Re: link-sets in modules

[Paul Goyette <paul%whooppee.com@localhost>]

On Tue, 29 May 2012, David Laight wrote:

> I'm not at all sure ld uses a linker script for 'ld -r' - so you can't
> add symbols that way.
> No reason why the module loader can't generate them though.
>
> But really you need the module loader be able to request the contents
> of the linkset be processed by code in the main kernel (eg to get
> sysctls or event counters added).

Well, at least for sysctl's SYSCTL_SETUP() stuff, you probably don't 
want to use the same initialization call for modules as is used for 
built-ins.  The built-ins are initialized with an explicit NULL argument 
passed for the sysctl_clog argument, which makes it difficult for a 
module to do its clean-up.  Modular code needs to (or at least, should?) 
pass a non-null module-specific clog so it can be used during an "undo" 
at MODULE_CMD_UNLOAD time.

JMHO ...



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