[linux-dvb] Re: Experience building DVS dvb-kernel on 2.4.18 forbudget Nova-T

[Michael Hunold]

Hello Stephen,

I pulled it from the CVS - yesterday's version (2003-01-26).

Ok, thanks for your feedback.

Here is my experience:

1) 2.4.18 kernel doesn't export get_user_pages

  I just modified and rebuilt my kernel with this symbol exported.

Ok. It seems that this is really distribution specific -- with the RedHat patched 2.4.18-3 kernel that came with my RedHat 7.3 I could compile the driver.

Anyway, with a recent and offical 2.4.20 kernel, "get_user_pages()" gets exported.

2) Had some problems with GPLONLY symbols in saa7146*.c and video-buf.c

  I don't really understand this stuff properly - I just replaced the
  EXPORT_SYMBOL_GPL with a regular EXPORT_SYMBOL

Hmm, I never encountered these problems.

3) "unlikely" was unknown in video-buf.c

  Probably because my gcc is version 2.95.3.  I just defined
  unlikely with "#define unlikely(x) (x)"

Is it really a compiler thing? I use
> gcc version 2.96 20000731 (Red Hat Linux 7.3 2.96-110)
and never got this error.

4) in compat.[hc], vmalloc_to_page included for all kernels <2.5.0.

  My kernel, at least, does have this exported.  Perhaps that's not
  standard.  In any event, I changed the compat.c and compat.h to
  only include it for versions <2.4.18

These stuff has been re-introduced into compat.[ch] and the one who did that was not aware that it's exported for kernels > 2.4.18. I don't have any compile problems, though.

5) In video-buf.c, BUG_ON wasn't defined

  This was only introduced in 2.4.20.  There is a define for it in
  saa7146.h, but video-buf.c doesn't #include that.
  I changed video-buf.c to include saa7146.h

"video-buf" is a helper module that's not part of the dvb/saa7146 driver, so it should not include saa7146.h. Instead, it should include <linux/kernel.h> directly probably.

With this lot adjusted, the driver built and showed signs of working.
My problem then was that dvbstream would capture a few seconds of video
and then data would stop.  In the syslog, the fidbirqs would stop too.
This seemed to correspond to a call to budget_diseqc_ioctl - which was
odd because I didn't see in dvbstream where such an ioctl was called.

Unfortunately, I cannot comment on all that follows.

Thanks, hope this feedback is helpful.
Steve

CU
Michael.




--
Info:
To unsubscribe send a mail to [EMAIL PROTECTED] with "unsubscribe linux-dvb" as subject.