NFS: add dreq to nfs_commit_info

Need this to pass into nfs_commitdata_init, in order to keep data->dreq
accurate.
Signed-off-by: NFred Isaman <iisaman@netapp.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/write.c

@@ -506,6 +506,7 @@ static void nfs_init_cinfo_from_inode(struct nfs_commit_info *cinfo,
 	cinfo->lock = &inode->i_lock;
 	cinfo->mds = &NFS_I(inode)->commit_info;
 	cinfo->ds = pnfs_get_ds_info(inode);
+	cinfo->dreq = NULL;
 	cinfo->completion_ops = &nfs_commit_completion_ops;
 }
 
@@ -1431,6 +1432,7 @@ void nfs_init_commit(struct nfs_commit_data *data,
 	data->lseg	  = lseg; /* reference transferred */
 	data->mds_ops     = &nfs_commit_ops;
 	data->completion_ops = cinfo->completion_ops;
+	data->dreq	  = cinfo->dreq;
 
 	data->args.fh     = NFS_FH(data->inode);
 	/* Note: we always request a commit of the entire inode */

include/linux/nfs_xdr.h

@@ -1274,6 +1274,7 @@ struct nfs_commit_info {
 	spinlock_t			*lock;
 	struct nfs_mds_commit_info	*mds;
 	struct pnfs_ds_commit_info	*ds;
+	struct nfs_direct_req		*dreq;	/* O_DIRECT request */
 	const struct nfs_commit_completion_ops *completion_ops;
 };