[Letux-kernel] letux 5.4 +pyra

H. Nikolaus Schaller hns at goldelico.com
Tue Dec 17 21:39:50 CET 2019


> Am 07.12.2019 um 23:06 schrieb Andreas Kemnade <andreas at kemnade.info>:
> 
> Hi,
> 
> I get this on the pyra. Is it just me or is there really something
> rotten with pyra and 5.4?

I now have got almost the same with 5.5-rc2. Hadn't tested yet on Pyra.

So there is something broken already in 5.4. Seems to be related to
serial_omap and/or hwmods.

Have to compare once again omap2plus_defconfig with letux_defconfig...

> 
> Regrads,
> Andreas
> 
> [    0.000000]   Normal zone: 196096 pages, LIFO batch:63
> [    0.000000]   HighMem zone: 323584 pages, LIFO batch:63
> [    0.000000] OMAP5432 ES2.0
> [    0.000000] percpu: Embedded 19 pages/cpu s49036 r8192 d20596 u77824
> [    0.000000] pcpu-alloc: s49036 r8192 d20596 u77824 alloc=19*4096
> [    0.000000] pcpu-alloc: [0] 0 [0] 1 
> [    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 518148
> [    0.000000] Kernel command line: root=PARTUUID=00000000-02 rw rootfstype=ext4 rootwait earlycon console=ttyO2,115200n8 coherent_pool=1M twl4030_charger.allow_usb=1 fsck.repair=yes rootwal
> [    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes, linear)
> [    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
> [    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
> [    0.000000] Memory: 2032544K/2078720K available (7061K kernel code, 679K rwdata, 2260K rodata, 1024K init, 366K bss, 29792K reserved, 16384K cma-reserved, 1277952K highmem)
> [    0.000000] rcu: Preemptible hierarchical RCU implementation.
> [    0.000000] rcu:     RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2.
> [    0.000000]  Tasks RCU enabled.
> [    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
> [    0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
> [    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
> [    0.000000] GIC: Using split EOI/Deactivate mode
> [    0.000000] random: get_random_bytes called from start_kernel+0x2c4/0x4c8 with crng_init=0
> [    0.000000] OMAP clockevent source: timer1 at 32768 Hz
> [    0.000000] arch_timer: cp15 timer(s) running at 6.14MHz (phys).
> [    0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x16ac02862, max_idle_ns: 440795202218 ns
> [    0.000005] sched_clock: 56 bits at 6MHz, resolution 162ns, wraps every 4398046511085ns
> [    0.008213] Switching to timer-based delay loop, resolution 162ns
> [    0.015259] clocksource: 32k_counter: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 58327039986419 ns
> [    0.025358] OMAP clocksource: 32k_counter at 32768 Hz
> [    0.032033] Console: colour dummy device 80x30
> [    0.036522] Calibrating delay loop (skipped), value calculated using timer frequency.. 12.28 BogoMIPS (lpj=61440)
> [    0.047056] pid_max: default: 32768 minimum: 301
> [    0.051876] LSM: Security Framework initializing
> [    0.056566] SELinux:  Initializing.
> [    0.060164] *** VALIDATE SELinux ***
> [    0.063796] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
> [    0.071282] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
> [    0.079273] *** VALIDATE tmpfs ***
> [    0.083118] *** VALIDATE proc ***
> [    0.086531] *** VALIDATE cgroup1 ***
> [    0.090116] *** VALIDATE cgroup2 ***
> [    0.093793] CPU: Testing write buffer coherency: ok
> [    0.098778] CPU0: Spectre v2: firmware did not set auxiliary control register IBE bit, system vulnerable
> [    0.108725] /cpus/cpu at 0 missing clock-frequency property
> [    0.114099] /cpus/cpu at 1 missing clock-frequency property
> [    0.119554] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
> [    0.179685] Setting up static identity map for 0x80100000 - 0x80100060
> [    0.186399] rcu: Hierarchical SRCU implementation.
> [    0.231309] smp: Bringing up secondary CPUs ...
> [    0.291743] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
> [    0.291749] CPU1: Spectre v2: using ICIALLU workaround
> [    0.302865] smp: Brought up 1 node, 2 CPUs
> [    0.306984] SMP: Total of 2 processors activated (24.57 BogoMIPS).
> [    0.313354] CPU: All CPU(s) started in HYP mode.
> [    0.318050] CPU: Virtualization extensions available.
