Commit Graph

571266 Commits

Author SHA1 Message Date
Marcelo Ricardo Leitner 27f7ed2b11 sctp: allow setting SCTP_SACK_IMMEDIATELY by the application
This patch extends commit b93d647174 ("sctp: implement the sender side
for SACK-IMMEDIATELY extension") as it didn't white list
SCTP_SACK_IMMEDIATELY on sctp_msghdr_parse(), causing it to be
understood as an invalid flag and returning -EINVAL to the application.

Note that the actual handling of the flag is already there in
sctp_datamsg_from_user().

https://tools.ietf.org/html/rfc7053#section-7

Fixes: b93d647174 ("sctp: implement the sender side for SACK-IMMEDIATELY extension")
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-24 22:43:21 -08:00
Arnd Bergmann facc432faa net: simplify napi_synchronize() to avoid warnings
The napi_synchronize() function is defined twice: The definition
for SMP builds waits for other CPUs to be done, while the uniprocessor
variant just contains a barrier and ignores its argument.

In the mvneta driver, this leads to a warning about an unused variable
when we lookup the NAPI struct of another CPU and then don't use it:

ethernet/marvell/mvneta.c: In function 'mvneta_percpu_notifier':
ethernet/marvell/mvneta.c:2910:30: error: unused variable 'other_port' [-Werror=unused-variable]

There are no other CPUs on a UP build, so that code never runs, but
gcc does not know this.

The nicest solution seems to be to turn the napi_synchronize() helper
into an inline function for the UP case as well, as that leads gcc to
not complain about the argument being unused. Once we do that, we can
also combine the two cases into a single function definition and use
if(IS_ENABLED()) rather than #ifdef to make it look a bit nicer.

The warning first came up in linux-4.4, but I failed to catch it
earlier.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: f864288544 ("net: mvneta: Statically assign queues to CPUs")
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-24 22:19:55 -08:00
Hannes Frederic Sowa 9a368aff9c pptp: fix illegal memory access caused by multiple bind()s
Several times already this has been reported as kasan reports caused by
syzkaller and trinity and people always looked at RCU races, but it is
much more simple. :)

In case we bind a pptp socket multiple times, we simply add it to
the callid_sock list but don't remove the old binding. Thus the old
socket stays in the bucket with unused call_id indexes and doesn't get
cleaned up. This causes various forms of kasan reports which were hard
to pinpoint.

Simply don't allow multiple binds and correct error handling in
pptp_bind. Also keep sk_state bits in place in pptp_connect.

Fixes: 00959ade36 ("PPTP: PPP over IPv4 (Point-to-Point Tunneling Protocol)")
Cc: Dmitry Kozlov <xeb@mail.ru>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Dave Jones <davej@codemonkey.org.uk>
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-24 22:18:26 -08:00
Iyappan Subramanian b5d7a06906 drivers: net: xgene: fix extra IRQ issue
For interrupt controller that doesn't support irq_disable and hardware
with level interrupt, an extra interrupt may be pending. This patch fixes
the issue by setting IRQ_DISABLE_UNLAZY flag for the interrupt line,
as suggested by,

'commit e9849777d0 ("genirq: Add flag to force mask in
		       disable_irq[_nosync]()")'

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Tested-by: Toan Le <toanle@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-24 22:15:56 -08:00
Eric Dumazet fa0dc04df2 af_unix: fix struct pid memory leak
Dmitry reported a struct pid leak detected by a syzkaller program.

Bug happens in unix_stream_recvmsg() when we break the loop when a
signal is pending, without properly releasing scm.

Fixes: b3ca9b02b0 ("net: fix multithreaded signal handling in unix recv routines")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Rainer Weikusat <rweikusat@mobileactivedefense.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-24 22:04:49 -08:00
Johannes Weiner 4877be9019 net: sock: remove dead cgroup methods from struct proto
The cgroup methods are no longer used after baac50bbc3 ("net:
tcp_memcontrol: simplify linkage between socket and page counter").
The hunk to delete them was included in the original patch but must
have gotten lost during conflict resolution on the way upstream.

Fixes: baac50bbc3 ("net: tcp_memcontrol: simplify linkage between socket and page counter")
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 14:16:51 -08:00
Teresa Remmet 0a9c453eef net: phy: smsc: Fix disabling energy detect mode
When the lan87xx_read_status function is getting called the
energy detect mode is enabled again even if it has been
disabled by device tree.

Added private struct to check the energy detect status.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 12:06:03 -08:00
David S. Miller 8e0c2ab262 Merge branch 'mvneta-multi-clk'
Jisheng Zhang says:

====================
net: mvneta: support more than one clk

Some platforms may provide more than one clk for the mvneta IP, for
example Marvell BG4CT provides "core" clk for the mac core, and "axi"
clk for the AXI bus logic.

