ceph: use rbtree for snap_realms

Switch from radix tree to rbtree for snap realms.  This is much more
appropriate given that realm keys are few and far between.

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 1 insertions, 2 deletions

diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index 98f09cd06006..9d6b90173879 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -5,7 +5,6 @@
 #include <linux/kref.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
-#include <linux/radix-tree.h>
 #include <linux/rbtree.h>
 #include <linux/spinlock.h>
 
@@ -246,7 +245,7 @@ struct ceph_mds_client {
          * should be destroyed.
          */
         struct rw_semaphore     snap_rwsem;
-        struct radix_tree_root  snap_realms;
+        struct rb_root          snap_realms;
         struct list_head        snap_empty;
         spinlock_t              snap_empty_lock;  /* protect snap_empty */