Commit graph

36230 commits

Author SHA1 Message Date
Olof Johansson
35db05bb9d Merge branch 'omap/usb' into next/dt2
Merging in dependencies for the omap/dt branch.

* omap/usb: (21 commits)
  ARM: dts: omap3-beagle: Add USB Host support
  ARM: dts: OMAP3: Add HS USB Host IP nodes
  ARM: dts: OMAP4: Add HS USB Host IP nodes
  ARM: OMAP: zoom: Adapt to ehci-omap changes
  ARM: OMAP3: overo: Adapt to ehci-omap changes
  ARM: OMAP3: omap3touchbook: Adapt to ehci-omap changes
  ARM: OMAP3: omap3stalker: Adapt to ehci-omap changes
  ARM: OMAP3: omap3pandora: Adapt to ehci-omap changes
  ARM: OMAP3: omap3evm: Adapt to ehci-omap changes
  ARM: OMAP3: igep0020: Adapt to ehci-omap changes
  ARM: OMAP: devkit8000: Adapt to ehci-omap changes
  ARM: OMAP3: cm-t3517: Adapt to ehci-omap changes
  ARM: OMAP3: cm-t35: Adapt to ehci-omap changes
  ARM: OMAP: AM3517evm: Adapt to ehci-omap changes
  ARM: OMAP: AM3517crane: Adapt to ehci-omap changes
  ARM: OMAP3: 3630SDP: Adapt to ehci-omap changes
  ARM: OMAP3: 3430SDP: Adapt to ehci-omap changes
  ARM: OMAP3: Beagle: Adapt to ehci-omap changes
  ARM: OMAP2+: omap4panda: Adapt to ehci-omap changes
  ARM: OMAP2+: omap-usb-host: Add usbhs_init_phys()
  ...

Signed-off-by: Olof Johansson <olof@lixom.net>
2013-04-11 04:04:25 -07:00
Olof Johansson
b9d5868e34 Cleanups for Allwinner sunXi architecture:
- Remove sunxi.dtsi
   - Switch to clocksource/irqchip device tree handlers
   - Cleanup the watchdog code
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Merge tag 'sunxi-cleanup-for-3.10' of git://github.com/mripard/linux into next/cleanup

From Maxime Ripard:
Cleanups for Allwinner sunXi architecture:
  - Remove sunxi.dtsi
  - Switch to clocksource/irqchip device tree handlers
  - Cleanup the watchdog code

* tag 'sunxi-cleanup-for-3.10' of git://github.com/mripard/linux:
  ARM: sunxi: Rework the restart code
  irqchip: sunxi: Rename sunxi to sun4i
  irqchip: sunxi: Make use of the IRQCHIP_DECLARE macro
  clocksource: sunxi: Rename sunxi to sun4i
  clocksource: sunxi: make use of CLKSRC_OF
  clocksource: sunxi: Cleanup the timer code
  clocksource: make CLOCKSOURCE_OF_DECLARE type safe

Signed-off-by: Olof Johansson <olof@lixom.net>

Add/change conflict in drivers/clocksource/Makefile resolved.
2013-04-11 03:39:00 -07:00
Olof Johansson
83c15f4c05 Merge branch 'depends/clk-for-3.10' into next/cleanup
Bringin in clk subsystem dependencies needed by sunxi.

* depends/clk-for-3.10: (26 commits)
  clk: sunxi: drop an unnecesary kmalloc
  clk: sunxi: drop CLK_IGNORE_UNUSED
  clk: sunxi: Add support for AXI, AHB, APB0 and APB1 gates
  clk: divider: Introduce CLK_DIVIDER_ALLOW_ZERO flag
  clk: mvebu: Use common of_clk_init() function
  clk: fix clk_mux::flags kerneldoc
  clk: allow reentrant calls into the clk framework
  clk: abstract locking out into helper functions
  clk: zynq: Add missing zynq clk header
  clk: sunxi: rename compatible strings
  arm: sunxi: Add useful information about sunxi clocks
  clk: arm: sunxi: Add a new clock driver for sunxi SOCs
  clk: ux500: Fix prcmu clocks registration
  ARM: imx: adapt clk_busy_mux to new clk_mux struct
  clk: Add composite clock type
  clk: add table lookup to mux
  clk: Fix incorrect return type in clk.c
  clk: prima2: fix return value check in sirfsoc_of_clk_init()
  clk:SPEAr1340: Correct parent clock configuration
  documentation: clk: fix couple of misspelling
  ...
2013-04-11 03:38:03 -07:00
Olof Johansson
70384d3f12 Merge branch 'armsoc/pxa' of git://github.com/hzhuang1/linux into next/boards
A series dealing with gpio configuration cleanup from Haojian Zhuang.

