Commit Graph

626916 Commits

Author SHA1 Message Date
Andrew Collins
93409033ae net: Add netdev all_adj_list refcnt propagation to fix panic
This is a respin of a patch to fix a relatively easily reproducible kernel
panic related to the all_adj_list handling for netdevs in recent kernels.

The following sequence of commands will reproduce the issue:

ip link add link eth0 name eth0.100 type vlan id 100
ip link add link eth0 name eth0.200 type vlan id 200
ip link add name testbr type bridge
ip link set eth0.100 master testbr
ip link set eth0.200 master testbr
ip link add link testbr mac0 type macvlan
ip link delete dev testbr

This creates an upper/lower tree of (excuse the poor ASCII art):

            /---eth0.100-eth0
mac0-testbr-
            \---eth0.200-eth0

When testbr is deleted, the all_adj_lists are walked, and eth0 is deleted twice from
the mac0 list. Unfortunately, during setup in __netdev_upper_dev_link, only one
reference to eth0 is added, so this results in a panic.

This change adds reference count propagation so things are handled properly.

Matthias Schiffer reported a similar crash in batman-adv:

https://github.com/freifunk-gluon/gluon/issues/680
https://www.open-mesh.org/issues/247

which this patch also seems to resolve.

Signed-off-by: Andrew Collins <acollins@cradlepoint.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-04 02:05:31 -04:00
Raju Lakkaraju
a4cc96d1f0 net: phy: Add Edge-rate driver for Microsemi PHYs.
Edge-rate:
As system and networking speeds increase, a signal's output transition,
also know as the edge rate or slew rate (V/ns), takes on greater importance
because high-speed signals come with a price. That price is an assortment of
interference problems like ringing on the line, signal overshoot and
undershoot, extended signal settling times, crosstalk noise, transmission
line reflections, false signal detection by the receiving device and
electromagnetic interference (EMI) -- all of which can negate the potential
gains designers are seeking when they try to increase system speeds through
the use of higher performance logic devices. The fact is, faster signaling
edge rates can cause a higher level of electrical noise or other type of
interference that can actually lead to slower line speeds and lower maximum
system frequencies. This parameter allow the board designers to change the
driving strange, and thereby change the EMI behavioral.

Edge-rate parameters (vddmac, edge-slowdown) get from Device Tree.

Tested on Beaglebone Black with VSC 8531 PHY.

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microsemi.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-04 00:47:30 -04:00
Benjamin Poirier
277964e19e vmxnet3: Wake queue from reset work
vmxnet3_reset_work() expects tx queues to be stopped (via
vmxnet3_quiesce_dev -> netif_tx_disable). However, this races with the
netif_wake_queue() call in netif_tx_timeout() such that the driver's
start_xmit routine may be called unexpectedly, triggering one of the BUG_ON
in vmxnet3_map_pkt with a stack trace like this:

RIP: 0010:[<ffffffffa00cf4bc>] vmxnet3_map_pkt+0x3ac/0x4c0 [vmxnet3]
 [<ffffffffa00cf7e0>] vmxnet3_tq_xmit+0x210/0x4e0 [vmxnet3]
 [<ffffffff813ab144>] dev_hard_start_xmit+0x2e4/0x4c0
 [<ffffffff813c956e>] sch_direct_xmit+0x17e/0x1e0
 [<ffffffff813c96a7>] __qdisc_run+0xd7/0x130
 [<ffffffff813a6a7a>] net_tx_action+0x10a/0x200
 [<ffffffff810691df>] __do_softirq+0x11f/0x260
 [<ffffffff81472fdc>] call_softirq+0x1c/0x30
 [<ffffffff81004695>] do_softirq+0x65/0xa0
 [<ffffffff81069b89>] local_bh_enable_ip+0x99/0xa0
 [<ffffffffa031ff36>] destroy_conntrack+0x96/0x110 [nf_conntrack]
 [<ffffffff813d65e2>] nf_conntrack_destroy+0x12/0x20
 [<ffffffff8139c6d5>] skb_release_head_state+0xb5/0xf0
 [<ffffffff8139d299>] skb_release_all+0x9/0x20
 [<ffffffff8139cfe9>] __kfree_skb+0x9/0x90
 [<ffffffffa00d0069>] vmxnet3_quiesce_dev+0x209/0x340 [vmxnet3]
 [<ffffffffa00d020a>] vmxnet3_reset_work+0x6a/0xa0 [vmxnet3]
 [<ffffffff8107d7cc>] process_one_work+0x16c/0x350
 [<ffffffff810804fa>] worker_thread+0x17a/0x410
 [<ffffffff810848c6>] kthread+0x96/0xa0
 [<ffffffff81472ee4>] kernel_thread_helper+0x4/0x10

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-04 00:36:13 -04:00
Linus Torvalds
21f54ddae4 Using BUG_ON() as an assert() is _never_ acceptable
That just generally kills the machine, and makes debugging only much
harder, since the traces may long be gone.

Debugging by assert() is a disease.  Don't do it.  If you can continue,
you're much better off doing so with a live machine where you have a
much higher chance that the report actually makes it to the system logs,
rather than result in a machine that is just completely dead.

The only valid situation for BUG_ON() is when continuing is not an
option, because there is massive corruption.  But if you are just
verifying that something is true, you warn about your broken assumptions
(preferably just once), and limp on.

Fixes: 22f2ac51b6 ("mm: workingset: fix crash in shadow node shrinker caused by replace_page_cache_page()")
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-03 21:03:48 -07:00
David S. Miller
0438e3c88c Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue
Jeff Kirsher says:

====================
100GbE Intel Wired LAN Driver Updates 2016-10-02

This series contains updates to fm10k only.

Jake fixes an issue where PTP applications requesting software timestamps
may complain that the requested mode is not supported, so add a generic
callback for those drivers that have software transmit timestamp support
enabled.  Then provides a trivial cleanup where a code was not wrapped
properly.  Got make sure that code looks good in a 80 character limit.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 23:28:50 -04:00
Guilherme G Piccoli
edfc23ee3e i40e: avoid NULL pointer dereference and recursive errors on early PCI error
Although rare, it's possible to hit PCI error early on device
probe, meaning possibly some structs are not entirely initialized,
and some might even be completely uninitialized, leading to NULL
pointer dereference.

The i40e driver currently presents a "bad" behavior if device hits
such early PCI error: firstly, the struct i40e_pf might not be
attached to pci_dev yet, leading to a NULL pointer dereference on
access to pf->state.

Even checking if the struct is NULL and avoiding the access in that
case isn't enough, since the driver cannot recover from PCI error
that early; in our experiments we saw multiple failures on kernel
log, like:

  [549.664] i40e 0007:01:00.1: Initial pf_reset failed: -15
  [549.664] i40e: probe of 0007:01:00.1 failed with error -15
  [...]
  [871.644] i40e 0007:01:00.1: The driver for the device stopped because the
  device firmware failed to init. Try updating your NVM image.
  [871.644] i40e: probe of 0007:01:00.1 failed with error -32
  [...]
  [872.516] i40e 0007:01:00.0: ARQ: Unknown event 0x0000 ignored

Between the first probe failure (error -15) and the second (error -32)
another PCI error happened due to the first bad probe. Also, driver
started to flood console with those ARQ event messages.

This patch will prevent these issues by allowing error recovery
mechanism to remove the failed device from the system instead of
trying to recover from early PCI errors during device probe.