> [    0.323586] devtmpfs: initialized
> [    0.339891] VFP support v0.3: implementor 41 architecture 4 part 30 variant f rev 0
> [    0.348154] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
> [    0.358194] futex hash table entries: 512 (order: 3, 32768 bytes, linear)
> [    0.365642] pinctrl core: initialized pinctrl subsystem
> [    0.372168] NET: Registered protocol family 16
> [    0.383052] DMA: preallocated 1024 KiB pool for atomic coherent allocations
> [    0.390953] omap_hwmod: l3_main_3 using broken dt data from ocp
> [    0.397641] omap_hwmod: l3_main_2 using broken dt data from ocp
> [    0.430210] audit: initializing netlink subsys (disabled)
> [    0.436325] debugfs: Directory 'dummy-scm_conf at 0' with parent 'regmap' already present!
> [    0.442955] audit: type=2000 audit(0.380:1): state=initialized audit_enabled=0 res=1
> [    0.452457] cpuidle: using governor menu
> [    0.467208] platform 4ae10000.gpio: Cannot lookup hwmod 'gpio1'
> [    0.473367] omap_gpio 4ae10000.gpio: Could not get gpio dbck. Disable debounce
> [    0.480719] omap_gpio 4ae10000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    0.490131] OMAP GPIO hardware version 0.1
> [    0.494562] platform 48055000.gpio: Cannot lookup hwmod 'gpio2'
> [    0.500723] omap_gpio 48055000.gpio: Could not get gpio dbck. Disable debounce
> [    0.508081] omap_gpio 48055000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    0.517701] platform 48057000.gpio: Cannot lookup hwmod 'gpio3'
> [    0.523874] omap_gpio 48057000.gpio: Could not get gpio dbck. Disable debounce
> [    0.531210] omap_gpio 48057000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    0.540864] platform 48059000.gpio: Cannot lookup hwmod 'gpio4'
> [    0.547018] omap_gpio 48059000.gpio: Could not get gpio dbck. Disable debounce
> [    0.554370] omap_gpio 48059000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    0.563977] platform 4805b000.gpio: Cannot lookup hwmod 'gpio5'
> [    0.570145] omap_gpio 4805b000.gpio: Could not get gpio dbck. Disable debounce
> [    0.577482] omap_gpio 4805b000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    0.587133] platform 4805d000.gpio: Cannot lookup hwmod 'gpio6'
> [    0.593280] omap_gpio 4805d000.gpio: Could not get gpio dbck. Disable debounce
> [    0.600629] omap_gpio 4805d000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    0.610246] platform 48051000.gpio: Cannot lookup hwmod 'gpio7'
> [    0.616419] omap_gpio 48051000.gpio: Could not get gpio dbck. Disable debounce
> [    0.623754] omap_gpio 48051000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    0.633394] platform 48053000.gpio: Cannot lookup hwmod 'gpio8'
> [    0.639540] omap_gpio 48053000.gpio: Could not get gpio dbck. Disable debounce
> [    0.646895] omap_gpio 48053000.gpio: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    0.655924] GPIO line 234 (gpio8_234/msecure) hogged as output/high
> [    0.662930] platform 50000000.gpmc: Cannot lookup hwmod 'gpmc'
> [    0.668992] omap-gpmc 50000000.gpmc: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    0.677953] omap-gpmc 50000000.gpmc: GPMC revision 6.0
> [    0.683804] platform 48070000.i2c: Cannot lookup hwmod 'i2c1'
> [    0.689925] platform 5600fe00.sgx: Cannot lookup hwmod 'gpu'
> [    0.695935] platform 48072000.i2c: Cannot lookup hwmod 'i2c2'
> [    0.702052] platform 48060000.i2c: Cannot lookup hwmod 'i2c3'
> [    0.708148] platform 4807a000.i2c: Cannot lookup hwmod 'i2c4'
> [    0.714261] platform 4807c000.i2c: Cannot lookup hwmod 'i2c5'
> [    0.720965] platform 4806c000.serial: Cannot lookup hwmod 'uart2'
> [    0.727447] platform 48020000.serial: Cannot lookup hwmod 'uart3'
> [    0.733903] platform 4806e000.serial: Cannot lookup hwmod 'uart4'
> [    0.740386] platform 48068000.serial: Cannot lookup hwmod 'uart6'
> [    0.746843] platform 4809c000.mmc: Cannot lookup hwmod 'mmc1'
> [    0.752960] platform 480b4000.mmc: Cannot lookup hwmod 'mmc2'
> [    0.759071] platform 480ad000.mmc: Cannot lookup hwmod 'mmc3'
> [    0.765181] platform 480d1000.mmc: Cannot lookup hwmod 'mmc4'
> [    0.787482] No ATAGs?