* 'armsoc/pxa' of git://github.com/hzhuang1/linux:
  ARM: pxa: move debug uart code
  ARM: pxa: select PXA935 on saar & tavorevb
  ARM: mmp: add more compatible names in gpio driver
  ARM: pxa: move PXA_GPIO_TO_IRQ macro
  ARM: pxa: remove cpu_is_xxx in gpio driver

Signed-off-by: Olof Johansson <olof@lixom.net>
2013-04-11 02:56:18 -07:00
Haojian Zhuang
b8f649f1f5 ARM: pxa: move PXA_GPIO_TO_IRQ macro
Since PXA_GPIO_TO_IRQ() & MMP_GPIO_TO_IRQ() macro are depended on
arch code, move them from gpio driver to platform driver instead.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
2013-04-11 10:00:05 +08:00
Soren Brinkmann
fb72a0590b clk: Properly handle notifier return values
Notifiers may return NOTIFY_(OK|DONE|STOP|BAD). The CCF uses an
inconsistent mix of checking against NOTIFY_STOP or NOTIFY_BAD.
This inconsistency leaves errors undetected in some cases:
clk_set_parent() calls __clk_speculate_rates(), which stops when it
hits a NOTIFIER_BAD (STOP is ignored), and passes this value back to the
caller.
clk_set_parent() compares this return value against NOTIFY_STOP only,
ignoring NOTIFY_BAD returns.

Use NOTIFY_STOP_MASK to detect a negative notifier return value and
document all four return value options.

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-04-10 16:33:53 -07:00
Rafael J. Wysocki
7fc7acb9a0 gpio / ACPI: Handle ACPI events in accordance with the spec
Commit 0d1c28a (gpiolib-acpi: Add ACPI5 event model support to gpio.)
that added support for ACPI events signalled through GPIO interrupts
covered only GPIO pins whose numbers are less than or equal to 255.
However, there may be GPIO pins with numbers greater than 255 and
the ACPI spec (ACPI 5.0, Section 5.6.5.1) requires the _EVT method
to be used for handling events corresponding to those pins.

Moreover, according to the spec, _EVT is the default mechanism
for handling all ACPI events signalled through GPIO interrupts,
so if the _Exx/_Lxx method is not present for the given pin,
_EVT should be used instead.  If present, though, _Exx/_Lxx take
precedence over _EVT which shouldn't be executed in that case
(ACPI 5.0, Section 5.6.5.3).

Modify acpi_gpiochip_request_interrupts() to follow the spec as
described above and add acpi_gpiochip_free_interrupts() needed
to free interrupts associated with _EVT.

Signed-off-by: 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>
2013-04-10 23:41:17 +02:00
Andreas Larsson
2b78f1e138 gpio: gpio-generic: Add 16 and 32 bit big endian byte order support
There is no general support for 64-bit big endian accesses, so that is
left unsupported.

Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Acked-by: Anton Vorontsov <anton@enomsg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-04-10 23:41:16 +02:00
Linus Torvalds
fe2971a017 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) cfg80211_conn_scan() must be called with the sched_scan_mutex, fix
    from Artem Savkov.

 2) Fix regression in TCP ICMPv6 processing, we do not want to treat
    redirects as socket errors, from Christoph Paasch.