This series tries to addess the "more than one clk" issue. Note: to
support BG4CT, we have lots of refactor work to do, eg. BG4CT doesn't
have mbus concept etc.

Since v2:
 - Name the optional clock as "bus", which is a bit more flexible.

Since v1:
 - Add Thomas Acks to patch1 and patch2.
 - make sure the headers are really sorted (some headers are still
   unsorted in v1).
 - disable axi clk before disabling core clk, Thank Thomas.
 - update dt binding as Thomas suggested.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 12:04:59 -08:00
Jisheng Zhang e308cb835c net: mvneta: update clocks property and document additional clock-names
Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 12:04:59 -08:00
Jisheng Zhang 15cc4a4a99 net: mvneta: get optional bus clk
Some platforms may provide more than one clk for the mvneta IP, for
example Marvell BG4CT provides one clk for the mac core, and one
clk for the AXI bus logic. Obviously this bus clk also need to
be enabled. This patch adds this optional "bus" clk support.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 12:04:59 -08:00
Jisheng Zhang 2804ba4ede net: mvneta: Try to get named core clock first
Some platforms may provide more than one clk for the mvneta IP, for
example Marvell BG4CT provides one clk for the mac core, and one
clk for the AXI bus logic.

To support for more than one clock, we'll need to distinguish between
the clock by name. Change clock probing to first try to get "core"
clock before falling back to unnamed clock.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 12:04:59 -08:00
Jisheng Zhang 0e03f563a0 net: mvneta: sort the headers in alphabetic order
Sorting the headers in alphabetic order will help to reduce the conflict
when adding new headers in the future.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 12:04:59 -08:00
Jisheng Zhang 2c832293e0 net: mvneta: fix trivial cut-off issue in mvneta_ethtool_update_stats
When s->type is T_REG_64, the high 32bits are lost in val. This patch
fixes this trivial issue.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Fixes: 9b0cdefa4c ("net: mvneta: add ethtool statistics")
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 12:03:30 -08:00
yankejian 48189d6aaf net: hns: enet specifies a reference to dsaf
This patch replace the assoication between dsaf and enet from string
matching to object reference. It requires the DTS to be updated within
BIOS. Thanks god it can be done for all released boards.

Signed-off-by: Kejian Yan <yankejian@huawei.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 12:02:31 -08:00
Eric Dumazet e62a123b8e tcp: fix NULL deref in tcp_v4_send_ack()
Neal reported crashes with this stack trace :

 RIP: 0010:[<ffffffff8c57231b>] tcp_v4_send_ack+0x41/0x20f
...
 CR2: 0000000000000018 CR3: 000000044005c000 CR4: 00000000001427e0
...
  [<ffffffff8c57258e>] tcp_v4_reqsk_send_ack+0xa5/0xb4
  [<ffffffff8c1a7caa>] tcp_check_req+0x2ea/0x3e0
  [<ffffffff8c19e420>] tcp_rcv_state_process+0x850/0x2500
  [<ffffffff8c1a6d21>] tcp_v4_do_rcv+0x141/0x330
  [<ffffffff8c56cdb2>] sk_backlog_rcv+0x21/0x30
  [<ffffffff8c098bbd>] tcp_recvmsg+0x75d/0xf90
  [<ffffffff8c0a8700>] inet_recvmsg+0x80/0xa0
  [<ffffffff8c17623e>] sock_aio_read+0xee/0x110
  [<ffffffff8c066fcf>] do_sync_read+0x6f/0xa0
  [<ffffffff8c0673a1>] SyS_read+0x1e1/0x290
  [<ffffffff8c5ca262>] system_call_fastpath+0x16/0x1b

The problem here is the skb we provide to tcp_v4_send_ack() had to
be parked in the backlog of a new TCP fastopen child because this child
was owned by the user at the time an out of window packet arrived.

Before queuing a packet, TCP has to set skb->dev to NULL as the device
could disappear before packet is removed from the queue.

Fix this issue by using the net pointer provided by the socket (being a
timewait or a request socket).

IPv6 is immune to the bug : tcp_v6_send_response() already gets the net
pointer from the socket if provided.

Fixes: 168a8f5805 ("tcp: TCP Fast Open Server - main code path")
Reported-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jerry Chu <hkchu@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 11:20:14 -08:00
Jesse Gross 35e2d1152b tunnels: Allow IPv6 UDP checksums to be correctly controlled.
When configuring checksums on UDP tunnels, the flags are different
for IPv4 vs. IPv6 (and reversed). However, when lightweight tunnels
are enabled the flags used are always the IPv4 versions, which are
ignored in the IPv6 code paths. This uses the correct IPv6 flags, so
checksums can be controlled appropriately.

