kernel boot failure on with s32440/mini2440 with git head (dd59f6c76b2)

[Ben Dooks]

Juergen Beisert wrote:
> On Sonntag, 20. Dezember 2009, Gaye Abdoulaye Walsimou wrote:
>> Hello list,
>> I have here a boot Oops (see below) with the latest git revision of
>> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git,
>> which does not happen with 2.6.32.
>> Thanks in advance for comments.
>> Regards
>>
>> ####Boot log ####
>>
>> Uncompressing
>> Linux......................................................................
>> ..................................... Linux version
>> 2.6.33-rc1-00096-gdd59f6c
>> (walsimou at wnotebook02.walsimou.com) (gcc version 4.4.2 (GCC) ) #71
>> PREEMPT Sun Dec 209
>> CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c0007177
>> CPU: VIVT data cache, VIVT instruction cache
>> Machine: MINI2440
>> Memory policy: ECC disabled, Data cache writeback
>> CPU S3C2440A (id 0x32440001)
>> S3C24XX Clocks, Copyright 2004 Simtec Electronics
>> S3C244X: core 400.000 MHz, memory 100.000 MHz, peripheral 50.000 MHz
>> CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on
>> Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
>> Kernel command line: root=/dev/ram rw rootfstype=initramfs
>> console=ttySAC0,115200 user_debug=31 rdinit=/sbin/init
>> PID hash table entries: 256 (order: -2, 1024 bytes)
>> Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
>> Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
>> Memory: 64MB = 64MB total
>> Memory: 56568KB available (2476K code, 364K data, 5460K init, 0K highmem)
>> Hierarchical RCU implementation.
>> NR_IRQS:85
>> irq: clearing subpending status 00000003
>> irq: clearing subpending status 00000002
>> Console: colour dummy device 80x30
>> console [ttySAC0] enabled
>> Calibrating delay loop... 199.47 BogoMIPS (lpj=498688)
>> Mount-cache hash table entries: 512
>> CPU: Testing write buffer coherency: ok
>> NET: Registered protocol family 16
>> MINI2440: Option string mini2440=0tb
>> MINI2440: 't' ignored, touchscreen not compiled in
>> MINI2440: LCD [0:240x320] 1:800x480 2:1024x768
>> Unable to handle kernel NULL pointer dereference at virtual address
>> 00000000 pgd = c0004000
>> [00000000] *pgd=00000000
>> Internal error: Oops: 5 [#1] PREEMPT
>> last sysfs file:
>> Modules linked in:
>> CPU: 0    Not tainted  (2.6.33-rc1-00096-gdd59f6c #71)
>> PC is at memcpy+0x64/0x29c
>> LR is at kmemdup+0x30/0x38
>> pc : [<c065bfc4>]    lr : [<c05b529c>]    psr: 00000013
>> sp : c381dee4  ip : 0000001c  fp : c381df1c
>> r10: c0556690  r9 : 00000000  r8 : c07cccc8
>> r7 : c07cc640  r6 : 00000000  r5 : c3854360  r4 : 00000004
>> r3 : c3805400  r2 : ffffffe4  r1 : 00000000  r0 : c3854360
>> Flags: nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
>> Control: c000717f  Table: 30004000  DAC: 00000017
>> Process swapper (pid: 1, stack limit = 0xc381c270)
>> Stack: (0xc381dee4 to 0xc381e000)
>> dee0:          c3854360 00000000 c07cc640 c07cccc8 c3854360 00000004
>> c05b529c
>> df00: c3854380 00000000 c38543a0 c07cc640 c381df3c c381df20 c000efb0
>> c05b527c
>> df20: 00000003 0000006c c0556804 c07cc640 c381df94 c381df40 c000db0c
>> c000ef20
>> df40: c06a6f7c 00000002 00000003 00000000 c07cc640 c0556690 00000000
>> 00000000
>> df60: 00000000 00000000 00000000 00000000 c000b6a0 c001f88c 00000001
>> 00000000
>> df80: 00000000 00000000 c381dfa4 c381df98 c000b6c0 c000d898 c381dfdc
>> c381dfa8
>> dfa0: c055d3e0 c000b6b0 00000054 c07d2108 00000000 00000000 c381dfdc