 3) Fix several recvmsg() msg_name kernel memory leaks into userspace,
    in ATM, AX25, Bluetooth, CAIF, IRDA, s390 IUCV, L2TP, LLC, Netrom,
    NFC, Rose, TIPC, and VSOCK.  From Mathias Krause and Wei Yongjun.

 4) Fix AF_IUCV handling of segmented SKBs in recvmsg(), from Ursula
    Braun and Eric Dumazet.

 5) CAN gw.c code does kfree() on SLAB cache memory, use
    kmem_cache_free() instead.  Fix from Wei Yongjun.

 6) Fix LSM regression on TCP SYN/ACKs, some LSMs such as SELINUX want
    an skb->sk socket context available for these packets, but nothing
    else requires it.  From Eric Dumazet and Paul Moore.

 7) Fix ipv4 address lifetime processing so that we don't perform
    sleepable acts inside of rcu_read_lock() sections, do them in an
    rtnl_lock() section instead.  From Jiri Pirko.

 8) mvneta driver accidently sets HW features after device registry, it
    should do so beforehand.  Fix from Willy Tarreau.

 9) Fix bonding unload races more correctly, from Nikolay Aleksandrov
    and Veaceslav Falico.

10) rtnl_dump_ifinfo() and rtnl_calcit() invoke nlmsg_parse() with wrong
    header size argument.  Fix from Michael Riesch.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (44 commits)
  lsm: add the missing documentation for the security_skb_owned_by() hook
  bnx2x: Prevent null pointer dereference in AFEX mode
  e100: Add dma mapping error check
  selinux: add a skb_owned_by() hook
  can: gw: use kmem_cache_free() instead of kfree()
  netrom: fix invalid use of sizeof in nr_recvmsg()
  qeth: fix qeth_wait_for_threads() deadlock for OSN devices
  af_iucv: fix recvmsg by replacing skb_pull() function
  rtnetlink: Call nlmsg_parse() with correct header length
  bonding: fix bonding_masters race condition in bond unloading
  Revert "bonding: remove sysfs before removing devices"
  net: mvneta: enable features before registering the driver
  hyperv: Fix RNDIS send_completion code path
  hyperv: Fix a kernel warning from netvsc_linkstatus_callback()
  net: ipv4: fix schedule while atomic bug in check_lifetime()
  net: ipv4: reset check_lifetime_work after changing lifetime
  bnx2x: Fix KR2 rapid link flap
  sctp: remove 'sridhar' from maintainers list
  VSOCK: Fix missing msg_namelen update in vsock_stream_recvmsg()
  VSOCK: vmci - fix possible info leak in vmci_transport_dgram_dequeue()
  ...
2013-04-10 14:15:27 -07:00
Paul Moore
6b07a24fc3 lsm: add the missing documentation for the security_skb_owned_by() hook
Unfortunately we didn't catch the missing comments earlier when the
patch was merged.

Signed-off-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-10 15:40:39 -04:00
John W. Linville
655d8e2328 Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Conflicts:
	drivers/net/wireless/ath/carl9170/debug.c
	drivers/net/wireless/ath/carl9170/main.c
	net/mac80211/ieee80211_i.h
2013-04-10 14:09:54 -04:00
Li Zefan
78574cf981 cgroup: implement cgroup_is_descendant()
A couple controllers want to determine whether two cgroups are in
ancestor/descendant relationship.  As it's more likely that the
descendant is the primary subject of interest and there are other
operations focusing on the descendants, let's ask is_descendent rather
than is_ancestor.

Implementation is trivial as the previous patch guarantees that all
ancestors of a cgroup stay accessible as long as the cgroup is
accessible.

tj: Removed depth optimization, renamed from cgroup_is_ancestor(),
    rewrote descriptions.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2013-04-10 11:07:08 -07:00
Rami Rosen
84cfb6ab48 cgroup: remove bind() method from cgroup_subsys.
The bind() method of cgroup_subsys is not used in any of the
controllers (cpuset, freezer, blkio, net_cls, memcg, net_prio,
devices, perf, hugetlb, cpu and cpuacct)

tj: Removed the entry on ->bind() from
    Documentation/cgroups/cgroups.txt.  Also updated a couple
    paragraphs which were suggesting that dynamic re-binding may be
    implemented.  It's not gonna.

