使用WARN_ON来追溯函数的调用关系


[    6.660489] spidev spi32766.1: buggy DT: spidev listed directly in DT

[    6.666878] ------------[ cut here ]------------

[    6.671443] WARNING: at /home/cctv/YOCTO/poky/build/tmp/work-shared/zynqmp/kernel-source/drivers/spi/spidev.c:9

[    6.682906] Modules linked in:

[    6.685935]

[    6.687415] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W       4.4.0-xilinx #1

[    6.695057] Hardware name: ZynqMP (DT)

[    6.699392] task: ffffffc87b878b80 ti: ffffffc87b87c000 task.ti: ffffffc87b87c000

[    6.706866] PC is at spidev_probe+0x1a0/0x1c0

[    6.711198] LR is at spidev_probe+0x19c/0x1c0

[    6.715537] pc : [<ffffffc000521ac0>] lr : [<ffffffc000521abc>] pstate: 60000045

[    6.722920] sp : ffffffc87b87f980

[    6.726212] x29: ffffffc87b87f980 x28: 0000000000000000

[    6.731505] x27: ffffffc000a5eed0 x26: 0000000000000000

[    6.736800] x25: 0000000000000000 x24: ffffffc000b2b000

[    6.742095] x23: 0000000000000000 x22: ffffffc000acdcf0

[    6.747390] x21: ffffffc0732bec00 x20: ffffffc0732bec00

[    6.752684] x19: ffffffc0007efc90 x18: ffffffc080af75f7

[    6.757979] x17: 0000000000000001 x16: 00000000fa83b2da

[    6.763274] x15: ffffffc000af7605 x14: 0000000000010000

[    6.768569] x13: ffffffc000b09a30 x12: 0000000000000000

[    6.773864] x11: 0101010101010101 x10: 7f7f7f7f7f7f7f7f

[    6.779158] x9 : 5400feff02fefeff x8 : 7f7f7f7f7f7f7f7f

[    6.784453] x7 : 01fefefefefefeff x6 : 8080808080808000

[    6.789748] x5 : 0080808080808080 x4 : 0000000000000000

[    6.795043] x3 : ffffffc0007efe20 x2 : 0000000000001f6a

[    6.800337] x1 : 0000000000000040 x0 : 0000000000000000

[    6.805632]

[    6.807109] ---[ end trace 0327f05f6a94bd54 ]---

[    6.811710] Call trace:

[    6.814142] [<ffffffc000521ac0>] spidev_probe+0x1a0/0x1c0

[    6.819525] [<ffffffc00051f0a0>] spi_drv_probe+0x58/0x78

[    6.824820] [<ffffffc0004bc8d0>] really_probe+0x198/0x298

[    6.830201] [<ffffffc0004bcb14>] __device_attach_driver+0x9c/0xd8

[    6.836277] [<ffffffc0004babe0>] bus_for_each_drv+0x58/0x98

[    6.841832] [<ffffffc0004bc6d4>] __device_attach+0xb4/0x100

[    6.847387] [<ffffffc0004bcbf0>] device_initial_probe+0x10/0x18

[    6.853290] [<ffffffc0004bbbec>] bus_probe_device+0x94/0xa0

[    6.858845] [<ffffffc0004b9b84>] device_add+0x33c/0x520

[    6.864053] [<ffffffc00051f644>] spi_add_device+0xe4/0x1a8

[    6.869522] [<ffffffc0005212bc>] spi_register_master+0x57c/0x748

[    6.875511] [<ffffffc0005234b0>] cdns_spi_probe+0x2f0/0x370

[    6.881067] [<ffffffc0004be138>] platform_drv_probe+0x38/0x88

[    6.886795] [<ffffffc0004bc8d0>] really_probe+0x198/0x298

[    6.892176] [<ffffffc0004bca74>] __driver_attach+0xa4/0xa8

[    6.897644] [<ffffffc0004bab20>] bus_for_each_dev+0x60/0xa0

[    6.903200] [<ffffffc0004bc288>] driver_attach+0x20/0x28

[    6.908494] [<ffffffc0004bbee0>] bus_add_driver+0x1d0/0x238

[    6.914050] [<ffffffc0004bd030>] driver_register+0x60/0xf8

[    6.919519] [<ffffffc0004be0f8>] __platform_driver_register+0x40/0x48

[    6.925942] [<ffffffc000a3ab34>] cdns_spi_driver_init+0x18/0x20

[    6.931844] [<ffffffc000082190>] do_one_initcall+0x90/0x1a0

[    6.937400] [<ffffffc000a16ac0>] kernel_init_freeable+0x150/0x1f0

[    6.943477] [<ffffffc000760f50>] kernel_init+0x10/0xe0

[    6.948596] [<ffffffc000085410>] ret_from_fork+0x10/0x40