lkml.org 
[lkml]   [2007]   [Nov]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [v4l-dvb-maintainer] bttv build error (CONFIG_NET=n)
From
Date
Randy,

> > The only reason the net stuff works, is because CONFIG_NET includes igmp.c,
> > which can't be compiled as a module. That means ip_compute_csum() will get
> > pulled out of the lib.a file for igmp, and thus be present for the net modules
> > that use it too. If igmp could be turned off, made a module, or stopped using
> > ip_compute_csum(), then the users of ip_compute_csum() that do depend on
> > CONFIG_NET would have the same problem as bttv does.
>
> Thanks for the analysis and summary.
> (I'm still waiting for those lkml.org links to load... timed out)
>
> > It seems a shame to create a new ip checksum function in the bttv driver when
> > a perfectly good one already exists and will already be present in just about
> > every kernel out there. Honestly, how common is NET=n and VIDEO_BT848=m
> > outside of randconfig?

This might happen on embedded devices, like a set top box or a PVR,
using a bttv hardware.

> so just adding "depends on NET" should be OK then?

Seems very weird to have bttv module dependent on NET, just because a
checksum calculus function is defined there.

One possible solution would be to move this function to another place
and having both NET, BTTV and other places selecting it.

--
Cheers,
Mauro

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-11-01 09:31    [W:0.062 / U:0.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site