RPC: Clean up RPC task structure

 Shrink the RPC task structure. Instead of storing separate pointers
 for task->tk_exit and task->tk_release, put them in a structure.

 Also pass the user data pointer as a parameter instead of passing it via
 task->tk_calldata. This enables us to nest callbacks.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

7 files changed, 126 insertions, 104 deletions

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 079228817603..a834423942c7 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -269,7 +269,6 @@ static void nfs_direct_read_schedule(struct nfs_direct_req *dreq,
 
 		data->task.tk_cookie = (unsigned long) inode;
 		data->task.tk_calldata = data;
-		data->task.tk_release = nfs_readdata_release;
 		data->complete = nfs_direct_read_result;
 
 		lock_kernel();
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 92c870d19ccd..c172a7584646 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -732,19 +732,23 @@ nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 
 extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int);
 
-static void
-nfs3_read_done(struct rpc_task *task)
+static void nfs3_read_done(struct rpc_task *task, void *calldata)
 {
-	struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
+	struct nfs_read_data *data = calldata;
 
 	if (nfs3_async_handle_jukebox(task))
 		return;
 	/* Call back common NFS readpage processing */
 	if (task->tk_status >= 0)
 		nfs_refresh_inode(data->inode, &data->fattr);
-	nfs_readpage_result(task);
+	nfs_readpage_result(task, calldata);
 }
 
+static const struct rpc_call_ops nfs3_read_ops = {
+	.rpc_call_done = nfs3_read_done,
+	.rpc_release = nfs_readdata_release,
+};
+
 static void
 nfs3_proc_read_setup(struct nfs_read_data *data)
 {
@@ -762,23 +766,26 @@ nfs3_proc_read_setup(struct nfs_read_data *data)
 	flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
 
 	/* Finalize the task. */
-	rpc_init_task(task, NFS_CLIENT(inode), nfs3_read_done, flags);
+	rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs3_read_ops, data);
 	rpc_call_setup(task, &msg, 0);
 }
 
-static void
-nfs3_write_done(struct rpc_task *task)
+static void nfs3_write_done(struct rpc_task *task, void *calldata)
 {
-	struct nfs_write_data *data;
+	struct nfs_write_data *data = calldata;
 
 	if (nfs3_async_handle_jukebox(task))
 		return;
-	data = (struct nfs_write_data *)task->tk_calldata;
 	if (task->tk_status >= 0)
 		nfs_post_op_update_inode(data->inode, data->res.fattr);
-	nfs_writeback_done(task);
+	nfs_writeback_done(task, calldata);
 }
 
+static const struct rpc_call_ops nfs3_write_ops = {
+	.rpc_call_done = nfs3_write_done,
+	.rpc_release = nfs_writedata_release,
+};
+
 static void
 nfs3_proc_write_setup(struct nfs_write_data *data, int how)
 {
@@ -806,23 +813,26 @@ nfs3_proc_write_setup(struct nfs_write_data *data, int how)
 	flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
 
 	/* Finalize the task. */
-	rpc_init_task(task, NFS_CLIENT(inode), nfs3_write_done, flags);
+	rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs3_write_ops, data);
 	rpc_call_setup(task, &msg, 0);
 }
 
-static void
-nfs3_commit_done(struct rpc_task *task)
+static void nfs3_commit_done(struct rpc_task *task, void *calldata)
 {
-	struct nfs_write_data *data;
+	struct nfs_write_data *data = calldata;
 
 	if (nfs3_async_handle_jukebox(task))
 		return;
-	data = (struct nfs_write_data *)task->tk_calldata;
 	if (task->tk_status >= 0)
 		nfs_post_op_update_inode(data->inode, data->res.fattr);
-	nfs_commit_done(task);
+	nfs_commit_done(task, calldata);
 }
 
+static const struct rpc_call_ops nfs3_commit_ops = {
+	.rpc_call_done = nfs3_commit_done,
+	.rpc_release = nfs_commit_release,
+};
+
 static void
 nfs3_proc_commit_setup(struct nfs_write_data *data, int how)
 {
@@ -840,7 +850,7 @@ nfs3_proc_commit_setup(struct nfs_write_data *data, int how)
 	flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
 