Fixes: a725e514 ("vxlan: metadata based tunneling for IPv6")
Fixes: abe492b4 ("geneve: UDP checksum configuration via netlink")
Signed-off-by: Jesse Gross <jesse@kernel.org>
Acked-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 11:10:40 -08:00
David S. Miller 4f2aaf7dd9 Merge branch 'fix-phy-ignore-interrupts'
Florian Fainelli says:

====================
net: phy: Finally fix PHY_IGNORE_INTERRUPTS

This patch series finally fixes how PHY_IGNORE_INTERRUPTS are treated by
avoiding to poll the PHY *and* getting notified from link state changes by the
Ethernet MAC interrupt service routine.

Tested with bcmgenet since this is the HW that I have access to.

Targetting the "net" tree since these are bugfixes, but I would like Woojun and
Andrew to take a look and test that on their respective HW setups as well.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 10:48:51 -08:00
Florian Fainelli 49f7a471e4 net: bcmgenet: Properly configure PHY to ignore interrupt
By the time we execute bcmgenet_mii_probe(), the MDIO bus structure has
long been allocated and registered. Overirring the PHY interrupt using
the MDIO bus structure has no chance to work anymore, because
of_mdiobus_register() has call phy_device_create() for use, which copied
the MDIO bus address's irq for the PHY into the PHY device "irq" member.

Since we do have a proper reference to a PHY device in
bcmgenet_mii_probe(), just assign the desired IRQ value here.

Fixes: aa09677cba ("net: bcmgenet: add MDIO routines")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 10:48:51 -08:00
Florian Fainelli deccd16f91 net: phy: Fix phy_mac_interrupt()
Commit 5ea94e7686 ("phy: add phy_mac_interrupt()") to use with
PHY_IGNORE_INTERRUPT added a cancel_work_sync() into phy_mac_interrupt()
which is allowed to sleep, whereas phy_mac_interrupt() is expected to be
callable from interrupt context.

Now that we have fixed how the PHY state machine treats
PHY_IGNORE_INTERRUPT with respect to state changes, we can just set the
new link state, and queue the PHY state machine for execution so it is
going to read the new link state.

For that to work properly, we need to update phy_change() not to try to
invoke any interrupt callbacks if we have configured the PHY device for
PHY_IGNORE_INTERRUPT, because that PHY device and its driver are not
required to implement those.

Fixes: 5ea94e7686 ("phy: add phy_mac_interrupt() to use with PHY_IGNORE_INTERRUPT")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 10:48:51 -08:00
Florian Fainelli d5c3d84657 net: phy: Avoid polling PHY with PHY_IGNORE_INTERRUPTS
Commit 2c7b49212a ("phy: fix the use of PHY_IGNORE_INTERRUPT") changed
a hunk in phy_state_machine() in the PHY_RUNNING case which was not
needed. The change essentially makes the PHY library treat PHY devices
with PHY_IGNORE_INTERRUPT to keep polling for the PHY device, even
though the intent is not to do it.

Fix this by reverting that specific hunk, which makes the PHY state
machine wait for state changes, and stay in the PHY_RUNNING state for as
long as needed.

Fixes: 2c7b49212a ("phy: fix the use of PHY_IGNORE_INTERRUPT")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 10:48:51 -08:00
Sudip Mukherjee ceb6560a4c net/irda: bfin_sir: remove duplicate defines
The defconfig build of blackfin is failing with the error:

arch/blackfin/include/asm/bfin_serial.h:269:0: warning: "port_membase" redefined
drivers/net/irda/bfin_sir.h:85:0: note: this is the location of the previous definition
arch/blackfin/include/asm/bfin_serial.h:382:0: warning: "get_lsr_cache" redefined
drivers/net/irda/bfin_sir.h:86:0: note: this is the location of the previous definition
arch/blackfin/include/asm/bfin_serial.h:383:0: warning: "put_lsr_cache" redefined
drivers/net/irda/bfin_sir.h:87:0: note: this is the location of the previous definition

port_membase, get_lsr_cache, put_lsr_cache are already defined in the
architecture files, no need to define them again in the driver.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-21 10:45:45 -08:00
David S. Miller 8034e1efcb Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf 2016-01-20 18:56:44 -08:00
Xin Long bffae6975e net: change tcp_syn_retries documentation
Documentation should be kept consistent with the code:

 static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
 #define MAX_TCP_SYNCNT          127

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-20 18:55:08 -08:00
Manfred Rudigier 81e8f2e930 net: dp83640: Fix tx timestamp overflow handling.
PHY status frames are not reliable, the PHY may not be able to send them
during heavy receive traffic. This overflow condition is signaled by the
PHY in the next status frame, but the driver did not make use of it.
Instead it always reported wrong tx timestamps to user space after an
overflow happened because it assigned newly received tx timestamps to old
packets in the queue.

