K 10
svn:author
V 3
erj
K 8
svn:date
V 27
2019-09-09T18:07:31.751278Z
K 7
svn:log
V 828
iflib: initialize the STATE_LOCK in iflib_register

From Jake:
r347197 contained an MFC for r332389, adding the STATE_LOCK to the iflib
core driver. Unfortunately, the commit accidentally missed adding the
STATE_LOCK_INIT.

Without this, if you build a STABLE-11 kernel with INVARIANTS enabled,
any mtx_lock of the state lock will result in a panic:

panic: mtx_lock() of spin mutex (null) @ /usr/src/sys/net/iflib.c:5522

It actually ends up looking like a panic due to taking a spin mutex when
we could be interrupted. However, the real cause is because the lock
class was never initialized.

Initialize the STATE_LOCK properly during iflib_register to fix this.

Submitted by:	Jacob Keller <jacob.e.keller@intel.com>
Reviewed by:	erj@
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D21540

END