linux-kernel - Re: [GIT PATCH] driver core merge for 3.3

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Date:	Fri, 6 Jan 2012 22:38:41 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Greg KH <gregkh@...e.de>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Ben Hutchings <ben@...adent.org.uk>,
	Linux-Arch <linux-arch@...r.kernel.org>
Subject: Re: [GIT PATCH] driver core merge for 3.3

On Fri, Jan 6, 2012 at 21:11, Greg KH <gregkh@...e.de> wrote:
> Ben Hutchings (1):
>      topology: Provide CPU topology in sysfs in !SMP configurations

FWIW, as reported before, I can confirm that 3.2.0-next-20120106 crashes
on m68k during boot:

Console: switching to colour frame buffer device 80x30
fb0: frame buffer device, using 304K of video memory
Non-volatile memory driver v1.3
Unable to handle kernel NULL pointer dereference at virtual address 00000020
Oops: 00000000
Modules linked in:
PC: [<000c3f72>] internal_create_group+0x20/0x1ba
SR: 2304  SP: 00c07f10  a2: 00c05c00
d0: 00000000    d1: fffff24b    d2: 00000000    d3: 00000000
d4: 00000000    d5: 002f0a28    a0: 00000008    a1: 002e306e
Process swapper (pid: 1, task=00c05c00)
Frame format=7 eff addr=00000020 ssw=0505 faddr=00000020
wb 1 stat/addr/data: 0000 00000000 00000000
wb 2 stat/addr/data: 0000 00000000 00000000
wb 3 stat/addr/data: 0000 00000020 00000000
push data: 00000000 00000000 00000000 00000000
Stack from 00c07f78:
        00000000 00000000 00000000 00000000 00000000 0033d5f0 0033641e 00326632
        00000000 002e1ff8 000c4130 00000008 00000000 002f0a28 00336436 00000008
        002f0a28 00000000 0000210c 00000000 00000000 00000000 00000000 00000000
        00000000 0033d5f0 00002008 00326632 0031dae2 0033641e 0031da66 000249b6
        00002f04 00000000
Call Trace: [<0033641e>] topology_sysfs_init+0x0/0x1e
 [<00326632>] __alloc_bootmem+0x0/0x1a
 [<000c4130>] sysfs_create_group+0xe/0x14
 [<00336436>] topology_sysfs_init+0x18/0x1e
 [<0000210c>] do_one_initcall+0x104/0x19a
 [<00002008>] do_one_initcall+0x0/0x19a
 [<00326632>] __alloc_bootmem+0x0/0x1a
 [<0031dae2>] kernel_init+0x7c/0x11c
 [<0033641e>] topology_sysfs_init+0x0/0x1e
 [<0031da66>] kernel_init+0x0/0x11c
 [<000249b6>] printk+0x0/0x1a
 [<00002f04>] kernel_thread+0x3a/0x4e

Code: 2a2e 0010 4a86 6700 0162 4a84 660a 2046 <4aa8> 0018 6700 0154
4a84 6600 0122 2045 2010 6700 0128 486e fffc 2f00 2f06 61ff
Disabling lock debugging due to kernel taint
Kernel panic - not syncing: Attempted to kill init!

Reverting the above commit (ccbc60d3e19a1b6ae66ca0d89b3da02dde62088b)
fixes it.

So to preserve bisectability, you may want to drop this ommit until the
UP-only archs have been fixed.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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