GitHub/LineageOS/G12/android_kernel_amlogic_linux-4.9.git
13 years agoPM: Limit race conditions between runtime PM and system sleep (v2)
Rafael J. Wysocki [Wed, 6 Jul 2011 08:51:58 +0000 (10:51 +0200)]
PM: Limit race conditions between runtime PM and system sleep (v2)

One of the roles of the PM core is to prevent different PM callbacks
executed for the same device object from racing with each other.
Unfortunately, after commit e8665002477f0278f84f898145b1f141ba26ee26
(PM: Allow pm_runtime_suspend() to succeed during system suspend)
runtime PM callbacks may be executed concurrently with system
suspend/resume callbacks for the same device.

The main reason for commit e8665002477f0278f84f898145b1f141ba26ee26
was that some subsystems and device drivers wanted to use runtime PM
helpers, pm_runtime_suspend() and pm_runtime_put_sync() in
particular, for carrying out the suspend of devices in their
.suspend() callbacks.  However, as it's been determined recently,
there are multiple reasons not to do so, inlcuding:

 * The caller really doesn't control the runtime PM usage counters,
   because user space can access them through sysfs and effectively
   block runtime PM.  That means using pm_runtime_suspend() or
   pm_runtime_get_sync() to suspend devices during system suspend
   may or may not work.

 * If a driver calls pm_runtime_suspend() from its .suspend()
   callback, it causes the subsystem's .runtime_suspend() callback to
   be executed, which leads to the call sequence:

   subsys->suspend(dev)
      driver->suspend(dev)
         pm_runtime_suspend(dev)
            subsys->runtime_suspend(dev)

   recursive from the subsystem's point of view.  For some subsystems
   that may actually work (e.g. the platform bus type), but for some
   it will fail in a rather spectacular fashion (e.g. PCI).  In each
   case it means a layering violation.

 * Both the subsystem and the driver can provide .suspend_noirq()
   callbacks for system suspend that can do whatever the
   .runtime_suspend() callbacks do just fine, so it really isn't
   necessary to call pm_runtime_suspend() during system suspend.

 * The runtime PM's handling of wakeup devices is usually different
   from the system suspend's one, so .runtime_suspend() may simply be
   inappropriate for system suspend.

 * System suspend is supposed to work even if CONFIG_PM_RUNTIME is
   unset.

 * The runtime PM workqueue is frozen before system suspend, so if
   whatever the driver is going to do during system suspend depends
   on it, that simply won't work.

Still, there is a good reason to allow pm_runtime_resume() to
succeed during system suspend and resume (for instance, some
subsystems and device drivers may legitimately use it to ensure that
their devices are in full-power states before suspending them).
Moreover, there is no reason to prevent runtime PM callbacks from
being executed in parallel with the system suspend/resume .prepare()
and .complete() callbacks and the code removed by commit
e8665002477f0278f84f898145b1f141ba26ee26 went too far in this
respect.  On the other hand, runtime PM callbacks, including
.runtime_resume(), must not be executed during system suspend's
"late" stage of suspending devices and during system resume's "early"
device resume stage.

Taking all of the above into consideration, make the PM core
acquire a runtime PM reference to every device and resume it if
there's a runtime PM resume request pending right before executing
the subsystem-level .suspend() callback for it.  Make the PM core
drop references to all devices right after executing the
subsystem-level .resume() callbacks for them.  Additionally,
make the PM core disable the runtime PM framework for all devices
during system suspend, after executing the subsystem-level .suspend()
callbacks for them, and enable the runtime PM framework for all
devices during system resume, right before executing the
subsystem-level .resume() callbacks for them.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Kevin Hilman <khilman@ti.com>
13 years agoPCI / PM: Detect early wakeup in pci_pm_prepare()
Rafael J. Wysocki [Wed, 6 Jul 2011 08:51:40 +0000 (10:51 +0200)]
PCI / PM: Detect early wakeup in pci_pm_prepare()

A subsequent patch is going to move the invocation of
pm_runtime_barrier() from dpm_prepare() to __device_suspend().
Consequently, early wakeup events resulting from runtime resume
requests for wakeup devices queued up right before system suspend
will only be detected after all of the subsystem-level .prepare()
callbacks have run.  However, the PCI bus type calls
pm_runtime_get_sync() from its pci_pm_prepare() callback routine,
so it would destroy the early wakeup events information regarding PCI
devices.  To prevent this from happening add an early wakeup
detection mechanism, analogous to the one currently in dpm_prepare(),
to pci_pm_prepare().

