On 11/24/20 9:27 PM, Christoph Hellwig wrote:
> Use struct block_device to lookup partitions on a disk. This removes
> all usage of struct hd_struct from the I/O path, and this allows removing
> the percpu refcount in struct hd_struct.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
For the bcache part, Acked-by: Coly Li <colyli@xxxxxxx>
> ---
> block/bio.c | 4 +-
> block/blk-core.c | 66 ++++++++++++++----------------
> block/blk-flush.c | 2 +-
> block/blk-mq.c | 9 ++--
> block/blk-mq.h | 7 ++--
> block/blk.h | 4 +-
> block/genhd.c | 56 +++++++++++++------------
> block/partitions/core.c | 7 +---
> drivers/block/drbd/drbd_receiver.c | 2 +-
> drivers/block/drbd/drbd_worker.c | 2 +-
> drivers/block/zram/zram_drv.c | 2 +-
> drivers/md/bcache/request.c | 4 +-
> drivers/md/dm.c | 4 +-
> drivers/md/md.c | 4 +-
> drivers/nvme/target/admin-cmd.c | 20 ++++-----
> fs/ext4/super.c | 18 +++-----
> fs/ext4/sysfs.c | 10 +----
> fs/f2fs/f2fs.h | 2 +-
> fs/f2fs/super.c | 6 +--
> include/linux/blkdev.h | 8 ++--
> include/linux/genhd.h | 4 +-
> include/linux/part_stat.h | 17 ++++----
> 22 files changed, 120 insertions(+), 138 deletions(-)
[snipped]
> diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
> index afac8d07c1bd00..85b1f2a9b72d68 100644
> --- a/drivers/md/bcache/request.c
> +++ b/drivers/md/bcache/request.c
> @@ -475,7 +475,7 @@ struct search {
> unsigned int read_dirty_data:1;
> unsigned int cache_missed:1;
>
> - struct hd_struct *part;
> + struct block_device *part;
> unsigned long start_time;
>
> struct btree_op op;
> @@ -1073,7 +1073,7 @@ struct detached_dev_io_private {
> unsigned long start_time;
> bio_end_io_t *bi_end_io;
> void *bi_private;
> - struct hd_struct *part;
> + struct block_device *part;
> };
[snipped]