 	/* Finalize the task. */
-	rpc_init_task(task, NFS_CLIENT(inode), nfs3_commit_done, flags);
+	rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs3_commit_ops, data);
 	rpc_call_setup(task, &msg, 0);
 }
 
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index f988a9417b13..3d5d3c07d621 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -196,14 +196,12 @@ static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinf
 
 /* Helper for asynchronous RPC calls */
 static int nfs4_call_async(struct rpc_clnt *clnt, rpc_action tk_begin,
-		rpc_action tk_exit, void *calldata)
+		const struct rpc_call_ops *tk_ops, void *calldata)
 {
 	struct rpc_task *task;
 
-	if (!(task = rpc_new_task(clnt, tk_exit, RPC_TASK_ASYNC)))
+	if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
 		return -ENOMEM;
-
-	task->tk_calldata = calldata;
 	task->tk_action = tk_begin;
 	rpc_execute(task);
 	return 0;
@@ -867,10 +865,10 @@ struct nfs4_closedata {
 	struct nfs_fattr fattr;
 };
 
-static void nfs4_free_closedata(struct nfs4_closedata *calldata)
+static void nfs4_free_closedata(void *data)
 {
-	struct nfs4_state *state = calldata->state;
-	struct nfs4_state_owner *sp = state->owner;
+	struct nfs4_closedata *calldata = data;
+	struct nfs4_state_owner *sp = calldata->state->owner;
 
 	nfs4_put_open_state(calldata->state);
 	nfs_free_seqid(calldata->arg.seqid);
@@ -878,9 +876,9 @@ static void nfs4_free_closedata(struct nfs4_closedata *calldata)
 	kfree(calldata);
 }
 
-static void nfs4_close_done(struct rpc_task *task)
+static void nfs4_close_done(struct rpc_task *task, void *data)
 {
-	struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
+	struct nfs4_closedata *calldata = data;
 	struct nfs4_state *state = calldata->state;
 	struct nfs_server *server = NFS_SERVER(calldata->inode);
 
@@ -904,7 +902,6 @@ static void nfs4_close_done(struct rpc_task *task)
 			}
 	}
 	nfs_refresh_inode(calldata->inode, calldata->res.fattr);
-	nfs4_free_closedata(calldata);
 }
 
 static void nfs4_close_begin(struct rpc_task *task)
@@ -918,10 +915,8 @@ static void nfs4_close_begin(struct rpc_task *task)
 		.rpc_cred = state->owner->so_cred,
 	};
 	int mode = 0, old_mode;
-	int status;
 
-	status = nfs_wait_on_sequence(calldata->arg.seqid, task);
-	if (status != 0)
+	if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
 		return;
 	/* Recalculate the new open mode in case someone reopened the file
 	 * while we were waiting in line to be scheduled.
@@ -937,9 +932,8 @@ static void nfs4_close_begin(struct rpc_task *task)
 	spin_unlock(&calldata->inode->i_lock);
 	spin_unlock(&state->owner->so_lock);
 	if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
-		nfs4_free_closedata(calldata);
-		task->tk_exit = NULL;
-		rpc_exit(task, 0);
+		/* Note: exit _without_ calling nfs4_close_done */
+		task->tk_action = NULL;
 		return;
 	}
 	nfs_fattr_init(calldata->res.fattr);
@@ -949,6 +943,11 @@ static void nfs4_close_begin(struct rpc_task *task)
 	rpc_call_setup(task, &msg, 0);
 }
 
+static const struct rpc_call_ops nfs4_close_ops = {
+	.rpc_call_done = nfs4_close_done,
+	.rpc_release = nfs4_free_closedata,
+};
+
 /* 
  * It is possible for data to be read/written from a mem-mapped file 
  * after the sys_close call (which hits the vfs layer as a flush).
@@ -982,7 +981,7 @@ int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
 	calldata->res.server = server;
 
 	status = nfs4_call_async(server->client, nfs4_close_begin,
-			nfs4_close_done, calldata);
+			&nfs4_close_ops, calldata);
 	if (status == 0)
 		goto out;
 
