Remove redundant ip6_plen initialization.

MFC after:	1 week
Sponsored by:	Yandex LLC
Strip IP header only when we act in tunnel mode.

MFC after:	1 week
Sponsored by:	Yandex LLC
Count statistics for the specific address family.

MFC after:	1 week
Sponsored by:	Yandex LLC
Bump FreeBSD_version for r274462 - add ppoll() system call.
Remove fossil.  It has been present in 4.4Lite2, but its use was
removed for some time.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Do not try to dereference thread pointer when the value is not a pointer.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Regen test cases for yacc(1) after r274460.  YYINT is int now.

PR:		194982
Remove the no-at variants of the kern_xx() syscall helpers.  E.g., we
have both kern_open() and kern_openat(); change the callers to use
kern_openat().

This removes one (sometimes two) levels of indirection and
consolidates arguments checks.

Reviewed by:	mckusick
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Fix check for vendor-specific peripheral qualifier.

Submitted by:	anton.rang@isilon.com
MFC after:	1 week
Fix assertion, &uc->uc_busy is never zero, the intent is to test the
uc_busy value, and not its address [1].

Remove the single use of the macro, write KASSERT() explicitely in the
code of umtxq_sleep_pi().

Submitted by:	Eric van Gyzen <eric@vangyzen.net> [1]
MFC after:	1 week
Remove reference to sys/dev/dpt/dpt_control.c.  It was removed back in 2001 after having
never been updated for CAM changes in 1998.
Remove dpt_isa.c and commented out references to it.  It was never connected
to the build in either sys/conf/files* or sys/modules/dpt/Makefile.  Also,
it was denoted as "doesn't quite work yet" when the file was initially added
(which may account for it never having been hooked up to the build).
Drop mention of ISA cards.  Note that I have no idea what to cull from the
supported hardware list.  Judging by the PCI driver attachment, dpt_pci.c
only supports a single adapter rather than the various PCI adapters listed.
The list of EISA adapters listed somewhat overlaps with the device IDs in
dpt_eisa.c.  It's not clear which devices are ISA-only devices.
filedesc: fixup fdinit to lock fdp and preapare files conditinally

Not all consumers providing fdp to copy from want files.

Perhaps these functions should be reorganized to better express the outcome.

This fixes up panics after r273895 .

Reported by:	markj
﻿The fix imported into llvm in r274442 contains some C++11 constructs,
which gcc in base cannot handle.  Replace these with C++98 equivalents.

While here, add the patch for the adapted fix.

Reported by:	bz, kib
Pointy hat to:	dim
MFC after:	1 week
X-MFC-With:	r274442
Fix typo in ARM GIC device_printf()

Obtained from:   Semihalf
Sponsored by:    The FreeBSD Foundation
filedesc: oops.. commit missing change to filedesc.h
Lock iir(4) and mark it MPSAFE.
- Add a per-device mutex to the softc and use it for bus_dma tags,
  CAM SIMs, callouts, and interrupt handler.
- Switch from timeout(9) to callout(9).
- Add a separate global mutex to protect the global event buffer ring.
- Return completed index from iir_intr_locked() and remove the global
  gdt_wait_* variables.
- Remove global list of gdt softcs and replace its use with
  devclass_get_device().
- Use si_drv1 to store softc pointer in the SDEV_PER_HBA case instead
  of minor numbers.
- Do math on osreldate instead of dubious char math on osrelease[]
  that didn't work on 10.0+.
- Use bus_*() instead of bus_space_*().
- Use device_printf() instead of printf() with a unit number.

Tested by:	no one
- Use the existing driver lock in cdevsw methods and remove D_NEEDGIANT.
- Use callout(9) instead of timeout(9).
- Use bus_*() instead of bus_space_*().
- Don't check for a NULL softc in attach.

Tested by:	no one
Extend earlier addition of stack frames to most of support.S.  This makes
stack traces in KDB, HWPMC, and DTrace much more reliable and useful.

Reviewed by:	kan, kib
Obtained from:	Netflix, Inc.
MFC after:	5 days