Don't do synchronous USB requests inside USB transfer callbacks. It is
technically OK, but not recommended.

MFC after:	1 weeks
Make sure reserved fields of the EHCI DMA descriptors are not dirty
after previous transfers.

MFC after:	1 week
Fix gcc with EABI on big-endian ARM by setting the endian correctly.
Without this gcc would generate byte loads for a little-endian core.

MFC after:	1 week
Remove incorrect bit shift when assigning the LUN request field

This caused duplicate targets appearing on Google Compute Engine
instances.

PR:		kern/185626
Submitted by:	Venkatesh Srinivas <venkateshs@google.com>
MFC after:	3 days
Correctly update the count of stuck pages, "addl_page_shortage", in
vm_pageout_scan().  There were missing increments in two less common cases.

Don't conflate the count of stuck pages and the pageout deficit provided by
vm_page_alloc{,_contig}().  (A proposed fix to the OOM code depends on this.)

Handle held pages consistently in the inactive queue scan.  In the more
common case, we did not move the page to the tail of the queue.  Whereas, in
the less common case, we did.  There's no particular reason to move the page
in the less common case, so remove it.

Perform the calculation of the page shortage for the active queue scan a
little earlier, before the active queue lock is acquired.  The correctness
of this calculation doesn't depend on the active queue lock being held.

Eliminate a redundant variable, "pcount".  Use the more descriptive
variable, "maxscan", in its place.

Apply a few nearby style fixes, e.g., eliminate stray whitespace and excess
parentheses.

Reviewed by:	kib
Sponsored by:	EMC / Isilon Storage Division
fts: Stat things relative to the directory fd, if possible.

As a result, the kernel needs to process shorter pathnames if fts is not
changing directories (if fts follows symlinks (-L option to utilities), fts
cannot open "." or FTS_NOCHDIR was specified).

Side effect: If pathnames exceed PATH_MAX, [ENAMETOOLONG] is not hit at the
stat stage but later (opendir or application fts_accpath) or not at all.
fts(3): Remove stray mentions of the obsolete fts_bignum.
Generate and install pkg-config files for atf.

These files are required to get packages in ports to build against atf and
also to get a couple of currently-failing tests to pass.

I'm following the approach already used by the libusb pkg-config files
installed by the system regarding the location and the install rules.

MFC after:	5 days
Add atf pkg-config files from the vendor branch.

These were originally deleted by mistake (because they were not yet being
installed) and are actually necessary.

This should have been part of r260576 but I missed committing this
directory.

MFC after:	5 days
Add sglist_append_bio(9) to append a struct bio's data to a sglist

Reviewed by:	jhb, kib (long ago)
Add unmapped IO support to virtio_blk(4)
Add unmapped IO support to virtio_scsi(4)
[automated] Merge in upstream-github/master