into the FreeBSD boot loader, typically for non-USB aware BIOSes, EFI systems
or embedded platforms. This is also useful for out of the system compilation
of the FreeBSD USB stack for various purposes. The USB kernel files can
now optionally include a global header file which should include all needed
definitions required to compile the FreeBSD USB stack. When the global USB
header file is included, no other USB header files will be included by
default.

Add new file containing the USB stack configuration for the
FreeBSD loader build.

Replace some __FBSDID()'s by /* $FreeBSD$ */ comments. Now all
USB files follow the same style.

Use cases:
 - console in loader via USB
 - loading kernel via USB

Discussed with:		Hiroki Sato, hrs @ EuroBSDCon

their socket connection any time, and devd only notices that when it gets an
error trying to write an event to the client.  On a system with no device
change activity, clients could connect and disappear repeatedly without devd
noticing, leading to an ever-growing list of open socket descriptors in devd.

Now devd uses poll(2) looking for POLLHUP on all existing clients every time
a new client connection is established, and also periodically (once a minute)
to proactively find zombie clients and reap the socket descriptors.  It also
now has a connection limit, configurable with a new -l <num> command line arg.
When the maximum number of connections is reached it stops accepting new
connections until some current clients drop off.

Reviewed by:	imp
Approved by:	cognet (mentor)

with the respective regression test.
See http://pubs.opengroup.org/onlinepubs/9699919799/functions/fmemopen.html

Reviewed by:	cognet
Approved by:	cognet

trivial handler for SIGCHLD is installed, and SIGCHLD is blocked, to
not abandon our zombies to init(8). This way, the zombies are around
slightly longer, allowing to actually exercise the logic for p_pwait
use by the test.

MFC after:	1 week

in kern_wait6(), which is called by kern_wait().  Remove the redundand
check, introduced in r243136, and add a comment noting this, to make
the code less confusing.

The blank lines are added to properly delineate the scope of the
preceeding comments.

Noted by:	"Jukka A. Ukkonen" <jau@iki.fi>
MFC after:	1 week

but use normal references instead of weak.  This makes the statically
linked binaries to use fast gettimeofday(2) by forcing the linker to
resolve references and providing the neccessary functions.

Reported by:	bde
Tested by:	marius (sparc64)
MFC after:	2 weeks

timecounter to 1, and correspondingly increase the precision of the
gettimeofday(2) and related functions in the default configuration.

The motivation for the TSC-low timecounter, as described in the
r222866, seems to provide a workaround for the non-serializing
behaviour of the RDTSC on some Intel hardware.  Tests demonstrate that
even with the pre-shift of 8, the cross-core non-monotonicity of the
RDTSC is still observed reliably, e.g. on the Nehalems.  The r238755
and r238973 implemented the proper fix for the issue.

The pre-shift of 1 is applied to keep TSC not overflowing for the
frequency of hardclock down to 2 sec/intr.  The pre-shift is made a
tunable to allow the easy debugging of the issues users could see with
the shift being too low.

Reviewed by:	bde
MFC after:	2 weeks

Submitted by:	jkim

Reported by:	Lars Engels
MFC after:	1 week

the default.

The current behavior of advertising a single MSI vector can be requested by
setting the environment variable "BHYVE_USE_MSI" to "true". The use of MSI
is not compliant with the virtio specification and will be eventually phased
out.

Submitted by:	Gopakumar T
Obtained from:	NetApp

This instruction moves a byte from a register to a memory location.

Tested by: tycho nightingale at pluribusnetworks com

debug is set very high (like -d15 in my case).

Obtained from:	Yahoo! Inc
MFC after:      2 weeks

Make cat a bootstrap tool to facilitate this.

ITOOLS when we will be using the host copy.

Fix installkernel when -DNO_ROOT is set.

points to a sockaddr of AF_LINK family. Assert this instead of
checking.

txq's buf_ring.  The aggregate for all the queues of a port is already
provided in ifnet->if_snd.ifq_drops.

MFC after:	3 days.

Reported by:	lev, jmg

 - Remove $DragonFly$ tags as they are using git nowadays and VCS tags will
   not help merging.
 - Other changes to Copyright headers to make them consistent with other
   source code, we intend to fork from this point.

Reviewed by:	pfg

by moving bits that are MI out into headers in compat/linux.

Reviewed by:	Chagin Dmitry  dmitry | gmail
MFC after:	2 weeks

set an exclusive advisory lock on stdout.  This will be used to guarantee
orderly writing to METALOG.

Sponsored by:	DARPA, AFRL
Obtained from:	NetBSD (mason)

  DragonflyBSD and install it as bsdpatch.  WITH_BSD_PATCH makes it
  default and installs GNU patch as gnupatch.

Submitted by:	pfg
Obtained from:	The DragonflyBSD Project

Update dts and kernel config

Approved by: gonzo@

Noticed by:	avg

Reported by:	pjd

subtle way:

https://github.com/otcshare/acpica/commit/b8cf8cd2232f4e08ef9f8df4a103a29bd8699194

compiler from caching their values in tight loops.

Reviewed by:	bde
MFC after:	1 week

  array of loaded objects to avoid a buffer overrun.
- Use reallocf() to avoid leaking memory if the realloc() fails.

PR:		kern/175648
Submitted by:	yuri@rawbw.com (1)
MFC after:	1 week

Reviewed by:	alc
MFC after:	2 weeks

Reviewed by:	alc
MFC after:	2 weeks

Reviewed by:	alc
MFC after:	2 weeks

MFC after:	2 weeks

MFC after:	2 weeks