[PATCH 2.4] i2c cleanups

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On Tue, 23 Dec 2003, Jean Delvare wrote:

> > Jean, here is something to start with. Tested to apply cleanly
> > over 2.4.23 after your set of 4 patches.
> >
> > Patch -km-1 :
> >
> > Remove code for KERNEL_VERSION tests.
>
> Great. This was on my TODO list. I think I'll tweak it a bit, to remove
> version.h includes which aren't necessary anymore (I guess) and merge
> empty lines where it applies. Also, this patch might conflict with the
> one I wrote on posted to the list yesterday (which cleans modules
> init/exit handling). But basically you got it, this is something I
> wanted to send to Marcelo.
>
> > Patch -km-2 :
> >
> > This has .owner and .inc/dec_use for reference counting. Also, C99
> > initializers and initcalls are imported from i2c CVS head.
>
> What are initcalls.
>
> > No new drivers, SMBus commands or driver ID's.
>
> Good point.
>
> > This is about 1/4 of changes needed to bring 2.4.24 in-sync with i2c
> > 2.8.2.
>
> Sure this is an important part, this is even the reason why all these
> started.
>
> But there's a problem. As discussed on the list the last few days, i2c
> as of CVS head does not handle module reference counting correctly. So
> we cannot possibly send this patch to Marcelo before this issue is
> fixed. Since you seem to know how to fix it, please commit the
> necessary changes to CVS head (I don't think it is a good idea to
> branch the CVS, it's just not worth it). I do well understand that,
> even with the fix, the reference counting will be broken, but at least
> it won't be worse than in the previous implementation (that is, moving
> into /proc/.../somechip/ increases the chip use count, but not the bus
> use count). This is required before we can send any inc/dec-to-owner
> patch to Marcelo.
>
> > At least i2c-proc is not yet in sync with 2.8.0, so sensor chips
> > will not build.
>
> This was expected. They don't build either as of now anyway ;)
>
> > I probably forgot some tiny parts elsewhere too but seems
> > you were working on similar cleanups so maybe this is some
> > assistance.
>
> Your help is very appreciated, since there is much much work to do and
> we are runnign out of time.
>
> > We cannot get 200kB+ patches through anyway.
>
> Yes, that's the idea (and I don't consider it a problem, since this
> ensures that what we are sending is valid and doesn't bring any
> regression into the kernel tree).
>
> > I'll prepare some more patches today. Driver ID's, SMBus commands,
> > and i2c-proc. The in-file revision tag $id has not been in sync with
> > CVS files for ages and I plan to unexpand them with a separate
> > patch.
>
> IDs is an easy and independant patch, I should be able to go with it if
> you don't.
>
> New SMBus commands are not to be commited for now, if ever. They are
> new
> functionalities, I doubt Marcelo will want them into Linux 2.4.
>
> The i2c-proc patches (and anything related to the core or spread over
> all drivers) are what is more important, both because it might need to
> be done before other minor changes, and because I don't understand it
> too well, so that's where your help will be really precious.
>
> Thanks a lot for providing assistance in backporting CVS to Linux 2.4.
> Keep in mind that all changes have to be as sliced as possible if we
> want them accepted.
>
> I will be submitting a new wave of patches to Marcelo rather soon, which
> should include (list is not definitive):
> - init/exit cleanups (me)
> - compatibility cleanups (you)
> - velleman doc (me)
> - algo debug stuff removal (me)
>
> I'll let you know as soon as I'm working on other patches so that we can
> merge our efforts efficiently.
>
> Thanks again.
>
>

-- 
  Ky?sti M?lkki  <kyosti.malkki at welho.com>  +358 50 462 8786



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