Backtrace

WARNING: CPU: 2 PID: 155 at kernel/workqueue.c:2598 check_flush_dependency+0xa0/0x130
Modules linked in: snd_seq_dummy thunderbolt uinput rfcomm xt_nat veth nf_conntrack_netlink xt_addrtype br_netfilter ccm xt_CHECKSUM xt_MASQUERADE nf_nat_tftp nf_conntrack_tftp tun bridge stp llc nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_REJECT nf_reject_ipv6 ip6t_rpfilter ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c ip_set nfnetlink ebtable_filter ebtables overlay ip6table_filter ip6_tables iptable_filter cmac bnep sunrpc vfat fat btusb btrtl btbcm btintel bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common ecdh_generic ecc snd_hda_codec_hdmi hid_multitouch snd_soc_skl x86_pkg_temp_thermal snd_soc_hdac_hda intel_powerclamp coretemp kvm_intel snd_hda_ext_core snd_soc_skl_ipc snd_soc_sst_ipc kvm snd_soc_sst_dsp snd_soc_acpi_intel_match
 snd_soc_acpi snd_soc_core ath10k_pci ath10k_core mei_wdt mei_hdcp iTCO_wdt iTCO_vendor_support snd_hda_codec_realtek intel_rapl_msr snd_hda_codec_generic mac80211 irqbypass snd_compress ac97_bus snd_pcm_dmaengine snd_hda_intel dell_laptop crct10dif_pclmul crc32_pclmul ledtrig_audio snd_hda_codec ghash_clmulni_intel ath intel_cstate intel_uncore snd_hda_core intel_rapl_perf snd_hwdep snd_seq dell_wmi snd_seq_device dell_smbios dcdbas snd_pcm cfg80211 joydev intel_wmi_thunderbolt snd_timer wmi_bmof dell_wmi_descriptor rtsx_pci_ms snd mei_me i2c_i801 idma64 memstick intel_xhci_usb_role_switch rfkill soundcore roles mei intel_lpss_pci libarc4 intel_pch_thermal processor_thermal_device ucsi_acpi intel_lpss intel_rapl_common typec_ucsi intel_soc_dts_iosf typec intel_vbtn soc_button_array int3400_thermal intel_hid int3403_thermal acpi_thermal_rel int340x_thermal_zone sparse_keymap acpi_pad v4l2loopback_dc(OE) videodev mc ip_tables i915 rtsx_pci_sdmmc i2c_algo_bit drm_kms_helper
 mmc_core nvme rtsx_pci drm serio_raw nvme_core crc32c_intel wmi i2c_hid video pinctrl_sunrisepoint pinctrl_intel fuse
CPU: 2 PID: 155 Comm: kswapd0 Tainted: G           OE     5.3.7-301.fc31.x86_64 #1
Hardware name: Dell Inc. XPS 13 9360/05HM5Y, BIOS 2.4.2 11/21/2017
RIP: 0010:check_flush_dependency+0xa0/0x130
Code: 8d 8a 18 07 00 00 49 89 e8 48 8d 8b b0 00 00 00 4c 89 ca 48 c7 c7 28 0c 13 b7 48 89 04 24 c6 05 83 2c 44 01 01 e8 9e 2b fe ff <0f> 0b 48 8b 04 24 eb 10 4c 89 e7 e8 80 81 00 00 41 f6 44 24 25 08
RSP: 0018:ffffac56401f38d0 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffff9c08f500ae00 RCX: 0000000000000000
RDX: 0000000000000063 RSI: ffffffffb7be7883 RDI: 0000000000000046
RBP: ffffffffc0617780 R08: 0002a2c7acb99ccc R09: 0000000000000063
R10: ffffffffb7be7c00 R11: 00000000b7be786b R12: ffff9c08f4593f80
R13: ffff9c08f63ad700 R14: 0000000000000001 R15: 0000000000000013
FS:  0000000000000000(0000) GS:ffff9c08f6300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fae442e9000 CR3: 000000014c6be003 CR4: 00000000003606e0
Call Trace:
 __flush_work+0x92/0x1c0
 __cancel_work_timer+0x107/0x190
 ? _cond_resched+0x15/0x30
 ? synchronize_irq+0x3a/0xa0
 ? _raw_spin_lock_irqsave+0x32/0x40
 ? fwtable_write32+0x4c/0x210 [i915]
 gen6_disable_rps_interrupts+0x7f/0xa0 [i915]
 gen6_rps_idle+0x1a/0xe0 [i915]
 intel_gt_park+0x54/0x60 [i915]
 __intel_wakeref_put_last+0x17/0x50 [i915]
 __engine_park+0xbc/0xd0 [i915]
 __intel_wakeref_put_last+0x17/0x50 [i915]
 i915_request_retire+0x1aa/0x370 [i915]
 ring_retire_requests+0x4e/0x60 [i915]
 i915_retire_requests+0x43/0x80 [i915]
 i915_gem_shrink+0xd3/0x510 [i915]
 i915_gem_shrinker_scan+0x63/0x110 [i915]
 do_shrink_slab+0x154/0x2c0
 shrink_slab+0xac/0x2b0
 shrink_node+0xf5/0x490
 balance_pgdat+0x2db/0x530
 kswapd+0x1fb/0x3c0
 ? finish_wait+0x80/0x80
 kthread+0xfb/0x130
 ? balance_pgdat+0x530/0x530
 ? kthread_park+0x80/0x80
 ret_from_fork+0x35/0x40