Merge tag 'v5.1-rc1' into asoc-5.1

Linux 5.1-rc1

Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:

- a few misc things

- ocfs2 updates

- most of MM

* emailed patches from Andrew Morton <akpm@linux-foundation.o

Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:

- a few misc things

- ocfs2 updates

- most of MM

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (159 commits)
tools/testing/selftests/proc/proc-self-syscall.c: remove duplicate include
proc: more robust bulk read test
proc: test /proc/*/maps, smaps, smaps_rollup, statm
proc: use seq_puts() everywhere
proc: read kernel cpu stat pointer once
proc: remove unused argument in proc_pid_lookup()
fs/proc/thread_self.c: code cleanup for proc_setup_thread_self()
fs/proc/self.c: code cleanup for proc_setup_self()
proc: return exit code 4 for skipped tests
mm,mremap: bail out earlier in mremap_to under map pressure
mm/sparse: fix a bad comparison
mm/memory.c: do_fault: avoid usage of stale vm_area_struct
writeback: fix inode cgroup switching comment
mm/huge_memory.c: fix "orig_pud" set but not used
mm/hotplug: fix an imbalance with DEBUG_PAGEALLOC
mm/memcontrol.c: fix bad line in comment
mm/cma.c: cma_declare_contiguous: correct err handling
mm/page_ext.c: fix an imbalance with kmemleak
mm/compaction: pass pgdat to too_many_isolated() instead of zone
mm: remove zone_lru_lock() function, access ->lru_lock directly
...

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fs: kernfs: add poll file operation

Patch series "psi: pressure stall monitors", v3.

Android is adopting psi to detect and remedy memory pressure that
results in stuttering and decreased responsive

fs: kernfs: add poll file operation

Patch series "psi: pressure stall monitors", v3.

Android is adopting psi to detect and remedy memory pressure that
results in stuttering and decreased responsiveness on mobile devices.

Psi gives us the stall information, but because we're dealing with
latencies in the millisecond range, periodically reading the pressure
files to detect stalls in a timely fashion is not feasible. Psi also
doesn't aggregate its averages at a high enough frequency right now.

This patch series extends the psi interface such that users can
configure sensitive latency thresholds and use poll() and friends to be
notified when these are breached.

As high-frequency aggregation is costly, it implements an aggregation
method that is optimized for fast, short-interval averaging, and makes
the aggregation frequency adaptive, such that high-frequency updates
only happen while monitored stall events are actively occurring.

With these patches applied, Android can monitor for, and ward off,
mounting memory shortages before they cause problems for the user. For
example, using memory stall monitors in userspace low memory killer
daemon (lmkd) we can detect mounting pressure and kill less important
processes before device becomes visibly sluggish.

In our memory stress testing psi memory monitors produce roughly 10x
less false positives compared to vmpressure signals. Having ability to
specify multiple triggers for the same psi metric allows other parts of
Android framework to monitor memory state of the device and act
accordingly.

The new interface is straightforward. The user opens one of the
pressure files for writing and writes a trigger description into the
file descriptor that defines the stall state - some or full, and the
maximum stall time over a given window of time. E.g.:

/* Signal when stall time exceeds 100ms of a 1s window */
char trigger[] = "full 100000 1000000";
fd = open("/proc/pressure/memory");
write(fd, trigger, sizeof(trigger));
while (poll() >= 0) {
...
}
close(fd);

When the monitored stall state is entered, psi adapts its aggregation
frequency according to what the configured time window requires in order
to emit event signals in a timely fashion. Once the stalling subsides,
aggregation reverts back to normal.

The trigger is associated with the open file descriptor. To stop
monitoring, the user only needs to close the file descriptor and the
trigger is discarded.

Patches 1-4 prepare the psi code for polling support. Patch 5
implements the adaptive polling logic, the pressure growth detection
optimized for short intervals, and hooks up write() and poll() on the
pressure files.

The patches were developed in collaboration with Johannes Weiner.

This patch (of 5):

Kernfs has a standardized poll/notification mechanism for waking all
pollers on all fds when a filesystem node changes. To allow polling for
custom events, add a .poll callback that can override the default.

