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Christoph Hellwig d31b82b7f0 block, loop: support partitions without scanning 
commit b9684a71fc upstream.

Historically we did distinguish between a flag that surpressed partition
scanning, and a combinations of the minors variable and another flag if
any partitions were supported.  This was generally confusing and doesn't
make much sense, but some corner case uses of the loop driver actually
do want to support manually added partitions on a device that does not
actively scan for partitions.  To make things worsee the loop driver
also wants to dynamically toggle the scanning for partitions on a live
gendisk, which makes the disk->flags updates non-atomic.

Introduce a new GD_SUPPRESS_PART_SCAN bit in disk->state that disables
just scanning for partitions, and toggle that instead of GENHD_FL_NO_PART
in the loop driver.

Fixes: 1ebe2e5f9d ("block: remove GENHD_FL_EXT_DEVT")
Reported-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220527055806.1972352-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2022-06-14 18:41:52 +02:00
..
partitions block: remove GENHD_FL_EXT_DEVT 2021-11-29 06:38:35 -07:00
Kconfig block: only build the icq tracking code when needed 2021-12-16 10:59:02 -07:00
Kconfig.iosched block: only build the icq tracking code when needed 2021-12-16 10:59:02 -07:00
Makefile block: remove blk-exec.c 2021-11-29 06:34:50 -07:00
badblocks.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
bdev.c mm: remove cleancache 2022-01-22 08:33:38 +02:00
bfq-cgroup.c bfq: Make sure bfqg for which we are queueing requests is online 2022-06-09 10:26:18 +02:00
bfq-iosched.c bfq: Get rid of __bio_blkcg() usage 2022-06-09 10:26:18 +02:00
bfq-iosched.h bfq: Get rid of __bio_blkcg() usage 2022-06-09 10:26:18 +02:00
bfq-wf2q.c block/bfq_wf2q: correct weight to ioprio 2022-04-08 13:58:36 +02:00
bio-integrity.c block: bio-integrity: Advance seed correctly for larger interval sizes 2022-02-03 21:09:24 -07:00
bio.c block: make bioset_exit() fully resilient against being called twice 2022-06-14 18:41:23 +02:00
blk-cgroup-rwstat.c blk-cgroup: Fix the recursive blkg rwstat 2021-03-05 11:32:15 -07:00
blk-cgroup-rwstat.h
…
blk-cgroup.c block: fix bio_clone_blkg_association() to associate with proper blkcg_gq 2022-06-09 10:26:32 +02:00
blk-core.c block: use bio_queue_enter instead of blk_queue_enter in bio_poll 2022-06-14 18:41:23 +02:00
blk-crypto-fallback.c blk-crypto: rename blk_keyslot_manager to blk_crypto_profile 2021-10-21 10:49:32 -06:00
blk-crypto-internal.h block: move struct request to blk-mq.h 2021-10-18 06:17:02 -06:00
blk-crypto-profile.c blk-crypto: remove blk_crypto_unregister() 2021-11-29 06:38:51 -07:00
blk-crypto.c blk-crypto: rename blk_keyslot_manager to blk_crypto_profile 2021-10-21 10:49:32 -06:00
blk-flush.c block: switch to atomic_t for request references 2021-12-03 14:51:29 -07:00
blk-ia-ranges.c block: Fix potential deadlock in blk_ia_range_sysfs_show() 2022-06-09 10:26:20 +02:00
blk-integrity.c blk-crypto: remove blk_crypto_unregister() 2021-11-29 06:38:51 -07:00
blk-ioc.c block: restore the old set_task_ioprio() behaviour wrt PF_EXITING 2022-04-08 13:58:57 +02:00
blk-iocost.c iocost: don't reset the inuse weight of under-weighted debtors 2022-05-09 09:16:16 +02:00
blk-iolatency.c blk-iolatency: Fix inflight count imbalances and IO hangs on offline 2022-06-09 10:26:30 +02:00
blk-ioprio.c blk-ioprio: don't set bio priority if not needed 2021-11-29 06:38:35 -07:00
blk-ioprio.h block: Introduce the ioprio rq-qos policy 2021-06-21 15:03:40 -06:00
blk-lib.c block: export blk_next_bio() 2021-06-17 15:51:20 +02:00
blk-map.c block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern 2022-02-17 07:54:03 -07:00
