Add a comment giving an overview of the driver.  Remove leftover debugging.
sh: Make checkend() a real function instead of an emulated nested function.

No functional change is intended, but the generated code is slightly
different.
sh: Remove arbitrary length limit on << EOF markers.

This also simplifies the code.
Fix an undefined variable that was accidentally not causing an error.

The code had references to both intr_offset and intr_parent variable names
as referring to the parent interrupt node.  The intr_parent variable
wasn't actually defined anywhere, but the only references to it were as
an argument to a macro that didn't use that argument in expansion, so
the undefined variable accidentally didn't cause an error.

The intr_parent name makes more sense in context, so change all occurrances
of intr_offset to intr_parent.
Add compat strings for all the flavors of GIC this driver should support.
Also allow the driver to attach to ofwbus as well as simplebus, some FDT
data puts the root interrupt controller on the root bus.
Avoid an exclusive acquisition of the object lock on the expected execution
path through the NFS clients' getpages functions.

Introduce vm_pager_free_nonreq().  This function can be used to eliminate
code that is duplicated in many getpages functions.  Also, in contrast to
the code that currently appears in those getpages functions,
vm_pager_free_nonreq() avoids acquiring an exclusive object lock in one
case.

Reviewed by:	kib
MFC after:	6 weeks
Sponsored by:	EMC / Isilon Storage Division
Pull in r217410 from upstream llvm trunk (by Bob Wilson):

  Set trunc store action to Expand for all X86 targets.

  When compiling without SSE2, isTruncStoreLegal(F64, F32) would return
  Legal, whereas with SSE2 it would return Expand. And since the Target
  doesn't seem to actually handle a truncstore for double -> float, it
  would just output a store of a full double in the space for a float
  hence overwriting other bits on the stack.

  Patch by Luqman Aden!

This should fix clang -O0 on i386 assigning garbage to floats, in
certain scenarios.

PR:		187437
Submitted by:	cebd@gmail.com
Obtained from:	http://llvm.org/viewvc/llvm-project?rev=217410&view=rev
MFC after:	3 days
Add a common routine for parsing FDT data describing an ARM GIC interrupt.

In the fdt data we've written for ourselves, the interrupt properties
for GIC interrupts have just been a bare interrupt number.  In standard
data that conforms to the published bindings, GIC interrupt properties
contain 3-tuples that describe the interrupt as shared vs private, the
interrupt number within the shared/private address space, and configuration
info such as level vs edge triggered.

The new gic_decode_fdt() function parses both types of data, based on the
#interrupt-cells property.  Previously, each platform implemented a decode
routine and put a pointer to it into fdt_pic_table.  Now they can just
list this function in their table instead if they use arm/gic.c.
Merge remote-tracking branch 'freebsd/master' into hardened/current/segvguard