MFC breaks arm (at least for atmel)

[Warner Losh]

Hey Scott,

I think a merge you did broke things on arm. At least for atmel arm. I get the following panic after the following merge, but not before it.

KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2013 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 9.1-STABLE #12 r251897M: Thu Dec  5 21:54:53 MST 2013
    imp at dune.bsdimp.com:/dune/imp/obj/arm.arm/imp/svn/stable/9/sys/G20 arm
gcc version 4.2.1 20070831 patched [FreeBSD]
CPU: ARM926EJ-S rev 5 (ARM9EJ-S core)
  DC enabled IC enabled WB enabled LABT
  32KB/32B 4-way Instruction cache
  32KB/32B 4-way write-back-locking-C Data cache
real memory  = 67108864 (64 MB)
panic: kmem_suballoc: bad status return of 3
KDB: enter: panic

but I can't get a db> prompt to give you a traceback, or any kind of traceback...

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r251897 | scottl | 2013-06-17 23:21:40 -0600 (Mon, 17 Jun 2013) | 11 lines

Merge the second part of the unmapped I/O changes.  This enables the
infrastructure in the block layer and UFS filesystem as well as a few
drivers.  The list of MFC revisions is long, so I won't quote changelogs.

r248508,248510,248511,248512,248514,248515,248516,248517,248518,
248519,248520,248521,248550,248568,248789,248790,249032,250936

Submitted by:   kib
Approved by:    kib
Obtained from:  Netflix

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And ideas? Maybe a missed merge?

Warner