This commit fixes this issue by clearing the tx timestamp queue every time
an overflow happens, so that no timestamps are delivered for overflow
packets. This way time stamping will continue correctly after an overflow.

Signed-off-by: Manfred Rudigier <manfred.rudigier@omicron.at>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-20 18:54:08 -08:00
Eric Dumazet 7c1306723e net: diag: support v4mapped sockets in inet_diag_find_one_icsk()
Lorenzo reported that we could not properly find v4mapped sockets
in inet_diag_find_one_icsk(). This patch fixes the issue.

Reported-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-20 18:51:31 -08:00
Jesse Gross ce87fc6ce3 gro: Make GRO aware of lightweight tunnels.
GRO is currently not aware of tunnel metadata generated by lightweight
tunnels and stored in the dst. This leads to two possible problems:
 * Incorrectly merging two frames that have different metadata.
 * Leaking of allocated metadata from merged frames.

This avoids those problems by comparing the tunnel information before
merging, similar to how we handle other metadata (such as vlan tags),
and releasing any state when we are done.

Reported-by: John <john.phillips5@hpe.com>
Fixes: 2e15ea39 ("ip_gre: Add support to collect tunnel metadata.")
Signed-off-by: Jesse Gross <jesse@kernel.org>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-20 18:48:38 -08:00
Sasha Levin b16c29191d netfilter: nf_conntrack: use safer way to lock all buckets
When we need to lock all buckets in the connection hashtable we'd attempt to
lock 1024 spinlocks, which is way more preemption levels than supported by
the kernel. Furthermore, this behavior was hidden by checking if lockdep is
enabled, and if it was - use only 8 buckets(!).

Fix this by using a global lock and synchronize all buckets on it when we
need to lock them all. This is pretty heavyweight, but is only done when we
need to resize the hashtable, and that doesn't happen often enough (or at all).

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-01-20 14:15:31 +01:00
Sowmini Varadhan 5f2f3cad8b sunvnet: Initialize network_header and transport_header in vnet_rx_one()
vnet_fullcsum() accesses ip_hdr() and transport header to compute
the checksum for IPv4 packets, so these need to be initialized in
skb created in vnet_rx_one().

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-19 14:48:15 -05:00
Craig Gallek b4ace4f1ae soreuseport: fix NULL ptr dereference SO_REUSEPORT after bind
Marc Dionne discovered a NULL pointer dereference when setting
SO_REUSEPORT on a socket after it is bound.
This patch removes the assumption that at least one socket in the
reuseport group is bound with the SO_REUSEPORT option before other
bind calls occur.

Fixes: e32ea7e747 ("soreuseport: fast reuseport UDP socket selection")
Reported-by: Marc Dionne <marc.c.dionne@gmail.com>
Signed-off-by: Craig Gallek <kraig@google.com>
Tested-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-19 14:44:23 -05:00
Ursula Braun 52a82e23b9 af_iucv: Validate socket address length in iucv_sock_bind()
Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Evgeny Cherkashin <Eugene.Crosser@ru.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-19 14:21:08 -05:00
Eric Dumazet ed0dfffd7d udp: fix potential infinite loop in SO_REUSEPORT logic
Using a combination of connected and un-connected sockets, Dmitry
was able to trigger soft lockups with his fuzzer.

The problem is that sockets in the SO_REUSEPORT array might have
different scores.

Right after sk2=socket(), setsockopt(sk2,...,SO_REUSEPORT, on) and
bind(sk2, ...), but _before_ the connect(sk2) is done, sk2 is added into
the soreuseport array, with a score which is smaller than the score of
first socket sk1 found in hash table (I am speaking of the regular UDP
hash table), if sk1 had the connect() done, giving a +8 to its score.

hash bucket [X] -> sk1 -> sk2 -> NULL

sk1 score = 14  (because it did a connect())
sk2 score = 6

SO_REUSEPORT fast selection is an optimization. If it turns out the
score of the selected socket does not match score of first socket, just
fallback to old SO_REUSEPORT logic instead of trying to be too smart.

Normal SO_REUSEPORT users do not mix different kind of sockets, as this
mechanism is used for load balance traffic.

Fixes: e32ea7e747 ("soreuseport: fast reuseport UDP socket selection")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Craig Gallek <kraigatgoog@gmail.com>
Acked-by: Craig Gallek <kraig@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-19 13:52:25 -05:00
Linus Torvalds a200dcb346 virtio: barrier rework+fixes
This adds a new kind of barrier, and reworks virtio and xen
 to use it.
 Plus some fixes here and there.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio barrier rework+fixes from Michael Tsirkin:
 "This adds a new kind of barrier, and reworks virtio and xen to use it.

