bd_abort_claiming(bdev, truncate_bdev_range);
return 0;
}
-EXPORT_SYMBOL(truncate_bdev_range);
static void set_init_blocksize(struct block_device *bdev)
{
static ssize_t
__blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
- int nr_pages)
+ unsigned int nr_pages)
{
struct file *file = iocb->ki_filp;
struct block_device *bdev = I_BDEV(bdev_file_inode(file));
}
}
-static ssize_t
-__blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages)
+static ssize_t __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
+ unsigned int nr_pages)
{
struct file *file = iocb->ki_filp;
struct inode *inode = bdev_file_inode(file);
dio->size += bio->bi_iter.bi_size;
pos += bio->bi_iter.bi_size;
- nr_pages = iov_iter_npages(iter, BIO_MAX_PAGES);
+ nr_pages = bio_iov_vecs_to_alloc(iter, BIO_MAX_PAGES);
if (!nr_pages) {
bool polled = false;
static ssize_t
blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
- int nr_pages;
+ unsigned int nr_pages;
- nr_pages = iov_iter_npages(iter, BIO_MAX_PAGES + 1);
- if (!nr_pages)
+ if (!iov_iter_count(iter))
return 0;
+
+ nr_pages = bio_iov_vecs_to_alloc(iter, BIO_MAX_PAGES + 1);
if (is_sync_kiocb(iocb) && nr_pages <= BIO_MAX_PAGES)
return __blkdev_direct_IO_simple(iocb, iter, nr_pages);
- return __blkdev_direct_IO(iocb, iter, min(nr_pages, BIO_MAX_PAGES));
+ return __blkdev_direct_IO(iocb, iter, bio_max_segs(nr_pages));
}
static __init int blkdev_init(void)
* i_mutex and doing so causes performance issues with concurrent
* O_SYNC writers to a block device.
*/
- error = blkdev_issue_flush(bdev, GFP_KERNEL);
+ error = blkdev_issue_flush(bdev);
if (error == -EOPNOTSUPP)
error = 0;
return ret;
}
/*
- * Only exported for for loop and dasd for historic reasons. Don't use in new
+ * Only exported for loop and dasd for historic reasons. Don't use in new
* code!
*/
EXPORT_SYMBOL_GPL(bdev_disk_changed);
return error;
/*
- * Invalidate again; if someone wandered in and dirtied a page,
- * the caller will be given -EBUSY. The third argument is
- * inclusive, so the rounding here is safe.
+ * Invalidate the page cache again; if someone wandered in and dirtied
+ * a page, we just discard it - userspace has no way of knowing whether
+ * the write happened before or after discard completing...
*/
- return invalidate_inode_pages2_range(bdev->bd_inode->i_mapping,
- start >> PAGE_SHIFT,
- end >> PAGE_SHIFT);
+ return truncate_bdev_range(bdev, file->f_mode, start, end);
}
const struct file_operations def_blk_fops = {