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2013-04-10 10:46:59 -07:00
Chen Gang
2950fa9d32 kernel: audit: beautify code, for extern function, better to check its parameters by itself
__audit_socketcall is an extern function.
  better to check its parameters by itself.

    also can return error code, when fail (find invalid parameters).
    also use macro instead of real hard code number
    also give related comments for it.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
[eparis: fix the return value when !CONFIG_AUDIT]
Signed-off-by: Eric Paris <eparis@redhat.com>
2013-04-10 13:31:12 -04:00
Anton Blanchard
cdee3904b4 audit: Syscall rules are not applied to existing processes on non-x86
Commit b05d8447e7 (audit: inline audit_syscall_entry to reduce
burden on archs) changed audit_syscall_entry to check for a dummy
context before calling __audit_syscall_entry. Unfortunately the dummy
context state is maintained in __audit_syscall_entry so once set it
never gets cleared, even if the audit rules change.

As a result, if there are no auditing rules when a process starts
then it will never be subject to any rules added later. x86 doesn't
see this because it has an assembly fast path that calls directly into
__audit_syscall_entry.

I noticed this issue when working on audit performance optimisations.
I wrote a set of simple test cases available at:

http://ozlabs.org/~anton/junkcode/audit_tests.tar.gz

02_new_rule.py fails without the patch and passes with it. The
test case clears all rules, starts a process, adds a rule then
verifies the process produces a syscall audit record.

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: <stable@kernel.org> # 3.3+
Signed-off-by: Eric Paris <eparis@redhat.com>
2013-04-10 12:48:34 -04:00
Bjorn Helgaas
10629d711e PCI: Remove __weak annotation from pcibios_get_phb_of_node decl
The __weak annotation on the pcibios_get_phb_of_node() declaration
causes *every* definition to be marked "weak."  The linker then
selects one based on link order, which may be the wrong one.

Gabor found that on MIPS, the linker selected the generic implementation
from drivers/pci even though arch/mips supplied a definition without the
__weak annotation:

$ mipsel-openwrt-linux-readelf -s arch/mips/pci/built-in.o \
    drivers/pci/built-in.o vmlinux.o | grep pcibios_get_phb_of_node
      86: 0000046c    12 FUNC    WEAK   DEFAULT    2 pcibios_get_phb_of_node
    1430: 00012e2c   104 FUNC    WEAK   DEFAULT    2 pcibios_get_phb_of_node
   31898: 0017e4ec   104 FUNC    WEAK   DEFAULT    2 pcibios_get_phb_of_node

This removes the __weak annotation from the pcibios_get_phb_of_node()
declaration so arch-specific non-weak implementations work reliably.

Suggested-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2013-04-10 09:56:54 -06:00
John W. Linville
d3641409a0 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
Conflicts:
	drivers/net/wireless/rt2x00/rt2x00pci.c
	net/mac80211/sta_info.c
	net/wireless/core.h
2013-04-10 10:39:27 -04:00
Rafał Miłecki
46fc4c9093 ssb: implement spurious tone avoidance
And make use of it in b43. This fixes a regression introduced with
49d55cef5b
b43: N-PHY: implement spurious tone avoidance
This commit made BCM4322 use only MCS 0 on channel 13, which of course
resulted in performance drop (down to 0.7Mb/s).

Reported-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2013-04-10 10:31:26 -04:00
Li Zefan
479f614110 cgroup: Kill subsys.active flag
The only user was cpuacct.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Li Zefan <lizefan@huawei.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/5155385A.4040207@huawei.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-04-10 13:54:22 +02:00
Ingo Molnar
8fcfae3171 Merge branch 'rcu/next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull RCU updates from Paul E. McKenney:

  * Remove restrictions on no-CBs CPUs, make RCU_FAST_NO_HZ
    take advantage of numbered callbacks, do additional callback
    accelerations based on numbered callbacks.  Posted to LKML
    at https://lkml.org/lkml/2013/3/18/960.