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
13 years agoPM / Runtime: Return special error code if runtime PM is disabled
Rafael J. Wysocki [Fri, 1 Jul 2011 20:29:15 +0000 (22:29 +0200)]
PM / Runtime: Return special error code if runtime PM is disabled

Some callers of pm_runtime_get_sync() and other runtime PM helper
functions, scsi_autopm_get_host() and scsi_autopm_get_device() in
particular, need to distinguish error codes returned when runtime PM
is disabled (i.e. power.disable_depth is nonzero for the given
device) from error codes returned in other situations.  For this
reason, make the runtime PM helper functions return -EACCES when
power.disable_depth is nonzero and ensure that this error code
won't be returned by them in any other circumstances.  Modify
scsi_autopm_get_host() and scsi_autopm_get_device() to check the
error code returned by pm_runtime_get_sync() and ignore -EACCES.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
13 years agoPM / Runtime: Update documentation of interactions with system sleep
Rafael J. Wysocki [Fri, 1 Jul 2011 20:29:05 +0000 (22:29 +0200)]
PM / Runtime: Update documentation of interactions with system sleep

The documents describing the interactions between runtime PM and
system sleep generally refer to the model in which the system sleep
state is entered through a global firmware or hardware operation.
As a result, some recommendations given in there are not entirely
suitable for systems in which this is not the case.  Update the
documentation to take the existence of those systems into account.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Kevin Hilman <khilman@ti.com>
13 years agoARM: mach-shmobile: sh7372 A3SG support
Magnus Damm [Fri, 1 Jul 2011 20:15:01 +0000 (22:15 +0200)]
ARM: mach-shmobile: sh7372 A3SG support

Add support for the sh7372 A3SG power domain. This domain contains
the SGX hardware block, but there is no open source driver available.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
13 years agoARM: mach-shmobile: sh7372 A3RI support
Magnus Damm [Fri, 1 Jul 2011 20:14:53 +0000 (22:14 +0200)]
ARM: mach-shmobile: sh7372 A3RI support

Add support for the sh7372 A3RI power domain. This domain contains
the ISP hardware block, but there is no driver available.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
13 years agoARM: mach-shmobile: sh7372 A3RV support
Magnus Damm [Fri, 1 Jul 2011 20:14:45 +0000 (22:14 +0200)]
ARM: mach-shmobile: sh7372 A3RV support

Add support for the sh7372 A3RV power domain and hook
up the VPU device.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
13 years agoARM: mach-shmobile: sh7372 A4LC support for AP4EVB
Magnus Damm [Fri, 1 Jul 2011 20:14:34 +0000 (22:14 +0200)]
ARM: mach-shmobile: sh7372 A4LC support for AP4EVB

The AP4EVB board is also using a sh7372 SoC, so tie in
A4LC support on that board as well.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
13 years agoARM / shmobile: Support for I/O power domains for SH7372 (v9)
Rafael J. Wysocki [Fri, 1 Jul 2011 20:13:56 +0000 (22:13 +0200)]
ARM / shmobile: Support for I/O power domains for SH7372 (v9)

Use the generic power domains support introduced by the previous
patch to implement support for power domains on SH7372.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Paul Mundt <lethal@linux-sh.org>
13 years agoPM: Rename clock management functions
Rafael J. Wysocki [Fri, 1 Jul 2011 20:13:44 +0000 (22:13 +0200)]
PM: Rename clock management functions

The common PM clock management functions may be used for system
suspend/resume as well as for runtime PM, so rename them
accordingly.  Modify kerneldoc comments describing these functions
and kernel messages printed by them, so that they refer to power
management in general rather that to runtime PM.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Kevin Hilman <khilman@ti.com>
13 years agoPM: Allow the clocks management code to be used during system suspend
Rafael J. Wysocki [Fri, 1 Jul 2011 20:13:37 +0000 (22:13 +0200)]
PM: Allow the clocks management code to be used during system suspend

The common clocks management code in drivers/base/power/clock_ops.c
is going to be used during system-wide power transitions as well as
for runtime PM, so it shouldn't depend on CONFIG_PM_RUNTIME.
However, the suspend/resume functions provided by it for
CONFIG_PM_RUNTIME unset, to be used during system-wide power
transitions, should not behave in the same way as their counterparts
defined for CONFIG_PM_RUNTIME set, because in that case the clocks
are managed differently at run time.

