On 2019/6/17 9:28 上午, Chaitanya Kulkarni wrote: > In the bcache when initializing the device we don't actually use any > sort of locking when reading the number of sectors from the part. This > patch updates the cached_dev_init() with newly introduced helper > function to read the nr_sects from block device's hd_parts with the help > of part_nr_sects_read(). > > Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx> Acked-by: Coly Li <colyli@xxxxxxx> Thanks. Coly Li > --- > drivers/md/bcache/super.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c > index 1b63ac876169..6a29ba89dae1 100644 > --- a/drivers/md/bcache/super.c > +++ b/drivers/md/bcache/super.c > @@ -1263,7 +1263,7 @@ static int cached_dev_init(struct cached_dev *dc, unsigned int block_size) > q->limits.raid_partial_stripes_expensive; > > ret = bcache_device_init(&dc->disk, block_size, > - dc->bdev->bd_part->nr_sects - dc->sb.data_offset); > + bdev_nr_sects(dc->bdev) - dc->sb.data_offset); > if (ret) > return ret; > >
