NFS: Create a common pgio_rpc_prepare function

The read and write paths do exactly the same thing for the rpc_prepare
rpc_op.  This patch combines them together into a single function.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index ca356fe0836b..0fa211d35e40 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -387,6 +387,32 @@ void nfs_pgio_data_release(struct nfs_pgio_data *data)
 EXPORT_SYMBOL_GPL(nfs_pgio_data_release);
 
 /**
+ * nfs_pgio_prepare - Prepare pageio data to go over the wire
+ * @task: The current task
+ * @calldata: pageio data to prepare
+ */
+void nfs_pgio_prepare(struct rpc_task *task, void *calldata)
+{
+        struct nfs_pgio_data *data = calldata;
+        int err;
+        err = NFS_PROTO(data->header->inode)->pgio_rpc_prepare(task, data);
+        if (err)
+                rpc_exit(task, err);
+}
+
+/**
+ * nfs_pgio_release - Release pageio data
+ * @calldata: The pageio data to release
+ */
+void nfs_pgio_release(void *calldata)
+{
+        struct nfs_pgio_data *data = calldata;
+        if (data->header->rw_ops->rw_release)
+                data->header->rw_ops->rw_release(data);
+        nfs_pgio_data_release(data);
+}
+
+/**
  * nfs_pageio_init - initialise a page io descriptor
  * @desc: pointer to descriptor
  * @inode: pointer to inode