taeung 
I have a question. I've set SD card by ubuntu_sd_nanopc_t1.img. And I've replaced zImage by my zImage which have been built as linux kernel(3.8.13.16) for nanoPC t1. But I've failed linux booting as below.. ' [ OK ]ting up X socket directories... ' After this message , kernel panic happened. How to fix this error ? I've tried to fix according to a patch which got by a link http://lkml.iu.edu//hypermail/linux/kernel/1202.3/01416.html , but I've found that it was already modified. ==================================== Starting kernel ... Uncompressing Linux... done, booting the kernel. [ 0.000000] Booting Linux on physical CPU 0xa00 [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Linux version 3.8.13.16 (taeung@taeung-MS-7798) (gcc version 4.7.3 20130102 (prerelease) (crosstool-NG linaro-1.13.1-4.7-201) [ 0.000000] Kernel was built at commit id '' [ 0.000000] CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=10c5387d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache [ 0.000000] Machine: NANOPC_T1 [ 0.000000] TINY4412: S70 selected ...(omitted)... [ 2.767528] dm9620 1-2.1:1.0 eth0: register 'dm9620' at usb-s5p-ehci-2.1, Davicom DM9620 USB Ethernet, 00:00:ff:ff:00:00 [ 2.852918] usb 1-2.5: new high-speed USB device number 4 using s5p-ehci [ 2.958420] usb 1-2.5: New USB device found, idVendor=0424, idProduct=2530 [ 2.958504] usb 1-2.5: New USB device strings: Mfr=0, Product=2, SerialNumber=0 [ 2.958582] usb 1-2.5: Product: Bridge device [ 3.250493] init: ureadahead main process (1392) terminated with status 5 [ 3.847855] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null) [ OK ]ting up X socket directories... [ 6.572778] BUG: rwlock bad magic on CPU#3, modprobe/1909, e676f3cc [ 6.572867] [<c0014ed8>] (unwind_backtrace+0x0/0xf8) from [<c01cbbf4>] (do_raw_write_lock+0x84/0xb4) [ 6.573022] [<c01cbbf4>] (do_raw_write_lock+0x84/0xb4) from [<bf023064>] (fib6_clean_all+0x44/0x94 [ipv6]) [ 6.575560] [<bf023064>] (fib6_clean_all+0x44/0x94 [ipv6]) from [<bf023100>] (fib6_run_gc+0x4c/0xd0 [ipv6]) [ 6.585312] [<bf023100>] (fib6_run_gc+0x4c/0xd0 [ipv6]) from [<bf025d34>] (ndisc_netdev_event+0x44/0xf4 [ipv6]) [ 6.595352] [<bf025d34>] (ndisc_netdev_event+0x44/0xf4 [ipv6]) from [<c03839c4>] (unregister_netdevice_notifier+0xa4/0xcc) [ 6.606367] [<c03839c4>] (unregister_netdevice_notifier+0xa4/0xcc) from [<bf027928>] (ndisc_cleanup+0x14/0x30 [ipv6]) [ 6.616972] [<bf027928>] (ndisc_cleanup+0x14/0x30 [ipv6]) from [<bf052204>] (inet6_init+0x204/0x274 [ipv6]) [ 6.626657] [<bf052204>] (inet6_init+0x204/0x274 [ipv6]) from [<c0008708>] (do_one_initcall+0x110/0x178) [ 6.636092] [<c0008708>] (do_one_initcall+0x110/0x178) from [<c0067a58>] (load_module+0x17fc/0x1d20) [ 6.645200] [<c0067a58>] (load_module+0x17fc/0x1d20) from [<c0068054>] (sys_init_module+0xd8/0xec) [ 6.654140] [<c0068054>] (sys_init_module+0xd8/0xec) from [<c000e300>] (ret_fast_syscall+0x0/0x30) [ 6.663082] Unable to handle kernel NULL pointer dereference at virtual address 00000005 [ 6.671147] pgd = e6734000 [ 6.673838] [00000005] *pgd=00000000 [ 6.677387] Internal error: Oops: 5 [#1] PREEMPT SMP ARM [ 6.682679] Modules linked in: ipv6(+) gpio_keys wm8960(O) [ 6.688150] CPU: 3 Tainted: G O (3.8.13.16 #1) [ 6.693834] PC is at fib6_walk_continue+0xcc/0x1b4 [ipv6] [ 6.699207] LR is at fib6_walk+0x48/0x98 [ipv6] [ 6.703688] pc : [<bf0217ac>] lr : [<bf021a70>] psr: 80000013 [ 6.703688] sp : e6731d80 ip : 7fa980b8 fp : bf022ef0 [ 6.715143] r10: 00000000 r9 : 00000000 r8 : 00000001 [ 6.720350] r7 : 00000003 r6 : 00000002 r5 : 00000000 r4 : e6731dac [ 6.726861] r3 : 00000000 r2 : 00000000 r1 : 00000001 r0 : 00000001 [ 6.733372] Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 6.740489] Control: 10c5387d Table: 6673404a DAC: 00000015 [ 6.746218] Process modprobe (pid: 1909, stack limit = 0xe6730240) [ 6.752380] Stack: (0xe6731d80 to 0xe6732000) [ 6.756723] 1d80: e6731dac bf042e40 00000000 c09b2dc0 bf0218fc bf021a70 e676f3c0 e676f3cc [ 6.764882] 1da0: 00000000 bf023090 bf042f9c bf042e50 bf042e50 e676f3dc 00000001 bf042e94 [ 6.773040] 1dc0: 00000000 00000000 00000000 bf022ef0 00000000 c09b2dc0 bf0218fc 00000000 [ 6.781199] 1de0: 00000000 c09b2dc0 bf044830 c09b2e38 c09b2dc0 c09b2d54 bf052000 00000000 [ 6.789359] 1e00: 00000000 bf023100 bf025cf0 e7278000 c09b2dc0 bf025d34 e7278000 bf042fd8 [ 6.797518] 1e20: c09b2e38 c03839c4 00000000 bf042e94 bf0438f0 bf044628 00000001 e72fa6c0 [ 6.805678] 1e40: e6730000 bf027928 fffffff4 bf052204 c09b8d00 e6731f58 bf044634 c0008708 [ 6.813836] 1e60: 00000001 e72fa6c0 bf044670 8040003d e68457c0 f0301000 00000001 e72fa6c0 [ 6.821996] 1e80: bf044670 e6731f58 bf044634 bf044628 00000001 e72fa6c0 bf044670 00000001 [ 6.830155] 1ea0: c0065178 c0067a58 bf044634 00007fff c00647ac c002b078 00000000 00000000 [ 6.838314] 1ec0: c0065200 bf044634 e6730000 c09785cc bf044764 e6731ef4 ffffffff e6731f1c [ 6.846473] 1ee0: 6575715f c000de98 f0969000 b6d58000 00000476 bf03d950 00000023 bf03da68 [ 6.854632] 1f00: 00000021 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 6.862791] 1f20: 00000000 00000000 00000000 00000000 000000d2 006684f6 b66f0000 b6f04fa8 [ 6.870950] 1f40: 00000080 c000e4a8 e6730000 00000000 00000000 c0068054 f0301000 006684f6 [ 6.879110] 1f60: f07b40b4 f07b3e7c f0962fc4 00035e40 0003cd50 00000000 00000000 00000000 [ 6.887269] 1f80: 00000038 00000039 00000021 00000000 00000014 00000000 b6f05be4 00040000 [ 6.895428] 1fa0: b6f61250 c000e300 b6f05be4 00040000 b66f0000 006684f6 b6f04fa8 00000...stripped-down