[linux-yocto] v4.12.x - stable updates comprising v4.12.23

[Paul Gortmaker]

Bruce, Yocto kernel folks:

Here is another 4.12.x stable update "extension" primarily created for
the Yocto project, continuing on top of the previous v4.12.22 kernel.

There about 150 commits here, with no real multi-commit topics, meaning
things are returning to what is normal for a stable release.  It is
just a few CVEs that I was made aware of, plus selected content
based on what was used for 4.14-stable that would also be appropriate
for the 4.12 kernel here.

As usual, I've put this 4.12.x queue through the various testing that I
figured made sense, which includes but is not limited to:

-x86-64 sanity boot test + workloads of defconfig on COTS Core2 box.
-build MIPS, PPC, ARM, ARM64 with defconfig
-build x86-64 allmodconfig/allyesconfig
-build i386 allmodconfig/allyesconfig

I bumped the 4.12 Makefile and did the signed tag just as per the previously
released 4.12.x versions.

Please find a signed v4.12.23 tag using this key:

http://pgp.mit.edu/pks/lookup?op=vindex&search=0xEBCE84042C07D1D6

in the repo in the kernel.org directory here:

   https://git.kernel.org/cgit/linux/kernel/git/paulg/linux-4.12.y.git/
   git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux-4.12.y.git

for merge to standard/base in linux-yocto-4.12 and then out from there
into the other base and BSP branches.

For those who are interested, the evolution of the commits is here:

   https://git.kernel.org/cgit/linux/kernel/git/paulg/longterm-queue-4.12.git/

This repo isn't needed for anything; it just exists for transparency and
so people can see the raw commits that were used to create this 4.12.x
release, similar to Greg's stable queue:

   https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/

Paul.
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