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SubjectLinux 4.9-rc1
I usually do the releases on a Sunday afternoon, but occasionally cut
the merge window short by a day just to keep people on their toes, and
make sure people learn not to send in last-minute pull requests. No
gaming the merge window to the last day. This is one such release.

To be fair, the reason I did it a day early this time around is less
to stop people from trying to time their pull requests, and mostly
because this has been a pretty big merge window, and not hugely
enjoyable. I ended up stopping doing pulls twice during the merge
window just because I was chasing down some random problem. That tends
to turn my busy merge window time from "busy" to "somewhat stressful".

But hey, it's all good now, and while 4.9 looks to be a big release
and we had a couple of hiccups, on the whole things look normal. The
big new thing is the greybus addition, which Greg swears is actually
getting used. But the bulk of the changes by far is actually a lot of
small details under the hood, as usual.

My own favorite "small detail under the hood" happens to be Andy
Lutomirski's new virtually mapped kernel stack allocations. They make
it easier to find and recover from stack overflows, but the effort
also cleaned up some code, and added a kernel stack mapping cache to
avoid any performance downsides. Al has also been working on some vfs
and uaccess cleanups (particularly a goo splice model cleanup) that I
follow. But realistically, what _I_ consider cool small details is
just my own personal thing, there's things all over.

The virtual stack mapping also happens to mean that people who try to
do DMA from temporary buffers on the stack ("Don't do it!") now really
need to change their evil ways. So there is some fallout from this,
and I expect a couple of drivers to need minor fixes. But it's all for
a good cause, really (and it isn't all that common, because doing DMA
from the stack really has never been a good idea, and is generally not
even workable in most situations).

But there really is a lot of other things going on, and the shortlog
that I do for other releases is much too big during rc1. So as usual,
I'm appending my "mergelog" instead, which gives a very high-level
view of what I merged and from whom. And as usual, I want to point out
that the person I merge from is not necessarily the person who did the
work: we had 1500 people involved in this release, only the top-level
maintainers get credited in my mergelog.

Go forth and test,

Linus

---

Al Viro (7):
VFS splice updates
misc vfs updates
splice fixups
vfs xattr updates
more vfs updates
uaccess.h prepwork
more misc uaccess and vfs updates

Alex Williamson (1):
VFIO updates

Alexandre Belloni (1):
RTC updates

Andrew Morton (2):
updates
more updates

Anna Schumaker (1):
NFS client updates

Arnd Bergmann (8):
ARM SoC cleanups
ARM SoC platform updates
ARM SoC defconfig updates
ARM SoC 64-bit updates
ARM SoC driver updates
ARM DT updates
ARM 64-bit DT updates
ARM SoC late DT updates

Bjorn Andersson (2):
remoteproc updates
rpmsg updates

Bjorn Helgaas (1):
PCI updates

Bob Peterson (1):
gfs2 updates

Borislav Petkov (1):
EDAC updates

Brian Norris (1):
MTD updates

Bruce Fields (1):
nfsd updates

Chris Mason (2):
btrfs updates
btrfs fixes

Dan Williams (1):
libnvdimm updates

Darren Hart (1):
x86 platform drivers updates

Dave Airlie (1):
drm updates

Dave Chinner (2):
xfs and iomap updates
XFS support for shared data extents

David Kleikamp (1):
jfs updates

David Miller (5):
networking updates
sparc updates
networking fixups
networking fixes
networking fixes

David Teigland (1):
dlm fix

David Vrabel (1):
xen updates

Dmitry Torokhov (2):
input subsystem updates
some more input subsystem updates

Doug Ledford (5):
hdi1 rdma driver updates
more rdma updates
main rdma updates
more rdma updates
rdma qedr RoCE driver

Eric Biederman (1):
namespace updates

Geert Uytterhoeven (1):
m68k updates

Greg KH (5):
char/misc driver updates
driver core updates
tty and serial updates
usb/phy/extcon updates
staging and IIO updates

Greg Ungerer (1):
m68knommu updates

Guenter Roeck (1):
hwmon updates

Hans-Christian Noren Egtvedt (1):
avr32 update

Helge Deller (2):
parisc updates
parisc fixes

Herbert Xu (1):
crypto updates

Ilya Dryomov (1):
Ceph updates

Ingo Molnar (14):
RCU updates
core SMP updates
EFI updates
locking updates
perf updates
RAS updates
scheduler changes
x86 apic updates
low-level x86 updates
x86 boot updates
x86 cleanups
x86 platform changes
x86 timer updates
x86 vdso updates

Jacek Anaszewski (1):
LED driver updates

Jaegeuk Kim (1):
f2fs updates

James Bottomley (2):
SCSI updates
more SCSI updates

James Hogan (1):
metag architecture fix

James Morris (1):
security subsystem updates

Jan Kara (1):
misc filesystem and quota fixes

Jeff Layton (1):
file locking updates

Jens Axboe (3):
block layer updates
blk-mq irq/cpu mapping updates
blk-mq CPU hotplug update

Jesper Nilsson (1):
CRIS updates

Jiri Kosina (3):
HID updates
livepatching updates
trivial updates

Joerg Roedel (1):
IOMMU updates

Jonathan Corbet (2):
documentation updates
one more documentation update

Jussi Brar (1):
mailbox updates

Kees Cook (2):
pstore updates
gcc plugins update

Lee Jones (2):
backlight updates
MFD updates

Ley Foon Tan (1):
nios2 update

Linus Walleij (2):
pin control updates
GPIO updates

Luis de Bethencourt (1):
befs fixes

Mark Brown (3):
regmap updates
regulator updates
spi updates

Martin Schwidefsky (1):
s390 updates

Mauro Carvalho Chehab (1):
media updates

Max Filippov (1):
Xtensa updates

Michael Ellerman (2):
powerpc updates
more powerpc updates

Michal Marek (2):
kbuild updates
misc kbuild changes

Mike Marshall (1):
orangefs updates

Mike Snitzer (1):
device mapper updates

Miklos Szeredi (2):
fuse updates
overlayfs updates

Paul Moore (1):
audit updates

Radim Krčmář (1):
KVM updates

Rafael Wysocki (5):
power management updates
ACPI updates
PNP update
more power management updates
more ACPI updates

Ralf Baechle (1):
MIPS updates

Richard Weinberger (1):
UBI/UBIFS updates

Rob Herring (1):
DeviceTree updates

Russell King (3):
ARM fix
ARM updates
ARM pcmcia updates

Sebastian Reichel (2):
power supply and reset updates
HSI fix

Shaohua Li (1):
MD updates

Shuah Khan (1):
kselftest updates

Stephen Boyd (1):
clk framework updates

Steve French (1):
cifs fixes

Steven Rostedt (1):
tracing updates

Takashi Iwai (2):
sound updates
sound fixes

Ted Ts'o (1):
ext4 updates

Tejun Heo (3):
libata updates
percpu updates
cgroup updates

Thierry Reding (1):
pwm updates

Thomas Gleixner (9):
timer updates
irq updates
CPU hotplug updates
timer fix
irq fixes
scheduler fix
perf tooling updates
x86 updates
protection keys syscall interface

Tomi Valkeinen (1):
fbdev updates

Ulf Hansson (1):
MMC updates

Vineet Gupta (1):
ARC updates

Vinod Koul (1):
dmaengine updates

Will Deacon (1):
arm64 updates

Wim Van Sebroeck (1):
watchdog updates

Wolfram Sang (2):
i2c updates
more i2c updates

Zhang Rui (1):
thermal managament updates

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