Leandro Lupori c8e2123b6a [ppc] Fix kernel panic when using BOOTP_NFSROOT
On PowerPC (and possibly other architectures), that doesn't use
EARLY_AP_STARTUP, the config task queue may be used initialized.
This was observed while trying to mount the root fs from NFS, as
reported here: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230168.

This patch has 2 main changes:
1- Perform a basic initialization of qgroup_config, similar to
what is done in taskqgroup_adjust, but simpler.
This makes qgroup_config ready to be used during NFS root mount.

2- When EARLY_AP_STARTUP is not used, call inm_init() and
in6m_init() right before SI_SUB_ROOT_CONF, because bootp needs
to send multicast packages to request an IP.

PR:		Bug 230168
Reported by:	sbruno
Reviewed by:	jhibbits, mmacy, sbruno
Approved by:	jhibbits
Differential Revision:	D16633
2018-08-09 14:04:51 +00:00
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