  Plus some fixes here and there"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (44 commits)
  checkpatch: add virt barriers
  checkpatch: check for __smp outside barrier.h
  checkpatch.pl: add missing memory barriers
  virtio: make find_vqs() checkpatch.pl-friendly
  virtio_balloon: fix race between migration and ballooning
  virtio_balloon: fix race by fill and leak
  s390: more efficient smp barriers
  s390: use generic memory barriers
  xen/events: use virt_xxx barriers
  xen/io: use virt_xxx barriers
  xenbus: use virt_xxx barriers
  virtio_ring: use virt_store_mb
  sh: move xchg_cmpxchg to a header by itself
  sh: support 1 and 2 byte xchg
  virtio_ring: update weak barriers to use virt_xxx
  Revert "virtio_ring: Update weak barriers to use dma_wmb/rmb"
  asm-generic: implement virt_xxx memory barriers
  x86: define __smp_xxx
  xtensa: define __smp_xxx
  tile: define __smp_xxx
  ...
2016-01-18 16:44:24 -08:00
Linus Torvalds d05d82f711 Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Pull arch/tile updates from Chris Metcalf:
 "This is a grab bag of changes that includes some NOHZ and
  context-tracking related changes, some debugging improvements,
  JUMP_LABEL support, and some fixes for tilepro allmodconfig support.

  We also remove the now-unused node_has_online_mem() definitions both
  for tile's asm/topology.h as well as in linux/topology.h itself"

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  numa: remove stale node_has_online_mem() define
  arch/tile: move user_exit() to early kernel entry sequence
  tile: fix bug in setting PT_FLAGS_DISABLE_IRQ on kernel entry
  tile: fix tilepro casts for readl, writel, etc
  tile: fix a -Wframe-larger-than warning
  tile: include the syscall number in the backtrace
  MAINTAINERS: add git URL for tile
  arch/tile: adopt prepare_exit_to_usermode() model from x86
  tile/jump_label: add jump label support for TILE-Gx
  tile: define a macro ktext_writable_addr to get writable kernel text address
2016-01-18 12:57:18 -08:00
Linus Torvalds d90f351a9b Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32
Pull AVR32 updates from Hans-Christian Noren Egtvedt.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/linux-avr32:
  mmc: atmel: get rid of struct mci_dma_data
  mmc: atmel-mci: restore dma on AVR32
  avr32: wire up missing syscalls
  avr32: wire up accept4 syscall
2016-01-18 12:50:55 -08:00
Linus Torvalds c1a198d923 Merge branch 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs updates from Chris Mason:
 "This has our usual assortment of fixes and cleanups, but the biggest
  change included is Omar Sandoval's free space tree.  It's not the
  default yet, mounting -o space_cache=v2 enables it and sets a readonly
  compat bit.  The tree can actually be deleted and regenerated if there
  are any problems, but it has held up really well in testing so far.

  For very large filesystems (30T+) our existing free space caching code
  can end up taking a huge amount of time during commits.  The new tree
  based code is faster and less work overall to update as the commit
  progresses.

  Omar worked on this during the summer and we'll hammer on it in
  production here at FB over the next few months"

* 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (73 commits)
  Btrfs: fix fitrim discarding device area reserved for boot loader's use
  Btrfs: Check metadata redundancy on balance
  btrfs: statfs: report zero available if metadata are exhausted
  btrfs: preallocate path for snapshot creation at ioctl time
  btrfs: allocate root item at snapshot ioctl time
  btrfs: do an allocation earlier during snapshot creation
  btrfs: use smaller type for btrfs_path locks
  btrfs: use smaller type for btrfs_path lowest_level
  btrfs: use smaller type for btrfs_path reada
  btrfs: cleanup, use enum values for btrfs_path reada
  btrfs: constify static arrays
  btrfs: constify remaining structs with function pointers
  btrfs tests: replace whole ops structure for free space tests
  btrfs: use list_for_each_entry* in backref.c
  btrfs: use list_for_each_entry_safe in free-space-cache.c
  btrfs: use list_for_each_entry* in check-integrity.c
  Btrfs: use linux/sizes.h to represent constants
  btrfs: cleanup, remove stray return statements
  btrfs: zero out delayed node upon allocation
  btrfs: pass proper enum type to start_transaction()
  ...
2016-01-18 12:44:40 -08:00
Linus Torvalds 48f58ba9cb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull more networking fixes from David Miller:

 1) Fix brcmfmac build with older gcc, from Arend van Spriel.

 2) IRQ values unintentionally truncated to u8 in mlx5 driver, from
    Doron Tsur.