This is in preparation for pollable cgroup pressure files which have
per-fd trigger configurations.

Link: http://lkml.kernel.org/r/20190124211518.244221-2-surenb@google.com
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Merge tag 'v5.0-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into fbdev-for-next

Linux 5.0-rc5

Sync with upstream (which now contains fbdev-v5.0-rc3 changes) to
prepare a

Merge tag 'v5.0-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into fbdev-for-next

Linux 5.0-rc5

Sync with upstream (which now contains fbdev-v5.0-rc3 changes) to
prepare a base for fbdev-v5.1 changes.

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Merge tag 'v4.20' into for-linus

Sync with mainline to get linux/overflow.h among other things.

Merge tag 'v4.20' into next

Merge with mainline to bring in the new APIs.

Merge drm/drm-next into drm-misc-next

drm-next has been forwarded to 5.0-rc1, and we need it to apply the damage
helper for dirtyfb series from Noralf Trønnes.

Signed-off-by: Maxime Ripard <maxime.

Merge drm/drm-next into drm-misc-next

drm-next has been forwarded to 5.0-rc1, and we need it to apply the damage
helper for dirtyfb series from Noralf Trønnes.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>

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Merge tag 'v5.0-rc1' into next-general

Linux 5.0-rc1

Sync to pick up LSM stacking work (which is based on -rc1).

Merge drm/drm-next into drm-intel-next-queued

Generally catch up with 5.0-rc1, and specifically get the changes:

96d4f267e40f ("Remove 'type' argument from access_ok() function")
0b2c8f8b6b0c ("i91

Merge drm/drm-next into drm-intel-next-queued

Generally catch up with 5.0-rc1, and specifically get the changes:

96d4f267e40f ("Remove 'type' argument from access_ok() function")
0b2c8f8b6b0c ("i915: fix missing user_access_end() in page fault exception case")
594cc251fdd0 ("make 'user_access_begin()' do 'access_ok()'")

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

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Merge branch 'master' into fixes

We have a fix to apply on top of commit 96d4f267e40f ("Remove 'type'
argument from access_ok() function"), so merge master to get it.

Merge tag 'driver-core-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
"Here is the "big" set of driver core patches for 4.21-rc

Merge tag 'driver-core-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
"Here is the "big" set of driver core patches for 4.21-rc1.

It's not really big, just a number of small changes for some reported
issues, some documentation updates to hopefully make it harder for
people to abuse the driver model, and some other minor cleanups.

All of these have been in linux-next for a while with no reported
issues"

* tag 'driver-core-4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
mm, memory_hotplug: update a comment in unregister_memory()
component: convert to DEFINE_SHOW_ATTRIBUTE
sysfs: Disable lockdep for driver bind/unbind files
driver core: Add missing dev->bus->need_parent_lock checks
kobject: return error code if writing /sys/.../uevent fails
driver core: Move async_synchronize_full call
driver core: platform: Respect return code of platform_device_register_full()
kref/kobject: Improve documentation
drivers/base/memory.c: Use DEVICE_ATTR_RO and friends
driver core: Replace simple_strto{l,ul} by kstrtou{l,ul}
kernfs: Improve kernfs_notify() poll notification latency
kobject: Fix warnings in lib/kobject_uevent.c
kobject: drop unnecessary cast "%llu" for u64
driver core: fix comments for device_block_probing()
driver core: Replace simple_strtol by kstrtoint

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kernfs: Improve kernfs_notify() poll notification latency

kernfs_notify() does two notifications: poll and fsnotify. Originally,
both notifications were done from scheduled work context and all that

kernfs: Improve kernfs_notify() poll notification latency

kernfs_notify() does two notifications: poll and fsnotify. Originally,
both notifications were done from scheduled work context and all that
kernfs_notify() did was schedule the work.

This patch simply moves the poll notification from the scheduled work
handler to kernfs_notify(). The fsnotify notification still needs to be
done from scheduled work context because it can sleep (it needs to lock
a mutex).

If the poll notification is time critical (the notified thread needs to
wake as quickly as possible), it's better to do it from kernfs_notify()
directly. One example is calling sysfs_notify_dirent() from a hardware
interrupt handler to wake up a thread and handle the interrupt in user
space.

