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authorAl Viro <viro@zeniv.linux.org.uk>2014-03-22 06:57:37 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2014-05-06 17:32:54 -0400
commit37938463540b075e9166cf774c59274379f7a8ca (patch)
treed264115725c6a6a6bada139fa04369389ce889fe /fs/block_dev.c
parent0c949334a9e2581646c6ff0d1470a805b1e5be99 (diff)
downloadlwn-37938463540b075e9166cf774c59274379f7a8ca.tar.gz
lwn-37938463540b075e9166cf774c59274379f7a8ca.zip
blkdev_aio_read(): switch to generic_file_read_iter(), get rid of iov_shorten()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 937e3011ed58..b140badb8184 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1538,14 +1538,17 @@ static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
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);
if (pos >= size)
return 0;
size -= pos;
- if (size < iocb->ki_nbytes)
- nr_segs = iov_shorten((struct iovec *)iov, nr_segs, size);
- return generic_file_aio_read(iocb, iov, nr_segs, pos);
+ iov_iter_truncate(&to, size);
+ return generic_file_read_iter(iocb, &to);
}
/*