generic_file_direct_write(): switch to iov_iter

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

4 files changed, 10 insertions, 13 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index ae6af07..9fe20c2 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1669,15 +1669,13 @@ static ssize_t __btrfs_direct_write(struct kiocb *iocb,
 	loff_t endbyte;
 	int err;
 
-	written = generic_file_direct_write(iocb, iov, &nr_segs, pos,
-					    count, ocount);
+	iov_iter_init(&i, iov, nr_segs, count, 0);
+	written = generic_file_direct_write(iocb, &i, pos, count, ocount);
 
 	if (written < 0 || written == count)
 		return written;
 
 	pos += written;
-	count -= written;
-	iov_iter_init(&i, iov, nr_segs, count, written);
 	written_buffered = __btrfs_buffered_write(file, &i, pos);
 	if (written_buffered < 0) {
 		err = written_buffered;
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 96d513e..126deb5 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1235,15 +1235,13 @@ static ssize_t fuse_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
 		goto out;
 
 	if (file->f_flags & O_DIRECT) {
-		written = generic_file_direct_write(iocb, iov, &nr_segs, pos, 
-						    count, ocount);
+		iov_iter_init(&i, iov, nr_segs, count, 0);
+		written = generic_file_direct_write(iocb, &i, pos, count, ocount);
 		if (written < 0 || written == count)
 			goto out;
 
 		pos += written;
-		count -= written;
 
-		iov_iter_init(&i, iov, nr_segs, count, written);
 		written_buffered = fuse_perform_write(file, mapping, &i, pos);
 		if (written_buffered < 0) {
 			err = written_buffered;
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 8970dcf..d6d78c2 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2251,6 +2251,7 @@ static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
 	int full_coherency = !(osb->s_mount_opt &
 			       OCFS2_MOUNT_COHERENCY_BUFFERED);
 	int unaligned_dio = 0;
+	struct iov_iter from;
 
 	trace_ocfs2_file_aio_write(inode, file, file->f_path.dentry,
 		(unsigned long long)OCFS2_I(inode)->ip_blkno,
@@ -2365,16 +2366,15 @@ relock:
 	if (ret)
 		goto out_dio;
 
+	iov_iter_init(&from, iov, nr_segs, count, 0);
 	if (direct_io) {
-		written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
+		written = generic_file_direct_write(iocb, &from, *ppos,
 						    count, ocount);
 		if (written < 0) {
 			ret = written;
 			goto out_dio;
 		}
 	} else {
-		struct iov_iter from;
-		iov_iter_init(&from, iov, nr_segs, count, 0);
 		current->backing_dev_info = file->f_mapping->backing_dev_info;
 		written = generic_perform_write(file, &from, *ppos);
 		if (likely(written >= 0))
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 951a232..8617497 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -641,6 +641,7 @@ xfs_file_dio_aio_write(
 	int			iolock;
 	struct xfs_buftarg	*target = XFS_IS_REALTIME_INODE(ip) ?
 					mp->m_rtdev_targp : mp->m_ddev_targp;
+	struct iov_iter		from;
 
 	/* DIO must be aligned to device logical sector size */
 	if ((pos | count) & target->bt_logical_sectormask)
@@ -698,8 +699,8 @@ xfs_file_dio_aio_write(
 	}
 
 	trace_xfs_file_direct_write(ip, count, iocb->ki_pos, 0);
-	ret = generic_file_direct_write(iocb, iovp,
-			&nr_segs, pos, count, ocount);
+	iov_iter_init(&from, iovp, nr_segs, count, 0);
+	ret = generic_file_direct_write(iocb, &from, pos, count, ocount);
 
 out:
 	xfs_rw_iunlock(ip, iolock);