>> c001f634
>> dfc0: c001f88c 00000000 00000000 00000000 c381dff4 c381dfe0 c0008600
>> c055d388
>> dfe0: 00000000 00000000 00000000 c381dff8 c0575868 c0008560 33cc33cc
>> 33cc37cc
>> Backtrace:
>> [<c05b526c>] (kmemdup+0x0/0x38) from [<c000efb0>]
>> (s3c_nand_set_platdata+0xa0/0x10c)
>>  r7:c07cc640 r6:c38543a0 r5:00000000 r4:c3854380
>> [<c000ef10>] (s3c_nand_set_platdata+0x0/0x10c) from [<c000db0c>]
>> (mini2440_init+0x284/0x30c)
>>  r7:c07cc640 r6:c0556804 r5:0000006c r4:00000003
>> [<c000d888>] (mini2440_init+0x0/0x30c) from [<c000b6c0>]
>> (customize_machine+0x20/0x2c)
>> [<c000b6a0>] (customize_machine+0x0/0x2c) from [<c055d3e0>]
>> (do_one_initcall+0x68/0x1c4)
>> [<c055d378>] (do_one_initcall+0x0/0x1c4) from [<c0008600>]
>> (kernel_init+0xb0/0x12c)
>>  r8:00000000 r7:00000000 r6:00000000 r5:c001f88c r4:c001f634
>> [<c0008550>] (kernel_init+0x0/0x12c) from [<c0575868>] (do_exit+0x0/0x650)
>>  r5:00000000 r4:00000000
>> Code: e4915004 e4916004 e4917004 e4918004 (e491e004)
>> ---[ end trace 2719ed1c0000000a ]---
>> Kernel panic - not syncing: Attempted to kill init!
>> Backtrace:
>> [<c05618a0>] (dump_backtrace+0x0/0x114) from [<c074268c>]
>> (dump_stack+0x18/0x1c)
>>  r7:00000005 r6:c3819c40 r5:c07d0080 r4:c07de690
>> [<c0742674>] (dump_stack+0x0/0x1c) from [<c07426e4>] (panic+0x54/0x12c)
>> [<c0742690>] (panic+0x0/0x12c) from [<c05758d8>] (do_exit+0x70/0x650)
>>  r3:c07d0080 r2:00000002 r1:c381dd44 r0:c0799fb8
>> [<c0575868>] (do_exit+0x0/0x650) from [<c0561db8>] (die+0x190/0x1b4)
>> [<c0561c28>] (die+0x0/0x1b4) from [<c05635fc>]
>> (__do_kernel_fault+0x6c/0x7c) [<c0563590>] (__do_kernel_fault+0x0/0x7c)
>> from [<c05637d8>]
>> (do_page_fault+0x1cc/0x1e4)
>>  r7:00000000 r6:00000000 r5:c381de9c r4:c3819c40
>> [<c056360c>] (do_page_fault+0x0/0x1e4) from [<c0563894>]
>> (do_translation_fault+0x18/0x7c)
>> [<c056387c>] (do_translation_fault+0x0/0x7c) from [<c055d314>]
>> (do_DataAbort+0x3c/0xa0)
>>  r7:c381de9c r6:00000000 r5:c07cbd40 r4:00000005
>> [<c055d2d8>] (do_DataAbort+0x0/0xa0) from [<c055db00>]
>> (__dabt_svc+0x40/0x60)
>> Exception stack(0xc381de9c to 0xc381dee4)
>> de80:
>> c3854360
>> dea0: 00000000 ffffffe4 c3805400 00000004 c3854360 00000000 c07cc640
>> c07cccc8
>> dec0: 00000000 c0556690 c381df1c 0000001c c381dee4 c05b529c c065bfc4
>> 00000013
>> dee0: ffffffff
>>  r7:c07cc640 r6:00000000 r5:c381ded0 r4:ffffffff
>> [<c05b526c>] (kmemdup+0x0/0x38) from [<c000efb0>]
>> (s3c_nand_set_platdata+0xa0/0x10c)
>>  r7:c07cc640 r6:c38543a0 r5:00000000 r4:c3854380
>> [<c000ef10>] (s3c_nand_set_platdata+0x0/0x10c) from [<c000db0c>]
>> (mini2440_init+0x284/0x30c)
>>  r7:c07cc640 r6:c0556804 r5:0000006c r4:00000003
>> [<c000d888>] (mini2440_init+0x0/0x30c) from [<c000b6c0>]
>> (customize_machine+0x20/0x2c)
>> [<c000b6a0>] (customize_machine+0x0/0x2c) from [<c055d3e0>]
>> (do_one_initcall+0x68/0x1c4)
>> [<c055d378>] (do_one_initcall+0x0/0x1c4) from [<c0008600>]
>> (kernel_init+0xb0/0x12c)
>>  r8:00000000 r7:00000000 r6:00000000 r5:c001f88c r4:c001f634
>> [<c0008550>] (kernel_init+0x0/0x12c) from [<c0575868>] (do_exit+0x0/0x650)
>>  r5:00000000 r4:00000000
> 
> Some (or most?) of the __initdata are bogus in the 
> arch/arm/mach-s3c2440/mach-mini2440.c. You must remove them.

this is becoming less true, the problem here is the nand code
that fails to correctly set the platform data after copying it.

A fix has been pull-requested.

Please don't go round removing the initdata just yet.