@@ -2125,10 +2124,9 @@ static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 	return err;
 }
 
-static void
-nfs4_read_done(struct rpc_task *task)
+static void nfs4_read_done(struct rpc_task *task, void *calldata)
 {
-	struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
+	struct nfs_read_data *data = calldata;
 	struct inode *inode = data->inode;
 
 	if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
@@ -2138,9 +2136,14 @@ nfs4_read_done(struct rpc_task *task)
 	if (task->tk_status > 0)
 		renew_lease(NFS_SERVER(inode), data->timestamp);
 	/* Call back common NFS readpage processing */
-	nfs_readpage_result(task);
+	nfs_readpage_result(task, calldata);
 }
 
+static const struct rpc_call_ops nfs4_read_ops = {
+	.rpc_call_done = nfs4_read_done,
+	.rpc_release = nfs_readdata_release,
+};
+
 static void
 nfs4_proc_read_setup(struct nfs_read_data *data)
 {
@@ -2160,14 +2163,13 @@ nfs4_proc_read_setup(struct nfs_read_data *data)
 	flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
 
 	/* Finalize the task. */
-	rpc_init_task(task, NFS_CLIENT(inode), nfs4_read_done, flags);
+	rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_read_ops, data);
 	rpc_call_setup(task, &msg, 0);
 }
 
-static void
-nfs4_write_done(struct rpc_task *task)
+static void nfs4_write_done(struct rpc_task *task, void *calldata)
 {
-	struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
+	struct nfs_write_data *data = calldata;
 	struct inode *inode = data->inode;
 	
 	if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
@@ -2179,9 +2181,14 @@ nfs4_write_done(struct rpc_task *task)
 		nfs_post_op_update_inode(inode, data->res.fattr);
 	}
 	/* Call back common NFS writeback processing */
-	nfs_writeback_done(task);
+	nfs_writeback_done(task, calldata);
 }
 
+static const struct rpc_call_ops nfs4_write_ops = {
+	.rpc_call_done = nfs4_write_done,
+	.rpc_release = nfs_writedata_release,
+};
+
 static void
 nfs4_proc_write_setup(struct nfs_write_data *data, int how)
 {
@@ -2214,14 +2221,13 @@ nfs4_proc_write_setup(struct nfs_write_data *data, int how)
 	flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
 
 	/* Finalize the task. */
-	rpc_init_task(task, NFS_CLIENT(inode), nfs4_write_done, flags);
+	rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_write_ops, data);
 	rpc_call_setup(task, &msg, 0);
 }
 
-static void
-nfs4_commit_done(struct rpc_task *task)
+static void nfs4_commit_done(struct rpc_task *task, void *calldata)
 {
-	struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
+	struct nfs_write_data *data = calldata;
 	struct inode *inode = data->inode;
 	
 	if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
@@ -2231,9 +2237,14 @@ nfs4_commit_done(struct rpc_task *task)
 	if (task->tk_status >= 0)
 		nfs_post_op_update_inode(inode, data->res.fattr);
 	/* Call back common NFS writeback processing */
-	nfs_commit_done(task);
+	nfs_commit_done(task, calldata);
 }
 
+static const struct rpc_call_ops nfs4_commit_ops = {
+	.rpc_call_done = nfs4_commit_done,
+	.rpc_release = nfs_commit_release,
+};
+
 static void
 nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
 {
@@ -2255,7 +2266,7 @@ nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
 	flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
 
 	/* Finalize the task. */
-	rpc_init_task(task, NFS_CLIENT(inode), nfs4_commit_done, flags);
+	rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_commit_ops, data);
 	rpc_call_setup(task, &msg, 0);	
 }
 
