of/sparc: move is_root_node() to of.h

Rename is_root_node() to of_node_is_root() and make it available for
all archs to use, as it's not PROM-specific.
Signed-off-by: Andres Salomon <dilinger@queued.net>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

arch/sparc/kernel/prom.h

@@ -9,14 +9,6 @@ extern void irq_trans_init(struct device_node *dp);
 
 extern unsigned int prom_unique_id;
 
-static inline int is_root_node(const struct device_node *dp)
-{
-	if (!dp)
-		return 0;
-
-	return (dp->parent == NULL);
-}
-
 extern char *build_path_component(struct device_node *dp);
 extern void of_console_init(void);
 

arch/sparc/kernel/prom_64.c

@@ -21,7 +21,7 @@
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/lmb.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 
 #include <asm/prom.h>
 #include <asm/oplib.h>
@@ -81,7 +81,7 @@ static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
 		return;
 
 	regs = rprop->value;
-	if (!is_root_node(dp->parent)) {
+	if (!of_node_is_root(dp->parent)) {
 		sprintf(tmp_buf, "%s@%x,%x",
 			dp->name,
 			(unsigned int) (regs->phys_addr >> 32UL),
@@ -121,7 +121,7 @@ static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
 		return;
 
 	regs = prop->value;
-	if (!is_root_node(dp->parent)) {
+	if (!of_node_is_root(dp->parent)) {
 		sprintf(tmp_buf, "%s@%x,%x",
 			dp->name,
 			(unsigned int) (regs->phys_addr >> 32UL),

arch/sparc/kernel/prom_common.c

@@ -244,7 +244,7 @@ char * __init build_full_name(struct device_node *dp)
 
 	n = prom_early_alloc(len);
 	strcpy(n, dp->parent->full_name);
-	if (!is_root_node(dp->parent)) {
+	if (!of_node_is_root(dp->parent)) {
 		strcpy(n + plen, "/");
 		plen++;
 	}

include/linux/of.h

@@ -70,6 +70,11 @@ extern struct device_node *allnodes;
 extern struct device_node *of_chosen;
 extern rwlock_t devtree_lock;
 
+static inline bool of_node_is_root(const struct device_node *node)
+{
+	return node && (node->parent == NULL);
+}
+
 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
 {
 	return test_bit(flag, &n->_flags);