> [    0.787547] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
> [    0.798029] hw-breakpoint: maximum watchpoint size is 8 bytes.
> [    0.804493] OMAP DMA hardware revision 0.0
> [    0.811318] Serial: AMBA PL011 UART driver
> [    0.859993] omap-dma-engine 4a056000.dma-controller: OMAP DMA engine driver (LinkedList1/2/3 supported)
> [    0.872353] vsys_cobra: supplied by vmain
> [    0.881029] iommu: Default domain type: Translated 
> [    0.886891] omap-iommu 4a066000.mmu: 4a066000.mmu registered
> [    0.892928] omap-iommu 55082000.mmu: 55082000.mmu registered
> [    0.900920] vgaarb: loaded
> [    0.904234] SCSI subsystem initialized
> [    0.908323] libata version 3.00 loaded.
> [    0.912725] usbcore: registered new interface driver usbfs
> [    0.918367] usbcore: registered new interface driver hub
> [    0.923867] usbcore: registered new device driver usb
> [    0.929228] usb_phy_generic hsusb2_phy: hsusb2_phy supply vcc not found, using dummy regulator
> [    0.940118] Advanced Linux Sound Architecture Driver Initialized.
> [    0.947601] clocksource: Switched to clocksource arch_sys_counter
> [    1.010721] VFS: Disk quotas dquot_6.6.0
> [    1.014723] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
> [    1.021858] *** VALIDATE ramfs ***
> [    1.038400] thermal_sys: Registered thermal governor 'fair_share'
> [    1.038404] thermal_sys: Registered thermal governor 'step_wise'
> [    1.044579] thermal_sys: Registered thermal governor 'user_space'
> [    1.051515] NET: Registered protocol family 2
> [    1.062648] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
> [    1.071183] TCP established hash table entries: 8192 (order: 3, 32768 bytes, linear)
> [    1.079173] TCP bind hash table entries: 8192 (order: 4, 65536 bytes, linear)
> [    1.086537] TCP: Hash tables configured (established 8192 bind 8192)
> [    1.093085] UDP hash table entries: 512 (order: 2, 16384 bytes, linear)
> [    1.099838] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes, linear)
> [    1.107187] NET: Registered protocol family 1
> [    1.111615] PCI: CLS 0 bytes, default 64
> [    1.168351] hw perfevents: no interrupt-affinity property for /pmu, guessing.
> [    1.175765] hw perfevents: enabled with armv7_cortex_a15 PMU driver, 7 counters available
> [    1.186590] Initialise system trusted keyrings
> [    1.191267] workingset: timestamp_bits=30 max_order=19 bucket_order=0
> [    1.197895] zbud: loaded
> [    1.200755] squashfs: version 4.0 (2009/01/31) Phillip Lougher
> [    1.207273] Key type asymmetric registered
> [    1.211422] Asymmetric key parser 'x509' registered
> [    1.216431] bounce: pool size: 64 pages
> [    1.220440] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
> [    1.227974] io scheduler mq-deadline registered
> [    1.232594] io scheduler kyber registered
> [    1.241341] ti-pipe3 4a096000.phy: can't get syscon-pllreset, sata dpll won't idle
> [    1.250292] pinctrl-single 4a002840.pinmux: 219 pins, size 438
> [    1.256703] pinctrl-single 4ae0c840.pinmux: 30 pins, size 60
> [    1.273118] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
> [    1.282635] omap_uart 4806c000.serial: no wakeirq for uart1
> [    1.288479] omap_uart 4806c000.serial: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    1.297626] 4806c000.serial: ttyO1 at MMIO 0x4806c000 (irq = 46, base_baud = 3000000) is a OMAP UART1
> [    1.307312] serial serial0: tty port ttyO1 registered
