put() and of_find_all_nodes()

Merge common code between Sparc, PowerPC and Microblaze.

Sparc differs in the implementation at this point, so this patch uses
a #ifdef to handle sparc differently for now.  The merging of
implementations will occur in a later patch

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Michal Simek <monstr@monstr.eu>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>

arch/microblaze/include/asm/prom.h

@@ -40,10 +40,6 @@ extern struct device_node *of_chosen;
 extern struct device_node *allnodes;	/* temporary while merging */
 extern rwlock_t devtree_lock;	/* temporary while merging */
 
-extern struct device_node *of_find_all_nodes(struct device_node *prev);
-extern struct device_node *of_node_get(struct device_node *node);
-extern void of_node_put(struct device_node *node);
-
 /* For scanning the flat device-tree at boot time */
 extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
 					const char *uname, int depth,

arch/powerpc/include/asm/prom.h

@@ -34,10 +34,6 @@ extern struct device_node *of_chosen;
 
 #define HAVE_ARCH_DEVTREE_FIXUPS
 
-extern struct device_node *of_find_all_nodes(struct device_node *prev);
-extern struct device_node *of_node_get(struct device_node *node);
-extern void of_node_put(struct device_node *node);
-
 /* For scanning the flat device-tree at boot time */
 extern int __init of_scan_flat_dt(int (*it)(unsigned long node,
 					    const char *uname, int depth,

arch/sparc/include/asm/prom.h

@@ -51,15 +51,6 @@ extern void prom_build_devicetree(void);
 extern void of_populate_present_mask(void);
 extern void of_fill_in_cpu_data(void);
 
-/* Dummy ref counting routines - to be implemented later */
-static inline struct device_node *of_node_get(struct device_node *node)
-{
-	return node;
-}
-static inline void of_node_put(struct device_node *node)
-{
-}
-
 /* These routines are here to provide compatibility with how powerpc
  * handles IRQ mapping for OF device nodes.  We precompute and permanently
  * register them in the of_device objects, whereas powerpc computes them

include/linux/of.h

@@ -79,6 +79,22 @@ set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
 	dn->pde = de;
 }
 
+#if defined(CONFIG_SPARC)
+/* Dummy ref counting routines - to be implemented later */
+static inline struct device_node *of_node_get(struct device_node *node)
+{
+	return node;
+}
+static inline void of_node_put(struct device_node *node)
+{
+}
+
+#else
+extern struct device_node *of_find_all_nodes(struct device_node *prev);
+extern struct device_node *of_node_get(struct device_node *node);
+extern void of_node_put(struct device_node *node);
+#endif
+
 /*
  * OF address retreival & translation
  */