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SubjectRe: [openib-general] Re: [PATCH 0 of 18] ipath driver - for inclusion in 2.6.17
On Fri, 2006-03-24 at 13:19 -0800, Roland Dreier wrote:

> Having #ifdef CONFIG_NET all over is definitely suboptimal.
> Unfortunately it looks kind of hard to untangle your skb use from the
> rest of the driver, so putting a dependency on NET might be the best bet.

I don't think it will be that bad, actually. I'll see how it works to
just move skb-based code into a single source file and build it iff

> How are you building on powerpc?

I have a hack that lets me compile-test, which I used to make sure I was
getting sparse annotations and header inclusions into decent shape.

> Anyway building an ia64 cross toolchain is easy with

I'll take a look.

> I would just get rid of your atomic_clear_mask() and atomic_set_mask()
> calls. They're bogus because you're not even operating on an
> atomic_t, and not many architectures implement them.

They're not obviously defined to operate on atomic_t objects, but what
you say makes sense. I guess that's a peril of using macros for that

> Bryan> I've been building with C=1 for months. I'll see if I can
> Bryan> figure out why you're getting such different results.
> It's probably because I use CF=-D__CHECK_ENDIAN__ too.


> The whole duplicated SMA / ipath_verbs doesn't work without ib_mad loaded.

There is no duplicated SMA code. There are two routines in ipathfs that
handle nodeinfo and portinfo structures, but they're for passing them to
userspace; they don't even really resemble the code in ipath_mad.c.

Regarding "ipath_verbs doesn't work without ib_mad loaded", I don't know
that there's a problem there any more. We took out the use of
ib_register_mad_agent to create an automatic dependency that depmod
would find, and we're just recommending mangling modprobe.conf instead
for now.

> - Andrew raised some questions about the special "pick a device for
> me" that I'm not sure we satisfied him on.

That's possible. Andrew, what's your opinion on that?

> It looks like ipath_copy.c is completely unused now that you're not
> including the ipath_ether driver.

That's true; sorry about that. Do you want me to send you a patch that
drops it and pulls it out of headers and kbuild stuff?


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