module: set nx before marking module MODULE_STATE_COMING.

module: set nx before marking module MODULE_STATE_COMING.

commit 4982223e51e8ea9d09bb33c8323b5ec1877b2b51 upstream.

We currently set RO & NX on modules very late: after we move them from
MODULE_STATE_UNFORMED to MODULE_STATE_COMING, and after we call
parse_args() (which can exec code in the module).

Much better is to do it in complete_formation() and then call
the notifier.

This means that the notifiers will be called on a module which
is already RO & NX, so that may cause problems (ftrace already
changed so they're unaffected).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>