blk-merge.c block: throttle split bio in case of iops limit 2022-04-08 13:58:36 +02:00
blk-mq-cpumap.c blk-mq: remove the calling of local_memory_node() 2020-10-20 07:08:17 -06:00
blk-mq-debugfs-zoned.c
…
blk-mq-debugfs.c blk-mq: check q->poll_stat in queue_poll_stat_show 2021-12-02 08:20:49 -07:00
blk-mq-debugfs.h
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blk-mq-pci.c
…
blk-mq-rdma.c
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blk-mq-sched.c block: limit request dispatch loop duration 2022-04-08 13:57:26 +02:00
blk-mq-sched.h block: move blk_mq_sched_assign_ioc to blk-ioc.c 2021-11-29 06:41:29 -07:00
blk-mq-sysfs.c blk-mq: move srcu from blk_mq_hw_ctx to request_queue 2021-12-03 14:51:29 -07:00
blk-mq-tag.c blk-mq: fix tag_get wait task can't be awakened 2022-01-13 12:52:14 -07:00
blk-mq-tag.h blk-mq: Delete busy_iter_fn 2021-12-06 13:18:47 -07:00
blk-mq-virtio.c
…
blk-mq.c blk-mq: do not update io_ticks with passthrough requests 2022-06-14 18:41:23 +02:00
blk-mq.h blk-mq: don't run might_sleep() if the operation needn't blocking 2021-12-06 09:40:42 -07:00
blk-pm.c scsi: block: pm: Always set request queue runtime active in blk_post_runtime_resume() 2021-12-22 23:38:29 -05:00
blk-pm.h block: Remove unused blk_pm_*() function definitions 2021-02-22 06:33:48 -07:00
blk-rq-qos.c rq-qos: fix missed wake-ups in rq_qos_throttle try two 2021-06-08 15:12:57 -06:00
blk-rq-qos.h block: fix rq-qos breakage from skipping rq_qos_done_bio() 2022-04-08 13:57:26 +02:00
blk-settings.c block: Fix partition check for host-aware zoned block devices 2021-10-27 06:58:01 -06:00
blk-stat.c block: make queue stat accounting a reference 2021-12-14 17:23:05 -07:00
blk-stat.h block: make queue stat accounting a reference 2021-12-14 17:23:05 -07:00
blk-sysfs.c block: don't delete queue kobject before its children 2022-04-08 13:57:35 +02:00
blk-throttle.c blk-throttle: Set BIO_THROTTLED when bio has been throttled 2022-06-09 10:25:29 +02:00
blk-throttle.h block: throttle split bio in case of iops limit 2022-04-08 13:58:36 +02:00
blk-timeout.c
…
blk-wbt.c blk-wbt: prevent NULL pointer dereference in wb_timer_fn 2021-10-19 06:13:41 -06:00
blk-wbt.h blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled() 2021-06-21 15:03:41 -06:00
blk-zoned.c block: Hold invalidate_lock in BLKRESETZONE ioctl 2021-11-11 11:52:46 -07:00
blk.h block: only build the icq tracking code when needed 2021-12-16 10:59:02 -07:00
bounce.c mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h> 2021-10-18 06:17:01 -06:00
bsg-lib.c block: remove the gendisk argument to blk_execute_rq 2021-11-29 06:41:29 -07:00
bsg.c scsi: bsg: Fix device unregistration 2021-09-14 00:22:15 -04:00
disk-events.c block: return errors from disk_alloc_events 2021-08-23 12:55:45 -06:00
elevator.c block/wbt: fix negative inflight counter when remove scsi device 2022-02-17 07:54:03 -07:00
elevator.h block: move elevator.h to block/ 2021-10-18 06:17:01 -06:00
fops.c block: clear iocb->private in blkdev_bio_end_io_async() 2022-02-22 06:59:49 -07:00
genhd.c block, loop: support partitions without scanning 2022-06-14 18:41:52 +02:00
holder.c block: drop unused includes in <linux/genhd.h> 2021-10-18 06:17:02 -06:00
ioctl.c block/compat_ioctl: fix range check in BLKGETSIZE 2022-04-27 14:40:54 +02:00
ioprio.c for-5.17/block-2022-01-11 2022-01-12 10:26:52 -08:00
kyber-iosched.c block: make queue stat accounting a reference 2021-12-14 17:23:05 -07:00
mq-deadline.c block/mq-deadline: Set the fifo_time member also if inserting at head 2022-05-25 09:59:06 +02:00
opal_proto.h
…
sed-opal.c
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t10-pi.c block: move integrity handling out of <linux/blkdev.h> 2021-10-18 06:17:02 -06:00