CC: <stable@vger.kernel.org>
Signed-off-by: Guilherme G Piccoli <gpiccoli@linux.vnet.ibm.com>
Acked-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 23:26:54 -04:00
David S. Miller
2f8fab7ad7 Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue
Jeff Kirsher says:

====================
40GbE Intel Wired LAN Driver Updates 2016-10-03

This series contains fixes to i40e only.

Stefan Assmann provides the changes in this series to resolve an issue
where when we run out of MSIx vectors, iWARP gets disabled automatically.
First adds a check for "no vectors left" during MSIx vector allocation
for VMDq, which will prevent more vectors being allocated than available.
Then fixed the MSIx vector redistribution when we reach the hardware limit
for vectors so that additional features like VMDq, iWARP, etc do not get
starved for vectors because the PF is hogging all the resources.  Lastly,
fix the issue for flow director by moving the check for the reaching the
vector limit earlier in the code so that a decision can be made on
disabling flow director.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 23:26:18 -04:00
David S. Miller
b462d22bf3 Merge branch 'qed-qedr-infrastructure'
Yuval Mintz says:

====================
qed*: Add qedr infrastructure support

In the last couple of weeks we've been sending RFCs for the qedr
driver - the RoCE driver for QLogic FastLinQ 4xxxx line of adapters.
Latest RFC can be found at [1].

At Doug's advice [2], we've decided to split the series into two:
 - first part contains the qed backbone that's necessary for all the
configurations relating to the qedr driver, as well as the qede
infrastructure that is used for communication between the qedr and qede.
 - Second part consists of the actual qedr driver and introduces almost
no changes to qed/qede.

This is the first of said two parts. The second half would be sent
later this week.

The only 'oddity' in the devision are the Kconfig options -
As this series introduces both LL2 and QEDR-based logic in qed/qede,
I wanted to add the CONFIG_INFINIBAND_QEDR option here [with default n].
Otherwise, a lot of the code introduced would be dead-code [won't even
be compiled] until qedr is accepted.
As a result I've placed the config option in an odd place - under
qlogic's Kconfig. The second series would then remove that option
and add it in its correct place under the infiniband Kconfig.
[I'm fine with pushing it there to begin with, but I didn't want to
'contaminate' non-qlogic configuration files with half-baked options].

Dave - I don't think you were E-mailed with Doug's suggestion.
I think the notion was to have the two halves accepted side-by-side,
but actually the first has no dependency issues, so it's also
possible to simply take this first to net-next, and push the qedr
into rdma once it's merged. But it's basically up to you and Doug;
We'd align with whatever suits you best.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 23:22:52 -04:00
Ram Amrani
abd49676c7 qed: Add RoCE ll2 & GSI support
Add the RoCE-specific LL2 logic [as well as GSI support] over
the 'generic' LL2 interface.

Signed-off-by: Ram Amrani <Ram.Amrani@caviumnetworks.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 23:22:47 -04:00
Ram Amrani
ee8eaea30b qed: Add support for memory registeration verbs
Add slowpath configuration support for user, dma and memory
regions registration.

Signed-off-by: Ram Amrani <Ram.Amrani@caviumnetworks.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 23:22:47 -04:00
Ram Amrani
f109394033 qed: Add support for QP verbs
Add support for the slowpath configurations of Queue Pair verbs
which adds, deletes, modifies and queries Queue Pairs.

Signed-off-by: Ram Amrani <Ram.Amrani@caviumnetworks.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 23:22:47 -04:00
Ram Amrani
c295f86e60 qed: PD,PKEY and CQ verb support
Add support for the configurations of the protection domain and
completion queues.

Signed-off-by: Ram Amrani <Ram.Amrani@caviumnetworks.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 23:22:47 -04:00
Ram Amrani
51ff17251c qed: Add support for RoCE hw init
This adds the backbone required for the various HW initalizations
which are necessary for the qedr driver - FW notification, resource
initializations, etc.

Signed-off-by: Ram Amrani <Ram.Amrani@caviumnetworks.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 23:22:46 -04:00
Ram Amrani
cee9fbd8e2 qede: Add qedr framework
Adds a skeletal implementation of the qede RoCE driver -
The qedr has some dependencies of the state of the underlying base
interface. This adds some logic required with mutual registrations
and the ability to pass updates on 'intresting' events.

Signed-off-by: Ram Amrani <Ram.Amrani@caviumnetworks.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 23:22:46 -04:00
Yuval Mintz
0a7fb11c23 qed: Add Light L2 support
Other protocols beside the networking driver need the ability
of passing some L2 traffic, usually [although not limited] for the
purpose of some management traffic.

Signed-off-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
Signed-off-by: Ram Amrani <Ram.Amrani@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 23:22:46 -04:00
Linus Torvalds
e6445f52d9 USB/PHY/EXTCON patches for 4.9-rc1
Here is the big USB, and PHY, and extcon, patchsets for 4.9-rc1.
 
 Full details are in the shortlog, but generally a lot of new hardware
 support, usb gadget updates, and Wolfram's great cleanup of USB error
 message handling, making the kernel image a tad bit smaller.
 
 All of this has been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull usb/phy/extcon updates from Greg KH:
 "Here is the big USB, and PHY, and extcon, patchsets for 4.9-rc1.

  Full details are in the shortlog, but generally a lot of new hardware
  support, usb gadget updates, and Wolfram's great cleanup of USB error
  message handling, making the kernel image a tad bit smaller.

  All of this has been in linux-next with no reported issues"

* tag 'usb-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (343 commits)
  Revert "usbtmc: convert to devm_kzalloc"
  USB: serial: cp210x: Add ID for a Juniper console
  usb: Kconfig: using select for USB_COMMON dependency
  bluetooth: bcm203x: don't print error when allocating urb fails
  mmc: host: vub300: don't print error when allocating urb fails
  usb: hub: change CLEAR_FEATURE to SET_FEATURE
  usb: core: Introduce a USB port LED trigger
  USB: bcma: drop Northstar PHY 2.0 initialization code
  usb: core: hcd: add missing header dependencies
  usb: musb: da8xx: fix error handling message in probe
  usb: musb: Fix session based PM for first invalid VBUS
  usb: musb: Fix PM runtime for disconnect after unconfigure
  musb: Export musb_root_disconnect for use in modules
  usb: misc: legousbtower: Fix NULL pointer deference
  cdc-acm: hardening against malicious devices
  Revert "usb: gadget: NCM: Protect dev->port_usb using dev->lock"
  include: extcon: Fix compilation error caused because of incomplete merge
  MAINTAINERS: add tree entry for USB Serial
  phy-twl4030-usb: initialize charging-related stuff via pm_runtime
  phy-twl4030-usb: better handle musb_mailbox() failure
  ...
2016-10-03 20:17:35 -07:00
Mark Brown
f785fb2ec0 Merge remote-tracking branches 'regmap/topic/core' and 'regmap/topic/debugfs' into regmap-next 2016-10-04 05:17:12 +02:00
Linus Torvalds
e6dce825fb TTY/Serial patches for 4.9-rc1
Here is the big TTY and Serial patch set for 4.9-rc1.
 
 It also includes some drivers/dma/ changes, as those were needed by some
 serial drivers, and they were all acked by the DMA maintainer.  Also in
 here is the long-suffering ACPI SPCR patchset, which was passed around
 from maintainer to maintainer like a hot-potato.  Seems I was the
 sucker^Wlucky one.  All of those patches have been acked by the various
 subsystem maintainers as well.
 
 All of this has been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty and serial updates from Greg KH:
 "Here is the big tty and serial patch set for 4.9-rc1.

