Re: link-sets in modules

[Jukka Ruohonen <jruohonen%iki.fi@localhost>]

On Tue, May 29, 2012 at 03:00:58PM -0700, Paul Goyette wrote:
> 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.

Indeed I consider it a bug if a module uses SYSCTL_SETUP() (and does not
tear down the nodes after unload). This applies more generally to drivers
too.

- Jukka.