[JFFS2] Use rb_first() and rb_last() cleanup

Use rb_first() and rb_last() to implement frag_first() and frag_last().

Signed-off-by: Akinbou Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 4 insertions, 6 deletions

diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h
index 0ddfd70307..4178b4b559 100644
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -294,23 +294,21 @@ static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev)
 
 static inline struct jffs2_node_frag *frag_first(struct rb_root *root)
 {
-        struct rb_node *node = root->rb_node;
+        struct rb_node *node = rb_first(root);
 
         if (!node)
                 return NULL;
-        while(node->rb_left)
-                node = node->rb_left;
+
         return rb_entry(node, struct jffs2_node_frag, rb);
 }
 
 static inline struct jffs2_node_frag *frag_last(struct rb_root *root)
 {
-        struct rb_node *node = root->rb_node;
+        struct rb_node *node = rb_last(root);
 
         if (!node)
                 return NULL;
-        while(node->rb_right)
-                node = node->rb_right;
+
         return rb_entry(node, struct jffs2_node_frag, rb);
 }