Jan  1 01:00:37 Cubian kernel: [   10.290277] ------------[ cut here ]------------
Jan  1 01:00:37 Cubian kernel: [   10.290475] WARNING: CPU: 0 PID: 202 at drivers/spi/spidev.c:730 spidev_probe+0x1a0/0x1bc [spidev]()
Jan  1 01:00:37 Cubian kernel: [   10.290733] Modules linked in: spidev(+) spi_sun4i
Jan  1 01:00:37 Cubian kernel: [   10.290921] CPU: 0 PID: 202 Comm: systemd-udevd Not tainted 4.1.0-rc1-mripard-68733-g4ab66f8-dirty #2
Jan  1 01:00:37 Cubian kernel: [   10.291169] Hardware name: Allwinner sun7i (A20) Family
Jan  1 01:00:37 Cubian kernel: [   10.291354] [<c00150ac>] (unwind_backtrace) from [<c0012444>] (show_stack+0x10/0x14)
Jan  1 01:00:37 Cubian kernel: [   10.291580] [<c0012444>] (show_stack) from [<c069c030>] (dump_stack+0x88/0x98)
Jan  1 01:00:37 Cubian kernel: [   10.291791] [<c069c030>] (dump_stack) from [<c00227d8>] (warn_slowpath_common+0x84/0xb4)
Jan  1 01:00:37 Cubian kernel: [   10.292052] [<c00227d8>] (warn_slowpath_common) from [<c00228a4>] (warn_slowpath_null+0x1c/0x24)
Jan  1 01:00:37 Cubian kernel: [   10.292302] [<c00228a4>] (warn_slowpath_null) from [<bf0042fc>] (spidev_probe+0x1a0/0x1bc [spidev])
Jan  1 01:00:37 Cubian kernel: [   10.292563] [<bf0042fc>] (spidev_probe [spidev]) from [<c04744a8>] (spi_drv_probe+0x50/0x74)
Jan  1 01:00:37 Cubian kernel: [   10.292802] [<c04744a8>] (spi_drv_probe) from [<c03ecc78>] (driver_probe_device+0x174/0x2b4)
Jan  1 01:00:37 Cubian kernel: [   10.293040] [<c03ecc78>] (driver_probe_device) from [<c03ece88>] (__driver_attach+0x8c/0x90)
Jan  1 01:00:37 Cubian kernel: [   10.293276] [<c03ece88>] (__driver_attach) from [<c03eb1c4>] (bus_for_each_dev+0x6c/0xa0)
Jan  1 01:00:37 Cubian kernel: [   10.293505] [<c03eb1c4>] (bus_for_each_dev) from [<c03ec424>] (bus_add_driver+0x148/0x1f0)
Jan  1 01:00:37 Cubian kernel: [   10.293735] [<c03ec424>] (bus_add_driver) from [<c03ed264>] (driver_register+0x78/0xf8)
Jan  1 01:00:37 Cubian kernel: [   10.293962] [<c03ed264>] (driver_register) from [<bf007088>] (spidev_init+0x88/0xc0 [spidev])
Jan  1 01:00:37 Cubian kernel: [   10.294206] [<bf007088>] (spidev_init [spidev]) from [<c0009780>] (do_one_initcall+0x9c/0x1f8)
Jan  1 01:00:37 Cubian kernel: [   10.294448] [<c0009780>] (do_one_initcall) from [<c0699f80>] (do_init_module+0x5c/0x1a8)
Jan  1 01:00:37 Cubian kernel: [   10.294695] [<c0699f80>] (do_init_module) from [<c008328c>] (load_module+0x1870/0x1cf8)
Jan  1 01:00:37 Cubian kernel: [   10.294974] [<c008328c>] (load_module) from [<c008389c>] (SyS_finit_module+0x68/0x78)
Jan  1 01:00:37 Cubian kernel: [   10.295229] [<c008389c>] (SyS_finit_module) from [<c000f300>] (ret_fast_syscall+0x0/0x34)
Jan  1 01:00:37 Cubian kernel: [   10.295462] ---[ end trace d4bf8399c35389b7 ]---