Re: Persistent module storage [was Linux 2.4 Status / TODO page]

[Alan Cox]

> 1. Before auto-unload of the driver, run a small utility which will read
> mixer settings
>    and save them somewhere
> 2. When auto-loading the driver, use driver arguments which are initialized
> from the
>    settings saved above
> All that's missing is the method of passing data from step 1 to step 2.

A simple more generic solution is to do this


struct things_to_keep my_bits
{
        ..
};

struct things_to_keep __persistent card_info[NUM_CARDS]
{
}

and have insmod do

        load module up
        open /var/run/moduledata/$modname
        if exists && is from this boot then && is right size
                read data into __persistent ELF section
        endif
        load into kernel
        init module

and rmmod
        cleanup module
        open /var/run/moduledata/$modname
        write data from __persistent segment into file
        
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