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BUG: KCSAN: data-race in blk_mq_run_hw_queue / blk_mq_sched_dispatch_requests

read to 0xffff888129a7b010 of 8 bytes by interrupt on cpu 1:
 list_empty_careful include/linux/list.h:287 [inline]
 blk_mq_hctx_has_pending block/blk-mq.c:69 [inline]
 blk_mq_run_hw_queue+0x11a/0x1c0 block/blk-mq.c:1504
 blk_mq_run_hw_queues+0xac/0xf0 block/blk-mq.c:1525
 scsi_end_request+0x3bd/0x3e0 drivers/scsi/scsi_lib.c:619
 scsi_io_completion+0x11d/0xc80 drivers/scsi/scsi_lib.c:963
 scsi_finish_command+0x280/0x380 drivers/scsi/scsi.c:228
 scsi_softirq_done+0x259/0x280 drivers/scsi/scsi_lib.c:1477
 blk_done_softirq+0x1eb/0x250 block/blk-softirq.c:37
 __do_softirq+0x115/0x33f kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0xbb/0xe0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 do_IRQ+0xa6/0x180 arch/x86/kernel/irq.c:263
 ret_from_intr+0x0/0x19
 __sanitizer_cov_trace_pc+0x1/0x50 kernel/kcov.c:95
 __lru_cache_add+0x40/0x1d0 mm/swap.c:402
 lru_cache_add_anon+0x9e/0x130 mm/swap.c:418

write to 0xffff888129a7b010 of 8 bytes by task 2494 on cpu 0:
 INIT_LIST_HEAD include/linux/list.h:29 [inline]
 list_splice_init include/linux/list.h:451 [inline]
 blk_mq_sched_dispatch_requests+0x239/0x380 block/blk-mq-sched.c:190
 __blk_mq_run_hw_queue+0xb7/0x160 block/blk-mq.c:1403
 __blk_mq_delay_run_hw_queue+0x31b/0x3a0 block/blk-mq.c:1471
 blk_mq_run_hw_queue+0x103/0x1c0 block/blk-mq.c:1508
 blk_mq_run_hw_queues+0xac/0xf0 block/blk-mq.c:1525
 blk_mq_requeue_work+0x3a9/0x460 block/blk-mq.c:775
 process_one_work+0x3d4/0x890 kernel/workqueue.c:2269
 worker_thread+0xa0/0x800 kernel/workqueue.c:2415
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2494 Comm: kworker/0:1H Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: kblockd blk_mq_requeue_work
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