[openib-general] ip_ib_mc_map?

[Michael S. Tsirkin]

> Quoting Steve WIse <swise at opengridcomputing.com>:
> Subject: Re: ip_ib_mc_map?
> 
> On Wed, 2007-01-31 at 17:53 -0800, Sean Hefty wrote:
> > Steve Wise wrote:
> > > Perhaps there's no backport for this to rhel4u4?
> > 
> > I would have thought so, but I really don't know.  The function is called from 
> > net/ipv4/arp.c, and not directly by ipoib.  So, I don't know how the backport 
> > patches typically handle this.
> > 
> > - Sean
> 
> Here's what I see:
> 
> ip_ib_mc_map() is called directly from cma_join_ib_multicast(), which is
> added to the ofed_1_2 cma.c via patch file:
> kernel_patches/fixes/sean_multicast_1.patch
> 
> So when I compiled ofed_1_2 on rhel4u4, the cma wouldn't load because
> there is no ip_ib_mc_map() in rhel4u4.  
> 
> So you need a backport patch for this to work on rhel4u4.  Probably many
> of the older kernels.

I think this breakage is U4 specific. Someone at RH went to the trouble to
rip all of IB related stuff out of the U4 kernel.

I think just calling ip_tr_mc_map on U4 instead will be enough.

-- 
MST