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scary warning in atags.c -- 2.6.34-rc1

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Pavel Machek

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Mar 13, 2010, 5:40:02 AM3/13/10
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Hi!

Scary warning on HTC Dream:

[ 0.220000] ------------[ cut here ]------------
[ 0.220000] WARNING: at arch/arm/kernel/atags.c:60
init_atags_procfs+0x5c/0xe8()
[ 0.220000] Modules linked in:
[ 0.220000] [<c0025250>] (unwind_backtrace+0x0/0xdc) from
[<c0032e1c>] (warn_slowp)
[ 0.220000] [<c0032e1c>] (warn_slowpath_common+0x4c/0x80) from
[<c000b4b8>] (init_)
[ 0.220000] [<c000b4b8>] (init_atags_procfs+0x5c/0xe8) from
[<c002033c>] (do_one_i)
[ 0.220000] [<c002033c>] (do_one_initcall+0x5c/0x1bc) from
[<c0008584>] (kernel_in)
[ 0.220000] [<c0008584>] (kernel_init+0x94/0x148) from [<c00217b4>]
(kernel_thread)
[ 0.220000] ---[ end trace 1b75b31a2719ed1c ]---
[ 0.230000] bio: create slab <bio-0> at 0
[ 0.230000] Switching to clocksource dg_timer

Hmm, what are atags anyway?
Pavel
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Marek Vasut

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Mar 13, 2010, 8:20:02 AM3/13/10
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Dne So 13. března 2010 11:39:13 Pavel Machek napsal(a):

> Hi!
>
> Scary warning on HTC Dream:
>
> [ 0.220000] ------------[ cut here ]------------
> [ 0.220000] WARNING: at arch/arm/kernel/atags.c:60
> init_atags_procfs+0x5c/0xe8()
> [ 0.220000] Modules linked in:
> [ 0.220000] [<c0025250>] (unwind_backtrace+0x0/0xdc) from
> [<c0032e1c>] (warn_slowp)
> [ 0.220000] [<c0032e1c>] (warn_slowpath_common+0x4c/0x80) from
> [<c000b4b8>] (init_)
> [ 0.220000] [<c000b4b8>] (init_atags_procfs+0x5c/0xe8) from
> [<c002033c>] (do_one_i)
> [ 0.220000] [<c002033c>] (do_one_initcall+0x5c/0x1bc) from
> [<c0008584>] (kernel_in)
> [ 0.220000] [<c0008584>] (kernel_init+0x94/0x148) from [<c00217b4>]
> (kernel_thread)
> [ 0.220000] ---[ end trace 1b75b31a2719ed1c ]---
> [ 0.230000] bio: create slab <bio-0> at 0
> [ 0.230000] Switching to clocksource dg_timer
>
> Hmm, what are atags anyway?
> Pavel
>
Atags are data passed by the bootloader to kernel (like memory size, machine id
...).

Russell King - ARM Linux

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Mar 14, 2010, 8:10:01 AM3/14/10
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Your bootloader is broken - it doesn't terminate the ATAG list correctly.
You'd have thought that getting two values correct would be simple...

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