pohmelfs: Use __generic_file_aio_write instead of generic_file_aio_write_nolock

Use new helper __generic_file_aio_write(). Since the fs takes care of syncing
by itself afterwards, there are no more changes needed.

CC: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/drivers/staging/pohmelfs/inode.c b/drivers/staging/pohmelfs/inode.c
index e63c9be..e9d41e4 100644
--- a/drivers/staging/pohmelfs/inode.c
+++ b/drivers/staging/pohmelfs/inode.c
@@ -921,7 +921,7 @@
 	if (ret)
 		goto err_out_unlock;
 
-	ret = generic_file_aio_write_nolock(&kiocb, &iov, 1, pos);
+	ret = __generic_file_aio_write(&kiocb, &iov, 1, &kiocb.ki_pos);
 	*ppos = kiocb.ki_pos;
 
 	mutex_unlock(&inode->i_mutex);