Ubuntu 更换uImage时引导时出现问题

我对内核中的驱动程序代码做了一个小改动，构建了内核（uImage）

替换ISO中的uImage（提取并重建）。但我在引导时遇到以下错误。我甚至恢复了代码更改，只构建并替换了uImage。错误仍然存在。我不理解这个问题。甚至在互联网上搜索，但无法获得所有的解决方案

谁能给我指路吗。预构建的内核uImage工作正常

U-Boot 2009.08 (Jan 11 2019 - 08:37:07)

CPU: Freescale i.MX6 family TO0.0 at 996 MHz
Thermal sensor with ratio = 189
Temperature:   20 C, calibration data 0x5a94f97d
mx6q pll1: 996MHz
mx6q pll2: 528MHz
mx6q pll3: 480MHz
mx6q pll8: 50MHz
ipg clock     : 66000000Hz
ipg per clock : 66000000Hz
uart clock    : 80000000Hz
cspi clock    : 60000000Hz
ahb clock     : 132000000Hz
axi clock   : 264000000Hz
emi_slow clock: 132000000Hz
ddr clock     : 528000000Hz
usdhc1 clock  : 198000000Hz
usdhc2 clock  : 198000000Hz
usdhc3 clock  : 198000000Hz
usdhc4 clock  : 198000000Hz
nfc clock     : 24000000Hz
Board: MX6-IAVS:[POR] - Built under Wind River Linux
Boot Device: UNKNOWN
I2C:   ready
DRAM:   2 GB
MMC:   status 0
FSL_ESDHC: 0
In:    serial
Out:   serial
Err:   serial
Net:   got MAC address from IIM: 9c:28:bf:d2:c1:c7
FEC0 [PRIME]
autoboot in 5 seconds
(Re)start USB...
USB:   Register 10011 NbrPorts 1
USB EHCI 1.00
scanning bus for devices... 2 USB Device(s) found
       scanning bus for storage devices... 1 Storage Device(s) found

Loading from USB device 0, partition 0: Name: usbda0  Type: U-Boot
   Image Name:   EoLTesting
   Image Type:   ARM Linux Multi-File Image (uncompressed)
   Data Size:    4708687 Bytes =  4.5 MB
   Load Address: 10008000
   Entry Point:  10008000
   Contents:
      Image 0: 4283224 Bytes =  4.1 MB
      Image 1: 425451 Bytes = 415.5 kB
...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................
stopping USB..
## Copying part 1 from legacy image at 10800000 ...
   Verifying Checksum ... OK
## Booting kernel from Legacy Image at 10800000 ...
   Image Name:   EoLTesting
   Image Type:   ARM Linux Multi-File Image (uncompressed)
   Data Size:    4708687 Bytes =  4.5 MB
   Load Address: 10008000
   Entry Point:  10008000
   Contents:
      Image 0: 4283224 Bytes =  4.1 MB
      Image 1: 425451 Bytes = 415.5 kB
   Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 12000000 ...
   Image Name:   
   Image Type:   ARM Linux RAMDisk Image (gzip compressed)
   Data Size:    425387 Bytes = 415.4 kB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Loading Multi-File Image ... OK
OK

Starting kernel ...

Booting Linux on physical CPU 0
Initializing cgroup subsys cpuset
Initializing cgroup subsys cpu
Linux version 3.4.91-rt56-WR5.0.1.26_preempt-rt (chukkaa@nul6136u) (gcc version 4.6.3 (Wind River Linux Sourcery CodeBench 4.6a-148) ) #4 SMP PREEMPT RT Tue Jul 12 13:18:56 CEST 2016
CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache

