Messages in this thread | | | Date | Thu, 9 May 2002 17:45:33 -0400 (EDT) | From | Alexander Viro <> | Subject | Re: Reading page from given block device |
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On Thu, 9 May 2002, Pavel Machek wrote:
> Hi! > > > > Well, I'm doing it during boot, and this is swap partition; it should > > > not have been accessed previously. > > > > > > > > bdev = bdget(kdev_t_to_nr(dev)); > > > > > if (!bdev) { > > > > > printk("No block device for %s\n", __bdevname(dev)); > > > > > BUG(); > > > > > } > > > > > printk("C"); > > > > blkdev_open(bdev, FMODE_READ, O_RDONLY, BDEV_RAW) > > blkdev_open is
grr... s/open/get/ - sorry.
> fs.h:extern int blkdev_open(struct inode *, struct file *); > > ... I can't see how to use it in this context. > > > > > > if (!bh || (!bh->b_data)) { > > > > > return -1; > > > > However, I would really suggest to open the bugger once, do all IO and > > then close it. See how raw.c and friends deal with these problems. > > Performance should not matter here.
Yeah, but amount of places that mess with kdev_t should.
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