On 11/16/20 3:58 PM, Christoph Hellwig wrote:
Instead of having two structures that represent each block device with different lift time rules merged them into a single one. This also greatly simplifies the reference counting rules, as we can use the inode reference count as the main reference count for the new struct block_device, with the device model reference front ending it for device model interaction. The percpu refcount in struct hd_struct is entirely gone given that struct block_device must be opened and thus valid for the duration of the I/O. Signed-off-by: Christoph Hellwig <hch@xxxxxx> --- block/bio.c | 6 +- block/blk-cgroup.c | 9 +- block/blk-core.c | 85 +++++----- block/blk-flush.c | 2 +- block/blk-lib.c | 2 +- block/blk-merge.c | 6 +- block/blk-mq.c | 11 +- block/blk-mq.h | 5 +- block/blk.h | 38 ++--- block/genhd.c | 242 +++++++++++------------------ block/ioctl.c | 4 +- block/partitions/core.c | 221 +++++++------------------- 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 | 8 +- drivers/md/md.c | 4 +- drivers/nvme/target/admin-cmd.c | 20 +-- drivers/s390/block/dasd.c | 8 +- fs/block_dev.c | 68 +++----- fs/ext4/super.c | 18 +-- fs/ext4/sysfs.c | 10 +- fs/f2fs/checkpoint.c | 5 +- fs/f2fs/f2fs.h | 2 +- fs/f2fs/super.c | 6 +- fs/f2fs/sysfs.c | 9 -- include/linux/blk_types.h | 23 ++- include/linux/blkdev.h | 13 +- include/linux/genhd.h | 67 ++------ include/linux/part_stat.h | 17 +- init/do_mounts.c | 20 +-- kernel/trace/blktrace.c | 54 ++----- 33 files changed, 351 insertions(+), 642 deletions(-)
Reviewed-by: Hannes Reinecke <hare@xxxxxxx> Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@xxxxxxx +49 911 74053 688 SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer
