[   16.041378] ------------[ cut here ]------------
[   16.041383] WARNING: CPU: 0 PID: 2377 at drivers/gpu/drm/drm_ioctl.c:143 drm_setversion+0x176/0x180()
[   16.041439] No drm_driver.set_busid() implementation provided by nvidia_frontend_exit_module [nvidia]. Use drm_dev_set_unique() to set the unique name explicitly.
[   16.041449] Modules linked in:
[   16.041450]  nvidia(PO)
[   16.041453] CPU: 0 PID: 2377 Comm: Xorg Tainted: P           O   3.19.0-gentoo #3
[   16.041454] Hardware name: Gigabyte Technology Co., Ltd. GA-78LMT-USB3/GA-78LMT-USB3, BIOS FA 04/23/2013
[   16.041455]  ffffffff81c30e4b ffff880513517cc8 ffffffff81854bb6 0000000000000073
[   16.041457]  ffff880513517d18 ffff880513517d08 ffffffff8104e3e0 ffff880516fbe2a0
[   16.041459]  ffff880513517df8 ffff880516aa3000 ffff8800cb053f00 ffff880516aa3000
[   16.041461] Call Trace:
[   16.041465]  [<ffffffff81854bb6>] dump_stack+0x45/0x57
[   16.041468]  [<ffffffff8104e3e0>] warn_slowpath_common+0x90/0xd0
[   16.041469]  [<ffffffff8104e461>] warn_slowpath_fmt+0x41/0x50
[   16.041471]  [<ffffffff8149a836>] drm_setversion+0x176/0x180
[   16.041474]  [<ffffffff81178ab0>] ? path_openat+0xa0/0x650
[   16.041476]  [<ffffffff8149a264>] drm_ioctl+0x2e4/0x630
[   16.041477]  [<ffffffff8149a6c0>] ? drm_noop+0x30/0x30
[   16.041479]  [<ffffffff8117aaae>] ? do_filp_open+0x3e/0xa0
[   16.041481]  [<ffffffff8117cef0>] do_vfs_ioctl+0x2e0/0x4e0
[   16.041484]  [<ffffffff8136da1f>] ? file_has_perm+0x8f/0xa0
[   16.041485]  [<ffffffff8117d179>] SyS_ioctl+0x89/0xa0
[   16.041487]  [<ffffffff8185d012>] system_call_fastpath+0x12/0x17
[   16.041489] ---[ end trace d8fc63297e20d1e3 ]---