 3) Fix build warnings wrt tcp cgroup changes, from Geert Uytterhoeven.

 4) Limit deep recursion in ovs stack, from Hannes Frederic Sowa.

 5) at803x phy driver bug fixes from, Martin Blumenstingl.

 6) Fix TSO handling in hns driver, from Daode Huang

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (22 commits)
  ovs: limit ovs recursions in ovs_execute_actions to not corrupt stack
  team: Replace rcu_read_lock with a mutex in team_vlan_rx_kill_vid
  net: hns: bug fix about hisilicon TSO BD mode
  brcmfmac: fix BRCMF_FW_NVRAM_DEF macro for older gcc compilers
  net: phy: at803x: Add the interrupt register bit definitions
  net: phy: at803x: Clean up duplicate register definitions
  net: phy: at803x: Allow specifying the RGMII RX clock delay via phy mode
  net: phy: at803x: Don't set gbit features for the AR8030 phy
  arm64: bpf: add extra pass to handle faulty codegen
  arm64: insn: remove BUG_ON from codegen
  sctp: the temp asoc's transports should not be hashed/unhashed
  net/mlx5_core: Fix trimming down IRQ number
  tcp_memcontrol: Forward declare cgroup_subsys and mem_cgroup stucts
  batman-adv: Drop immediate orig_node free function
  batman-adv: Drop immediate batadv_hard_iface free function
  batman-adv: Drop immediate neigh_ifinfo free function
  batman-adv: Drop immediate batadv_hardif_neigh_node free function
  batman-adv: Drop immediate batadv_neigh_node free function
  batman-adv: Drop immediate batadv_orig_ifinfo free function
  batman-adv: Avoid recursive call_rcu for batadv_nc_node
  ...
2016-01-18 12:35:14 -08:00
Linus Torvalds 7f36f1b2a8 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide
Pull IDE updates from David Miller:
 "Just a few small changes this merge window, marking ops const, printf
  string type fixes, etc"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide:
  drivers/ide: make ide-scan-pci.c driver explicitly non-modular
  ide: constify ide_dma_ops structures
  ide: silence some underflow warnings
2016-01-18 12:28:57 -08:00
Linus Torvalds c38dec7166 RTC for 4.5
Core:
  - fix module reference count in rtc-proc
  - Replace simple_strtoul by kstrtoul
 
 New driver:
  - Epson RX8010SJ
 
 Subsystem wide cleanups:
  - use %ph for short hex dumps
  - constify *_chip_ops structures
 
 Drivers:
  - abx80x: Microcrystal rv1805 support, alarm support
  - cmos: prevent kernel warning on IRQ flags mismatch
  - s5m: various cleanups
  - rv8803: rx8900 compatibility, small error path fix
  - sunxi: various cleanups
  - lpc32xx: remove irq > NR_IRQS check from probe()
  - imxdi: fix spelling mistake in warning message
  - ds1685: don't try to micromanage sysfs output size
  - da9063: avoid writing undefined data to rtc
  - gemini: Remove unnecessary platform_set_drvdata()
  - efi: add efi_procfs in efi_rtc_ops
  - pcf8523: refuse to write dates later than 2099
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Merge tag 'rtc-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

Pull RTC updates from Alexandre Belloni:
 "Core:
   - fix module reference count in rtc-proc
   - Replace simple_strtoul by kstrtoul

  New driver:
   - Epson RX8010SJ

  Subsystem wide cleanups:
   - use %ph for short hex dumps
   - constify *_chip_ops structures

  Drivers:
   - abx80x: Microcrystal rv1805 support, alarm support
   - cmos: prevent kernel warning on IRQ flags mismatch
   - s5m: various cleanups
   - rv8803: rx8900 compatibility, small error path fix
   - sunxi: various cleanups
   - lpc32xx: remove irq > NR_IRQS check from probe()
   - imxdi: fix spelling mistake in warning message
   - ds1685: don't try to micromanage sysfs output size
   - da9063: avoid writing undefined data to rtc
   - gemini: Remove unnecessary platform_set_drvdata()
   - efi: add efi_procfs in efi_rtc_ops
   - pcf8523: refuse to write dates later than 2099"

