Resolving missing external symbols at module load time.

Resolving missing external symbols at module load time.

[Jon Smirl]

I'm looking at how to get rid of the inter_module_get calls in DRM to
AGP. What is the proper procedure to reference an external symbol that
may be any of the following:

1) compiled in
2) module that is loaded
3) non-existent since the system doesn't have the hardware

With inter_module_get() #1 and #2 would succeed and return a pointer
to the module. #3 would fail. The DRM code then handled each of these
cases. I've been looking at the new module calls and and I can't see
how to make this work.

The symbol resolution also needs to work if DRM is compiled in and the
system has no AGP support.

-- 
Jon Smirl
jonsmirl@gmail.com

Re: Resolving missing external symbols at module load time.

[Jon Smirl]

On Fri, 22 Oct 2004 16:47:44 -0400, Jon Smirl <jonsmirl@gmail.com> wrote:
> I'm looking at how to get rid of the inter_module_get calls in DRM to
> AGP. What is the proper procedure to reference an external symbol that
> may be any of the following:
> 
> 1) compiled in
> 2) module that is loaded
> 3) non-existent since the system doesn't have the hardware
> 
> With inter_module_get() #1 and #2 would succeed and return a pointer
> to the module. #3 would fail. The DRM code then handled each of these
> cases. I've been looking at the new module calls and and I can't see
> how to make this work.
> 
> The symbol resolution also needs to work if DRM is compiled in and the
> system has no AGP support.

I've found some old posts in the lkml archives and now I see this is
what symbol_get()/symbol_put() are for.

-- 
Jon Smirl
jonsmirl@gmail.com