This one got backported to v5.10.65, and causes a warning on boot:
[ 7.114976] ------------[ cut here ]------------
[ 7.116811] WARNING: CPU: 0 PID: 1 at block/blk-mq.c:3045
blk_mq_release+0x84/0x114
[ 7.117510] Modules linked in:
[ 7.118593] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.10.65 #196
[ 7.118691] Hardware name: Generic DT based system
[ 7.119088] Backtrace:
[ 7.119675] [<8093aff0>] (dump_backtrace) from [<8093b294>]
(show_stack+0x20/0x24)
[ 7.120052] r7:00000009 r6:60000153 r5:00000000 r4:80e75938
[ 7.120223] [<8093b274>] (show_stack) from [<80940938>]
(dump_stack+0xc8/0xe4)
[ 7.120298] [<80940870>] (dump_stack) from [<80123174>] (__warn+0xe8/0x154)
[ 7.120355] r7:00000009 r6:00000be5 r5:804bc594 r4:80b53c80
[ 7.120415] [<8012308c>] (__warn) from [<8093b9b4>]
(warn_slowpath_fmt+0x6c/0xe4)
[ 7.120465] r7:00000009 r6:00000be5 r5:80b53c80 r4:00000000
[ 7.120537] [<8093b94c>] (warn_slowpath_fmt) from [<804bc594>]
(blk_mq_release+0x84/0x114)
[ 7.120594] r8:80b53c80 r7:857b7390 r6:00000001 r5:80ea6efd r4:00000000
[ 7.120656] [<804bc510>] (blk_mq_release) from [<804ad65c>]
(blk_release_queue+0xb8/0x128)
[ 7.120756] r9:00000001 r8:80eee400 r7:00000000 r6:857b7390
r5:00000001 r4:857b73d8
[ 7.120836] [<804ad5a4>] (blk_release_queue) from [<8052f87c>]
(kobject_put+0xc8/0x210)
[ 7.120891] r7:00000000 r6:00000000 r5:80e751bc r4:857b73d8
[ 7.120948] [<8052f7b4>] (kobject_put) from [<804a9b00>]
(blk_put_queue+0x1c/0x20)
[ 7.120998] r7:00000000 r6:857b3800 r5:00000000 r4:857b3860
[ 7.121055] [<804a9ae4>] (blk_put_queue) from [<804c2784>]
(disk_release+0xb0/0x118)
[ 7.121118] [<804c26d4>] (disk_release) from [<805f717c>]
(device_release+0x40/0xb4)
[ 7.121168] r7:00000000 r6:00000000 r5:00000000 r4:857b3860
[ 7.121224] [<805f713c>] (device_release) from [<8052f87c>]
(kobject_put+0xc8/0x210)
[ 7.121265] r5:80e81154 r4:857b3860
[ 7.121318] [<8052f7b4>] (kobject_put) from [<804c1c74>] (put_disk+0x24/0x28)
[ 7.121368] r7:ffffffea r6:00000008 r5:857b3800 r4:857bca00
[ 7.121440] [<804c1c50>] (put_disk) from [<806286f4>]
(nbd_dev_add+0x214/0x27c)
[ 7.121670] [<806284e0>] (nbd_dev_add) from [<80d22f80>]
(nbd_init+0xec/0x120)
[ 7.121740] r10:80ec7000 r9:80c06b34 r8:80d39834 r7:00000000
r6:80e82aa8 r5:00000009
[ 7.121777] r4:00000000
[ 7.121842] [<80d22e94>] (nbd_init) from [<80102364>]
(do_one_initcall+0x50/0x274)
[ 7.121893] r7:00000000 r6:00000007 r5:8116d180 r4:80d22e94
[ 7.121956] [<80102314>] (do_one_initcall) from [<80d012e8>]
(kernel_init_freeable+0x1b8/0x240)
[ 7.122005] r7:80d39854 r6:00000007 r5:8116d180 r4:80d5e788
[ 7.122067] [<80d01130>] (kernel_init_freeable) from [<80947bac>]
(kernel_init+0x18/0x130)
[ 7.122126] r10:00000000 r9:00000000 r8:00000000 r7:00000000
r6:00000000 r5:80947b94
[ 7.122161] r4:00000000
[ 7.122218] [<80947b94>] (kernel_init) from [<80100168>]
(ret_from_fork+0x14/0x2c)
[ 7.122413] Exception stack(0x810b7fb0 to 0x810b7ff8)
[ 7.122936] 7fa0: 00000000
00000000 00000000 00000000
[ 7.123287] 7fc0: 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
[ 7.123545] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 7.123728] r5:80947b94 r4:00000000
[ 7.124011] ---[ end trace d69e5842dc8c9352 ]---
There's been a bit going on in this driver since v5.10, so I assume
it's missing some dependent changes.
Cheers,
Joel