Signed-off-by: Radu Rendec <radu.rendec@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Merge tag 'v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into fbdev-for-next

Sync with upstream (which now contains fbdev-v4.19 changes) to
prepare a base for fbdev-v4

Merge tag 'v4.19-rc5' of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into fbdev-for-next

Sync with upstream (which now contains fbdev-v4.19 changes) to
prepare a base for fbdev-v4.20 changes.

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Merge drm/drm-next into drm-intel-next-queued

Catch up in general, and get DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT
specifically.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge tag 'y2038' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground into timers/core

Pull more y2038 work from Arnd Bergman:

y2038: convert more syscalls

Here is another set of syst

Merge tag 'y2038' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground into timers/core

Pull more y2038 work from Arnd Bergman:

y2038: convert more syscalls

Here is another set of system call changes to prepare the change over to
64-bit time_t. As before, the strategy is to change system calls that
take a 'struct timespec' argument over to 'struct __kernel_timespec',
which for now is defined to be the same but will get redefined to use a
64-bit time_t argument once we are ready to modify the system call tables.

The major change from previous patches is that the plan is no longer
to directly use the 'compat' system calls for providing compatibility
with the existing 32-bit time_t based entry points. Instead, we rename
the compat code to something that makes more sense on 32-bit architectures,
e.g. compat_timespec becomes old_timespec32.

With the renamed types in place, change over the 'stat' and 'utimes'
families of system calls, sched_rr_get_interval, recvmmsg and
rt_sigtimedwait. Another series for poll, select and io_pgetevents is
currently being tested.

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Merge tag 'v4.19-rc2' into next-general

Sync to Linux 4.19-rc2 for downstream developers.

Merge tag 'v4.19-rc1' into asoc-4.19

Linux 4.19-rc1

Merge branch 'perm-fix' into omap-for-v4.19/fixes-v2

Merge drm/drm-next into drm-misc-next

Now that 4.19-rc1 is cut, backmerge it into -misc-next.

Signed-off-by: Sean Paul <seanpaul@chromium.org>

Merge branch 'linus/master' into rdma.git for-next

rdma.git merge resolution for the 4.19 merge window

Conflicts:
drivers/infiniband/core/rdma_core.c
- Use the rdma code and revise with the new

Merge branch 'linus/master' into rdma.git for-next

rdma.git merge resolution for the 4.19 merge window

Conflicts:
drivers/infiniband/core/rdma_core.c
- Use the rdma code and revise with the new spelling for
atomic_fetch_add_unless
drivers/nvme/host/rdma.c
- Replace max_sge with max_send_sge in new blk code
drivers/nvme/target/rdma.c
- Use the blk code and revise to use NULL for ib_post_recv when
appropriate
- Replace max_sge with max_recv_sge in new blk code
net/rds/ib_send.c
- Use the net code and revise to use NULL for ib_post_recv when
appropriate

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:
"Highlights:

- Gustavo A. R. Silva keeps working on the implicit switch fallthru

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:
"Highlights:

- Gustavo A. R. Silva keeps working on the implicit switch fallthru
changes.

- Support 802.11ax High-Efficiency wireless in cfg80211 et al, From
Luca Coelho.

- Re-enable ASPM in r8169, from Kai-Heng Feng.

- Add virtual XFRM interfaces, which avoids all of the limitations of
existing IPSEC tunnels. From Steffen Klassert.

- Convert GRO over to use a hash table, so that when we have many
flows active we don't traverse a long list during accumluation.

- Many new self tests for routing, TC, tunnels, etc. Too many
contributors to mention them all, but I'm really happy to keep
seeing this stuff.

- Hardware timestamping support for dpaa_eth/fsl-fman from Yangbo Lu.

- Lots of cleanups and fixes in L2TP code from Guillaume Nault.

- Add IPSEC offload support to netdevsim, from Shannon Nelson.

- Add support for slotting with non-uniform distribution to netem
packet scheduler, from Yousuk Seung.

- Add UDP GSO support to mlx5e, from Boris Pismenny.

