Minor spelling correction.
Remove dead link
Fix typo: site_t -> size_t

Obtained From:	DragonflyBSD (1ac92c8c857a15dc010924c5f066da404e568640)
Don't enable interrupts before we call sched_throw(). Interrupts
are expected to be disabled by virtue of md_spinlock_count=1.
pkill - Optimize pgrep -F

 Ask for a specific process instead of pulling down all processes when
 -F <pidfile> is specified.  This is much much faster.

 Obtained from:	DragonflyBSD
Fix typo in r257515.

Submitted by:	az
Some CAM locks polishing:
 - Fix LOR and possible lock recursion when handling high-power commands.
Introduce new lock to protect left power quota and list of frozen devices.
 - Correct locking around xpt periph creation.
 - Remove seems never used XPT_FLAG_OPEN xpt periph flag.
Fix typo.

Submitted by:	feld@
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Save one more register read per command by not reading rqstoutrp register
every time.  The purpose of that register is unlikely output queue overflow
detection, so read it only when its last known (and probably stale now)
value signals overflow.

This reduces CPU load and lock congestion and rises bottleneck in CTL
while doing target mode via two 8Gbps ports from 100K to 120K IOPS.
Fix typo in "iscsictl -v".

MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
sh: Add a test case for would-be assignments that are not due to quoting.
Document the RB_FOREACH_FROM() and RB_FOREACH_REVERSE_FROM() macros.

These are largely syntactic sugar. However, they improve code
readability where an RB_FOREACH() or RB_FOREACH_REVERSE()
traversal has been interrupted and must be resumed. Performance
is improved by avoiding unnecessary traversal from the head node.
RB_FOREACH_[REVERSE_]FROM() do not require the head pointer. Reword.
- Add myself as port committer and my mentor's relationship.
- Add myself to calendar.freebsd.

Approved:   wg (mentor)
Apparently with "const uint32_t foo = 0x60;" gcc doesn't consider 'foo'
to be a constant integer suitable for use in a case label, so use #defines.
Prepare for 64-bit. Iow, use Elf_*hdr instead of the 32-bit ones.
sh: Properly quote alias output from command -v.

An alias should be printed by command -v as a command line; therefore, make
the alias definition suitable for re-input to the shell.
Some more registers access optimizations:
 - Process ATIO queue only if interrupt status tells so;
 - Do not update queue out pointers after each processed command, do it
only once at the end of the loop.
Use relaxed (write-only) memory barriers when writing some of queue index
registers (for now on ISP2400+).  We never read those registers back and
AFAIK their semantics does not require any immediate reaction on write.
x86 platforms that use an IOAPIC route the legacy timer interrupt (IRQ0) to
pin 2 of the IOAPIC.

Add an 'Interrupt Source Override' entry to the MADT to describe this
and start asserting interrupts on pin 2 in the 8254 device model.

Submitted by:	Tycho Nightingale (tycho.nightingale@pluribusnetworks.com)