Truncating RAM at 10000000-8fffffff to -7b7fffff (vmalloc region overlap).
Memory policy: ECC disabled, Data cache writealloc
CPU identified as i.MX6Q, silicon rev 1.5
PERCPU: Embedded 9 pages/cpu @81a75000 s16256 r8192 d12416 u36864
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 432784
Kernel command line: root=/dev/ram0 rw nosmp video=mxcfb0:dev=lcd,800x600-32@60,if=RGB24
PID hash table entries: 4096 (order: 2, 16384 bytes)
Dentry cache hash table entries: 262144 (order: 8, 1048576 bytes)
Inode-cache hash table entries: 131072 (order: 7, 524288 bytes)
allocated 15851520 bytes of page_cgroup
please try 'cgroup_disable=memory' option if you don't want memory cgroups
Memory: 752MB 952MB = 1704MB total
Memory: 1700200k/1700200k available, 61080k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
    vmalloc : 0xec000000 - 0xfb000000   ( 240 MB)
    lowmem  : 0x80000000 - 0xeb800000   (1720 MB)
    modules : 0x7f000000 - 0x80000000   (  16 MB)
      .text : 0x80008000 - 0x80b789b8   (11715 kB)
      .init : 0x80b79000 - 0x80bc2f80   ( 296 kB)
      .data : 0x80bc4000 - 0x80c33a58   ( 447 kB)
       .bss : 0x80c33a7c - 0x80cdf06c   ( 686 kB)
Preemptible hierarchical RCU implementation.
NR_IRQS:436
sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms
arm_max_freq=1GHz
twd_local_timer_register failed -6
MXC_Early serial console at MMIO 0x21f0000 (options '115200')
bootconsole [ttymxc0] enabled
Console: colour dummy device 80x30
VFS: Unable to mount root fs on unknown-block(1,0)
User configuration error - no valid root filesystem found
Kernel panic - not syncing: Invalid configuration from end user prevents continuing
[<80017c70>] (unwind_backtrace+0x0/0xf8) from [<80542f64>] (dump_stack+0x20/0x24)
[<80542f64>] (dump_stack+0x20/0x24) from [<8054328c>] (panic+0x138/0x298)
[<8054328c>] (panic+0x138/0x298) from [<80afff60>] (change_floppy+0x0/0xec)
[<80afff60>] (change_floppy+0x0/0xec) from [<80b000b4>] (mount_root+0x68/0x6c)
[<80b000b4>] (mount_root+0x68/0x6c) from [<80b00250>] (prepare_namespace+0x198/0x1dc)
[<80b00250>] (prepare_namespace+0x198/0x1dc) from [<80affb50>] (kernel_init+0x294/0x29c)
[<80affb50>] (kernel_init+0x294/0x29c) from [<8000f4e4>] (kernel_thread_exit+0x0/0x8)
CPU3: stopping
[<80017c70>] (unwind_backtrace+0x0/0xf8) from [<80542f64>] (dump_stack+0x20/0x24)
[<80542f64>] (dump_stack+0x20/0x24) from [<80014e18>] (handle_IPI+0x170/0x1a8)
[<80014e18>] (handle_IPI+0x170/0x1a8) from [<80008544>] (gic_handle_irq+0x64/0x68)
[<80008544>] (gic_handle_irq+0x64/0x68) from [<805483c0>] (__irq_svc+0x40/0x70)