  * RCU documentation updates.  Posted to LKML at
    https://lkml.org/lkml/2013/3/18/570.

  * Miscellaneous fixes.  Posted to LKML at
    https://lkml.org/lkml/2013/3/18/594.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-04-10 12:55:49 +02:00
J. Bruce Fields
06b332a522 nfsd4: check backchannel attributes on create_session
Make sure the client gives us an adequate backchannel.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2013-04-09 16:53:56 -04:00
Alexander Shiyan
066ec1dd44 of: Add stub of_get_parent for non-OF builds
Fixes build error on x86_64 allmodconfig, introduced by commit
5ab3a89a74 ("mfd: syscon: Add non-DT support").

drivers/regulator/anatop-regulator.c: In function 'anatop_regulator_probe':
drivers/regulator/anatop-regulator.c:134:2: error: implicit declaration of function 'of_get_parent' [-Werror=implicit-function-declaration]

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2013-04-09 22:50:33 +02:00
Sergei Shtylyov
d450f445f9 <linux/of_platform.h>: fix compilation warnings with DT disabled
Fix the following compilation warnings (in Simon Horman's renesas.git repo):

In file included from arch/arm/mach-shmobile/setup-r8a7779.c:24:0:
include/linux/of_platform.h:107:13: warning: ‘struct of_device_id’ declared
inside parameter list [enabled by default]
include/linux/of_platform.h:107:13: warning: its scope is only this definition
or declaration, which is probably not what you want [enabled by default]
include/linux/of_platform.h:107:13: warning: ‘struct device_node’ declared
inside parameter list [enabled by default]

<linux/of_platform.h> only #include's headers with definitions of the above
mentioned structures if CONFIG_OF_DEVICE=y but uses them even if not. One
solution is to move some #include's out of #ifdef CONFIG_OF_DEVICE and use
incomplete declarations for the rest of the structures where the #ifdef move
doesn't help...

Reported-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2013-04-09 14:58:32 -05:00
Linus Torvalds
e8f2b548de Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro:
 "A nasty bug in fs/namespace.c caught by Andrey + a couple of less
  serious unpleasantness - ecryptfs misc device playing hopeless games
  with try_module_get() and palinfo procfs support being...  not quite
  correctly done, to be polite."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  mnt: release locks on error path in do_loopback
  palinfo fixes
  procfs: add proc_remove_subtree()
  ecryptfs: close rmmod race
2013-04-09 12:22:49 -07:00
Al Viro
05c0ae21c0 try a saner locking for pde_opener...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 15:16:52 -04:00
Al Viro
866ad9a747 procfs: preparations for remove_proc_entry() race fixes
* leave ->proc_fops alone; make ->pde_users negative instead
* trim pde_opener
* move relevant code in fs/proc/inode.c

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 15:16:51 -04:00
Jozsef Kadlecsik
6eb4c7e96e netfilter: ipset: hash:*net*: nomatch flag not excluded on set resize
If a resize is triggered the nomatch flag is not excluded at hashing,
which leads to the element missed at lookup in the resized set.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-04-09 21:04:16 +02:00
David Howells
80e928f7eb proc: Kill create_proc_entry()
Kill create_proc_entry() in favour of create_proc_read_entry(), proc_create()
and proc_create_data().

Signed-off-by: David Howells <dhowells@redhat.com>
2013-04-09 14:16:39 -04:00
Al Viro
fbd387aea0 create_proc_cpu_mask() doesn't need an argument...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:13:35 -04:00
Al Viro
d9dda78bad procfs: new helper - PDE_DATA(inode)
The only part of proc_dir_entry the code outside of fs/proc
really cares about is PDE(inode)->data.  Provide a helper
for that; static inline for now, eventually will be moved
to fs/proc, along with the knowledge of struct proc_dir_entry
layout.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:13:32 -04:00
Al Viro
ee21ed0afc procfs: kill ->write_proc()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:13:32 -04:00
Al Viro
2043f495c7 new helper: single_open_size()
Same as single_open(), but preallocates the buffer of given size.
Doesn't make any sense for sizes up to PAGE_SIZE and doesn't make
sense if output of show() exceeds PAGE_SIZE only rarely - seq_read()
will take care of growing the buffer and redoing show().  If you
_know_ that it will be large, it might make more sense to look into
saner iterator, rather than go with single-shot one.  If that's
impossible, single_open_size() might be for you.