  It also includes some drivers/dma/ changes, as those were needed by
  some serial drivers, and they were all acked by the DMA maintainer.

  Also in here is the long-suffering ACPI SPCR patchset, which was
  passed around from maintainer to maintainer like a hot-potato. Seems I
  was the sucker^Wlucky one. All of those patches have been acked by the
  various subsystem maintainers as well.

  All of this has been in linux-next with no reported issues"

* tag 'tty-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (111 commits)
  Revert "serial: pl011: add console matching function"
  MAINTAINERS: update entry for atmel_serial driver
  serial: pl011: add console matching function
  ARM64: ACPI: enable ACPI_SPCR_TABLE
  ACPI: parse SPCR and enable matching console
  of/serial: move earlycon early_param handling to serial
  Revert "drivers/tty: Explicitly pass current to show_stack"
  tty: amba-pl011: Don't complain on -EPROBE_DEFER when no irq
  nios2: dts: 10m50: Add tx-threshold parameter
  serial: 8250: Set Altera 16550 TX FIFO Threshold
  serial: 8250: of: Load TX FIFO Threshold from DT
  Documentation: dt: serial: Add TX FIFO threshold parameter
  drivers/tty: Explicitly pass current to show_stack
  serial: imx: Fix DCD reading
  serial: stm32: mark symbols static where possible
  serial: xuartps: Add some register initialisation to cdns_early_console_setup()
  serial: xuartps: Removed unwanted checks while reading the error conditions
  serial: xuartps: Rewrite the interrupt handling logic
  serial: stm32: use mapbase instead of membase for DMA
  tty/serial: atmel: fix fractional baud rate computation
  ...
2016-10-03 20:11:49 -07:00
Linus Torvalds
9929780e86 Driver core patches for 4.9-rc1
Here are the "big" driver core patches for 4.9-rc1.  Also in here are a
 number of debugfs fixes that cropped up due to the changes that happened
 in 4.8 for that filesystem.  Overall, nothing major, just a few fixes
 and cleanups.
 
 All of these have been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here are the "big" driver core patches for 4.9-rc1. Also in here are a
  number of debugfs fixes that cropped up due to the changes that
  happened in 4.8 for that filesystem. Overall, nothing major, just a
  few fixes and cleanups.

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

* tag 'driver-core-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (23 commits)
  drivers: dma-coherent: Move spinlock in dma_alloc_from_coherent()
  drivers: dma-coherent: Fix DMA coherent size for less than page
  MAINTAINERS: extend firmware_class maintainer list
  debugfs: propagate release() call result
  driver-core: platform: Catch errors from calls to irq_get_irq_data
  sysfs print name of undiscoverable attribute group
  carl9170: fix debugfs crashes
  b43legacy: fix debugfs crash
  b43: fix debugfs crash
  debugfs: introduce a public file_operations accessor
  device core: Remove deprecated create_singlethread_workqueue
  drivers/base dmam_declare_coherent_memory leaks
  platform: don't return 0 from platform_get_irq[_byname]() on error
  cpu: clean up register_cpu func
  dma-mapping: use vma_pages().
  drivers: dma-coherent: use vma_pages().
  attribute_container: Fix typo
  base: soc: make it explicitly non-modular
  drivers: base: dma-mapping: page align the size when unmap_kernel_range
  platform driver: fix use-after-free in platform_device_del()
  ...
2016-10-03 20:03:24 -07:00
Linus Torvalds
7a53eea1f7 Char/Misc driver update for 4.9-rc1
Here's the "big" char and misc driver update for 4.9-rc1.
 
 Lots of little things here, all over the driver tree for subsystems that
 flow through me.  Nothing major that I can discern, full details are in
 the shortlog.
 
 All have been in the linux-next tree with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here's the "big" char and misc driver update for 4.9-rc1.

  Lots of little things here, all over the driver tree for subsystems
  that flow through me. Nothing major that I can discern, full details
  are in the shortlog.

  All have been in the linux-next tree with no reported issues"

* tag 'char-misc-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (144 commits)
  drivers/misc/hpilo: Changes to support new security states in iLO5 FW
  at25: fix debug and error messaging
  misc/genwqe: ensure zero initialization
  vme: fake: remove unexpected unlock in fake_master_set()
  vme: fake: mark symbols static where possible
  spmi: pmic-arb: Return an error code if sanity check fails
  Drivers: hv: get rid of id in struct vmbus_channel
  Drivers: hv: make VMBus bus ids persistent
  mcb: Add a dma_device to mcb_device
  mcb: Enable PCI bus mastering by default
  mei: stop the stall timer worker if not needed
  clk: probe common clock drivers earlier
  vme: fake: fix build for 64-bit dma_addr_t
  ttyprintk: Neaten and simplify printing
  mei: me: add kaby point device ids
  coresight: tmc: mark symbols static where possible
  coresight: perf: deal with error condition properly
  Drivers: hv: hv_util: Avoid dynamic allocation in time synch
  fpga manager: Add hardware dependency to Zynq driver
  Drivers: hv: utils: Support TimeSync version 4.0 protocol samples.
  ...
2016-10-03 19:57:49 -07:00
Linus Torvalds
597f03f9d1 Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull CPU hotplug updates from Thomas Gleixner:
 "Yet another batch of cpu hotplug core updates and conversions:

   - Provide core infrastructure for multi instance drivers so the
     drivers do not have to keep custom lists.

   - Convert custom lists to the new infrastructure. The block-mq custom
     list conversion comes through the block tree and makes the diffstat
     tip over to more lines removed than added.

   - Handle unbalanced hotplug enable/disable calls more gracefully.

   - Remove the obsolete CPU_STARTING/DYING notifier support.

   - Convert another batch of notifier users.

   The relayfs changes which conflicted with the conversion have been
   shipped to me by Andrew.

   The remaining lot is targeted for 4.10 so that we finally can remove
   the rest of the notifiers"

* 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (46 commits)
  cpufreq: Fix up conversion to hotplug state machine
  blk/mq: Reserve hotplug states for block multiqueue
  x86/apic/uv: Convert to hotplug state machine
  s390/mm/pfault: Convert to hotplug state machine
  mips/loongson/smp: Convert to hotplug state machine
  mips/octeon/smp: Convert to hotplug state machine
  fault-injection/cpu: Convert to hotplug state machine
  padata: Convert to hotplug state machine
  cpufreq: Convert to hotplug state machine
  ACPI/processor: Convert to hotplug state machine
  virtio scsi: Convert to hotplug state machine
  oprofile/timer: Convert to hotplug state machine
  block/softirq: Convert to hotplug state machine
  lib/irq_poll: Convert to hotplug state machine
  x86/microcode: Convert to hotplug state machine
  sh/SH-X3 SMP: Convert to hotplug state machine
  ia64/mca: Convert to hotplug state machine
  ARM/OMAP/wakeupgen: Convert to hotplug state machine
  ARM/shmobile: Convert to hotplug state machine
  arm64/FP/SIMD: Convert to hotplug state machine
  ...
2016-10-03 19:43:08 -07:00
Linus Torvalds
999dcbe241 Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq updates from Thomas Gleixner:
 "The irq departement proudly presents:

   - A rework of the core infrastructure to optimally spread interrupt
     for multiqueue devices. The first version was a bit naive and
     failed to take thread siblings and other details into account.
     Developed in cooperation with Christoph and Keith.