Exception stack(0xea0f5f58 to 0xea0f5fa0)
5f40:                                                       00000001 80000093
5f60: f2a02000 8001f200 80bb77c8 80b67408 805505d0 ea0f4000 ea0f4030 80b6c650
5f80: ea0f4000 ea0f5fac ea0f5fb0 ea0f5fa0 8000f5b8 8000f5bc 60000013 ffffffff
[<805483c0>] (__irq_svc+0x40/0x70) from [<8000f5bc>] (default_idle+0x48/0x4c)
[<8000f5bc>] (default_idle+0x48/0x4c) from [<8000f8f4>] (cpu_idle+0xdc/0x110)
[<8000f8f4>] (cpu_idle+0xdc/0x110) from [<8053f730>] (secondary_start_kernel+0x124/0x12c)
[<8053f730>] (secondary_start_kernel+0x124/0x12c) from [<1053ed14>] (0x1053ed14)
CPU1: stopping
[<80017c70>] (unwind_backtrace+0x0/0xf8) from [<80542f64>] (dump_stack+0x20/0x24)
[<80542f64>] (dump_stack+0x20/0x24) from [<80014e18>] (handle_IPI+0x170/0x1a8)
[<80014e18>] (handle_IPI+0x170/0x1a8) from [<80008544>] (gic_handle_irq+0x64/0x68)
[<80008544>] (gic_handle_irq+0x64/0x68) from [<805483c0>] (__irq_svc+0x40/0x70)
Exception stack(0xea0b1f58 to 0xea0b1fa0)
1f40:                                                       00000001 80000093
1f60: f2a02000 8001f200 80bb77c8 80b67408 805505d0 ea0b0000 ea0b0030 80b6c650
1f80: ea0b0000 ea0b1fac ea0b1fb0 ea0b1fa0 8000f5b8 8000f5bc 60000013 ffffffff
[<805483c0>] (__irq_svc+0x40/0x70) from [<8000f5bc>] (default_idle+0x48/0x4c)
[<8000f5bc>] (default_idle+0x48/0x4c) from [<8000f8f4>] (cpu_idle+0xdc/0x110)
[<8000f8f4>] (cpu_idle+0xdc/0x110) from [<8053f730>] (secondary_start_kernel+0x124/0x12c)
[<8053f730>] (secondary_start_kernel+0x124/0x12c) from [<1053ed14>] (0x1053ed14)
CPU2: stopping
[<80017c70>] (unwind_backtrace+0x0/0xf8) from [<80542f64>] (dump_stack+0x20/0x24)
[<80542f64>] (dump_stack+0x20/0x24) from [<80014e18>] (handle_IPI+0x170/0x1a8)
[<80014e18>] (handle_IPI+0x170/0x1a8) from [<80008544>] (gic_handle_irq+0x64/0x68)
[<80008544>] (gic_handle_irq+0x64/0x68) from [<805483c0>] (__irq_svc+0x40/0x70)
Exception stack(0xea0e3f58 to 0xea0e3fa0)
3f40:                                                       00000001 80000093
3f60: f2a02000 8001f200 80bb77c8 80b67408 805505d0 ea0e2000 ea0e2030 80b6c650
3f80: ea0e2000 ea0e3fac ea0e3fb0 ea0e3fa0 8000f5b8 8000f5bc 60000013 ffffffff
[<805483c0>] (__irq_svc+0x40/0x70) from [<8000f5bc>] (default_idle+0x48/0x4c)
[<8000f5bc>] (default_idle+0x48/0x4c) from [<8000f8f4>] (cpu_idle+0xdc/0x110)
[<8000f8f4>] (cpu_idle+0xdc/0x110) from [<8053f730>] (secondary_start_kernel+0x124/0x12c)
[<8053f730>] (secondary_start_kernel+0x124/0x12c) from [<1053ed14>] (0x1053ed14)