> [    1.312842] omap_uart 48020000.serial: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> *[    1.331508] printk: console [ttyO2] enabledx48020000 (irq = 47, base_baud = 3000000) is a OMAP UART2
> [    1.331508] printk: console [ttyO2] enabled
> [    1.340121] printk: bootconsole [omapserial0] disabled
> [    1.340121] printk: bootconsole [omapserial0] disabled
> [    1.351369] omap_uart 4806e000.serial: no wakeirq for uart3
> [    1.357369] omap_uart 4806e000.serial: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    1.366804] 4806e000.serial: ttyO3 at MMIO 0x4806e000 (irq = 48, base_baud = 3000000) is a OMAP UART3
> [    1.377044] omap_uart 48068000.serial: no wakeirq for uart5
> [    1.383087] omap_uart 48068000.serial: _od_fail_runtime_resume: FIXME: missing hwmod/omap_dev info
> [    1.392514] ------------[ cut here ]------------
> [    1.397370] WARNING: CPU: 0 PID: 1 at drivers/bus/omap_l3_noc.c:147 l3_interrupt_handler+0x2c0/0x330
> [    1.406955] 44000000.ocp:L3 Custom Error: MASTER MPU TARGET L4PER2 (Read): Data Access in User mode during Functional access
> [    1.418736] Modules linked in:
> [    1.421944] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.4.0-letux+ #7
> [    1.428693] Hardware name: Generic OMAP5 (Flattened Device Tree)
> [    1.435003] [<c010fe8c>] (unwind_backtrace) from [<c010b28c>] (show_stack+0x10/0x14)
> [    1.443130] [<c010b28c>] (show_stack) from [<c07ca8d0>] (dump_stack+0x88/0xa8)
> [    1.450715] [<c07ca8d0>] (dump_stack) from [<c013130c>] (__warn+0xcc/0xe8)
> [    1.457933] [<c013130c>] (__warn) from [<c01316c8>] (warn_slowpath_fmt+0x74/0xa0)
> [    1.465794] [<c01316c8>] (warn_slowpath_fmt) from [<c045b064>] (l3_interrupt_handler+0x2c0/0x330)
> [    1.475112] [<c045b064>] (l3_interrupt_handler) from [<c0178214>] (__handle_irq_event_percpu+0xcc/0x270)
> [    1.485072] [<c0178214>] (__handle_irq_event_percpu) from [<c01783dc>] (handle_irq_event_percpu+0x24/0x78)
> [    1.495201] [<c01783dc>] (handle_irq_event_percpu) from [<c0178468>] (handle_irq_event+0x38/0x5c)
> [    1.504514] [<c0178468>] (handle_irq_event) from [<c017c900>] (handle_fasteoi_irq+0x9c/0x114)
> [    1.513462] [<c017c900>] (handle_fasteoi_irq) from [<c0177530>] (generic_handle_irq+0x18/0x28)
> [    1.522507] [<c0177530>] (generic_handle_irq) from [<c0177ae0>] (__handle_domain_irq+0x90/0xa0)
> [    1.531642] [<c0177ae0>] (__handle_domain_irq) from [<c0458890>] (gic_handle_irq+0x58/0x90)
> [    1.540405] [<c0458890>] (gic_handle_irq) from [<c0101a8c>] (__irq_svc+0x6c/0xa8)
> [    1.548251] Exception stack(0xee0d7da8 to 0xee0d7df0)
> [    1.553556] 7da0:                   ffffffed 00000014 00000000 00000000 ee43e840 ee43e9e9
> [    1.562140] 7dc0: ee229010 ee229000 ee43ea14 ee43cac0 ee1233c0 00000000 ee2290ec ee0d7df8
> [    1.570726] 7de0: c07e37c8 c0512950 40000013 ffffffff
> [    1.576036] [<c0101a8c>] (__irq_svc) from [<c0512950>] (serial_omap_probe+0x3dc/0x49c)
> [    1.584350] [<c0512950>] (serial_omap_probe) from [<c052eaf8>] (platform_drv_probe+0x48/0x94)
> [    1.593297] [<c052eaf8>] (platform_drv_probe) from [<c052cd80>] (really_probe+0x1f8/0x318)
> [    1.601974] [<c052cd80>] (really_probe) from [<c052d124>] (driver_probe_device+0x13c/0x158)
> [    1.610742] [<c052d124>] (driver_probe_device) from [<c052d2cc>] (device_driver_attach+0x44/0x5c)
> [    1.620051] [<c052d2cc>] (device_driver_attach) from [<c052d390>] (__driver_attach+0xac/0xb4)
> [    1.628998] [<c052d390>] (__driver_attach) from [<c052b244>] (bus_for_each_dev+0x64/0xa0)
> [    1.637586] [<c052b244>] (bus_for_each_dev) from [<c052c208>] (bus_add_driver+0x154/0x1b4)
