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Mikulas Patocka 6930c0229f dm-snapshot: fix 'scheduling while atomic' on real-time kernels 
[ Upstream commit 8581b19eb2 ]

There is reported 'scheduling while atomic' bug when using dm-snapshot on
real-time kernels. The reason for the bug is that the hlist_bl code does
preempt_disable() when taking the lock and the kernel attempts to take
other spinlocks while holding the hlist_bl lock.

Fix this by converting a hlist_bl spinlock into a regular spinlock.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reported-by: Jiping Ma <jiping.ma2@windriver.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2026-01-17 16:35:16 +01:00
..
bcache
block: remove the bi_inline_vecs variable sized array from struct bio
2025-09-09 07:31:59 -06:00
dm-pcache
dm pcache: fix segment info indexing
2026-01-08 10:17:03 +01:00
dm-vdo
Merge tag 'for-6.18/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2025-10-03 18:48:02 -07:00
persistent-data
lib/crc: remove CONFIG_LIBCRC32C
2025-04-04 11:31:42 -07:00
dm-audit.c
…
dm-audit.h
…
dm-bio-prison-v1.c
dm cache: Remove unused functions in bio-prison-v1
2024-11-20 11:38:04 +01:00
dm-bio-prison-v1.h
dm cache: Remove unused functions in bio-prison-v1
2024-11-20 11:38:04 +01:00
dm-bio-prison-v2.c
dm: use bio_list_merge_init
2024-04-01 11:53:37 -06:00
dm-bio-prison-v2.h
…
dm-bio-record.h
…
dm-bufio.c
dm-bufio: align write boundary on physical block size
2026-01-08 10:17:02 +01:00
dm-builtin.c
…
dm-cache-background-tracker.c
dm cache: Remove unused btracker_nr_writebacks_queued
2024-11-20 11:38:04 +01:00
dm-cache-background-tracker.h
dm cache: Remove unused btracker_nr_writebacks_queued
2024-11-20 11:38:04 +01:00
dm-cache-block-types.h
…
dm-cache-metadata.c
dm cache: Remove unused dm_cache_size
2024-11-20 11:38:04 +01:00
dm-cache-metadata.h
dm cache: Remove unused dm_cache_size
2024-11-20 11:38:04 +01:00
dm-cache-policy-internal.h
…
dm-cache-policy-smq.c
dm: use vmalloc_array() to simplify code
2025-08-19 11:12:50 +02:00
dm-cache-policy.c
…
dm-cache-policy.h
…
dm-cache-target.c
dm cache: support shrinking the origin device
2025-03-06 16:13:47 +01:00
dm-clone-metadata.c
dm: Make use of __assign_bit() API
2024-09-02 16:53:53 +02:00
dm-clone-metadata.h
…
dm-clone-target.c
block: add a bdev_limits helper
2024-10-29 09:15:00 -06:00
dm-core.h
dm: optimize REQ_PREFLUSH with data when using the linear target
2025-09-18 12:58:02 +02:00
dm-crypt.c
Merge tag 'for-6.17/block-20250728' of git://git.kernel.dk/linux
2025-07-28 16:43:54 -07:00
dm-delay.c
treewide, timers: Rename from_timer() to timer_container_of()
2025-06-08 09:07:37 +02:00
dm-dust.c
dm: Allow .prepare_ioctl to handle ioctls directly
2025-05-04 11:35:05 +02:00
dm-ebs-target.c
dm-ebs: Mark full buffer dirty even on partial write
2026-01-08 10:17:02 +01:00
dm-era-target.c
dm: Constify struct dm_block_validator
2024-07-19 12:08:15 +02:00
dm-exception-store.c
…
dm-exception-store.h
dm-snapshot: fix 'scheduling while atomic' on real-time kernels
2026-01-17 16:35:16 +01:00
dm-flakey.c
block: add a bio_init_inline helper
2025-09-09 07:31:59 -06:00
dm-ima.c
dm-ima: drop a useless argument
2025-08-19 11:12:50 +02:00
dm-ima.h
…
dm-init.c
dm init: Handle minors larger than 255
2024-07-02 20:53:41 +02:00
dm-integrity.c
Merge tag 'for-6.18/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2025-10-03 18:48:02 -07:00