U-Boot 2009.08（2019年1月11日-08:37:07）
CPU:Freescale i.MX6系列在996MHz时为0.0
比率为189的热传感器
温度：20℃，校准数据0x5a94f97d
mx6q pll1:996MHz
mx6q pll2:528MHz
mx6q pll3:480MHz
mx6q pll8:50MHz
ipg时钟：66000000Hz
ipg/时钟：66000000Hz
uart时钟：80000000Hz
cspi时钟：6000000Hz
ahb时钟：132000000Hz
axi时钟：2640000Hz
emi_慢时钟：132000000Hz
ddr时钟：52800000Hz
usdhc1时钟：198000000Hz
usdhc2时钟：198000000Hz
usdhc3时钟：198000000Hz
usdhc4时钟：198000000Hz
nfc时钟：24000000Hz
董事会：MX6-IAVS:[POR]-在Wind River Linux下建造
启动设备：未知
I2C：准备好了吗
动态随机存取存储器：2GB
MMC:状态0
FSL_ESDHC:0
In：序列号
输出：序列号
错误：串行
网络：从IIM:9c:28:bf:d2:c1:c7获得MAC地址
FEC0[PRIME]
5秒内自动启动
（重新）启动USB。。。
USB：寄存器10011端口1
USB EHCI 1.00
正在扫描设备的总线。。。找到2个USB设备
正在扫描存储设备的总线。。。找到1个存储设备
从USB设备0、分区0加载：名称：usbda0类型：U-Boot
图像名称：EOL测试
映像类型：ARM Linux多文件映像（未压缩）
数据大小：4708687字节=4.5 MB
加载地址：10008000
入境点：10008000
内容：
图像0:4283224字节=4.1 MB
图1:425451字节=415.5 kB
...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................
正在停止USB。。
##正在从10800000处的旧映像复制第1部分。。。
正在验证校验和。。。好啊
##正在从旧映像以10800000启动内核。。。
图像名称：EOL测试
映像类型：ARM Linux多文件映像（未压缩）
数据大小：4708687字节=4.5 MB
加载地址：10008000
入境点：10008000
内容：
图像0:4283224字节=4.1 MB
图1:425451字节=415.5 kB
正在验证校验和。。。好啊
##正在以12000000从旧映像加载init Ramdisk。。。
图像名称：
映像类型：ARM Linux RAMDisk映像（gzip压缩）
数据大小：425387字节=415.4KB
加载地址：00000000
入口点：00000000
正在验证校验和。。。好啊
正在加载多文件图像。。。好啊
好啊
正在启动内核。。。
在物理CPU 0上引导Linux
初始化cgroup subsys cpuset
初始化cgroup子系统cpu
Linux版本3.4.91-rt56-WR5.0.1.26_preempt-rt(chukkaa@nul6136u)（gcc版本4.6.3（Wind River Linux Sourcery CodeBench 4.6a-148））#4 SMP抢占RT周二7月12日13:18:56 CEST 2016
CPU:ARMv7处理器[412fc09a]版本10（ARMv7），cr=10c5387d
CPU:PIPT/VIPT非关联数据缓存、VIPT别名指令缓存
将10000000-8fffffff处的RAM截断为-7b7fffff（vmalloc区域重叠）。
内存策略：禁用ECC，数据缓存写LOC
CPU标识为i.MX6Q，硅版本1.5
PERCPU：嵌入式9页/cpu@81A7500S16256 r8192 d12416 u36864
按区域顺序建立1个区域列表，移动分组。总页数：432784
内核命令行：root=/dev/ram0 rw nosmp video=mxcfb0:dev=lcd，800x600-32@60，if=RGB24
PID哈希表条目：4096（顺序：216384字节）
Dentry缓存哈希表条目：262144（顺序：81048576字节）
Inode缓存哈希表条目：131072（顺序：7524288字节）
已分配页面组的15851520字节
如果不需要内存cgroup，请尝试“cgroup\u disable=memory”选项
内存：752MB952MB=1704MB总计
内存：1700200k/1700200k可用，61080k保留，0K高内存
虚拟内核内存布局：
向量：0xffff0000-0xffff1000（4KB）
固定映射：0xffc00000-0xfff00000（3072 kB）
vmalloc:0xec000000-0xfb000000（240 MB）
低内存：0x8000000-0xeb800000（1720 MB）
模块：0x7f000000-0x80000000（16 MB）
.文本：0x80008000-0x80b789b8（11715 kB）
.init:0x80b79000-0x80bc2f80（296KB）
.数据：0x80bc4000-0x80c33a58（447KB）
.bss:0x80c33a7c-0x80cdf06c（686KB）
可抢占的分层RCU实现。
编号：436
sched_时钟：3000kHz时32位，分辨率333ns，每1431655ms换行一次
臂最大频率=1GHz
twd_本地_定时器_寄存器故障-6
MMIO 0x21f0000上的MXC_早期串行控制台（选项“115200”）
引导控制台[ttymxc0]已启用
控制台：彩色虚拟设备80x30
VFS:无法在未知块（1,0）上装载根fs
用户配置错误-找不到有效的根文件系统
内核死机-不同步：来自最终用户的无效配置阻止继续
[]（从[]（转储堆栈+0x20/0x24）展开[]（回溯+0x0/0xf8）
[]（转储堆栈+0x20/0x24）从[]（死机+0x138/0x298）
[]（死机+0x138/0x298）从[]（更改软盘+0x0/0xec）
[]（将软盘+0x0/0xec）从[]（挂载根+0x68/0x6c）
[]（从[]（准备命名空间+0x198/0x1dc）装入[]（根目录+0x68/0x6c）
[]（从[]（内核初始化+0x294/0x29c）准备[]（命名空间+0x198/0x1dc）
[]（内核初始化+0x294/0x29c）从[]（内核线程退出+0x0/0x8）
CPU3：停止
[]（从[]（转储堆栈+0x20/0x24）展开[]（回溯+0x0/0xf8）
[]（转储堆栈+0x20/0x24）来自[]（句柄+0x170/0x1a8）
[]（句柄+0x170/0x1a8）来自[]（gic_句柄+0x64/0x68）
[]（gic_handle_irq+0x64/0x68）来自
U-Boot 2009.08 (Jan 11 2019 - 08:37:07)