@@ -2263,11 +2274,10 @@ nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
  * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
  * standalone procedure for queueing an asynchronous RENEW.
  */
-static void
-renew_done(struct rpc_task *task)
+static void nfs4_renew_done(struct rpc_task *task, void *data)
 {
 	struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
-	unsigned long timestamp = (unsigned long)task->tk_calldata;
+	unsigned long timestamp = (unsigned long)data;
 
 	if (task->tk_status < 0) {
 		switch (task->tk_status) {
@@ -2284,6 +2294,10 @@ renew_done(struct rpc_task *task)
 	spin_unlock(&clp->cl_lock);
 }
 
+static const struct rpc_call_ops nfs4_renew_ops = {
+	.rpc_call_done = nfs4_renew_done,
+};
+
 int
 nfs4_proc_async_renew(struct nfs4_client *clp)
 {
@@ -2294,7 +2308,7 @@ nfs4_proc_async_renew(struct nfs4_client *clp)
 	};
 
 	return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
-			renew_done, (void *)jiffies);
+			&nfs4_renew_ops, (void *)jiffies);
 }
 
 int
@@ -2866,15 +2880,16 @@ static void nfs4_locku_release_calldata(struct nfs4_unlockdata *calldata)
 	}
 }
 
-static void nfs4_locku_complete(struct nfs4_unlockdata *calldata)
+static void nfs4_locku_complete(void *data)
 {
+	struct nfs4_unlockdata *calldata = data;
 	complete(&calldata->completion);
 	nfs4_locku_release_calldata(calldata);
 }
 
-static void nfs4_locku_done(struct rpc_task *task)
+static void nfs4_locku_done(struct rpc_task *task, void *data)
 {
-	struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata;
+	struct nfs4_unlockdata *calldata = data;
 
 	nfs_increment_lock_seqid(task->tk_status, calldata->luargs.seqid);
 	switch (task->tk_status) {
@@ -2890,10 +2905,8 @@ static void nfs4_locku_done(struct rpc_task *task)
 		default:
 			if (nfs4_async_handle_error(task, calldata->res.server) == -EAGAIN) {
 				rpc_restart_call(task);
-				return;
 			}
 	}
-	nfs4_locku_complete(calldata);
 }
 
 static void nfs4_locku_begin(struct rpc_task *task)
@@ -2911,14 +2924,18 @@ static void nfs4_locku_begin(struct rpc_task *task)
 	if (status != 0)
 		return;
 	if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
-		nfs4_locku_complete(calldata);
-		task->tk_exit = NULL;
-		rpc_exit(task, 0);
+		/* Note: exit _without_ running nfs4_locku_done */
+		task->tk_action = NULL;
 		return;
 	}
 	rpc_call_setup(task, &msg, 0);
 }
 
+static const struct rpc_call_ops nfs4_locku_ops = {
+	.rpc_call_done = nfs4_locku_done,
+	.rpc_release = nfs4_locku_complete,
+};
+
 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
 {
 	struct nfs4_unlockdata *calldata;
@@ -2963,7 +2980,7 @@ static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *
 	init_completion(&calldata->completion);
 
 	status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_locku_begin,
-			nfs4_locku_done, calldata);
+			&nfs4_locku_ops, calldata);
 	if (status == 0)
 		wait_for_completion_interruptible(&calldata->completion);
 	do_vfs_lock(request->fl_file, request);
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index e1e3ca5d746b..6145e82b45e8 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -547,10 +547,9 @@ nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 
 extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int);
 
-static void
-nfs_read_done(struct rpc_task *task)
+static void nfs_read_done(struct rpc_task *task, void *calldata)
 {
-	struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
+	struct nfs_read_data *data = calldata;
 
 	if (task->tk_status >= 0) {
 		nfs_refresh_inode(data->inode, data->res.fattr);
@@ -560,9 +559,14 @@ nfs_read_done(struct rpc_task *task)
 		if (data->args.offset + data->args.count >= data->res.fattr->size)
 			data->res.eof = 1;
 	}
-	nfs_readpage_result(task);
+	nfs_readpage_result(task, calldata);
 }
 