   - Proper delegation of softirqs to ksoftirqd, so if ksoftirqd is
     active then no further softirq processsing on interrupt return
     happens. Otherwise we try to delegate and still run another batch
     of network packets in the irq return path, which then tries to
     delegate to ksoftirqd .....

   - A proper machine parseable sysfs based alternative for
     /proc/interrupts.

   - ACPI support for the GICV3-ITS and ARM interrupt remapping

   - Two new irq chips from the ARM SoC zoo: STM32-EXTI and MVEBU-PIC

   - A new irq chip for the JCore (SuperH)

   - The usual pile of small fixlets in core and irqchip drivers"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (42 commits)
  softirq: Let ksoftirqd do its job
  genirq: Make function __irq_do_set_handler() static
  ARM/dts: Add EXTI controller node to stm32f429
  ARM/STM32: Select external interrupts controller
  drivers/irqchip: Add STM32 external interrupts support
  Documentation/dt-bindings: Document STM32 EXTI controller bindings
  irqchip/mips-gic: Use for_each_set_bit to iterate over local IRQs
  pci/msi: Retrieve affinity for a vector
  genirq/affinity: Remove old irq spread infrastructure
  genirq/msi: Switch to new irq spreading infrastructure
  genirq/affinity: Provide smarter irq spreading infrastructure
  genirq/msi: Add cpumask allocation to alloc_msi_entry
  genirq: Expose interrupt information through sysfs
  irqchip/gicv3-its: Use MADT ITS subtable to do PCI/MSI domain initialization
  irqchip/gicv3-its: Factor out PCI-MSI part that might be reused for ACPI
  irqchip/gicv3-its: Probe ITS in the ACPI way
  irqchip/gicv3-its: Refactor ITS DT init code to prepare for ACPI
  irqchip/gicv3-its: Cleanup for ITS domain initialization
  PCI/MSI: Setup MSI domain on a per-device basis using IORT ACPI table
  ACPI: Add new IORT functions to support MSI domain handling
  ...
2016-10-03 19:10:15 -07:00
Stefan Assmann
abd97a94ba i40e: fix sideband flow director vector allocation
Currently if the MSI-X vector limit is reached the sideband flow
director gets disabled. A bit too early to make that decision, as
vectors may get re-distributed. So move the check further back.

Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-10-03 19:10:05 -07:00
Stefan Assmann
4ce20abc64 i40e: fix MSI-X vector redistribution if hw limit is reached
The driver allocates 1 vector per CPU thread and the current hardware
limit for vectors is 129 per PF. On systems with 128 or more threads
this currently means all vectors are used by the PF leaving no room for
additional features like VMDq, iWARP, etc...
The code that should redistribute the vectors in this case is broken and
never triggers. Fixed the code so that it actually triggers if the
hardware limit is reached and adjust the number of queue pairs
accordingly.
Also the number of initially requested iWARP vectors was not properly
saved when the vector limit was reached, and therefore always zero.

Comparison with debug statement.
Before:
i40e 0000:2d:00.0: VMDq disabled, not enough MSI-X vectors
i40e 0000:2d:00.0: IWARP disabled, not enough MSI-X vectors
i40e 00.0 MSI-X vector distribution: PF 128, VMDq 0, FDSB 0, iWARP 0
After:
i40e 0000:2d:00.0: MSI-X vector limit reached, attempting to redistribute vectors
i40e 00.0 MSI-X vector distribution: PF 78, VMDq 8, FDSB 0, iWARP 42

Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-10-03 19:09:09 -07:00
Stefan Assmann
9ca57e97a7 i40e: check if vectors are already depleted when doing VMDq allocation
During MSI-X vector allocation for VMDq, a check for "no vectors left"
was missing, add it. This prevents more vectors to be allocated than
available.

Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2016-10-03 19:07:43 -07:00
Christophe Jaillet
b9118b7221 ptp: Fix resource leak in case of error
A call to 'ida_simple_remove()' is missing in the error handling path.

This as been spotted with the following coccinelle script which tries to
detect missing 'ida_simple_remove()' call in error handling paths.

///////////////
@@
expression x;
identifier l;
@@

*   x = ida_simple_get(...);
    ...
    if (...) {
    ...
    }
    ...
    if (...) {
       ...
       goto l;
    }
    ...
*   l: ... when != ida_simple_remove(...);

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 21:54:10 -04:00
Wei Yongjun
0fd7d43fbc net: qcom/emac: fix return value check in emac_sgmii_config()
In case of error, the function ioremap() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check
should be replaced with NULL test.

Also add check for return value of platform_get_resource().

Fixes: 54e19bc74f ("net: qcom/emac: do not use devm on internal
phy pdev")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 21:53:03 -04:00
Shmulik Ladkani
b6a7920848 net: skbuff: Limit skb_vlan_pop/push() to expect skb->data at mac header
skb_vlan_pop/push were too generic, trying to support the cases where
skb->data is at mac header, and cases where skb->data is arbitrarily
elsewhere.

Supporting an arbitrary skb->data was complex and bogus:
 - It failed to unwind skb->data to its original location post actual
   pop/push.
   (Also, semantic is not well defined for unwinding: If data was into
    the eth header, need to use same offset from start; But if data was
    at network header or beyond, need to adjust the original offset
    according to the push/pull)
 - It mangled the rcsum post actual push/pop, without taking into account
   that the eth bytes might already have been pulled out of the csum.

Most callers (ovs, bpf) already had their skb->data at mac_header upon
invoking skb_vlan_pop/push.
Last caller that failed to do so (act_vlan) has been recently fixed.

Therefore, to simplify things, no longer support arbitrary skb->data
inputs for skb_vlan_pop/push().

skb->data is expected to be exactly at mac_header; WARN otherwise.

Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Pravin Shelar <pshelar@ovn.org>
Cc: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 21:41:40 -04:00
Shmulik Ladkani
f39acc84aa net/sched: act_vlan: Push skb->data to mac_header prior calling skb_vlan_*() functions
Generic skb_vlan_push/skb_vlan_pop functions don't properly handle the
case where the input skb data pointer does not point at the mac header:

- They're doing push/pop, but fail to properly unwind data back to its
  original location.
  For example, in the skb_vlan_push case, any subsequent
  'skb_push(skb, skb->mac_len)' calls make the skb->data point 4 bytes
  BEFORE start of frame, leading to bogus frames that may be transmitted.

- They update rcsum per the added/removed 4 bytes tag.
  Alas if data is originally after the vlan/eth headers, then these
  bytes were already pulled out of the csum.

OTOH calling skb_vlan_push/skb_vlan_pop with skb->data at mac_header
present no issues.

act_vlan is the only caller to skb_vlan_*() that has skb->data pointing
at network header (upon ingress).
Other calles (ovs, bpf) already adjust skb->data at mac_header.

This patch fixes act_vlan to point to the mac_header prior calling
skb_vlan_*() functions, as other callers do.

Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Pravin Shelar <pshelar@ovn.org>
Cc: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-03 21:40:50 -04:00
Linus Torvalds
5e1b834b27 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
 "A rather smalish set of updates for timers and timekeeping:

   - Two core fixes to prevent potential undefinded behaviour about
     which gcc is complaining rightfully.

   - A fix to prevent stopping the tick on an (soon) offline CPU so it
     can complete the shutdown procedure.

   - Wait for clocks to stabilize before making decisions, so a not yet
     validated clock is not rejected.

   - The usual pile of fixes to the various clocksource drivers.

