NFSv4: Kill unused nfs_inode->delegation_state field

Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>

fs/nfs/delegation.c

@@ -175,7 +175,6 @@ void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred,
 			delegation->cred = get_rpccred(cred);
 			clear_bit(NFS_DELEGATION_NEED_RECLAIM,
 				  &delegation->flags);
-			NFS_I(inode)->delegation_state = delegation->type;
 			spin_unlock(&delegation->lock);
 			put_rpccred(oldcred);
 			rcu_read_unlock();
@@ -270,7 +269,6 @@ nfs_detach_delegation_locked(struct nfs_inode *nfsi,
 	set_bit(NFS_DELEGATION_RETURNING, &delegation->flags);
 	list_del_rcu(&delegation->super_list);
 	delegation->inode = NULL;
-	nfsi->delegation_state = 0;
 	rcu_assign_pointer(nfsi->delegation, NULL);
 	spin_unlock(&delegation->lock);
 	return delegation;
@@ -350,7 +348,6 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
 					&delegation->stateid)) {
 			nfs_update_inplace_delegation(old_delegation,
 					delegation);
-			nfsi->delegation_state = old_delegation->type;
 			goto out;
 		}
 		/*
@@ -374,7 +371,6 @@ int nfs_inode_set_delegation(struct inode *inode, struct rpc_cred *cred, struct
 			goto out;
 	}
 	list_add_rcu(&delegation->super_list, &server->delegations);
-	nfsi->delegation_state = delegation->type;
 	rcu_assign_pointer(nfsi->delegation, delegation);
 	delegation = NULL;
 

fs/nfs/inode.c

@@ -1776,7 +1776,6 @@ static inline void nfs4_init_once(struct nfs_inode *nfsi)
 #if IS_ENABLED(CONFIG_NFS_V4)
 	INIT_LIST_HEAD(&nfsi->open_states);
 	nfsi->delegation = NULL;
-	nfsi->delegation_state = 0;
 	init_rwsem(&nfsi->rwsem);
 	nfsi->layout = NULL;
 #endif

include/linux/nfs_fs.h

@@ -180,7 +180,6 @@ struct nfs_inode {
         /* NFSv4 state */
 	struct list_head	open_states;
 	struct nfs_delegation __rcu *delegation;
-	fmode_t			 delegation_state;
 	struct rw_semaphore	rwsem;
 
 	/* pNFS layout information */