- Support offloading of Team LAG in NFP, from John Hurley.

- Allow to configure TX queue selection based upon RX queue, from
Amritha Nambiar.

- Support ethtool ring size configuration in aquantia, from Anton
Mikaev.

- Support DSCP and flowlabel per-transport in SCTP, from Xin Long.

- Support list based batching and stack traversal of SKBs, this is
very exciting work. From Edward Cree.

- Busyloop optimizations in vhost_net, from Toshiaki Makita.

- Introduce the ETF qdisc, which allows time based transmissions. IGB
can offload this in hardware. From Vinicius Costa Gomes.

- Add parameter support to devlink, from Moshe Shemesh.

- Several multiplication and division optimizations for BPF JIT in
nfp driver, from Jiong Wang.

- Lots of prepatory work to make more of the packet scheduler layer
lockless, when possible, from Vlad Buslov.

- Add ACK filter and NAT awareness to sch_cake packet scheduler, from
Toke Høiland-Jørgensen.

- Support regions and region snapshots in devlink, from Alex Vesker.

- Allow to attach XDP programs to both HW and SW at the same time on
a given device, with initial support in nfp. From Jakub Kicinski.

- Add TLS RX offload and support in mlx5, from Ilya Lesokhin.

- Use PHYLIB in r8169 driver, from Heiner Kallweit.

- All sorts of changes to support Spectrum 2 in mlxsw driver, from
Ido Schimmel.

- PTP support in mv88e6xxx DSA driver, from Andrew Lunn.

- Make TCP_USER_TIMEOUT socket option more accurate, from Jon
Maxwell.

- Support for templates in packet scheduler classifier, from Jiri
Pirko.

- IPV6 support in RDS, from Ka-Cheong Poon.

- Native tproxy support in nf_tables, from Máté Eckl.

- Maintain IP fragment queue in an rbtree, but optimize properly for
in-order frags. From Peter Oskolkov.

- Improvde handling of ACKs on hole repairs, from Yuchung Cheng"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1996 commits)
bpf: test: fix spelling mistake "REUSEEPORT" -> "REUSEPORT"
hv/netvsc: Fix NULL dereference at single queue mode fallback
net: filter: mark expected switch fall-through
xen-netfront: fix warn message as irq device name has '/'
cxgb4: Add new T5 PCI device ids 0x50af and 0x50b0
net: dsa: mv88e6xxx: missing unlock on error path
rds: fix building with IPV6=m
inet/connection_sock: prefer _THIS_IP_ to current_text_addr
net: dsa: mv88e6xxx: bitwise vs logical bug
net: sock_diag: Fix spectre v1 gadget in __sock_diag_cmd()
ieee802154: hwsim: using right kind of iteration
net: hns3: Add vlan filter setting by ethtool command -K
net: hns3: Set tx ring' tc info when netdev is up
net: hns3: Remove tx ring BD len register in hns3_enet
net: hns3: Fix desc num set to default when setting channel
net: hns3: Fix for phy link issue when using marvell phy driver
net: hns3: Fix for information of phydev lost problem when down/up
net: hns3: Fix for command format parsing error in hclge_is_all_function_id_zero
net: hns3: Add support for serdes loopback selftest
bnxt_en: take coredump_record structure off stack
...

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Merge remote-tracking branch 'net-next/master'

Merge drm/drm-next into drm-intel-next-queued

We need a backmerge to get DP_DPCD_REV_14 before we push other
i915 changes to dinq that could break compilation.

Signed-off-by: Rodrigo Vivi <rodrigo.