   - Core code typo and include fixlets"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timekeeping: Include the correct header for errno definitions
  clocksource/drivers/ti-32k: Prevent ftrace recursion
  clocksource/mips-gic-timer: Stop checking cpu_has_counter
  clocksource/mips-gic-timer: Print an error if IRQ setup fails
  tick/nohz: Prevent stopping the tick on an offline CPU
  clocksource/drivers/oxnas: Add OX820 compatible
  clocksource/drivers/timer-atmel-pit: Simplify IRQ handler
  clocksource/drivers/timer-atmel-pit: Remove uselesss WARN_ON_ONCE
  clocksource/drivers/timer-atmel-pit: Drop at91sam926x_pit_common_init
  clocksource/drivers/moxart: Replace panic by pr_err
  clocksource/drivers/moxart: Replace setup_irq by request_irq
  clocksource/drivers/moxart: Add Aspeed support
  clocksource/drivers/moxart: Use struct to hold state
  clocksource/drivers/moxart: Refactor enable/disable
  time: Avoid undefined behaviour in ktime_add_safe()
  time: Avoid undefined behaviour in timespec64_add_safe()
  timekeeping: Prints the amounts of time spent during suspend
  clocksource: Defer override invalidation unless clock is unstable
  hrtimer: Spelling fixes
2016-10-03 18:09:13 -07:00
Linus Torvalds
49deffe0b0 ARC changes for 4.9-rc1
- ARCv2 support for native 64-bit atomics using LLOCK/SCONDD instructions
  - Support for upcoming 3.0 release of HS38 cores
  - Dwarf unwindinder improvements
    - Ebaling unwinding out of hand written assembler code using CFI pseudo-ops
    - switching to .eh_frame (as opposed to historic .debug_frame)
    - getting rid of bunch of adhoc band-aids in the process
  - Miscll fixes
    - perf supporting generic cache-referecnes and cache-misses (Alexey)
    - default NODE_SHIFT (Noam Camus)
    - usage of KFLAG instruction to set IE (Yuriy)
  - Platforms
    - Adding "model" proprty across the DT (Alexey)
    - Enabling MODULE_* in defconfigs
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Merge tag 'arc-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC updates from Vineet Gupta:

 - ARCv2 support for native 64-bit atomics using LLOCK/SCONDD
   instructions

 - Support for upcoming 3.0 release of HS38 cores

 - Dwarf unwindinder improvements:
   - enable unwinding of hand written assembler code using CFI
     pseudo-ops
   - switch to .eh_frame (as opposed to historic .debug_frame)
   - get rid of a bunch of adhoc band-aids in the process

 - Misc fixes:
   - perf supporting generic cache-references and cache-misses (Alexey)
   - default NODE_SHIFT (Noam Camus)
   - usage of KFLAG instruction to set IE (Yuriy)

 - Platforms:
   - Add "model" property across the DT (Alexey)
   - Enable MODULE_* in defconfigs

* tag 'arc-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: [plat*] enables MODULE*
  ARCv2: fix local_save_flags
  ARC: CONFIG_NODES_SHIFT fix default values
  ARCv2: intc: Use kflag if STATUS32.IE must be reset
  ARC: .exit.* sections can be discarded in .eh_frame regime
  ARC: dw2 unwind: enable cfi pseudo ops in string lib
  ARC: dw2 unwind: add infrastructure for adding cfi pseudo ops to asm
  ARC: entry: make ret_from_system_call local label
  ARC: dw2 unwind: don't force dwarf 2
  ARC: dw2 unwind: switch to .eh_frame based unwinding
  ARC: dw2 unwind: factor CIE specifics for .eh_frame/.debug_frame
  ARC: module: support R_ARC_32_PCREL relocation
  arc: perf: Enable generic "cache-references" and "cache-misses" events
  ARC: [plat-eznps] add missing atomic_fetch_xxx operations
  ARCv2: Implement atomic64 based on LLOCKD/SCONDD instructions
  ARCv2: Support dynamic peripheral address space in HS38 rel 3.0 cores
  ARCv2: identify HS38 rel 3.0 cores
  ARCv2: Add support for ZeBu Emulation platform for HS cores
  arc: Add "model" properly in device tree description of all boards
2016-10-03 18:02:47 -07:00
Linus Torvalds
5419e78382 m68k updates for 4.8
- Cleanups,
   - Defconfig updates,
   - GPG fingerprint update.
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Merge tag 'm68k-for-v4.9-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k

Pull m68k updates from Geert Uytterhoeven:
 - cleanups
 - defconfig updates
 - GPG fingerprint update

* tag 'm68k-for-v4.9-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k: Migrate exception table users off module.h and onto extable.h
  CREDITS: Update fingerprint for Geert Uytterhoeven
  m68k: Use IS_ENABLED() instead of checking for built-in or module
  m68k/defconfig: Update defconfigs for v4.8-rc1
2016-10-03 17:59:24 -07:00
Linus Torvalds
8e4ef63867 Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 vdso updates from Ingo Molnar:
 "The main changes in this cycle centered around adding support for
  32-bit compatible C/R of the vDSO on 64-bit kernels, by Dmitry
  Safonov"

* 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/vdso: Use CONFIG_X86_X32_ABI to enable vdso prctl
  x86/vdso: Only define map_vdso_randomized() if CONFIG_X86_64
  x86/vdso: Only define prctl_map_vdso() if CONFIG_CHECKPOINT_RESTORE
  x86/signal: Add SA_{X32,IA32}_ABI sa_flags
  x86/ptrace: Down with test_thread_flag(TIF_IA32)
  x86/coredump: Use pr_reg size, rather that TIF_IA32 flag
  x86/arch_prctl/vdso: Add ARCH_MAP_VDSO_*
  x86/vdso: Replace calculate_addr in map_vdso() with addr
  x86/vdso: Unmap vdso blob on vvar mapping failure
2016-10-03 17:29:01 -07:00
Linus Torvalds
6aebe7f9e8 Merge branch 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 timer updates from Ingo Molnar:
 "This tree includes a HPET overhead micro-optimization plus new TSC
  frequencies for newer Intel CPUs"

* 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/tsc: Add additional Intel CPU models to the crystal quirk list
  x86/tsc: Use cpu id defines instead of hex constants
  x86/hpet: Reduce HPET counter read contention
2016-10-03 17:27:17 -07:00
Linus Torvalds
a6c4e4cd44 Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform changes from Ingo Molnar:
 "The main changes in this cycle were:

   - SGI UV updates (Andrew Banman)

   - Intel MID updates (Andy Shevchenko)

   - Initial Mellanox systems platform (Vadim Pasternak)"

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/platform/mellanox: Fix return value check in mlxplat_init()
  x86/platform/mellanox: Introduce support for Mellanox systems platform
  x86/platform/uv/BAU: Add UV4-specific functions
  x86/platform/uv/BAU: Fix payload queue setup on UV4 hardware
  x86/platform/uv/BAU: Disable software timeout on UV4 hardware
  x86/platform/uv/BAU: Populate ->uvhub_version with UV4 version information
  x86/platform/uv/BAU: Use generic function pointers
  x86/platform/uv/BAU: Add generic function pointers
  x86/platform/uv/BAU: Convert uv_physnodeaddr() use to uv_gpa_to_offset()
  x86/platform/uv/BAU: Clean up pq_init()
  x86/platform/uv/BAU: Clean up and update printks
  x86/platform/uv/BAU: Clean up vertical alignment
  x86/platform/intel-mid: Keep SRAM powered on at boot
  x86/platform/intel-mid: Add Intel Penwell to ID table
  x86/cpu: Rename Merrifield2 to Moorefield
  x86/platform/intel-mid: Implement power off sequence
  x86/platform/intel-mid: Enable SD card detection on Merrifield
  x86/platform/intel-mid: Enable WiFi on Intel Edison
  x86/platform/intel-mid: Run PWRMU command immediately
2016-10-03 17:22:25 -07:00
Linus Torvalds
a8adc0f091 Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cleanups from Ingo Molnar:
 "Header file and a wrapper functions cleanup"

* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Migrate exception table users off module.h and onto extable.h
  x86: Clean up various simple wrapper functions
2016-10-03 17:18:52 -07:00
Linus Torvalds
3ef0a61a46 Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 boot updates from Ingo Molnar:
 "The changes in this cycle were:

   - Save e820 table RAM footprint on larger kernel configurations.
     (Denys Vlasenko)

   - pmem related fixes (Dan Williams)

   - theoretical e820 boundary condition fix (Wei Yang)"

* 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Fix kdump, cleanup aborted E820_PRAM max_pfn manipulation
  x86/e820: Use much less memory for e820/e820_saved, save up to 120k
  x86/e820: Prepare e280 code for switch to dynamic storage
  x86/e820: Mark some static functions __init
  x86/e820: Fix very large 'size' handling boundary condition
2016-10-03 16:46:53 -07:00
Linus Torvalds
1a4a2bc460 Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull low-level x86 updates from Ingo Molnar:
 "In this cycle this topic tree has become one of those 'super topics'
  that accumulated a lot of changes:

   - Add CONFIG_VMAP_STACK=y support to the core kernel and enable it on
     x86 - preceded by an array of changes. v4.8 saw preparatory changes
     in this area already - this is the rest of the work. Includes the
     thread stack caching performance optimization. (Andy Lutomirski)

   - switch_to() cleanups and all around enhancements. (Brian Gerst)

   - A large number of dumpstack infrastructure enhancements and an
     unwinder abstraction. The secret long term plan is safe(r) live
     patching plus maybe another attempt at debuginfo based unwinding -
     but all these current bits are standalone enhancements in a frame
     pointer based debug environment as well. (Josh Poimboeuf)

   - More __ro_after_init and const annotations. (Kees Cook)

   - Enable KASLR for the vmemmap memory region. (Thomas Garnier)"

[ The virtually mapped stack changes are pretty fundamental, and not
  x86-specific per se, even if they are only used on x86 right now. ]

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits)
  x86/asm: Get rid of __read_cr4_safe()
  thread_info: Use unsigned long for flags
  x86/alternatives: Add stack frame dependency to alternative_call_2()
  x86/dumpstack: Fix show_stack() task pointer regression
  x86/dumpstack: Remove dump_trace() and related callbacks
  x86/dumpstack: Convert show_trace_log_lvl() to use the new unwinder
  oprofile/x86: Convert x86_backtrace() to use the new unwinder
  x86/stacktrace: Convert save_stack_trace_*() to use the new unwinder
  perf/x86: Convert perf_callchain_kernel() to use the new unwinder
  x86/unwind: Add new unwind interface and implementations
  x86/dumpstack: Remove NULL task pointer convention
  fork: Optimize task creation by caching two thread stacks per CPU if CONFIG_VMAP_STACK=y
  sched/core: Free the stack early if CONFIG_THREAD_INFO_IN_TASK
  lib/syscall: Pin the task stack in collect_syscall()
  x86/process: Pin the target stack in get_wchan()
  x86/dumpstack: Pin the target stack when dumping it
  kthread: Pin the stack via try_get_task_stack()/put_task_stack() in to_live_kthread() function
  sched/core: Add try_get_task_stack() and put_task_stack()
  x86/entry/64: Fix a minor comment rebase error
  iommu/amd: Don't put completion-wait semaphore on stack
  ...
2016-10-03 16:13:28 -07:00
John Crispin
6bcf3f6339 pinctrl: qcom: fix masking of pinmux functions
The following commit introduced a regression by not properly masking the
calculated value.

Fixes: 47a01ee9a6 ("pinctrl: qcom: Clear all function selection bits")
Signed-off-by: John Crispin <john@phrozen.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-10-04 00:36:20 +02:00
Linus Torvalds
110a9e42b6 Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 apic updates from Ingo Molnar:
 "The main changes are:

   - Persistent CPU/node numbering across CPU hotplug/unplug events.
     This is a pretty involved series of changes that first fetches all
     the information during bootup and then uses it for the various
     hotplug/unplug methods. (Gu Zheng, Dou Liyang)

   - IO-APIC hot-add/remove fixes and enhancements. (Rui Wang)

   - ... various fixes, cleanups and enhancements"

* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
  x86/apic: Fix silent & fatal merge conflict in __generic_processor_info()
  acpi: Fix broken error check in map_processor()
  acpi: Validate processor id when mapping the processor
  acpi: Provide mechanism to validate processors in the ACPI tables
  x86/acpi: Set persistent cpuid <-> nodeid mapping when booting
  x86/acpi: Enable MADT APIs to return disabled apicids
  x86/acpi: Introduce persistent storage for cpuid <-> apicid mapping
  x86/acpi: Enable acpi to register all possible cpus at boot time
  x86/numa: Online memory-less nodes at boot time
  x86/apic: Get rid of apic_version[] array
  x86/apic: Order irq_enter/exit() calls correctly vs. ack_APIC_irq()
  x86/ioapic: Ignore root bridges without a companion ACPI device
  x86/apic: Update comment about disabling processor focus
  x86/smpboot: Check APIC ID before setting up default routing
  x86/ioapic: Fix IOAPIC failing to request resource
  x86/ioapic: Fix lost IOAPIC resource after hot-removal and hotadd
  x86/ioapic: Fix setup_res() failing to get resource
  x86/ioapic: Support hot-removal of IOAPICs present during boot
  x86/ioapic: Change prototype of acpi_ioapic_add()
  x86/apic, ACPI: Fix incorrect assignment when handling apic/x2apic entries
  ...
2016-10-03 15:36:06 -07:00
Linus Walleij
e085294066 gpio: add missing static inline
of_get_named_gpiod_flags() was missing a static inline version
when compiling without OF_GPIO. Add this.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-10-03 23:38:11 +02:00
Linus Walleij
f4c1181f0f gpio: OF: localize some gpiochip init functions
of_gpiochip_add() and of_gpiochip_remove() are only used locally
in the gpio subsystem so move these functions to the local
header.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-10-03 23:38:11 +02:00
Linus Walleij
031ba28a81 gpio: acpi: separation of concerns
The generic GPIO library directly implement code for acpi_find_gpio()
which is only used with CONFIG_ACPI. This was probably done because
OF did the same thing, but I removed that so remove this too.

Rename the internal acpi_find_gpio() in gpiolib-acpi.c to
acpi_populate_gpio_lookup() which seems to be more appropriate anyway
so as to avoid a namespace clash with the same function.

Make the stub return -ENOENT rather than -ENOSYS (as that is for
syscalls!).

For some reason the sunxi pin control driver was including the private
gpiolib header, it works just fine without it so remove that oneliner.

Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2016-10-03 23:38:10 +02:00
Linus Torvalds
af79ad2b1f Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler changes from Ingo Molnar:
 "The main changes are:

   - irqtime accounting cleanups and enhancements. (Frederic Weisbecker)

   - schedstat debugging enhancements, make it more broadly runtime
     available. (Josh Poimboeuf)

   - More work on asymmetric topology/capacity scheduling. (Morten
     Rasmussen)

   - sched/wait fixes and cleanups. (Oleg Nesterov)

   - PELT (per entity load tracking) improvements. (Peter Zijlstra)

   - Rewrite and enhance select_idle_siblings(). (Peter Zijlstra)

   - sched/numa enhancements/fixes (Rik van Riel)

   - sched/cputime scalability improvements (Stanislaw Gruszka)

   - Load calculation arithmetics fixes. (Dietmar Eggemann)

   - sched/deadline enhancements (Tommaso Cucinotta)

   - Fix utilization accounting when switching to the SCHED_NORMAL
     policy. (Vincent Guittot)

   - ... plus misc cleanups and enhancements"

* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (64 commits)
  sched/irqtime: Consolidate irqtime flushing code
  sched/irqtime: Consolidate accounting synchronization with u64_stats API
  u64_stats: Introduce IRQs disabled helpers
  sched/irqtime: Remove needless IRQs disablement on kcpustat update
  sched/irqtime: No need for preempt-safe accessors
  sched/fair: Fix min_vruntime tracking
  sched/debug: Add SCHED_WARN_ON()
  sched/core: Fix set_user_nice()
  sched/fair: Introduce set_curr_task() helper
  sched/core, ia64: Rename set_curr_task()
  sched/core: Fix incorrect utilization accounting when switching to fair class
  sched/core: Optimize SCHED_SMT
  sched/core: Rewrite and improve select_idle_siblings()
  sched/core: Replace sd_busy/nr_busy_cpus with sched_domain_shared
  sched/core: Introduce 'struct sched_domain_shared'
  sched/core: Restructure destroy_sched_domain()
  sched/core: Remove unused @cpu argument from destroy_sched_domain*()
  sched/wait: Introduce init_wait_entry()
  sched/wait: Avoid abort_exclusive_wait() in __wait_on_bit_lock()
  sched/wait: Avoid abort_exclusive_wait() in ___wait_event()
  ...
2016-10-03 13:39:00 -07:00
Linus Torvalds
e606d81d2d Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RAS updates from Ingo Molnar:
 "The main changes were:

   - Lots of enhancements for AMD SMCA (Scalable MCA
     features/extensions) systems: extract, decode and print more
     hardware error information and add matching support on the
     injection/testing side as well. (Yazn Ghannam)

   - Various MCE handling improvements on modern Intel Xeons. (Tony
     Luck)

   - Plus misc fixes and enhancements"

* 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
  x86/RAS/mce_amd_inj: Remove debugfs dir recursively on exit
  x86/RAS/mce_amd_inj: Fix signed wrap around when decrementing index 'i'
  x86/RAS/mce_amd_inj: Fix some W= warnings
  x86/MCE/AMD, EDAC: Handle reserved bank 4 on Fam17h properly
  x86/mce/AMD: Extract the error address on SMCA systems
  x86/mce, EDAC/mce_amd: Print MCA_SYND and MCA_IPID during MCE on SMCA systems
  x86/mce/AMD: Save MCA_IPID in MCE struct on SMCA systems
  x86/mce/AMD: Ensure the deferred error interrupt is of type APIC on SMCA systems
  x86/mce/AMD: Update sysfs bank names for SMCA systems
  x86/mce/AMD, EDAC/mce_amd: Define and use tables for known SMCA IP types
  EDAC/mce_amd: Use SMCA prefix for error descriptions arrays
  EDAC/mce_amd: Add missing SMCA error descriptions
  x86/mce/AMD: Read MSRs on the CPU allocating the threshold blocks
  x86/RAS: Add syndrome support to mce_amd_inj
  EDAC/mce_amd: Print syndrome register value on SMCA systems
  x86/mce: Add support for new MCA_SYND register
  x86/mce/AMD: Use msr_ops.misc() in allocate_threshold_blocks()
  x86/mce: Drop X86_FEATURE_MCE_RECOVERY and the related model string test
  x86/mce: Improve memcpy_mcsafe()
  x86/mce: Add PCI quirks to identify Xeons with machine check recovery
  ...
2016-10-03 13:22:39 -07:00
Linus Torvalds
12b7bcb43e Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
 "The main kernel side changes were:

   - uprobes enhancements (Masami Hiramatsu)

   - Uncore group events enhancements (David Carrillo-Cisneros)

   - x86 Intel: Add support for Skylake server uncore PMUs (Kan Liang)

   - x86 Intel: LBR cleanups and enhancements, for better branch
     annotation tracking (Peter Zijlstra)

   - x86 Intel: Add support for PTWRITE and power event tracing
     (Alexander Shishkin)

   - ... various fixes, cleanups and smaller enhancements.

  Lots of tooling changes - a couple of highlights:

   - Support event group view with hierarchy mode in 'perf top' and
     'perf report' (Namhyung Kim)

     e.g.:

     $ perf record -e '{cycles,instructions}' make
     $ perf report --hierarchy --stdio
     ...
     #   Overhead  Command / Shared Object / Symbol
     # ......................  ..................................
     ...
     25.74%  27.18%sh
     19.96%  24.14%libc-2.24.so
      9.55%  14.64%[.] __strcmp_sse2
      1.54%   0.00%[.] __tfind
      1.07%   1.13%[.] _int_malloc
      0.95%   0.00%[.] __strchr_sse2
      0.89%   1.39%[.] __tsearch
      0.76%   0.00%[.] strlen

   - Add branch stack / basic block info to 'perf annotate --stdio',
     where for each branch, we add an asm comment after the instruction
     with information on how often it was taken and predicted. See
     example with color output at:

       http://vger.kernel.org/~acme/perf/annotate_basic_blocks.png

     (Peter Zijlstra)

   - Add support for using symbols in address filters with Intel PT and
     ARM CoreSight (hardware assisted tracing facilities) (Adrian
     Hunter, Mathieu Poirier)

   - Add support for interacting with Coresight PMU ETMs/PTMs, that are
     IP blocks to perform hardware assisted tracing on a ARM CPU core
     (Mathieu Poirier)

   - Support generating cross arch probes, i.e. if you specify a vmlinux
     file for different arch than the one in the host machine,

        $ perf probe --definition function_name args

     will generate the probe definition string needed to append to the
     target machine /sys/kernel/debug/tracing/kprobes_events file, using
     scripting (Masami Hiramatsu).

   - Allow configuring the default 'perf report -s' sort order in
     ~/.perfconfig, for instance, "sym,dso" may be more fitting for
     kernel developers. (Arnaldo Carvalho de Melo)

   - ... plus lots of other changes, refactorings, features and fixes"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (149 commits)
  perf tests: Add dwarf unwind test for powerpc
  perf probe: Match linkage name with mangled name
  perf probe: Fix to cut off incompatible chars from group name
  perf probe: Skip if the function address is 0
  perf probe: Ignore the error of finding inline instance
  perf intel-pt: Fix decoding when there are address filters
  perf intel-pt: Enable decoder to handle TIP.PGD with missing IP
  perf intel-pt: Read address filter from AUXTRACE_INFO event
  perf intel-pt: Record address filter in AUXTRACE_INFO event
  perf intel-pt: Add a helper function for processing AUXTRACE_INFO
  perf intel-pt: Fix missing error codes processing auxtrace_info
  perf intel-pt: Add support for recording the max non-turbo ratio
  perf intel-pt: Fix snapshot overlap detection decoder errors
  perf probe: Increase debug level of SDT debug messages
  perf record: Add support for using symbols in address filters
  perf symbols: Add dso__last_symbol()
  perf record: Fix error paths
  perf record: Rename label 'out_symbol_exit'
  perf script: Fix vanished idle symbols
  perf evsel: Add support for address filters
  ...
2016-10-03 12:47:28 -07:00
Linus Torvalds
00bcf5cdd6 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
 "The main changes in this cycle were:

   - rwsem micro-optimizations (Davidlohr Bueso)

   - Improve the implementation and optimize the performance of
     percpu-rwsems. (Peter Zijlstra.)

