fs/block_dev.c: switch to ->read_iter()

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

diff --git a/fs/block_dev.c b/fs/block_dev.c
index b140badb8184cad9e56e3b0e9f383b38b371e950..3d97f4a257ff67ad0152eb18e85729eaf64229d8 100644 (file)
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1532,23 +1532,19 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
 }
 EXPORT_SYMBOL_GPL(blkdev_aio_write);
 
-static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
-                        unsigned long nr_segs, loff_t pos)
+static ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to)
 {
        struct file *file = iocb->ki_filp;
        struct inode *bd_inode = file->f_mapping->host;
        loff_t size = i_size_read(bd_inode);
-       size_t count = iocb->ki_nbytes;
-       struct iov_iter to;
-
-       iov_iter_init(&to, READ, iov, nr_segs, count);
+       loff_t pos = iocb->ki_pos;
 
        if (pos >= size)
                return 0;
 
        size -= pos;
-       iov_iter_truncate(&to, size);
-       return generic_file_read_iter(iocb, &to);
+       iov_iter_truncate(to, size);
+       return generic_file_read_iter(iocb, to);
 }
 
 /*
@@ -1580,9 +1576,9 @@ const struct file_operations def_blk_fops = {
        .open           = blkdev_open,
        .release        = blkdev_close,
        .llseek         = block_llseek,
-       .read           = do_sync_read,
+       .read           = new_sync_read,
        .write          = do_sync_write,
-       .aio_read       = blkdev_aio_read,
+       .read_iter      = blkdev_read_iter,
        .aio_write      = blkdev_aio_write,
        .mmap           = generic_file_mmap,
        .fsync          = blkdev_fsync,