The names of the functions still contain the word "runtime" after
this change, but that is going to be modified by a separate patch
later.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Kevin Hilman <khilman@ti.com>
13 years agoPM / Domains: Wakeup devices support for system sleep transitions
Rafael J. Wysocki [Fri, 1 Jul 2011 20:13:29 +0000 (22:13 +0200)]
PM / Domains: Wakeup devices support for system sleep transitions

There is the problem how to handle devices set up to wake up the
system from sleep states during system-wide power transitions.
In some cases, those devices can be turned off entirely, because the
wakeup signals will be generated on their behalf anyway.  In some
other cases, they will generate wakeup signals if their clocks are
stopped, but only if power is not removed from them.  Finally, in
some cases, they can only generate wakeup signals if power is not
removed from them and their clocks are enabled.

To allow platform-specific code to decide whether or not to put
wakeup devices (and their PM domains) into low-power state during
system-wide transitions, such as system suspend, introduce a new
generic PM domain callback, .active_wakeup(), that will be used
during the "noirq" phase of system suspend and hibernation (after
image creation) to decide what to do with wakeup devices.
Specifically, if this callback is present and returns "true", the
generic PM domain code will not execute .stop_device() for the
given wakeup device and its PM domain won't be powered off.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Kevin Hilman <khilman@ti.com>
13 years agoPM / Domains: System-wide transitions support for generic domains (v5)
Rafael J. Wysocki [Fri, 1 Jul 2011 20:13:19 +0000 (22:13 +0200)]
PM / Domains: System-wide transitions support for generic domains (v5)

Make generic PM domains support system-wide power transitions
(system suspend and hibernation).  Add suspend, resume, freeze, thaw,
poweroff and restore callbacks to be associated with struct
generic_pm_domain objects and make pm_genpd_init() use them as
appropriate.

The new callbacks do nothing for devices belonging to power domains
that were powered down at run time (before the transition).  For the
other devices the action carried out depends on the type of the
transition.  During system suspend the power domain .suspend()
callback executes pm_generic_suspend() for the device, while the
PM domain .suspend_noirq() callback runs pm_generic_suspend_noirq()
for it, stops it and eventually removes power from the PM domain it
belongs to (after all devices in the domain have been stopped and its
subdomains have been powered off).

During system resume the PM domain .resume_noirq() callback
restores power to the PM domain (when executed for it first time),
starts the device and executes pm_generic_resume_noirq() for it,
while the .resume() callback executes pm_generic_resume() for the
device.  Finally, the .complete() callback executes pm_runtime_idle()
for the device which should put it back into the suspended state if
its runtime PM usage count is equal to zero at that time.

The actions carried out during hibernation and resume from it are
analogous to the ones described above.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Kevin Hilman <khilman@ti.com>
13 years agoPM / Domains: Move code from under #ifdef CONFIG_PM_RUNTIME (v2)
Rafael J. Wysocki [Fri, 1 Jul 2011 20:13:10 +0000 (22:13 +0200)]
PM / Domains: Move code from under #ifdef CONFIG_PM_RUNTIME (v2)

There is some code in drivers/base/power/domain.c that will be useful
for both runtime PM and system-wide power transitions, so make it
depend on CONFIG_PM instead of CONFIG_PM_RUNTIME.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Kevin Hilman <khilman@ti.com>
13 years agoPM: Introduce generic "noirq" callback routines for subsystems (v2)
Rafael J. Wysocki [Fri, 1 Jul 2011 20:12:59 +0000 (22:12 +0200)]
PM: Introduce generic "noirq" callback routines for subsystems (v2)

Introduce generic "noirq" power management callback routines for
subsystems in addition to the "regular" generic PM callback routines.

