__btrfs_direct_write(): switch to iov_iter

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

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 15272d48674b0aea5afeeb0e05566a3beb056a03..24b346299fa360a47d249f9fa432c39d4cb622c7 100644 (file)
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1658,25 +1658,23 @@ again:
 }
 
 static ssize_t __btrfs_direct_write(struct kiocb *iocb,
-                                   const struct iovec *iov,
-                                   unsigned long nr_segs, loff_t pos,
+                                   struct iov_iter *from,
+                                   loff_t pos,
                                    size_t count, size_t ocount)
 {
        struct file *file = iocb->ki_filp;
-       struct iov_iter i;
        ssize_t written;
        ssize_t written_buffered;
        loff_t endbyte;
        int err;
 
-       iov_iter_init(&i, iov, nr_segs, count, 0);
-       written = generic_file_direct_write(iocb, &i, pos, count, ocount);
+       written = generic_file_direct_write(iocb, from, pos, count, ocount);
 
        if (written < 0 || written == count)
                return written;
 
        pos += written;
-       written_buffered = __btrfs_buffered_write(file, &i, pos);
+       written_buffered = __btrfs_buffered_write(file, from, pos);
        if (written_buffered < 0) {
                err = written_buffered;
                goto out;
@@ -1724,6 +1722,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
        ssize_t err = 0;
        size_t count, ocount;
        bool sync = (file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host);
+       struct iov_iter i;
 
        mutex_lock(&inode->i_mutex);
 
@@ -1746,6 +1745,8 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
                goto out;
        }
 
+       iov_iter_init(&i, iov, nr_segs, count, 0);
+
        err = file_remove_suid(file);
        if (err) {
                mutex_unlock(&inode->i_mutex);
@@ -1787,13 +1788,9 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
                atomic_inc(&BTRFS_I(inode)->sync_writers);
 
        if (unlikely(file->f_flags & O_DIRECT)) {
-               num_written = __btrfs_direct_write(iocb, iov, nr_segs,
+               num_written = __btrfs_direct_write(iocb, &i,
                                                   pos, count, ocount);
        } else {
-               struct iov_iter i;
-
-               iov_iter_init(&i, iov, nr_segs, count, num_written);
-
                num_written = __btrfs_buffered_write(file, &i, pos);
                if (num_written > 0)
                        iocb->ki_pos = pos + num_written;