FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit bbb1e52402b2a288b09ae37e8182599931c7e9df ("drm/fb-helper: atomic restore_fbdev_mode()..")


[   84.266719] ata5: SATA max UDMA/133 cmd 0xf0b0 ctl 0xf0a0 bmdma 0xf070 irq 20
[   84.273944] ata6: SATA max UDMA/133 cmd 0xf090 ctl 0xf080 bmdma 0xf078 irq 20
[   84.281219] ------------[ cut here ]------------
[   84.285940] WARNING: CPU: 0 PID: 158 at drivers/gpu/drm/drm_drv.c:569 drm_dev_alloc+0x257/0x320 [drm]()
[   84.297247] Modules linked in: x86_pkg_temp_thermal coretemp kvm_intel eeepc_wmi asus_wmi snd_hda_intel(+) kvm snd_hda_codec crct10dif_pclmul crc32_pclmul crc32c_intel snd_hda_core i915(+) snd_hwdep ghash_clmulni_intel drm_kms_helper sparse_keymap aesni_intel rfkill lrw syscopyarea gf128mul glue_helper ppdev sysfillrect sysimgblt snd_pcm fb_sys_fops pcspkr ablk_helper cryptd ata_piix microcode pata_via i2c_i801 serio_raw snd_timer snd soundcore libata drm shpchp wmi parport_pc parport tpm_infineon video
[   84.344750] CPU: 0 PID: 158 Comm: systemd-udevd Not tainted 4.2.0-rc8-01442-gbbb1e52 #1
[   84.352838] Hardware name: System manufacturer System Product Name/P8H67-M PRO, BIOS 1002 04/01/2011
[   84.362069]  ffffffffa009d370 ffff8801bd7939e8 ffffffff8189e2e9 ffff8801bfa11578
[   84.369783]  0000000000000000 ffff8801bd793a28 ffffffff8107348a ffff8801bd793a38
[   84.377497]  ffff88009a45f800 0000000000000000 ffffffffa0420100 ffffffffa0420100
[   84.385214] Call Trace:
[   84.387740]  [<ffffffff8189e2e9>] dump_stack+0x4c/0x65
[   84.392958]  [<ffffffff8107348a>] warn_slowpath_common+0x8a/0xc0
[   84.399036]  [<ffffffff8107357a>] warn_slowpath_null+0x1a/0x20
[   84.404946]  [<ffffffffa006f647>] drm_dev_alloc+0x257/0x320 [drm]
[   84.411129]  [<ffffffffa0071ddb>] drm_get_pci_dev+0x3b/0x1e0 [drm]
[   84.417400]  [<ffffffffa0335234>] i915_pci_probe+0x34/0x50 [i915]
[   84.423569]  [<ffffffff81442925>] local_pci_probe+0x45/0xa0
[   84.429215]  [<ffffffff81443bae>] ? pci_match_device+0xfe/0x120
[   84.435226]  [<ffffffff81443cd7>] pci_device_probe+0xc7/0x120
[   84.441045]  [<ffffffff81545dd6>] driver_probe_device+0x1f6/0x460
[   84.447218]  [<ffffffff815460d0>] __driver_attach+0x90/0xa0
[   84.452863]  [<ffffffff81546040>] ? driver_probe_device+0x460/0x460
[   84.459203]  [<ffffffff81543ad4>] bus_for_each_dev+0x64/0xa0
[   84.464934]  [<ffffffff815457ae>] driver_attach+0x1e/0x20
[   84.470406]  [<ffffffff81545321>] bus_add_driver+0x1f1/0x290
[   84.476140]  [<ffffffff81546ab0>] driver_register+0x60/0xe0
[   84.482445]  [<ffffffff814421bc>] __pci_register_driver+0x4c/0x50
[   84.488622]  [<ffffffffa0072060>] drm_pci_init+0xe0/0x110 [drm]
[   84.494644]  [<ffffffffa024a000>] ? 0xffffffffa024a000
[   84.499880]  [<ffffffffa024a0a7>] i915_init+0xa7/0xaf [i915]
[   84.505621]  [<ffffffff81002123>] do_one_initcall+0xb3/0x1d0
[   84.511368]  [<ffffffff811bf8a4>] ? kmem_cache_alloc_trace+0x1b4/0x220
[   84.517983]  [<ffffffff8189afea>] ? do_init_module+0x28/0x1ea
[   84.523810]  [<ffffffff8189b023>] do_init_module+0x61/0x1ea
[   84.529466]  [<ffffffff810f8bdc>] load_module+0x213c/0x2580
[   84.535129]  [<ffffffff810f4cf0>] ? __symbol_put+0x40/0x40
[   84.540696]  [<ffffffff810f9220>] SyS_finit_module+0x80/0xb0
[   84.546437]  [<ffffffff818a5e2e>] entry_SYSCALL_64_fastpath+0x12/0x71
[   84.552973] ---[ end trace d6e6606f1bc7d8ea ]---
--


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Ying Huang