Increase LOCKDEP_CIRCULAR_QUEUE_BITS to avoid this warning:
------------[ cut here ]------------
lockdep bfs error:-1
WARNING: kernel/locking/lockdep.c:2103 at print_bfs_bug+0x20/0x40 kernel/locking/lockdep.c:2103, CPU#1: syz-executor/5603
Modules linked in:
CPU: 1 UID: 0 PID: 5603 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:print_bfs_bug+0x22/0x40 kernel/locking/lockdep.c:2103
Code: 90 90 90 90 90 90 90 90 55 53 89 fb e8 c7 0e 35 03 89 c5 e8 e0 85 ff ff 85 ed 74 13 83 fb ff 74 16 48 8d 3d a0 f6 34 0f 89 de <67> 48 0f b9 3a 5b 5d e9 c2 33 d3 09 cc 48 c7 c7 1a e4 c7 8d e8 b5
RSP: 0018:ffffc90004b2f398 EFLAGS: 00010046
RAX: 000000000000003b RBX: 00000000ffffffff RCX: 1c9f2b0ba37d4900
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff90d81bb0
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000965e25 R12: 0000000000000033
R13: ffffffff9480b550 R14: ffffffff977e27d8 R15: ffffffff977e3c68
FS:  000055556fc4d500(0000) GS:ffff888124827000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f30d065da08 CR3: 000000004114e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 check_irq_usage kernel/locking/lockdep.c:-1 [inline]
 check_prev_add kernel/locking/lockdep.c:3213 [inline]
 check_prevs_add kernel/locking/lockdep.c:3328 [inline]
 validate_chain kernel/locking/lockdep.c:3952 [inline]
 __lock_acquire+0x25ed/0x2de0 kernel/locking/lockdep.c:5288
 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
 __raw_spin_lock include/linux/spinlock_api_smp.h:190 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:173
 class_raw_spinlock_constructor include/linux/spinlock.h:559 [inline]
 __hrtimer_rearm_deferred+0x99/0x4d0 kernel/time/hrtimer.c:2189
 hrtick_schedule_exit+0x1c7/0x2b0 kernel/sched/core.c:1023
 __schedule+0x1cbd/0x56e0 kernel/sched/core.c:7386
 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
 irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947
Code: ff ff ff e8 00 af cf 09 f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 e2 c8 2c 12 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 7f 91 d3 09 cc 48 8d 3d 57 4e 35
RSP: 0018:ffffc90004b2f948 EFLAGS: 00000286
RAX: 1c9f2b0ba37d4900 RBX: 0000000000000001 RCX: 0000000000000046
RDX: ffff8880394bcac0 RSI: ffffffff8dd69d50 RDI: ffffffff8bed1980
RBP: ffff8880394bbe80 R08: 0000000000000008 R09: ffffffff970507c8
R10: 00000000300db431 R11: 00000000f03cde5d R12: ffff888033fdf140
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000246
 touch_wq_lockdep_map+0xcb/0x180 kernel/workqueue.c:4272
 __flush_workqueue+0x148/0x10b0 kernel/workqueue.c:4314
 close_ctree+0x3f4/0x1200 fs/btrfs/disk-io.c:4450
 generic_shutdown_super+0x13d/0x2d0 fs/super.c:751
 kill_anon_super+0x3b/0x70 fs/super.c:1355
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2139
 deactivate_locked_super+0xbe/0x110 fs/super.c:586
 cleanup_mnt+0x204/0x2a0 fs/namespace.c:1396
 task_work_run+0x1d9/0x260 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x204/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
 do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc376150797
Code: a2 c7 05 5c 9f 25 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffc049e78a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc3761e5f63 RCX: 00007fc376150797
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc049e7960
RBP: 00007ffc049e7960 R08: 00007ffc049e8960 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc049e89f0
R13: 00007fc3761e5f63 R14: 0000000000157c58 R15: 00007ffc049e8a30
 </TASK>
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	55                   	push   %rbp
   9:	53                   	push   %rbx
   a:	89 fb                	mov    %edi,%ebx
   c:	e8 c7 0e 35 03       	call   0x3350ed8
  11:	89 c5                	mov    %eax,%ebp
  13:	e8 e0 85 ff ff       	call   0xffff85f8
  18:	85 ed                	test   %ebp,%ebp
  1a:	74 13                	je     0x2f
  1c:	83 fb ff             	cmp    $0xffffffff,%ebx
  1f:	74 16                	je     0x37
  21:	48 8d 3d a0 f6 34 0f 	lea    0xf34f6a0(%rip),%rdi        # 0xf34f6c8
  28:	89 de                	mov    %ebx,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	5b                   	pop    %rbx
  30:	5d                   	pop    %rbp
  31:	e9 c2 33 d3 09       	jmp    0x9d333f8
  36:	cc                   	int3
  37:	48 c7 c7 1a e4 c7 8d 	mov    $0xffffffff8dc7e41a,%rdi
  3e:	e8                   	.byte 0xe8
  3f:	b5                   	.byte 0xb5