Allow to call clock_gettime() on the clock id for zombie process.

Reported by:	Petr Salinger <Petr.Salinger@seznam.cz>
PR:	threads/180496
Sponsored by:	The FreeBSD Foundation
There is no need to count waiters for the runningbufspace.

Sponsored by:	The FreeBSD Foundation
Assert that runningbufspace does not underflow.

Sponsored by:	The FreeBSD Foundation
Create a proper stack frame for i386 version of bcopy(), despite the
function is leaf.  The frame allows ddb to not loose the direct caller
of bcopy() in backtrace.

Other functions from support.s would benefit from the same change as
well, but for now bcopy() is the most frequent offender.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
When fiddling with options of which registers to copy out for
a mailbox command and which registers to copy back in when
the command completes, the bits being set need to not only
specify what bits you want to add from the default from the
table but also what bits you want *subtract* (mask) from the
default from the table.

A failing ISP2200 command pointed this out.

Much appreciation to: marius, who persisted and narrowed down what
the failure delta was, and shamed me into actually fixing it.
MFC after:	1 week
Add creation timestamp (birthtime) support for fuse.

I was keeping this #ifdef'd for reference with the MacFUSE change[1]
but on second thought, this is a FreeBSD-only header so the SVN
history should be enough.

Add missing padding while here.

Reference [1]:
http://code.google.com/p/macfuse/source/detail?spec=svn1686&r=1360
Allow regular off-the-shelf keyboards to be overclocked like so-called
"Gamers Keyboards" by adding a tunable, "hw.usb.ukbd.pollrate", which
can fix the polling rate of the attached USB keyboards in the range
1..1000Hz. A similar feature already exists in the USB mouse
driver. Use with care! Might leave you without keyboard input. This
feature is only available when the USB_DEBUG option is set in the
kernel configuration file.

Correct "unit" type to "int" while at it.
Re-implement $probe_only aspect of f_media_get_TYPE() (where TYPE is cdrom,
nfs, ftp, http, httpproxy, etc.) and f_device_get() (abstract method for
calling aforementioned f_media_get_TYPE()).

Previously, if $probe_only was present and non-NULL, the TYPE functions
would check for $file and exit with an appropriate error status (success if
the file exists and readable, failure otherwise).

While this has been retained, a pair of globals has been introduced:
$PROBE_EXIST and $PROBE_SIZE (see `/usr/share/bsdconfig/media/common.subr')

The $PROBE_EXIST global can be used where you need the functionality of
simply testing for existence (previously the _only_ functionality).

Meanwhile, the new $PROBE_SIZE global can be used to cause the TYPE function
to print the size of the file (in bytes) on standard-out (or -1) if not
found or an error occurs. NOTE: If an error occurs, it is logged with the
dprintf function, which is visible with `-d' flag or debug=1.

In many cases, where you need to get the size of a file _and_ check for its
existence, you can use the return status of a $PROBE_SIZE call.
Add some missing LIBUSB IOCTL conversion codes.
Add some missing definitions to build a working FreeBSD's libusb under Linux.
Revert r252725 as it breaks WPA.

We need to fix wpa_supplicant because it checks whether the card has
ic_cryptocaps set. Since net80211 can do software encryption this check in
wpa_supplicant is wrong.
Update to comments describing block allocation policy.

Submitted by: Bruce Evans
Fix a grammatical error.
Update fuse_kernel header.

Bring in the changes from the FUSE kernel interface 7.10
(available under a BSD license).

After 7.10 the linux FUSE developers added support for a
controversial CUSE driver and some linux especific
features that are unlikely to find its way into FreeBSD.

We currently don't implement any of the new features so we
are *not* bumping the FUSE_KERNEL_MINOR_VERSION. The header
should, nevertheless, serve  as a template to add the new
features in a compatible manner.

While here adopt some minor cleanups from the upstream version
like removing FUSE_MAJOR and FUSE_MINOR which were never
used. Also add multiple inclusion header guards,
PR: 168520 170096
Submitted by: adrian, zec

Fix multiple kernel panics when VIMAGE is enabled in the kernel.
These fixes are based on patches submitted by Adrian Chadd and Marko Zec.

(1)  Set curthread->td_vnet to vnet0 in device_probe_and_attach() just before calling
     device_attach().  This fixes multiple VIMAGE related kernel panics
     when trying to attach Bluetooth or USB Ethernet devices because
     curthread->td_vnet is NULL.

(2)  Set curthread->td_vnet in if_detach().  This fixes kernel panics when detaching networking
     interfaces, especially USB Ethernet devices.

(3)  Use VNET_DOMAIN_SET() in ng_btsocket.c

(4)  In ng_unref_node() set curthread->td_vnet.  This fixes kernel panics
     when detaching Netgraph nodes.
PR: kern/168520

Revert GRN 253255.  It is not needed now that GRN 253346 is committed.
Document options for .eli devices.

Submitted by:	ADAM David Alan Martin
Fix compiler warnings.
Introduce new structure sfstat for collecting sendfile's statistics
and remove corresponding fields from struct mbstat. Use PCPU counters
and SFSTAT_INC() macro for update these statistics.

Discussed with:	glebius
MFi386: add ddb "show sysregs" command.

Sponsored by:	The FreeBSD Foundation
MFC after:	1 week