Again, don't use that without a good reason; occasionally that's really
the best way to go, but very often there are better solutions.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:13:29 -04:00
Al Viro
021ada7dff procfs: switch /proc/self away from proc_dir_entry
Just have it pinned in dcache all along and let procfs ->kill_sb()
drop it before kill_anon_super().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:13:05 -04:00
Al Viro
4b8a8f1e4f get rid of the last free_pipe_info() callers
and rename __free_pipe_info() to free_pipe_info()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:13:02 -04:00
Al Viro
7bee130e22 get rid of alloc_pipe_info() argument
not used anymore

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:13:01 -04:00
Al Viro
6447a3cf19 get rid of pipe->inode
it's used only as a flag to distinguish normal pipes/FIFOs from the
internal per-task one used by file-to-file splice.  And pipe->files
would work just as well for that purpose...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:13:01 -04:00
Al Viro
72b0d9aacb pipe: don't use ->i_mutex
now it can be done - put mutex into pipe_inode_info, use it instead
of ->i_mutex

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:13:00 -04:00
Al Viro
ba5bb14733 pipe: take allocation and freeing of pipe_inode_info out of ->i_mutex
* new field - pipe->files; number of struct file over that pipe (all
  sharing the same inode, of course); protected by inode->i_lock.
* pipe_release() decrements pipe->files, clears inode->i_pipe when
  if the counter has reached 0 (all under ->i_lock) and, in that case,
  frees pipe after having done pipe_unlock()
* fifo_open() starts with grabbing ->i_lock, and either bumps pipe->files
  if ->i_pipe was non-NULL or allocates a new pipe (dropping and regaining
  ->i_lock) and rechecks ->i_pipe; if it's still NULL, inserts new pipe
  there, otherwise bumps ->i_pipe->files and frees the one we'd allocated.
  At that point we know that ->i_pipe is non-NULL and won't go away, so
  we can do pipe_lock() on it and proceed as we used to.  If we end up
  failing, decrement pipe->files and if it reaches 0 clear ->i_pipe and
  free the sucker after pipe_unlock().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:12:59 -04:00
Al Viro
599a0ac14e pipe: fold file_operations instances in one
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:12:58 -04:00
Al Viro
8d71db4f08 lift sb_start_write/sb_end_write out of ->aio_write()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:12:55 -04:00
Al Viro
8ce584c741 procfs: add proc_remove_subtree()
just what it sounds like; do that only to procfs subtrees you've
created - doing that to something shared with another driver is
not only antisocial, but might cause interesting races with
proc_create() and its ilk.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-04-09 14:09:17 -04:00
Linus Torvalds
386afc9114 spinlocks and preemption points need to be at least compiler barriers
In UP and non-preempt respectively, the spinlocks and preemption
disable/enable points are stubbed out entirely, because there is no
regular code that can ever hit the kind of concurrency they are meant to
protect against.

However, while there is no regular code that can cause scheduling, we
_do_ end up having some exceptional (literally!) code that can do so,
and that we need to make sure does not ever get moved into the critical
region by the compiler.

In particular, get_user() and put_user() is generally implemented as
inline asm statements (even if the inline asm may then make a call
instruction to call out-of-line), and can obviously cause a page fault
and IO as a result.  If that inline asm has been scheduled into the
middle of a preemption-safe (or spinlock-protected) code region, we
obviously lose.

Now, admittedly this is *very* unlikely to actually ever happen, and
we've not seen examples of actual bugs related to this.  But partly
exactly because it's so hard to trigger and the resulting bug is so
subtle, we should be extra careful to get this right.

So make sure that even when preemption is disabled, and we don't have to
generate any actual *code* to explicitly tell the system that we are in
a preemption-disabled region, we need to at least tell the compiler not
to move things around the critical region.

