sparc: Match sparc32's build_tree() up to sparc64's

Sparc64 uses a non-recursive sibling traversal algorithm
that never got propagated into the sparc32 copy of this
code.

Sync them up.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 5 deletions

diff --git a/arch/sparc/kernel/prom_32.c b/arch/sparc/kernel/prom_32.c
index 5881c1438198..35cb4c742524 100644
--- a/arch/sparc/kernel/prom_32.c
+++ b/arch/sparc/kernel/prom_32.c
@@ -198,23 +198,33 @@ static char * __init build_full_name(struct device_node *dp)
 
 static struct device_node * __init build_tree(struct device_node *parent, phandle node, struct device_node ***nextp)
 {
+        struct device_node *ret = NULL, *prev_sibling = NULL;
         struct device_node *dp;
 
-        dp = create_node(node, parent);
-        if (dp) {
+        while (1) {
+                dp = create_node(node, parent);
+                if (!dp)
+                        break;
+
+                if (prev_sibling)
+                        prev_sibling->sibling = dp;
+
+                if (!ret)
+                        ret = dp;
+                prev_sibling = dp;
+
                 *(*nextp) = dp;
                 *nextp = &dp->allnext;
 
-                dp->parent = parent;
                 dp->path_component_name = build_path_component(dp);
                 dp->full_name = build_full_name(dp);
 
                 dp->child = build_tree(dp, prom_getchild(node), nextp);
 
-                dp->sibling = build_tree(parent, prom_getsibling(node), nextp);
+                node = prom_getsibling(node);
         }
 
-        return dp;
+        return ret;
 }
 
 struct device_node *of_console_device;