* tag 'rtc-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (24 commits)
  rtc: cmos: prevent kernel warning on IRQ flags mismatch
  rtc: rtc-ds2404: constify ds2404_chip_ops structures
  rtc: s5m: Make register configuration per S2MPS device to remove exceptions
  rtc: s5m: Add separate field for storing auto-cleared mask in register config
  rtc: s5m: Cleanup by removing useless 'rtc' prefix from fields
  rtc: Replace simple_strtoul by kstrtoul
  rtc: abx80x: add alarm support
  rtc: abx80x: Add Microcrystal rv1805 support
  rtc: v3020: constify v3020_chip_ops structures
  rtc: rv8803: Extend compatibility with the rx8900
  rtc: rv8803: fix handling return value of i2c_smbus_read_byte_data
  rtc: Add Epson RX8010SJ RTC driver
  rtc: lpc32xx: remove irq > NR_IRQS check from probe()
  rtc: imxdi: fix spelling mistake in warning message
  rtc: ds1685: don't try to micromanage sysfs output size
  rtc: use %ph for short hex dumps
  rtc: da9063: avoid writing undefined data to rtc
  rtc: sunxi: use of_device_get_match_data
  rtc: sunxi: constify the data_year_param structure
  rtc: sunxi: fix signedness issues
  ...
2016-01-18 12:10:45 -08:00
Linus Torvalds d43fb9f3c5 fbdev changes for 4.5
* pxafb: device-tree support
 * An unsafe kernel parameter 'lockless_register_fb' for debugging problems
   happening while inside the console lock
 * Small miscellaneous fixes & cleanups
 * omapdss: add writeback support functions
 * Separation of omapfb and omapdrm (see below)
 
 About the separation of omapfb and omapdrm, see
 http://permalink.gmane.org/gmane.comp.video.dri.devel/143151 for longer story.
 
 The short version:
 
 omapfb and omapdrm have shared low level drivers (omapdss and panel drivers),
 making further development of omapdrm difficult. After these patches omapfb and
 omapdrm have their own versions of the drivers, which are more or less
 direct copies for now but will diverge soon.
 
 This also means that omapfb (everything under drivers/video/fbdev/omap2/) is
 now in maintenance mode, and all new development will be done for omapdrm
 (drivers/gpu/drm/omapdrm/).
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Merge tag 'fbdev-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux

Pull fbdev updates from Tomi Valkeinen:
 "Summary:

   - pxafb: device-tree support
   - An unsafe kernel parameter 'lockless_register_fb' for debugging
     problems happening while inside the console lock
   - Small miscellaneous fixes & cleanups
   - omapdss: add writeback support functions
   - Separation of omapfb and omapdrm (see below)

  About the separation of omapfb and omapdrm, see

    http://permalink.gmane.org/gmane.comp.video.dri.devel/143151

  for longer story.  The short version:

  omapfb and omapdrm have shared low level drivers (omapdss and panel
  drivers), making further development of omapdrm difficult.  After
  these patches omapfb and omapdrm have their own versions of the
  drivers, which are more or less direct copies for now but will diverge
  soon.

  This also means that omapfb (everything under drivers/video/fbdev/omap2/)
  is now in maintenance mode, and all new development will be done for
  omapdrm (drivers/gpu/drm/omapdrm/)"

* tag 'fbdev-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (49 commits)
  video: fbdev: pxafb: fix out of memory error path
  drm/omap: make omapdrm select OMAP2_DSS
  drm/omap: move omapdss & displays under omapdrm
  omapfb: move vrfb into omapfb
  omapfb: take omapfb's private omapdss into use
  omapfb/displays: change CONFIG_DISPLAY_* to CONFIG_FB_OMAP2_*
  omapfb/dss: change CONFIG_OMAP* to CONFIG_FB_OMAP*
  omapdss: remove CONFIG_OMAP2_DSS_VENC from omapdss.h
  omapfb: copy omapdss & displays for omapfb
  omapfb: allow compilation only if DRM_OMAP is disabled
  fbdev: omap2: panel-dpi: simplify gpio setting
  fbdev: omap2: panel-dpi: in .disable first disable backlight then display
  OMAPDSS: DSS: fix a warning message
  video: omapdss: delete unneeded of_node_put
  OMAPDSS: DISPC: Remove boolean comparisons
  OMAPDSS: DSI: cleanup DSI_IRQ_ERROR_MASK define
  OMAPDSS: remove extra out == NULL checks
  OMAPDSS: change internal dispc functions to static
  OMAPDSS: make a two dss feat funcs internal to omapdss
  OMAPDSS: remove extra EXPORT_SYMBOLs
  ...
2016-01-18 11:58:31 -08:00
Chris Metcalf 00d27c6336 numa: remove stale node_has_online_mem() define
This isn't used anywhere, so delete it.

Looks like the last usage (in x86-specific code) was removed by Tejun
in 2011 in commit bd6709a91a ("x86, NUMA: Make 32bit use common NUMA
init path").

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18 14:49:33 -05:00
Chris Metcalf 1bb50cad45 arch/tile: move user_exit() to early kernel entry sequence
This ensures that we always notify context tracking that we
have exited from user space no matter how we enter the kernel.
It is similar to how arm64 handles context tracking, for example.