+static const struct rpc_call_ops nfs_read_ops = {
+	.rpc_call_done = nfs_read_done,
+	.rpc_release = nfs_readdata_release,
+};
+
 static void
 nfs_proc_read_setup(struct nfs_read_data *data)
 {
@@ -580,20 +584,24 @@ nfs_proc_read_setup(struct nfs_read_data *data)
 	flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
 
 	/* Finalize the task. */
-	rpc_init_task(task, NFS_CLIENT(inode), nfs_read_done, flags);
+	rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs_read_ops, data);
 	rpc_call_setup(task, &msg, 0);
 }
 
-static void
-nfs_write_done(struct rpc_task *task)
+static void nfs_write_done(struct rpc_task *task, void *calldata)
 {
-	struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
+	struct nfs_write_data *data = calldata;
 
 	if (task->tk_status >= 0)
 		nfs_post_op_update_inode(data->inode, data->res.fattr);
-	nfs_writeback_done(task);
+	nfs_writeback_done(task, calldata);
 }
 
+static const struct rpc_call_ops nfs_write_ops = {
+	.rpc_call_done = nfs_write_done,
+	.rpc_release = nfs_writedata_release,
+};
+
 static void
 nfs_proc_write_setup(struct nfs_write_data *data, int how)
 {
@@ -614,7 +622,7 @@ nfs_proc_write_setup(struct nfs_write_data *data, int how)
 	flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
 
 	/* Finalize the task. */
-	rpc_init_task(task, NFS_CLIENT(inode), nfs_write_done, flags);
+	rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs_write_ops, data);
 	rpc_call_setup(task, &msg, 0);
 }
 
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 5f20eafba8ec..21486242c3d3 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -42,9 +42,8 @@ mempool_t *nfs_rdata_mempool;
 
 #define MIN_POOL_READ	(32)
 
-void nfs_readdata_release(struct rpc_task *task)
+void nfs_readdata_release(void *data)
 {
-        struct nfs_read_data   *data = (struct nfs_read_data *)task->tk_calldata;
         nfs_readdata_free(data);
 }
 
@@ -220,9 +219,6 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
 	NFS_PROTO(inode)->read_setup(data);
 
 	data->task.tk_cookie = (unsigned long)inode;
-	data->task.tk_calldata = data;
-	/* Release requests */
-	data->task.tk_release = nfs_readdata_release;
 
 	dprintk("NFS: %4d initiated read call (req %s/%Ld, %u bytes @ offset %Lu)\n",
 			data->task.tk_pid,
@@ -452,9 +448,9 @@ static void nfs_readpage_result_full(struct nfs_read_data *data, int status)
  * This is the callback from RPC telling us whether a reply was
  * received or some error occurred (timeout or socket shutdown).
  */
-void nfs_readpage_result(struct rpc_task *task)
+void nfs_readpage_result(struct rpc_task *task, void *calldata)
 {
-	struct nfs_read_data *data = (struct nfs_read_data *)task->tk_calldata;
+	struct nfs_read_data *data = calldata;
 	struct nfs_readargs *argp = &data->args;
 	struct nfs_readres *resp = &data->res;
 	int status = task->tk_status;
diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
index d639d172d568..1494484ba86d 100644
--- a/fs/nfs/unlink.c
+++ b/fs/nfs/unlink.c
@@ -116,10 +116,9 @@ nfs_async_unlink_init(struct rpc_task *task)
  *
  * Do the directory attribute update.
  */
-static void
-nfs_async_unlink_done(struct rpc_task *task)
+static void nfs_async_unlink_done(struct rpc_task *task, void *calldata)
 {
-	struct nfs_unlinkdata	*data = (struct nfs_unlinkdata *)task->tk_calldata;
+	struct nfs_unlinkdata	*data = calldata;
 	struct dentry		*dir = data->dir;
 	struct inode		*dir_i;
 
@@ -141,13 +140,17 @@ nfs_async_unlink_done(struct rpc_task *task)
  * We need to call nfs_put_unlinkdata as a 'tk_release' task since the
  * rpc_task would be freed too.
  */
-static void
-nfs_async_unlink_release(struct rpc_task *task)
+static void nfs_async_unlink_release(void *calldata)
 {
-	struct nfs_unlinkdata	*data = (struct nfs_unlinkdata *)task->tk_calldata;
+	struct nfs_unlinkdata	*data = calldata;
 	nfs_put_unlinkdata(data);
 }
 