   - Convert all lglock users to better facilities such as percpu-rwsems
     or percpu-spinlocks and remove lglocks. (Peter Zijlstra)

   - Remove the ticket (spin)lock implementation. (Peter Zijlstra)

   - Korean translation of memory-barriers.txt and related fixes to the
     English document. (SeongJae Park)

   - misc fixes and cleanups"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
  x86/cmpxchg, locking/atomics: Remove superfluous definitions
  x86, locking/spinlocks: Remove ticket (spin)lock implementation
  locking/lglock: Remove lglock implementation
  stop_machine: Remove stop_cpus_lock and lg_double_lock/unlock()
  fs/locks: Use percpu_down_read_preempt_disable()
  locking/percpu-rwsem: Add down_read_preempt_disable()
  fs/locks: Replace lg_local with a per-cpu spinlock
  fs/locks: Replace lg_global with a percpu-rwsem
  locking/percpu-rwsem: Add DEFINE_STATIC_PERCPU_RWSEMand percpu_rwsem_assert_held()
  locking/pv-qspinlock: Use cmpxchg_release() in __pv_queued_spin_unlock()
  locking/rwsem, x86: Drop a bogus cc clobber
  futex: Add some more function commentry
  locking/hung_task: Show all locks
  locking/rwsem: Scan the wait_list for readers only once
  locking/rwsem: Remove a few useless comments
  locking/rwsem: Return void in __rwsem_mark_wake()
  locking, rcu, cgroup: Avoid synchronize_sched() in __cgroup_procs_write()
  locking/Documentation: Add Korean translation
  locking/Documentation: Fix a typo of example result
  locking/Documentation: Fix wrong section reference
  ...
2016-10-03 12:15:00 -07:00
Linus Torvalds
de956b8f45 Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI updates from Ingo Molnar:
 "Main changes in this cycle were:

   - Refactor the EFI memory map code into architecture neutral files
     and allow drivers to permanently reserve EFI boot services regions
     on x86, as well as ARM/arm64. (Matt Fleming)

   - Add ARM support for the EFI ESRT driver. (Ard Biesheuvel)

   - Make the EFI runtime services and efivar API interruptible by
     swapping spinlocks for semaphores. (Sylvain Chouleur)

   - Provide the EFI identity mapping for kexec which allows kexec to
     work on SGI/UV platforms with requiring the "noefi" kernel command
     line parameter. (Alex Thorlton)

   - Add debugfs node to dump EFI page tables on arm64. (Ard Biesheuvel)

   - Merge the EFI test driver being carried out of tree until now in
     the FWTS project. (Ivan Hu)

   - Expand the list of flags for classifying EFI regions as "RAM" on
     arm64 so we align with the UEFI spec. (Ard Biesheuvel)

   - Optimise out the EFI mixed mode if it's unsupported (CONFIG_X86_32)
     or disabled (CONFIG_EFI_MIXED=n) and switch the early EFI boot
     services function table for direct calls, alleviating us from
     having to maintain the custom function table. (Lukas Wunner)

   - Miscellaneous cleanups and fixes"

* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (30 commits)
  x86/efi: Round EFI memmap reservations to EFI_PAGE_SIZE
  x86/efi: Allow invocation of arbitrary boot services
  x86/efi: Optimize away setup_gop32/64 if unused
  x86/efi: Use kmalloc_array() in efi_call_phys_prolog()
  efi/arm64: Treat regions with WT/WC set but WB cleared as memory
  efi: Add efi_test driver for exporting UEFI runtime service interfaces
  x86/efi: Defer efi_esrt_init until after memblock_x86_fill
  efi/arm64: Add debugfs node to dump UEFI runtime page tables
  x86/efi: Remove unused find_bits() function
  fs/efivarfs: Fix double kfree() in error path
  x86/efi: Map in physical addresses in efi_map_region_fixed
  lib/ucs2_string: Speed up ucs2_utf8size()
  firmware-gsmi: Delete an unnecessary check before the function call "dma_pool_destroy"
  x86/efi: Initialize status to ensure garbage is not returned on small size
  efi: Replace runtime services spinlock with semaphore
  efi: Don't use spinlocks for efi vars
  efi: Use a file local lock for efivars
  efi/arm*: esrt: Add missing call to efi_esrt_init()
  efi/esrt: Use memremap not ioremap to access ESRT table in memory
  x86/efi-bgrt: Use efi_mem_reserve() to avoid copying image data
  ...
2016-10-03 11:33:18 -07:00
Linus Torvalds
d7a0dab82f Merge branch 'core-smp-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core SMP updates from Ingo Molnar:
 "Two main change is generic vCPU pinning and physical CPU SMP-call
  support, for Xen to be able to perform certain calls on specific
  physical CPUs - by Juergen Gross"

* 'core-smp-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  smp: Allocate smp_call_on_cpu() workqueue on stack too
  hwmon: Use smp_call_on_cpu() for dell-smm i8k
  dcdbas: Make use of smp_call_on_cpu()
  xen: Add xen_pin_vcpu() to support calling functions on a dedicated pCPU
  smp: Add function to execute a function synchronously on a CPU
  virt, sched: Add generic vCPU pinning support
  xen: Sync xen header
2016-10-03 11:02:39 -07:00
Linus Torvalds
4b978934a4 Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Expedited grace-period changes, most notably avoiding having user
     threads drive expedited grace periods, using a workqueue instead.

   - Miscellaneous fixes, including a performance fix for lists that was
     sent with the lists modifications.

   - CPU hotplug updates, most notably providing exact CPU-online
     tracking for RCU. This will in turn allow removal of the checks
     supporting RCU's prior heuristic that was based on the assumption
     that CPUs would take no longer than one jiffy to come online.

   - Torture-test updates.

   - Documentation updates"

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
  list: Expand list_first_entry_or_null()
  torture: TOROUT_STRING(): Insert a space between flag and message
  rcuperf: Consistently insert space between flag and message
  rcutorture: Print out barrier error as document says
  torture: Add task state to writer-task stall printk()s
  torture: Convert torture_shutdown() to hrtimer
  rcutorture: Convert to hotplug state machine
  cpu/hotplug: Get rid of CPU_STARTING reference
  rcu: Provide exact CPU-online tracking for RCU
  rcu: Avoid redundant quiescent-state chasing
  rcu: Don't use modular infrastructure in non-modular code
  sched: Make wake_up_nohz_cpu() handle CPUs going offline
  rcu: Use rcu_gp_kthread_wake() to wake up grace period kthreads
  rcu: Use RCU's online-CPU state for expedited IPI retry
  rcu: Exclude RCU-offline CPUs from expedited grace periods
  rcu: Make expedited RCU CPU stall warnings respond to controls
  rcu: Stop disabling expedited RCU CPU stall warnings
  rcu: Drive expedited grace periods from workqueue
  rcu: Consolidate expedited grace period machinery
  documentation: Record reason for rcu_head two-byte alignment
  ...
2016-10-03 10:29:53 -07:00