dm-io-rewind.c
…
dm-io-tracker.h
…
dm-io.c
dm-io: Warn on creating multiple atomic write bios for a region
2025-01-17 22:24:09 +01:00
dm-ioctl.c
dm mpath: Interface for explicit probing of active paths
2025-05-04 11:35:06 +02:00
dm-kcopyd.c
dm io: Support IO priority
2024-02-20 14:22:51 -05:00
dm-linear.c
mm: remove callers of pfn_t functionality
2025-07-09 22:42:19 -07:00
dm-log-userspace-base.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-log-userspace-transfer.c
…
dm-log-userspace-transfer.h
…
dm-log-writes.c
dm log-writes: Add missing set_freezable() for freezable kthread
2025-12-18 14:03:40 +01:00
dm-log.c
dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list
2024-02-20 14:22:55 -05:00
dm-mpath.c
treewide, timers: Rename from_timer() to timer_container_of()
2025-06-08 09:07:37 +02:00
dm-mpath.h
…
dm-path-selector.c
dm-mpath: make dm_unregister_path_selector return void
2025-06-30 16:20:04 +02:00
dm-path-selector.h
dm-mpath: make dm_unregister_path_selector return void
2025-06-30 16:20:04 +02:00
dm-ps-historical-service-time.c
dm-mpath: don't print the "loaded" message if registering fails
2025-06-30 16:20:17 +02:00
dm-ps-io-affinity.c
dm-mpath: make dm_unregister_path_selector return void
2025-06-30 16:20:04 +02:00
dm-ps-queue-length.c
dm-mpath: don't print the "loaded" message if registering fails
2025-06-30 16:20:17 +02:00
dm-ps-round-robin.c
dm-mpath: don't print the "loaded" message if registering fails
2025-06-30 16:20:17 +02:00
dm-ps-service-time.c
dm-mpath: don't print the "loaded" message if registering fails
2025-06-30 16:20:17 +02:00
dm-raid1.c
treewide, timers: Rename from_timer() to timer_container_of()
2025-06-08 09:07:37 +02:00
dm-raid.c
dm-raid: fix possible NULL dereference with undefined raid type
2025-12-18 14:03:40 +01:00
dm-region-hash.c
dm: use vmalloc_array() to simplify code
2025-08-19 11:12:50 +02:00
dm-rq.c
dm: use generic functions instead of disable_discard and disable_write_zeroes
2025-05-04 11:35:05 +02:00
dm-rq.h
…
dm-snap-persistent.c
dm io: Support IO priority
2024-02-20 14:22:51 -05:00
dm-snap-transient.c
…
dm-snap.c
dm-snapshot: fix 'scheduling while atomic' on real-time kernels
2026-01-17 16:35:16 +01:00
dm-stats.c
dm stats: limit the number of entries
2024-01-30 14:06:44 -05:00
dm-stats.h
…
dm-stripe.c
dm-stripe: fix a possible integer overflow
2025-08-11 13:17:32 +02:00
dm-switch.c
dm: use vmalloc_array() to simplify code
2025-08-19 11:12:50 +02:00
dm-sysfs.c
…
dm-table.c
Merge tag 'for-6.17/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2025-08-04 08:58:53 -07:00
dm-target.c
dm error: mark as DM_TARGET_PASSES_INTEGRITY
2025-08-19 11:12:50 +02:00
dm-thin-metadata.c
dm: Constify struct dm_block_validator
2024-07-19 12:08:15 +02:00
dm-thin-metadata.h
…
dm-thin.c
dm: use vmalloc_array() to simplify code
2025-08-19 11:12:50 +02:00
dm-uevent.c
…
dm-uevent.h
…
dm-unstripe.c
dm-unstriped: cast an operand to sector_t to prevent potential uint32_t overflow
2024-11-04 17:34:56 +01:00
dm-verity-fec.c
dm-verity: disable recursive forward error correction
2026-01-17 16:35:16 +01:00
dm-verity-fec.h
dm-verity: disable recursive forward error correction
2026-01-17 16:35:16 +01:00
dm-verity-loadpin.c
dm: verity-loadpin: Add NULL pointer check for 'bdev' parameter
2023-06-28 10:43:04 -07:00
dm-verity-target.c
