annotate geom modules with MODULE_VERSION

[op]

Summary

GEOM ELI may double ask the password during boot. Once at loader time, and once at init time.
This happens due a module loading bug. By default GEOM ELI caches the password in the kernel,
but without the MODULE_VERSION annotation, the kernel loads over the kernel module, even if
the GEOM ELI was compiled into the kernel. In this case, the newly loaded module purges /
invalidates / overwrites the GEOM ELI's password cache, which causes the double asking.

Obtained from: opBSD
Fixes: #285
PS.:
If you find out the patch fine, please commit them.

[kevans]

sys/geom/bde/g_bde.c

293

The module name should be the same as the second parameter to DECLARE_GEOM_CLASS above, no?

[op]

sys/geom/bde/g_bde.c

293

AFAIK the name could be a free text. First I looked into g_sched, and I followed the pattern what I found. But yes, there are others too, like in geom_flashmap.

~~~
op@opn geom> git grep 'MODULE_VERSION'
geom_flashmap.c:MODULE_VERSION(g_flashmap, 0);
part/g_part.c:MODULE_VERSION(g_part, 0);
raid/g_raid.c:MODULE_VERSION(geom_raid, 0);
sched/g_sched.c:MODULE_VERSION(geom_sched, 0);
~~~

From the user point of view, the module name is much more preferable, since it's more easy find them and looks better in error messages.