kernel/linprocfs: Remove useless .PATH in the Makefile.
kernel/linprocfs: Add a missing header for spin_{,un}lock().
kernel - Stop KTR logging during panic

* Stop all KTR logging when a panic occurs so the KTR buffer doesn't
  get wiped out by events during the panic & core dump.  This gives
  us a KTR buf snapshot as of the panic entry.
kernel - Fix long-standing vm_map token panic

* Bug turned out to be an error path in vm_map_find().

* This bug ate a lot of hours from several people, but Antonio was able
  to instrument the token path in a way that allowed us to narrow down
  and locate the problem.

Submitted-by: tuxillo, vsrinivas
Debugging-by: tuxillo
kernel - Fix incorrect dirty/reprotect code in pageout

* vm_object_page_collect_flush() was trying to re-protect VM pages that
  were still marked dirty after pageout I/O was initiated without owning
  the BUSY bit on the page.  This operation could race whatever I/O was
  going on and multiple issues.  Remove the re-protect.

  Just don't do it.  It's an unnecessary operation.  We still re-set
  PG_CLEANCHK on the page and that should be fine insofar as the pageout
  daemon goes.

* Note that the pageout_flush code protects the VM pages properly (to
  read-only) prior to initiating I/O .

* Should fix bug #2350

* Might be related to the wire-count bug considering that we were messing
  with the page's pmap without owning the BUSY bit.  Small chance.
Merge branch 'master' into gsocdrm_alter
kernel - Change lockmgr LK_SHARED behavior to fix improper recursion return

* When obtaining a LK_SHARED lock in a situation where you already own the
  lock LK_EXCLUSIVE, lockmgr would downgrade the lock to shared.

  This creates a very serious problem when large procedural recursions get
  a lock that is already being held exclusively but request a shared lock.
  When these recursions return the original top level will find its lock is
  no longer exclusive.

* This problem occured with vnode locks when a VOP_WRITE operation on a mmap'd
  space causes a VM fault which then turns around and issues a read().
  When the fault returns the vnode wound up locked shared instead of
  exclusive.

* Fix the problem by NOT downgrading an exclusive lock to shared when
  recursing on LK_SHARED.  Simply add another count to the exclusive
  lock.
kernel - Adjust UFS and HAMMER to use uiomovebp()

* Add uiomovebp(), a version of uiomove() which is aware of a locked bp
  representing the to or from buffer and can work-around issues related
  to VM faults causing recursions and deadlocks on the user buffer.

  uiomovebp() does not yet detect or handle deadlocks.  Implementing
  deadlock handling will require a certain degree of finess related to
  the vnode and bp locks and we don't want to have to do it unless we
  actually deadlock.  TODO.

* Adjust UFS, HAMMER, TMPFS, MSDOSFS, NFS, NTFS to use uiomovebp().
ixgbe: remove unneeded lockuninit call
newfs_hammer.8: Mdoc fix
pci: Disable memory address decoding before writing 0xffffffff to BAR

This makes PCIe memory mapped configuration works.

Submitted-by: Romick Romick
Tested-by: y0netan1@
pci: Enable PCIe memory mapped configuration again

bd7ad9e91e71693907a00c74ab8dfc457cd655c9 should have fixed the
system hanging seen by y0netan1@
puffs - Comment out namecache purge for now

* Comment out a namecache purge that deadlocks for now.
kernel - Fix condvar races

* Interlocked sleep was not using the PINTERLOCKED flag.

* Misc other adjustments.
Merge branch 'master' into gsocdrm_merger