Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r227293 (by ed):
Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs.

This means that their use is restricted to a single C file.

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Get myself a brain, move the call to init_param1() before the first use in
at91_machdep.c, and do it for the files I forgot the first time

Reported by: andrew
Submitted by: pluknet

Make MSGBUF_SIZE kernel option a loader tunable kern.msgbufsize.

Submitted by: perryh pluto.rain.com (previous version)
Reviewed by: jhb
Approved by: kib (mentor)
Tested by: universe

Implement a facility for dynamic per-cpu variables.
- Modules and kernel code alike may use DPCPU_DEFINE(),
DPCPU_GET(), DPCPU_SET(), etc. akin to the statically defined
PCPU_*. Requires only one extra instruction more than PCPU_* and is
virtually the same as __thread for builtin and much faster for shared
objects. DPCPU variables can be initialized when defined.
- Modules are supported by relocating the module's per-cpu linker set
over space reserved in the kernel. Modules may fail to load if there
is insufficient space available.
- Track space available for modules with a one-off extent allocator.
Free may block for memory to allocate space for an extent.

Reviewed by: jhb, rwatson, kan, sam, grehan, marius, marcel, stas

Pass the previously returned IRQ back to arm_get_next_irq() so that
the implementation can guarantee forward progress in the event of
a stuck interrupt or interrupt storm. This is especially critical
for fast interrupt handlers, as they can cause a hard hang in that
case. When first called, arm_get_next_irq() is passed -1.

Obtained from: Juniper Networks, Inc.

- Fix spelling error in comments.

PR: arm/128891
Submitted by: Pavel Pankov <pankov_p@mail.ru>
Approved by: kib (mentor)

Eliminate unused global variables. (These global variables became fields of
struct kva_md_info many years ago.)

Add the pxa_teardown_intr() bus method function to de-associate the
interrupt handler

Pull all the code to deal with bus space methods into a shared set of
routines.

Unify arminit() and clean up

Support for the XScale PXA255 SoC as found on the Gumstix Basix and Connex
boards. This is enough to net-boot to multiuser.

Also supported is the SMSC LAN91C111 parts used on the netCF, netDUO and netMMC
add-on boards.

I'll be putting some instructions on how to boot this on the Gumstix boards
online soon.

This is still fairly rough and will be refined over time but I felt it was
better to get this out there where other people can help out.