TSO engine of L1 requires a separate DMA descriptor for TCP
payload.  This means driver has to split a TX buffer into two
pieces of TX buffers when the TX buffer contains both
ethernet/IP/TCP header and partial TCP payload.  The controller
does not require all header should be in a TX buffer but driver
forced it to compute IP/TCP header size/offset which is required
parameter to configure DMA descriptor for TSO.
While here, slightly reorder DMA descriptor setup to enhance
readability and remove unnecessary code for TSO(upper stack never
requests TSO when the frame length is less than or equal to MTU).

Reported by:	Yamagi Burmeister <lists <> yamagi dot org>
Tested by:	Yamagi Burmeister <lists <> yamagi dot org>
MFC After:	1 week
Teach pw(8) about how to use pw/gr API to reduce code duplication

MFC after:	2 months
The argument len of m_pullup(9) could be less than or equal to MHLEN.

Reviewed by:	glebius
Print card and subsystem IDs in verbose logs to help to identify system.
Hide some less iseful messages under debug.
tdq_lock_pair() already does spinlock_enter() so migration is not
possible in sched_balance_pair(). Remove redundant sched_pin().

Reviewed by:	marius, jeff
Set all pins initial connection status to unknown (2) and then update it
with the real value in regular way if sensing is supported.  This fixes
minor inconsistency when playback redirection appeared in undefined state
on boot if headphones were not connected.
Use M_ZERO instead of explicit memsets and bzeros.
Document disk_resize(9).
- Remove BCE_JUMBO_HDRSPLIT kernel option which was forgotten in r218423.

Approved by:	davidch
Approved by:	kib (mentor)
Fixup r240246: hwpmc needs to retain the pinning until ASTs are not
executed. This means past the point where userret() is generally
executed.

Skip the td_pinned check if a callchain tracing is currently happening
and add a more robust check to pmc_capture_user_callchain() in order to
catch td_pinned leak past ast() in hwpmc case.

Reported and tested by:	fabient
MFC after:	1 week
X-MFC:	r240246
Fix SMP build for omap4

Submitted by:	Giovanni Trematerra <gianni at freebsd DOT org>
If a USB mass storage device doesn't respond properly
to the initial SCSI INQUIRY command, enable all quirks.
This fixes detection of some Transcend TS2GUFM devices.

MFC after:	1 week
Reported by:	Michael Dexter
atrun(8): scale default load average limit with the number of CPUs

Previously atrun refused to run jobs if load average was not below fixed limit of 1.5.

PR:		173175
Reviewed by:	peterj
Approved by:	trasz (mentor)
MFC after:	2 weeks
Catch up with r238925.  ktr_entries may not be a power of 2.
Fix problem with geom_label(4) not recognizing UFS labels on filesystems
extended using growfs(8).  The problem here is that geom_label checks if
the filesystem size recorded in UFS superblock is equal to the provider
(i.e. device) size.  This check cannot be removed due to backward
compatibility.  On the other hand, in most cases growfs(8) cannot set
fs_size in the superblock to match the provider size, because, differently
from newfs(8), it cannot recompute cylinder group sizes.

To fix this problem, add another superblock field, fs_providersize, used
only for this purpose.  The geom_label(4) will attach if either fs_size
(filesystem created with newfs(8)) or fs_providersize (filesystem expanded
using growfs(8)) matches the device size.

PR:		kern/165962
Reviewed by:	mckusick
Sponsored by:	FreeBSD Foundation
Pull in r165377 from upstream llvm trunk:

  X86: fcmov doesn't handle all possible EFLAGS, fall back to a branch
  for the others.

  Otherwise it will try to use SSE patterns and fail horribly if sse is
  disabled.

  Fixes PR14035.

This should fix the following assertion failure:

  Assertion failed: (Reg >= X86::FP0 && Reg <= X86::FP6 && "Expected FP
  register!"), function getFPReg, file
  contrib/llvm/lib/Target/X86/X86FloatingPoint.cpp, line 330.

which can show up when compiling contrib/compiler-rt, using -march=i686
through -march=pentium3 (CPU's which do support fcmov, but don't support
SSE2).

MFC after:	1 week
Document the pw_util(3) functions

Reviewed by:	des, gjb
Removed unnecessary bits in the header that shows where I stole the template
Minor mdoc and language fixes.
Change the code to use %jd as printf() placeholder for uio_offset and
cast to intmax_t.

Suggested by:	pjd
Sponsored by:	iXsystems inc.