CPU: Freescale i.MX6 family TO0.0 at 996 MHz
Thermal sensor with ratio = 189
Temperature:   20 C, calibration data 0x5a94f97d
mx6q pll1: 996MHz
mx6q pll2: 528MHz
mx6q pll3: 480MHz
mx6q pll8: 50MHz
ipg clock     : 66000000Hz
ipg per clock : 66000000Hz
uart clock    : 80000000Hz
cspi clock    : 60000000Hz
ahb clock     : 132000000Hz
axi clock   : 264000000Hz
emi_slow clock: 132000000Hz
ddr clock     : 528000000Hz
usdhc1 clock  : 198000000Hz
usdhc2 clock  : 198000000Hz
usdhc3 clock  : 198000000Hz
usdhc4 clock  : 198000000Hz
nfc clock     : 24000000Hz
Board: MX6-IAVS:[POR] - Built under Wind River Linux
Boot Device: UNKNOWN
I2C:   ready
DRAM:   2 GB
MMC:   status 0
FSL_ESDHC: 0
In:    serial
Out:   serial
Err:   serial
Net:   got MAC address from IIM: 9c:28:bf:d2:c1:c7
FEC0 [PRIME]
autoboot in 5 seconds
(Re)start USB...
USB:   Register 10011 NbrPorts 1
USB EHCI 1.00
scanning bus for devices... 2 USB Device(s) found
       scanning bus for storage devices... 1 Storage Device(s) found