This allows the removal of all the exception_enter() calls that
were added in commit 49e4e15619 ("tile: support CONTEXT_TRACKING and
thus NOHZ_FULL").

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18 14:49:30 -05:00
Chris Metcalf 9ce815ed50 tile: fix bug in setting PT_FLAGS_DISABLE_IRQ on kernel entry
This flag value is saved in ptregs and used to decide whether
to disable irqs when returning from the kernel.  Commit 1168df528fe4
("tile: don't assume user privilege is zero") performed a bad
merge from some KVM-enabled code that had not yet been upstreamed.

The only issue with the old code is that we will read the interrupt
mask in more conditions than we need to (e.g., coming from user
space when user space has the Interrupt Critical Section bit set, or
coming from a guest kernel), which is a slow multi-cycle operation.
This change saves those few cycles in the common case.

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18 14:49:26 -05:00
Chris Metcalf acfb699e3d tile: fix tilepro casts for readl, writel, etc
Missing parentheses could cause an argument of the form
"integer + pointer" to get cast to "(long)integer + pointer"
and remain a pointer type, causing compiler warnings.

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18 14:49:23 -05:00
Chris Metcalf f3a26163fa tile: fix a -Wframe-larger-than warning
The warning occurs in setup.c, where it is known that it can't be
a problem, but it's still a good idea to silence the warning.
The onstack array is converted from an s32 to a u8, which still
is plenty of range for the values being managed there.

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18 14:49:19 -05:00
Chris Metcalf 5ac65abd48 tile: include the syscall number in the backtrace
This information is easily available in the backtrace data and can
be helpful when trying to figure out the backtrace, particularly
if we're early in kernel entry or late in kernel exit.

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18 14:49:16 -05:00
Fengguang Wu 7fa129ccb9 MAINTAINERS: add git URL for tile
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18 14:49:13 -05:00
Chris Metcalf 583b24a210 arch/tile: adopt prepare_exit_to_usermode() model from x86
This change is a prerequisite change for TASK_ISOLATION but also
stands on its own for readability and maintainability.  The existing
tile do_work_pending() was called in a loop from assembly on
the slow path; this change moves the loop into C code as well.
For the x86 version see commit c5c46f59e4 ("x86/entry: Add new,
comprehensible entry and exit handlers written in C").

This change exposes a pre-existing bug on the older tilepro platform;
the singlestep processing is done last, but on tilepro (unlike tilegx)
we enable interrupts while doing that processing, so we could in
theory miss a signal or other asynchronous event.  A future change
could fix this by breaking the singlestep work into a "prepare"
step done in the main loop, and a "trigger" step done after exiting
the loop.  Since this change is intended as purely a restructuring
change, we call out the bug explicitly now, but don't yet fix it.

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
2016-01-18 14:49:09 -05:00
Paul Gortmaker e04a2bd6d8 drivers/ide: make ide-scan-pci.c driver explicitly non-modular
The Kconfig for this support is currently:

config IDEPCI_PCIBUS_ORDER
        bool "Probe IDE PCI devices in the PCI bus order (DEPRECATED)"

...meaning that it currently is not being built as a module by anyone.
Lets change the initcall to be the equivalent device_initcall, so that
when reading the driver code, there is no doubt it is builtin-only.

Unlike other similar changes, we leave the module.h header to be
included since this code interacts with other drivers and needs to
know what a struct module is.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-ide@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-18 14:12:33 -05:00
Julia Lawall b5a608fb28 ide: constify ide_dma_ops structures
The ide_dma_ops structures are never modified, so declare these as const,
as is already done for the others.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-18 14:12:33 -05:00
Dan Carpenter 0860bf9471 ide: silence some underflow warnings
Back in the day we used to just say this code was root only so it was
ok that the bounds checking was sloppy.  These days it annoys static
checkers so we fix it.

In the original code "c > INT_MAX" was never true since "c" was an int.
I am not sure what was intended so I left it alone.  But because I made
"c" unsigned it means we don't have a warning any more.

The second warning is that we cap "i" but allow negatives leading to an
underflow of the ide_disks_chs[] array.  The third set of warnings is
because these values come from the user and we cap most of the upper
bounds but allow negative values.  Negative cylinders doesn't make
sense.

drivers/ide/ide.c:262 ide_set_disk_chs() warn: impossible condition '(c > ((~0 >> 1))) => (s32min-s32max > s32max)'
drivers/ide/ide.c:270 ide_set_disk_chs() warn: check 'ide_disks_chs[i]' for negative offsets 'i' = s32min.  extra = 's32min-19'
drivers/ide/ide.c:271 ide_set_disk_chs() warn: no lower bound on 'h'

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-01-18 14:12:33 -05:00