+static const struct rpc_call_ops nfs_unlink_ops = {
+	.rpc_call_done = nfs_async_unlink_done,
+	.rpc_release = nfs_async_unlink_release,
+};
+
 /**
  * nfs_async_unlink - asynchronous unlinking of a file
  * @dentry: dentry to unlink
@@ -179,10 +182,8 @@ nfs_async_unlink(struct dentry *dentry)
 	data->count = 1;
 
 	task = &data->task;
-	rpc_init_task(task, clnt, nfs_async_unlink_done , RPC_TASK_ASYNC);
-	task->tk_calldata = data;
+	rpc_init_task(task, clnt, RPC_TASK_ASYNC, &nfs_unlink_ops, data);
 	task->tk_action = nfs_async_unlink_init;
-	task->tk_release = nfs_async_unlink_release;
 
 	spin_lock(&dentry->d_lock);
 	dentry->d_flags |= DCACHE_NFSFS_RENAMED;
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 95d00f9132d0..80bc4ea1b824 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -104,9 +104,8 @@ static inline void nfs_commit_free(struct nfs_write_data *p)
 	mempool_free(p, nfs_commit_mempool);
 }
 
-static void nfs_writedata_release(struct rpc_task *task)
+void nfs_writedata_release(void *wdata)
 {
-	struct nfs_write_data	*wdata = (struct nfs_write_data *)task->tk_calldata;
 	nfs_writedata_free(wdata);
 }
 
@@ -871,9 +870,6 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
 
 	data->task.tk_priority = flush_task_priority(how);
 	data->task.tk_cookie = (unsigned long)inode;
-	data->task.tk_calldata = data;
-	/* Release requests */
-	data->task.tk_release = nfs_writedata_release;
 
 	dprintk("NFS: %4d initiated write call (req %s/%Ld, %u bytes @ offset %Lu)\n",
 		data->task.tk_pid,
@@ -1131,9 +1127,9 @@ static void nfs_writeback_done_full(struct nfs_write_data *data, int status)
 /*
  * This function is called when the WRITE call is complete.
  */
-void nfs_writeback_done(struct rpc_task *task)
+void nfs_writeback_done(struct rpc_task *task, void *calldata)
 {
-	struct nfs_write_data	*data = (struct nfs_write_data *) task->tk_calldata;
+	struct nfs_write_data	*data = calldata;
 	struct nfs_writeargs	*argp = &data->args;
 	struct nfs_writeres	*resp = &data->res;
 
@@ -1200,9 +1196,8 @@ void nfs_writeback_done(struct rpc_task *task)
 
 
 #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
-static void nfs_commit_release(struct rpc_task *task)
+void nfs_commit_release(void *wdata)
 {
-	struct nfs_write_data	*wdata = (struct nfs_write_data *)task->tk_calldata;
 	nfs_commit_free(wdata);
 }
 
@@ -1238,9 +1233,6 @@ static void nfs_commit_rpcsetup(struct list_head *head,
 
 	data->task.tk_priority = flush_task_priority(how);
 	data->task.tk_cookie = (unsigned long)inode;
-	data->task.tk_calldata = data;
-	/* Release requests */
-	data->task.tk_release = nfs_commit_release;
 	
 	dprintk("NFS: %4d initiated commit call\n", data->task.tk_pid);
 }
@@ -1277,10 +1269,9 @@ nfs_commit_list(struct list_head *head, int how)
 /*
  * COMMIT call returned
  */
-void
-nfs_commit_done(struct rpc_task *task)
+void nfs_commit_done(struct rpc_task *task, void *calldata)
 {
-	struct nfs_write_data	*data = (struct nfs_write_data *)task->tk_calldata;
+	struct nfs_write_data	*data = calldata;
 	struct nfs_page		*req;
 	int res = 0;