unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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block: use new bdev_nr_bytes() helper for blkdev_{read,write}_iter()

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We have new helpers for this, use them rather than the slower inode
size reads. This makes the read/write path consistent with most of
the rest of block as well.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/a72767cd-3c6d-47f7-80f4-aa025a17b2cb@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2021-11-04 15:13:17 -06:00
parent 2116274af4
commit 138c1a3811
1 changed files with 2 additions and 2 deletions
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4
block/fops.c
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@ -460,7 +460,7 @@ static ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct block_device *bdev = iocb->ki_filp->private_data;
struct inode *bd_inode = bdev->bd_inode;
loff_t size = i_size_read(bd_inode);
loff_t size = bdev_nr_bytes(bdev);
struct blk_plug plug;
size_t shorted = 0;
ssize_t ret;
@ -498,7 +498,7 @@ static ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
static ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
struct block_device *bdev = iocb->ki_filp->private_data;
loff_t size = i_size_read(bdev->bd_inode);
loff_t size = bdev_nr_bytes(bdev);
loff_t pos = iocb->ki_pos;
size_t shorted = 0;
ssize_t ret;