Loading from USB device 0, partition 0: Name: usbda0  Type: U-Boot
   Image Name:   EoLTesting
   Image Type:   ARM Linux Multi-File Image (uncompressed)
   Data Size:    4708687 Bytes =  4.5 MB
   Load Address: 10008000
   Entry Point:  10008000
   Contents:
      Image 0: 4283224 Bytes =  4.1 MB
      Image 1: 425451 Bytes = 415.5 kB
...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................
stopping USB..
## Copying part 1 from legacy image at 10800000 ...
   Verifying Checksum ... OK
## Booting kernel from Legacy Image at 10800000 ...
   Image Name:   EoLTesting
   Image Type:   ARM Linux Multi-File Image (uncompressed)
   Data Size:    4708687 Bytes =  4.5 MB
   Load Address: 10008000
   Entry Point:  10008000
   Contents:
      Image 0: 4283224 Bytes =  4.1 MB
      Image 1: 425451 Bytes = 415.5 kB
   Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 12000000 ...
   Image Name:   
   Image Type:   ARM Linux RAMDisk Image (gzip compressed)
   Data Size:    425387 Bytes = 415.4 kB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Loading Multi-File Image ... OK
OK

Starting kernel ...

Booting Linux on physical CPU 0
Initializing cgroup subsys cpuset
Initializing cgroup subsys cpu
Linux version 3.4.91-rt56-WR5.0.1.26_preempt-rt (chukkaa@nul6136u) (gcc version 4.6.3 (Wind River Linux Sourcery CodeBench 4.6a-148) ) #4 SMP PREEMPT RT Tue Jul 12 13:18:56 CEST 2016
CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache

