Re: [PATCH 30/45] block: remove the nr_sects field in struct hd_struct
From: Coly Li <hidden>
Date: 2020-11-24 13:34:26
Also in:
dm-devel, linux-bcache, linux-fsdevel, linux-mm, xen-devel
On 11/24/20 9:27 PM, Christoph Hellwig wrote:
Now that the hd_struct always has a block device attached to it, there is no need for having two size field that just get out of sync. Additional the field in hd_struct did not use proper serializiation, possibly allowing for torn writes. By only using the block_device field this problem also gets fixed. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
For the bcache part, Acked-by: Coly Li [off-list ref] Thanks. Coly Li
--- block/bio.c | 4 +- block/blk-core.c | 2 +- block/blk.h | 53 ---------------------- block/genhd.c | 55 +++++++++++----------- block/partitions/core.c | 17 ++++--- drivers/block/loop.c | 1 - drivers/block/nbd.c | 2 +- drivers/block/xen-blkback/common.h | 4 +- drivers/md/bcache/super.c | 2 +- drivers/s390/block/dasd_ioctl.c | 4 +- drivers/target/target_core_pscsi.c | 7 +-- fs/block_dev.c | 73 +----------------------------- fs/f2fs/super.c | 2 +- fs/pstore/blk.c | 2 +- include/linux/genhd.h | 29 +++--------- kernel/trace/blktrace.c | 2 +- 16 files changed, 60 insertions(+), 199 deletions(-)
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quoted hunk ↗ jump to hunk
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index c55d3c58a7ef55..04fa40868fbe10 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c@@ -1408,7 +1408,7 @@ 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_sectors(dc->bdev) - dc->sb.data_offset, dc->bdev, &bcache_cached_ops); if (ret) return ret;
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