This patch grew out of the same discussion that caused commits
79e5f05edc ("ARC: Add implicit compiler barrier to raw_local_irq*
functions") and 3e2e0d2c22 ("tile: comment assumption about
__insn_mtspr for <asm/irqflags.h>") to come about.

Note for stable: use discretion when/if applying this.  As mentioned,
this bug may never have actually bitten anybody, and gcc may never have
done the required code motion for it to possibly ever trigger in
practice.

Cc: stable@vger.kernel.org
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-04-09 10:48:33 -07:00
Eric Dumazet
ca10b9e9a8 selinux: add a skb_owned_by() hook
Commit 90ba9b1986 (tcp: tcp_make_synack() can use alloc_skb())
broke certain SELinux/NetLabel configurations by no longer correctly
assigning the sock to the outgoing SYNACK packet.

Cost of atomic operations on the LISTEN socket is quite big,
and we would like it to happen only if really needed.

This patch introduces a new security_ops->skb_owned_by() method,
that is a void operation unless selinux is active.

Reported-by: Miroslav Vadkerti <mvadkert@redhat.com>
Diagnosed-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-security-module@vger.kernel.org
Acked-by: James Morris <james.l.morris@oracle.com>
Tested-by: Paul Moore <pmoore@redhat.com>
Acked-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-09 13:23:11 -04:00
Daniel Borkmann
1b86643411 net: sctp: introduce uapi header for sctp
This patch introduces an UAPI header for the SCTP protocol,
so that we can facilitate the maintenance and development of
user land applications or libraries, in particular in terms
of header synchronization.

To not break compatibility, some fragments from lksctp-tools'
netinet/sctp.h have been carefully included, while taking care
that neither kernel nor user land breaks, so both compile fine
with this change (for lksctp-tools I tested with the old
netinet/sctp.h header and with a newly adapted one that includes
the uapi sctp header). lksctp-tools smoke test run through
successfully as well in both cases.

Suggested-by: Neil Horman <nhorman@tuxdriver.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-09 13:19:39 -04:00
Arnd Bergmann
f8da810cbb Merge branch 'tegra/clk' into next/dt2
This is a dependency for the tegra/dt branch.

Conflicts:
	drivers/clocksource/tegra20_timer.c

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-04-09 17:52:43 +02:00
Arnd Bergmann
2b07910131 ARM: tegra: clock driver development
This branch contains most fixes and enhancements to the Tegra common
 clock driver. The main new feature is a driver for Tegra114, which
 coupled with later device tree changes enables many devices on that
 chip, such as MMC, I2C, etc.
 
 This branch depends on a patch in:
 
 git://git.linaro.org/people/mturquette/linux.git clk-for-3.10
 
 Mike has stated that this branch is stable, and is aware of this
 dependency and merge.
 
 Mike's branch is based on v3.9-rc3, which includes a USB change which
 causes problems on Tegra. That problem was fixed in v3.9-rc4. Hence,
 this branch pulls in v3.9-rc4 to ensure bisectability as much as
 possible.
 
 This branch is based on v3.9-rc4, followed by a merge of previous Tegra
 "soc" pull request, followed by a merge of clk-for-3.10.
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Merge tag 'tegra-for-3.10-clk' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/drivers

From Stephen Warren <swarren@wwwdotorg.org>:

ARM: tegra: clock driver development

This branch contains most fixes and enhancements to the Tegra common
clock driver. The main new feature is a driver for Tegra114, which
coupled with later device tree changes enables many devices on that
chip, such as MMC, I2C, etc.

This branch depends on a patch in:

git://git.linaro.org/people/mturquette/linux.git clk-for-3.10

Mike has stated that this branch is stable, and is aware of this
dependency and merge.

Mike's branch is based on v3.9-rc3, which includes a USB change which
causes problems on Tegra. That problem was fixed in v3.9-rc4. Hence,
this branch pulls in v3.9-rc4 to ensure bisectability as much as
possible.

This branch is based on v3.9-rc4, followed by a merge of previous Tegra
"soc" pull request, followed by a merge of clk-for-3.10.