dm-verity: disable recursive forward error correction
2026-01-17 16:35:16 +01:00
dm-verity-verify-sig.c
dm-verity: fix a memory leak if some arguments are specified multiple times
2025-06-03 19:01:42 +02:00
dm-verity-verify-sig.h
…
dm-verity.h
dm-verity: remove support for asynchronous hashes
2025-07-31 15:39:55 +02:00
dm-writecache.c
mm: remove callers of pfn_t functionality
2025-07-09 22:42:19 -07:00
dm-zero.c
dm: always manage discard support in terms of max_hw_discard_sectors
2024-05-20 15:51:19 -04:00
dm-zone.c
dm: Remove unnecessary return in dm_zone_endio()
2025-06-27 12:59:11 +02:00
dm-zoned-metadata.c
dm: zoned: Remove unused functions
2024-11-20 11:38:04 +01:00
dm-zoned-reclaim.c
dm: Fix dm-zoned-reclaim zone write pointer alignment
2024-12-10 09:15:33 -07:00
dm-zoned-target.c
md: dm-zoned-target: Initialize return variable r to avoid uninitialized use
2025-07-31 15:39:55 +02:00
dm-zoned.h
dm: zoned: Remove unused functions
2024-11-20 11:38:04 +01:00
dm.c
dm: fix failure when empty flush's bi_sector points beyond the device end
2025-11-20 19:50:42 +01:00
dm.h
dm: limit swapping tables for devices with zone write plugs
2025-05-04 11:35:05 +02:00
Kconfig
Merge tag 'for-6.18/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2025-10-03 18:48:02 -07:00
Makefile
Merge tag 'for-6.18/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2025-10-03 18:48:02 -07:00
md-autodetect.c
md: reintroduce md-linear
2025-01-13 07:36:29 -08:00
md-bitmap.c
md/md-llbitmap: introduce new lockless bitmap
2025-09-06 17:27:51 +08:00
md-bitmap.h
md/md-llbitmap: introduce new lockless bitmap
2025-09-06 17:27:51 +08:00
md-cluster.c
Merge tag 'for-6.18/block-20250929' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
2025-10-02 10:16:56 -07:00
md-cluster.h
md: switch md-cluster to use md_submodle_head
2025-03-05 00:28:39 +08:00
md-linear.c
Merge tag 'for-6.18/block-20250929' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
2025-10-02 10:16:56 -07:00
md-llbitmap.c
md/md-llbitmap: Use DIV_ROUND_UP_SECTOR_T
2025-09-10 18:18:41 -06:00
md.c
md: Fix static checker warning in analyze_sbs
2026-01-08 10:16:51 +01:00
md.h
md: avoid repeated calls to del_gendisk
2025-12-18 14:02:53 +01:00
raid0.c
Merge tag 'for-6.18/block-20250929' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
2025-10-02 10:16:56 -07:00
raid0.h
md/raid0: add discard support for the 'original' layout
2023-06-30 15:43:50 -07:00
raid1-10.c
md/md-bitmap: add md_bitmap_registered/enabled() helper
2025-09-06 17:11:45 +08:00
raid1.c
Merge tag 'for-6.18/block-20250929' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
2025-10-02 10:16:56 -07:00
raid1.h
md/raid1: convert to use bio_submit_split_bioset()
2025-09-10 05:23:45 -06:00
raid5-cache.c
lib/crc32: standardize on crc32c() name for Castagnoli CRC32
2025-02-08 20:06:30 -08:00
raid5-log.h
…
raid5-ppl.c
md: rename recovery_cp to resync_offset
2025-07-31 01:26:04 +08:00
raid5.c
md/raid5: fix possible null-pointer dereferences in raid5_store_group_thread_cnt()
2026-01-08 10:16:51 +01:00
raid5.h
md/md-bitmap: move bitmap_{start, end}write to md upper layer
2025-01-13 08:56:11 -08:00
raid10.c
Merge tag 'for-6.18/block-20250929' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
2025-10-02 10:16:56 -07:00
raid10.h
md/raid10: add a new r10bio flag R10BIO_Returned
2025-09-10 05:23:45 -06:00