From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mike Snitzer <snitzer@redhat.com>
Subject: Re: if i create a new dm target type,
 do i need to add its init to the _inits[] and its exit to the
 _exits[]?
Date: Wed, 7 May 2014 09:09:47 -0400
Message-ID: <20140507130946.GA29851@redhat.com>
References: <8A51900D08212F40B3DE22453052F6981D0F0297@wdscexmb02>
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To: John Utz <John.Utz@wdc.com>
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On Wed, May 07 2014 at 12:45am -0400,
John Utz <John.Utz@wdc.com> wrote:

> Hello;
> 
> While looking thru dm.c trying to figure out how to add new target
> specific errors and sense codes I came across the following arrays:
> 
> static int (*_inits[])(void) __initdata = {
>         local_init,
>         dm_target_init,
>         dm_linear_init,
>         dm_stripe_init,
>         dm_io_init,
>         dm_kcopyd_init,
>         dm_interface_init,
>         dm_statistics_init,
> };
> 
> static void (*_exits[])(void) = {
>         local_exit,
>         dm_target_exit,
>         dm_linear_exit,
>         dm_stripe_exit,
>         dm_io_exit,
>         dm_kcopyd_exit,
>         dm_interface_exit,
>         dm_statistics_exit,
> };
> 
> 
> What are the rules for what goes in to these? I don't see every dm-*
> target listed in these and i am curious as to what are the differences
> between what goes into these arrays and what does not.

These are only for the targets and services provided by the DM core
(dm-mod.ko went built as a module).