general module gottcha...

general module gottcha...

[Iain Sandoe]

Wed, Jul 12, 2000, Derek Homeier wrote:
> On Wed, 12 Jul 2000, Iain Sandoe wrote:
>>
>> > I did compile dmasound as module (I noticed that after applyiing your
patch,
>> > dmasound was unselected in .config - is there a reason for this?).
>>
>> Yes, the CONFIG_DMASOUND changed to a set of CONFIG_DMASOUND_XXXX for the
>> various different platforms.  Note there is no such thing as 'dmasound.o'
>> any more :-)
>>
>> you have to modprobe:
>> soundcore
>> dmasound_core <params>
>> dmasound_awacs
>>
> Ay, that may be the rub! I think I've still seen 'dmasound.o' when I did
> a lsmod. I did not change conf.modules, that's for sure.
> I have no idea, though, where I might have got the old dmasound.o from,
> because I made a 'mrproper' before the last compiles.

This is because (as things stand) modules_install does *not* remove un-built
modules - just overwrites rebuilt ones with the new versions...

This is probably the only sensible behaviour (gurus?)...

I am (usually) paranoid and do a:
 rm -rf /lib/modules/kernel-version-i'm-working-on

before doing modules_install :-)

> I can imagine that
> would have messed up everything a bit, though I'm wondering how the
> module got loaded with the wrong kernel version at all...

Hmmm.. it's probably a little too tolerant - I have module versioning
switched on in all my compiles and that is quite successful at whining when
you've forgotten to delete/update something.

Iain.

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Re: general module gottcha...

[Derek Homeier]

On Wed, 12 Jul 2000, Iain Sandoe wrote:

>
> Wed, Jul 12, 2000, Derek Homeier wrote:

> > Ay, that may be the rub! I think I've still seen 'dmasound.o' when I did
> > a lsmod. I did not change conf.modules, that's for sure.
> > I have no idea, though, where I might have got the old dmasound.o from,
> > because I made a 'mrproper' before the last compiles.
>
> This is because (as things stand) modules_install does *not* remove un-built
> modules - just overwrites rebuilt ones with the new versions...
>
> This is probably the only sensible behaviour (gurus?)...
>
> I am (usually) paranoid and do a:
>  rm -rf /lib/modules/kernel-version-i'm-working-on
>
> before doing modules_install :-)
>
I was quite aware of that, and recreated the modules dir several times,
also because I built three versions in a series and moved the corresponding
modules to a different place. I may have missed something there, though.

> > I can imagine that
> > would have messed up everything a bit, though I'm wondering how the
> > module got loaded with the wrong kernel version at all...
>
> Hmmm.. it's probably a little too tolerant - I have module versioning
> switched on in all my compiles and that is quite successful at whining when
> you've forgotten to delete/update something.
>
Good idea! Where do you enable that?

Cheers,
							Derek


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