Re: 2.6.24-rc5-mm1

Adrian Bunk
2007-12-13T17:54:59Z

On Thu, Dec 13, 2007 at 05:07:44PM +0100, Borislav Petkov wrote:
> On Thu, Dec 13, 2007 at 04:01:34PM +0100, Benjamin Thery wrote:
> > The problem comes from the new macro UDPX_INC_STATS_BH introduced
> > by Herbert, which was a nice addition to increment the correct
> > UDP MIB depending on the socket family, but unfortunately
> > the use of this macro from kernel code (I mean code not compiled
> > as module) requires that IPv6 is also compiled in kernel
> > (CONFIG_IPv6=y) in order to have udp_stats_in6 defined at link
> > time.
> >
> > Benjamin
> >
> > Pierre Peiffer wrote:
> > > Hi,
> > >
> > > My config does not link any more:
> > >
> > > ...
> > > CHK include/linux/compile.h
> > > UPD include/linux/compile.h
> > > CC init/version.o
> > > LD init/built-in.o
> > > LD .tmp_vmlinux1
> > > net/built-in.o: In function `xs_udp_data_ready':
> > > /home/peifferp/containers/kernel/linux-2.6.24-rc5-mm1/net/sunrpc/xprtsock.c:842:
> > > undefined reference to `udp_stats_in6'
> > > /home/peifferp/containers/kernel/linux-2.6.24-rc5-mm1/net/sunrpc/xprtsock.c:846:
> > > undefined reference to `udp_stats_in6'
> > > make[1]: *** [.tmp_vmlinux1] Error 1
> > > make: *** [sub-make] Error 2
> > >
> > > After a first look, udp_stats_in6 seems to be defined in ipv6 (file
> > > net/ipv6/udp.c) but I have
> > >
> > > CONFIG_IPV6=m
> > > and
> > > CONFIG_SUNRPC=y
> > >
> > > So, SUNRPC uses something defined in a module in my case ?
> > >
> > > ... looking more, this dependency seems to have been introduced by the patch
> > > [UDP]: Restore missing inDatagrams increments
> > > ( http://thread.gmane.org/gmane.linux.network/79716/focus=79831 )
> > >
> > > (I cc netdev)
> > >
> > > I don't know what is the right way to fix this ... ?
>
> you might do "select IPV6" in the SUNRPC section of fs/Kconfig, however select is
> evil...

select itself isn't evil.

Nonsensical selects like the one you suggest (sunrpc does not require
IPV6) are evil.

> Regards/Gruß,
> Boris.

cu
Adrian

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