ceph: use ->free_inode()

a lot of non-delayed work in this case; all of that is left in
->destroy_inode()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/ceph/inode.c

@@ -519,9 +519,8 @@ struct inode *ceph_alloc_inode(struct super_block *sb)
 	return &ci->vfs_inode;
 }
 
-static void ceph_i_callback(struct rcu_head *head)
+void ceph_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	struct ceph_inode_info *ci = ceph_inode(inode);
 
 	kfree(ci->i_symlink);
@@ -581,8 +580,6 @@ void ceph_destroy_inode(struct inode *inode)
 		ceph_buffer_put(ci->i_xattrs.prealloc_blob);
 
 	ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
-
-	call_rcu(&inode->i_rcu, ceph_i_callback);
 }
 
 int ceph_drop_inode(struct inode *inode)

fs/ceph/super.c

@@ -848,6 +848,7 @@ static void ceph_umount_begin(struct super_block *sb)
 static const struct super_operations ceph_super_ops = {
 	.alloc_inode	= ceph_alloc_inode,
 	.destroy_inode	= ceph_destroy_inode,
+	.free_inode	= ceph_free_inode,
 	.write_inode    = ceph_write_inode,
 	.drop_inode	= ceph_drop_inode,
 	.sync_fs        = ceph_sync_fs,

fs/ceph/super.h

@@ -874,6 +874,7 @@ extern const struct inode_operations ceph_file_iops;
 
 extern struct inode *ceph_alloc_inode(struct super_block *sb);
 extern void ceph_destroy_inode(struct inode *inode);
+extern void ceph_free_inode(struct inode *inode);
 extern int ceph_drop_inode(struct inode *inode);
 
 extern struct inode *ceph_get_inode(struct super_block *sb,