Truncating RAM at 10000000-8fffffff to -7b7fffff (vmalloc region overlap).
Memory policy: ECC disabled, Data cache writealloc
CPU identified as i.MX6Q, silicon rev 1.5
PERCPU: Embedded 9 pages/cpu @81a75000 s16256 r8192 d12416 u36864
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 432784
Kernel command line: root=/dev/ram0 rw nosmp video=mxcfb0:dev=lcd,800x600-32@60,if=RGB24
PID hash table entries: 4096 (order: 2, 16384 bytes)
Dentry cache hash table entries: 262144 (order: 8, 1048576 bytes)
Inode-cache hash table entries: 131072 (order: 7, 524288 bytes)
allocated 15851520 bytes of page_cgroup
please try 'cgroup_disable=memory' option if you don't want memory cgroups
Memory: 752MB 952MB = 1704MB total
Memory: 1700200k/1700200k available, 61080k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
    vmalloc : 0xec000000 - 0xfb000000   ( 240 MB)
    lowmem  : 0x80000000 - 0xeb800000   (1720 MB)
    modules : 0x7f000000 - 0x80000000   (  16 MB)
      .text : 0x80008000 - 0x80b789b8   (11715 kB)
      .init : 0x80b79000 - 0x80bc2f80   ( 296 kB)
      .data : 0x80bc4000 - 0x80c33a58   ( 447 kB)
       .bss : 0x80c33a7c - 0x80cdf06c   ( 686 kB)
Preemptible hierarchical RCU implementation.
NR_IRQS:436
sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms
arm_max_freq=1GHz
twd_local_timer_register failed -6
MXC_Early serial console at MMIO 0x21f0000 (options '115200')
bootconsole [ttymxc0] enabled
Console: colour dummy device 80x30
VFS: Unable to mount root fs on unknown-block(1,0)
User configuration error - no valid root filesystem found
Kernel panic - not syncing: Invalid configuration from end user prevents continuing
[<80017c70>] (unwind_backtrace+0x0/0xf8) from [<80542f64>] (dump_stack+0x20/0x24)
[<80542f64>] (dump_stack+0x20/0x24) from [<8054328c>] (panic+0x138/0x298)
[<8054328c>] (panic+0x138/0x298) from [<80afff60>] (change_floppy+0x0/0xec)
[<80afff60>] (change_floppy+0x0/0xec) from [<80b000b4>] (mount_root+0x68/0x6c)
[<80b000b4>] (mount_root+0x68/0x6c) from [<80b00250>] (prepare_namespace+0x198/0x1dc)
[<80b00250>] (prepare_namespace+0x198/0x1dc) from [<80affb50>] (kernel_init+0x294/0x29c)
[<80affb50>] (kernel_init+0x294/0x29c) from [<8000f4e4>] (kernel_thread_exit+0x0/0x8)
CPU3: stopping
[<80017c70>] (unwind_backtrace+0x0/0xf8) from [<80542f64>] (dump_stack+0x20/0x24)
[<80542f64>] (dump_stack+0x20/0x24) from [<80014e18>] (handle_IPI+0x170/0x1a8)
[<80014e18>] (handle_IPI+0x170/0x1a8) from [<80008544>] (gic_handle_irq+0x64/0x68)
[<80008544>] (gic_handle_irq+0x64/0x68) from [<805483c0>] (__irq_svc+0x40/0x70)
Exception stack(0xea0f5f58 to 0xea0f5fa0)
5f40:                                                       00000001 80000093
5f60: f2a02000 8001f200 80bb77c8 80b67408 805505d0 ea0f4000 ea0f4030 80b6c650
5f80: ea0f4000 ea0f5fac ea0f5fb0 ea0f5fa0 8000f5b8 8000f5bc 60000013 ffffffff
[<805483c0>] (__irq_svc+0x40/0x70) from [<8000f5bc>] (default_idle+0x48/0x4c)
[<8000f5bc>] (default_idle+0x48/0x4c) from [<8000f8f4>] (cpu_idle+0xdc/0x110)
[<8000f8f4>] (cpu_idle+0xdc/0x110) from [<8053f730>] (secondary_start_kernel+0x124/0x12c)
[<8053f730>] (secondary_start_kernel+0x124/0x12c) from [<1053ed14>] (0x1053ed14)
CPU1: stopping
[<80017c70>] (unwind_backtrace+0x0/0xf8) from [<80542f64>] (dump_stack+0x20/0x24)
[<80542f64>] (dump_stack+0x20/0x24) from [<80014e18>] (handle_IPI+0x170/0x1a8)
[<80014e18>] (handle_IPI+0x170/0x1a8) from [<80008544>] (gic_handle_irq+0x64/0x68)
[<80008544>] (gic_handle_irq+0x64/0x68) from [<805483c0>] (__irq_svc+0x40/0x70)
Exception stack(0xea0b1f58 to 0xea0b1fa0)
1f40:                                                       00000001 80000093
1f60: f2a02000 8001f200 80bb77c8 80b67408 805505d0 ea0b0000 ea0b0030 80b6c650
1f80: ea0b0000 ea0b1fac ea0b1fb0 ea0b1fa0 8000f5b8 8000f5bc 60000013 ffffffff
[<805483c0>] (__irq_svc+0x40/0x70) from [<8000f5bc>] (default_idle+0x48/0x4c)
[<8000f5bc>] (default_idle+0x48/0x4c) from [<8000f8f4>] (cpu_idle+0xdc/0x110)
[<8000f8f4>] (cpu_idle+0xdc/0x110) from [<8053f730>] (secondary_start_kernel+0x124/0x12c)
[<8053f730>] (secondary_start_kernel+0x124/0x12c) from [<1053ed14>] (0x1053ed14)
CPU2: stopping
[<80017c70>] (unwind_backtrace+0x0/0xf8) from [<80542f64>] (dump_stack+0x20/0x24)
[<80542f64>] (dump_stack+0x20/0x24) from [<80014e18>] (handle_IPI+0x170/0x1a8)
[<80014e18>] (handle_IPI+0x170/0x1a8) from [<80008544>] (gic_handle_irq+0x64/0x68)
[<80008544>] (gic_handle_irq+0x64/0x68) from [<805483c0>] (__irq_svc+0x40/0x70)
Exception stack(0xea0e3f58 to 0xea0e3fa0)
3f40:                                                       00000001 80000093
3f60: f2a02000 8001f200 80bb77c8 80b67408 805505d0 ea0e2000 ea0e2030 80b6c650
3f80: ea0e2000 ea0e3fac ea0e3fb0 ea0e3fa0 8000f5b8 8000f5bc 60000013 ffffffff
[<805483c0>] (__irq_svc+0x40/0x70) from [<8000f5bc>] (default_idle+0x48/0x4c)
[<8000f5bc>] (default_idle+0x48/0x4c) from [<8000f8f4>] (cpu_idle+0xdc/0x110)
[<8000f8f4>] (cpu_idle+0xdc/0x110) from [<8053f730>] (secondary_start_kernel+0x124/0x12c)
[<8053f730>] (secondary_start_kernel+0x124/0x12c) from [<1053ed14>] (0x1053ed14)