* tag 'tegra-for-3.10-clk' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra:
  clk: tegra: fix enum tegra114_clk to match binding
  clk: tegra: Remove forced clk_enable of uartd
  ARM: dt: Add references to tegra_car clocks
  clk: tegra: devicetree match for nvidia,tegra114-car
  clk: tegra: Implement clocks for Tegra114
  ARM: tegra: Define Tegra114 CAR binding
  clk: tegra: Workaround for Tegra114 MSENC problem
  clk: tegra: Add flags to tegra_clk_periph()
  clk: tegra: Add new fields and PLL types for Tegra114
  clk: tegra: move from a lock bit idx to a lock mask
  clk: tegra: Add PLL post divider table
  clk: tegra: introduce TEGRA_PLL_HAS_LOCK_ENABLE
  clk: tegra: Add TEGRA_PLL_BYPASS flag
  clk: tegra: Refactor PLL programming code
  clk: tegra: provide dummy cpu car ops
  clk: tegra: defer application of init table
  clk: tegra: Fix cdev1 and cdev2 IDs
  clk: tegra: Make gr2d and gr3d clocks children of pll_c
  clk: tegra: Export peripheral reset functions
  clk: tegra: Fix periph_clk_to_bit macro

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-04-09 17:10:31 +02:00
Arnd Bergmann
5790c58b13 Merge branch 'depends/clk' into next/drivers
This is a snapshot of the stable clk branch at

git://git.linaro.org/people/mturquette/linux.git clk-for-3.10

which is a dependency for the tegra clock changes.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-04-09 17:09:35 +02:00
Arnd Bergmann
494cc76061 ARM: tegra: multi-platform conversion
This branch converts Tegra to support multi-platform/single-zImage.
 
 One header is made accessible to drivers. The earlyprintk implementation
 is moved to the multi-platform location. Some Kconfig changes are made
 to enable multi-platform. Some dead files are deleted.
 
 The APIs exposed in the now-global tegra-powergate.h should be replaced
 with standard reset and power domain APIs in the future.
 
 This branch is based on (part of) the previous soc pull request.
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Merge tag 'tegra-for-3.10-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into next/multiplatform

From Stephen Warren <swarren@wwwdotorg.org>:

ARM: tegra: multi-platform conversion

This branch converts Tegra to support multi-platform/single-zImage.

One header is made accessible to drivers. The earlyprintk implementation
is moved to the multi-platform location. Some Kconfig changes are made
to enable multi-platform. Some dead files are deleted.

The APIs exposed in the now-global tegra-powergate.h should be replaced
with standard reset and power domain APIs in the future.

This branch is based on (part of) the previous soc pull request.

* tag 'tegra-for-3.10-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra:
  ARM: tegra: convert to multi-platform
  ARM: tegra: move <mach/powergate.h> to <linux/tegra-powergate.h>

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-04-09 16:55:15 +02:00
Arnd Bergmann
b8250dc419 Changes needed for enabling SOC_BUS for the SoC revision
information. Also enable few HW errata workarounds for omap4.
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Merge tag 'omap-for-v3.10/soc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/soc

From Tony Lindgren <tony@atomide.com>:

Changes needed for enabling SOC_BUS for the SoC revision
information. Also enable few HW errata workarounds for omap4.

* tag 'omap-for-v3.10/soc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (236 commits)
  ARM: OMAP4: Enable fix for Cortex-A9 erratas
  ARM: OMAP2+: Export SoC information to userspace
  ARM: OMAP2+: SoC name and revision unification
  ARM: OMAP2+: Move common part of late init into common function

Includes an update to Linux 3.9-rc6

Conflicts:
	arch/arm/mach-omap2/cclock44xx_data.c

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-04-09 16:40:45 +02:00
Arnd Bergmann
71f6424023 Merge branch 'mxs/cleanup' into next/multiplatform
This is a dependency for mxs/multiplatform

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Conflicts:
	drivers/clocksource/Makefile
2013-04-09 16:02:14 +02:00