From: Paul H. Hargrove (PHHargrove_at_lbl_dot_gov)
Date: Sun Dec 20 2009 - 13:48:13 PST
Alan Woodland wrote:
> 2009/12/19 Alan Woodland <alan.woodland_at_gmail_dot_com>:
>
>> 2009/12/18 Paul H. Hargrove <PHHargrove_at_lbl_dot_gov>:
>>
>>> Paul H. Hargrove wrote:
>>>
>>>> Alan Woodland wrote:
>>>>
>>>>> 2009/12/18 Yuri D'Elia <yuri.delia_at_eurac_dot_edu>:
>>>>>
>>>>>
>>>>>> Just tried to see the dkms boot script in action...
>>>>>>
>>>>>> checking kernel symbol table for exported register_chrdev... not found
>>>>>> ======================================================================
>>>>>> Please review the following configuration information:
>>>>>> Kernel source directory = /lib/modules/2.6.32-trunk-amd64/build
>>>>>> Kernel build directory = /lib/modules/2.6.32-trunk-amd64/build
>>>>>> Kernel symbol table = /boot/System.map-2.6.32-trunk-amd64
>>>>>> Kernel version probed from kernel build = 2.6.32-trunk-amd64
>>>>>> Kernel running currently = 2.6.32-trunk-amd64
>>>>>> ======================================================================
>>>>>> configure: error: Unable to use kernel 2.6.32-trunk-amd64 - kernel does
>>>>>> not export register_chrdev
>>>>>>
>>>>>> whoops :|
>>>>>>
>>>>>>
>>>>> Looks like things changed a bit in 2.6.32 again. I'm not going to have
>>>>> time to look at it properly until the new year, although possibly
>>>>> someone upstream has already encountered this one?
>>>>>
>>>>> Alan
>>>>>
>>>>>
>>>>>
>>>> Regretfully, I also don't expect to look at this much until January.
>>>> I'll try look today to see if it is something quick, but doubt that it
>>>> will be.
>>>>
>>>> -Paul
>>>>
>>>>
>>> Good news. This DID turn out to be a small/easy change. With the attached
>>> patch (in addition to the patch for 2.6.31 support) I can configure, build
>>> and pass "make check" with a 2.6.32 kernel (from kernel.org) on a PPC64
>>> machine.
>>>
>> Thanks, I'll try and push an update to Debian sometime today with this
>> patch applied.
>>
>>
> Seems to be a bit of a hiccup with the patch, build now fails with:
>
> make -C /lib/modules/2.6.32-trunk-amd64/build
> SUBDIRS=/var/lib/dkms/blcr/0.8.2/build/blcr_imports/kbuild modules
> CC="gcc"
> make[1]: Entering directory `/usr/src/linux-headers-2.6.32-trunk-amd64'
> CC [M] /var/lib/dkms/blcr/0.8.2/build/blcr_imports/kbuild/imports.o
> {standard input}: Assembler messages:
> {standard input}:5: Error: undefined symbol
> `CR_EXPORTED_KCODE_register_chrdev' in operation
> {standard input}:9: Error: undefined symbol
> `CR_EXPORTED_KCODE_register_chrdev' in operation
> {standard input}:13: Error: undefined symbol
> `CR_EXPORTED_KCODE_register_chrdev' in operation
> {standard input}:17: Error: undefined symbol
> `CR_EXPORTED_KCODE_register_chrdev' in operation
> {standard input}:21: Error: undefined symbol
> `CR_EXPORTED_KCODE_register_chrdev' in operation
> {standard input}:25: Error: undefined symbol
> `CR_EXPORTED_KCODE_register_chrdev' in operation
> {standard input}:29: Error: undefined symbol
> `CR_EXPORTED_KCODE_register_chrdev' in operation
> {standard input}:33: Error: undefined symbol
> `CR_EXPORTED_KCODE_register_chrdev' in operation
> {standard input}:37: Error: undefined symbol
> `CR_EXPORTED_KCODE_register_chrdev' in operation
> {standard input}:41: Error: undefined symbol
> `CR_EXPORTED_KCODE_register_chrdev' in operation
> {standard input}:45: Error: undefined symbol
> `CR_EXPORTED_KCODE_register_chrdev' in operation
> {standard input}:49: Error: undefined symbol
> `CR_EXPORTED_KCODE_register_chrdev' in operation
>
> (repeats quite a bit more)
>
> If I've read it right I think include/blcr_ksyms.h needs to be patched
> too, which wasn't touched in the patch you posted. I've attached my
> quick hack that now builds and can be inserted into the kernel ok. I
> will hold off on uploads for confirmation that it's sane and tests
> results to finish running.
>
> Alan
>
Alan is correct (as is his patch) about blcr_ksyms.h.
I didn't notice the problem because I tested on PPC64 w/o
CONFIG_RELOCATABLE.
Thanks,
-Paul
--
Paul H. Hargrove PHHargrove_at_lbl_dot_gov
Future Technologies Group Tel: +1-510-495-2352
HPC Research Department Fax: +1-510-486-6900
Lawrence Berkeley National Laboratory