> [    1.646254] [<c052c208>] (bus_add_driver) from [<c052dc44>] (driver_register+0xac/0xf0)
> [    1.654657] [<c052dc44>] (driver_register) from [<c0b4cee0>] (serial_omap_init+0x20/0x40)
> [    1.663248] [<c0b4cee0>] (serial_omap_init) from [<c0102e3c>] (do_one_initcall+0xe4/0x270)
> [    1.671928] [<c0102e3c>] (do_one_initcall) from [<c0b01054>] (kernel_init_freeable+0x198/0x1e0)
> [    1.681059] [<c0b01054>] (kernel_init_freeable) from [<c07df788>] (kernel_init+0x8/0x10c)
> [    1.689648] [<c07df788>] (kernel_init) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
> [    1.697585] Exception stack(0xee0d7fb0 to 0xee0d7ff8)
> [    1.702879] 7fa0:                                     00000000 00000000 00000000 00000000
> [    1.711454] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> [    1.720032] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
> [    1.726974] ---[ end trace a15b116a0dda39df ]---
> [    1.731847] 8<--- cut here ---
> [    1.735053] Unhandled fault: imprecise external abort (0x1406) at 0x00000000
> [    1.742445] pgd = (ptrval)
> [    1.745278] [00000000] *pgd=00000000
> [    1.749032] Internal error: : 1406 [#1] PREEMPT SMP ARM
> [    1.754512] Modules linked in:
> [    1.757720] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W         5.4.0-letux+ #7
> [    1.765931] Hardware name: Generic OMAP5 (Flattened Device Tree)
> [    1.772231] PC is at serial_omap_probe+0x3dc/0x49c
> [    1.777259] LR is at _raw_spin_unlock_irqrestore+0x18/0x50
> [    1.783013] pc : [<c0512950>]    lr : [<c07e37c8>]    psr: 40000013
> [    1.789590] sp : ee0d7df8  ip : ee2290ec  fp : 00000000
> [    1.795071] r10: ee1233c0  r9 : ee43cac0  r8 : ee43ea14
> [    1.800545] r7 : ee229000  r6 : ee229010  r5 : ee43e9e9  r4 : ee43e840
> [    1.807394] r3 : 00000000  r2 : 00000000  r1 : 00000014  r0 : ffffffed
> [    1.814244] Flags: nZcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
> [    1.821726] Control: 10c5387d  Table: 8000406a  DAC: 00000051
> [    1.827753] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
> [    1.834055] Stack: (0xee0d7df8 to 0xee0d8000)
> [    1.838618] 7de0:                                                       00000000 00000001
> [    1.847204] 7e00: 62f2dbde ee229010 00000000 c0c68948 c0cd8f98 00000000 c0c68948 00000000
> [    1.855795] 7e20: c0b004a4 c052eaf8 ee229010 00000000 c0cd8f94 c052cd80 ee229010 c0c68948
> [    1.864383] 7e40: c0c68948 c052d2e4 00000000 c0ca9d40 c0b8a3b0 c052d124 c0c68948 ee229010
> [    1.872975] 7e60: 62f2dbde 00000000 ee229010 c0c68948 c052d2e4 00000000 c0ca9d40 c052d2cc
> [    1.881562] 7e80: 00000000 ee229010 c0c68948 c052d390 ee229010 c0c03f48 c0c68948 c052b244
> [    1.890147] 7ea0: c0b8a3b0 ee0b6d58 ee3045b4 62f2dbde ee0b6d6c c0c68948 ee6a3180 00000000
> [    1.898739] 7ec0: c0c6a510 c052c208 c0976e35 c0976e36 00000000 c0c68948 c0ca0b20 c0c03f48
> [    1.907327] 7ee0: c0b4cec0 c052dc44 00000000 c0ca0b20 c0c03f48 c0b4cee0 ffffe000 c0102e3c
> [    1.915916] 7f00: c0a1ab94 00000000 00000000 c014d800 00000000 c0b004a4 c0a19a64 000000dd
> [    1.924507] 7f20: 00000006 00000006 00000000 c0a1aba8 000000dc c0a1aba8 00000000 efdfe15c
> [    1.933100] 7f40: 00000000 62f2dbde c0b004a4 62f2dbde c0ca9d40 00000007 c0ca9d40 c0b68834
> [    1.941693] 7f60: c0b68854 000000dd c0ca9d40 c0b01054 00000006 00000006 00000000 c0b004a4
> [    1.950267] 7f80: c07df780 00000000 c07df780 00000000 00000000 00000000 00000000 00000000
