Where are bus passes with lower than default pass value called?

Jan Mazur <[email protected]> Mon, 28 May 2018 12:16:39 +0200

Newsgroups	gmane.os.freebsd.devel.new-bus
Message-ID	<CADGEm4fs0P7yBgUqcqdBvNNOo2Y0=QP1QwOrvbLgfzhmJzrdrw@mail.gmail.com>

Here: http://bxr.su/FreeBSD/sys/kern/subr_bus.c#901
bus_current_pass is set to BUS_PASS_ROOT.

AFAIK autoconfiguration starts here:
http://bxr.su/FreeBSD/sys/mips/mips/autoconf.c#95 and later it
calls BUS_NEW_PASS(root_bus) which calls bus_set_pass(BUS_PASS_DEFAULT).
Why is it called with maximum possible bus pass level - BUS_PASS_DEFAULT?
Where are bus passes with lower pass value called?

JM
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