[PATCH 38/45] block: switch partition lookup to use struct block_device

[Chao Yu]

On 2020/11/24 21:27, 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 at lst.de>
> ---
>   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 +--

For f2fs part,

Acked-by: Chao Yu <yuchao0 at huawei.com>

Thanks,

>   include/linux/blkdev.h             |  8 ++--
>   include/linux/genhd.h              |  4 +-
>   include/linux/part_stat.h          | 17 ++++----
>   22 files changed, 120 insertions(+), 138 deletions(-)