> [    1.958862] 7fa0: 00000000 c07df788 00000000 c01010e8 00000000 00000000 00000000 00000000
> [    1.967441] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> [    1.976020] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
> [    1.984600] [<c0512950>] (serial_omap_probe) from [<c052eaf8>] (platform_drv_probe+0x48/0x94)
> [    1.993544] [<c052eaf8>] (platform_drv_probe) from [<c052cd80>] (really_probe+0x1f8/0x318)
> [    2.002209] [<c052cd80>] (really_probe) from [<c052d124>] (driver_probe_device+0x13c/0x158)
> [    2.010973] [<c052d124>] (driver_probe_device) from [<c052d2cc>] (device_driver_attach+0x44/0x5c)
> [    2.020282] [<c052d2cc>] (device_driver_attach) from [<c052d390>] (__driver_attach+0xac/0xb4)
> [    2.029225] [<c052d390>] (__driver_attach) from [<c052b244>] (bus_for_each_dev+0x64/0xa0)
> [    2.037802] [<c052b244>] (bus_for_each_dev) from [<c052c208>] (bus_add_driver+0x154/0x1b4)
> [    2.046468] [<c052c208>] (bus_add_driver) from [<c052dc44>] (driver_register+0xac/0xf0)
> [    2.054861] [<c052dc44>] (driver_register) from [<c0b4cee0>] (serial_omap_init+0x20/0x40)
> [    2.063451] [<c0b4cee0>] (serial_omap_init) from [<c0102e3c>] (do_one_initcall+0xe4/0x270)
> [    2.072119] [<c0102e3c>] (do_one_initcall) from [<c0b01054>] (kernel_init_freeable+0x198/0x1e0)
> [    2.081254] [<c0b01054>] (kernel_init_freeable) from [<c07df788>] (kernel_init+0x8/0x10c)
> [    2.089834] [<c07df788>] (kernel_init) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
> [    2.097764] Exception stack(0xee0d7fb0 to 0xee0d7ff8)
> [    2.103063] 7fa0:                                     00000000 00000000 00000000 00000000
> [    2.111642] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> [    2.120217] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
> [    2.127158] Code: 0affff15 e3e03015 e58431d0 eaffff9a (e7e32253) 
> [    2.133561] ---[ end trace a15b116a0dda39e0 ]---
> [    2.138481] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> [    2.146518] CPU0: stopping
> [    2.149358] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G      D W         5.4.0-letux+ #7
> [    2.157559] Hardware name: Generic OMAP5 (Flattened Device Tree)
> [    2.163866] [<c010fe8c>] (unwind_backtrace) from [<c010b28c>] (show_stack+0x10/0x14)
> [    2.171994] [<c010b28c>] (show_stack) from [<c07ca8d0>] (dump_stack+0x88/0xa8)
> [    2.179573] [<c07ca8d0>] (dump_stack) from [<c010e474>] (handle_IPI+0x2b4/0x394)
> [    2.187337] [<c010e474>] (handle_IPI) from [<c04588bc>] (gic_handle_irq+0x84/0x90)
> [    2.195284] [<c04588bc>] (gic_handle_irq) from [<c0101a8c>] (__irq_svc+0x6c/0xa8)
> [    2.203126] Exception stack(0xc0c01f18 to 0xc0c01f60)
> [    2.208428] 1f00:                                                       00000000 eedccc74
> [    2.217005] 1f20: 00000000 c01192a0 00000000 ffffe000 00000000 c0c03f48 c0c03f68 c0c03fa8
> [    2.225585] 1f40: c0b95770 c0b68a40 00000000 c0c01f68 c0108188 c0108178 60000113 ffffffff
> [    2.234175] [<c0101a8c>] (__irq_svc) from [<c0108178>] (arch_cpu_idle+0x1c/0x38)
> [    2.241942] [<c0108178>] (arch_cpu_idle) from [<c015b768>] (do_idle+0x130/0x298)
> [    2.249701] [<c015b768>] (do_idle) from [<c015bb78>] (cpu_startup_entry+0x18/0x20)
> [    2.257644] [<c015bb78>] (cpu_startup_entry) from [<c0b00e04>] (start_kernel+0x410/0x4c8)
> [    2.266226] [<c0b00e04>] (start_kernel) from [<00000000>] (0x0)
> [    2.272446] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]---
> _______________________________________________
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