Merge drm/drm-next into drm-intel-next-queued

We need a backmerge to get DP_DPCD_REV_14 before we push other
i915 changes to dinq that could break compilation.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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Merge branch 'Make-sys-class-net-per-net-namespace-objects-belong-to-container'

Tyler Hicks says:

====================
Make /sys/class/net per net namespace objects belong to container

This is a r

Merge branch 'Make-sys-class-net-per-net-namespace-objects-belong-to-container'

Tyler Hicks says:

====================
Make /sys/class/net per net namespace objects belong to container

This is a revival of an older patch set from Dmitry Torokhov:

https://lore.kernel.org/lkml/1471386795-32918-1-git-send-email-dmitry.torokhov@gmail.com/

My submission of v2 is here:

https://lore.kernel.org/lkml/1531497949-1766-1-git-send-email-tyhicks@canonical.com/

Here's Dmitry's description:

There are objects in /sys hierarchy (/sys/class/net/) that logically
belong to a namespace/container. Unfortunately all sysfs objects start
their life belonging to global root, and while we could change
ownership manually, keeping tracks of all objects that come and go is
cumbersome. It would be better if kernel created them using correct
uid/gid from the beginning.

This series changes kernfs to allow creating object's with arbitrary
uid/gid, adds get_ownership() callback to ktype structure so subsystems
could supply their own logic (likely tied to namespace support) for
determining ownership of kobjects, and adjusts sysfs code to make use
of this information. Lastly net-sysfs is adjusted to make sure that
objects in net namespace are owned by the root user from the owning
user namespace.

Note that we do not adjust ownership of objects moved into a new
namespace (as when moving a network device into a container) as
userspace can easily do it.

I'm reviving this patch set because we would like this feature for
system containers. One specific use case that we have is that libvirt is
unable to configure its bridge device inside of a system container due
to the bridge files in /sys/class/net/ being owned by init root instead
of container root. The last two patches in this set are patches that
I've added to Dmitry's original set to allow such configuration of the
bridge device.

Eric had previously provided feedback that he didn't favor these changes
affecting all layers of the stack and that most of the changes could
remain local to drivers/base/core.c. That feedback is certainly sensible
but I wanted to send out v2 of the patch set without making that large
of a change since quite a bit of time has passed and the bridge changes
in the last patch of this set shows that not all of the changes will be
local to drivers/base/core.c. I'm happy to make the changes if the
original request still stands.

* Changes since v2:
- Added my Co-Developed-by and Signed-off-by tags to all of Dmitry's
patches that I've modified
- Patch 1 received build failure fixes in
arch/x86/kernel/cpu/intel_rdt_rdtgroup.c
- Patch 2 was updated to drop the declaration of sysfs_add_file() from
sysfs.h since the patch removed all other uses of the function
- Patch 5 is a new patch that prevents tx_maxrate from being written
to from inside of a container
+ Maybe I'm being too cautious here but the restriction can always
be loosened up later
- Patches 6 and 7 were updated to make net_ns_get_ownership() always
initialize uid and gid, even when the network namespace is NULL, so
that it isn't a dangerous function to reuse
+ Requested by Christian Brauner
- I've looked at all sysfs attributes affected by this patch set and
feel comfortable about the changes. There are quite a few affected
attributes that don't have any capable()/ns_capable() checks in
their store operations (per_bond_attrs, at91_sysfs_attrs,
sysfs_grcan_attrs, ican3_sysfs_attrs, cdc_ncm_sysfs_attrs,
qmi_wwan_sysfs_attrs) but I think this is acceptable. It means that
container root, rather than specifically CAP_NET_ADMIN inside of the
network namespace that the device belongs to, can write to those
device attributes. It's the same situation that those devices have
today in that init root is able to write to the attributes without
necessarily having CAP_NET_ADMIN. I think that this should probably
be fixed in order to be consistent with what netdev_store() does by
verifying CAP_NET_ADMIN in the network namespace but that it doesn't
need to happen in this patch set.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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kernfs: allow creating kernfs objects with arbitrary uid/gid

This change allows creating kernfs files and directories with arbitrary
uid/gid instead of always using GLOBAL_ROOT_UID/GID by extending

kernfs: allow creating kernfs objects with arbitrary uid/gid

This change allows creating kernfs files and directories with arbitrary
uid/gid instead of always using GLOBAL_ROOT_UID/GID by extending
kernfs_create_dir_ns() and kernfs_create_file_ns() with uid/gid arguments.
The "simple" kernfs_create_file() and kernfs_create_dir() are left alone
and always create objects belonging to the global root.

When creating symlinks ownership (uid/gid) is taken from the target kernfs
object.

Co-Developed-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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