ceph: replace list_entry with container_of

Usage of non-list.h list_entry function for container_of
functionality replaced with direct use of container_of.

Signed-off-by: Noah Watkins <noah@noahdesu.com>
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index a3d4943..05947b9 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -364,7 +364,7 @@
 
 static inline struct ceph_inode_info *ceph_inode(struct inode *inode)
 {
-	return list_entry(inode, struct ceph_inode_info, vfs_inode);
+	return container_of(inode, struct ceph_inode_info, vfs_inode);
 }
 
 static inline void ceph_i_clear(struct inode *inode, unsigned mask)