The new routines will be used, among other things, for implementing
system-wide PM transitions support for generic PM domains.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
13 years agoPM / Domains: Support for generic I/O PM domains (v8)
Rafael J. Wysocki [Fri, 1 Jul 2011 20:12:45 +0000 (22:12 +0200)]
PM / Domains: Support for generic I/O PM domains (v8)

Introduce common headers, helper functions and callbacks allowing
platforms to use simple generic power domains for runtime power
management.

Introduce struct generic_pm_domain to be used for representing
power domains that each contain a number of devices and may be
parent domains or subdomains with respect to other power domains.
Among other things, this structure includes callbacks to be
provided by platforms for performing specific tasks related to
power management (i.e. ->stop_device() may disable a device's
clocks, while ->start_device() may enable them, ->power_off() is
supposed to remove power from the entire power domain
and ->power_on() is supposed to restore it).

Introduce functions that can be used as power domain runtime PM
callbacks, pm_genpd_runtime_suspend() and pm_genpd_runtime_resume(),
as well as helper functions for the initialization of a power
domain represented by a struct generic_power_domain object,
adding a device to or removing a device from it and adding or
removing subdomains.

Introduce configuration option CONFIG_PM_GENERIC_DOMAINS to be
selected by the platforms that want to use the new code.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Reviewed-by: Kevin Hilman <khilman@ti.com>
13 years agoPM: subsys_data in struct dev_pm_info need not depend on RM_RUNTIME
Rafael J. Wysocki [Wed, 22 Jun 2011 23:53:04 +0000 (01:53 +0200)]
PM: subsys_data in struct dev_pm_info need not depend on RM_RUNTIME

The subsys_data field of struct dev_pm_info, introduced by commit
1d2b71f61b6a10216274e27b717becf9ae101fc7 (PM / Runtime: Add subsystem
data field to struct dev_pm_info), is going to be used even if
CONFIG_PM_RUNTIME is not set, so move it from under the #ifdef.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
13 years agoPM / Domains: Rename struct dev_power_domain to struct dev_pm_domain
Rafael J. Wysocki [Wed, 22 Jun 2011 23:52:55 +0000 (01:52 +0200)]
PM / Domains: Rename struct dev_power_domain to struct dev_pm_domain

The naming convention used by commit 7538e3db6e015e890825fbd9f86599b
(PM: Add support for device power domains), which introduced the
struct dev_power_domain type for representing device power domains,
evidently confuses some developers who tend to think that objects
of this type must correspond to "power domains" as defined by
hardware, which is not the case.  Namely, at the kernel level, a
struct dev_power_domain object can represent arbitrary set of devices
that are mutually dependent power management-wise and need not belong
to one hardware power domain.  To avoid that confusion, rename struct
dev_power_domain to struct dev_pm_domain and rename the related
pointers in struct device and struct pm_clk_notifier_block from
pwr_domain to pm_domain.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Kevin Hilman <khilman@ti.com>
13 years agoPM / Runtime: Update documentation regarding driver removal
Rafael J. Wysocki [Sat, 2 Jul 2011 12:27:11 +0000 (14:27 +0200)]
PM / Runtime: Update documentation regarding driver removal

Commit e1866b33b1e89f077b7132daae3dfd9a594e9a1a (PM / Runtime: Rework
runtime PM handling during driver removal) forgot to update the
documentation in Documentation/power/runtime_pm.txt to match the new
code in drivers/base/dd.c.  Update that documentation to match the
code it describes.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Kevin Hilman <khilman@ti.com>
13 years agoPM: Documentation: fix typo: pm_runtime_idle_sync() doesn't exist.
Kevin Hilman [Thu, 30 Jun 2011 22:07:31 +0000 (15:07 -0700)]
PM: Documentation: fix typo: pm_runtime_idle_sync() doesn't exist.

Replace reference to pm_runtime_idle_sync() in the driver core with
pm_runtime_put_sync() which is used in the code.

Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
13 years agoMerge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keith...
Linus Torvalds [Fri, 1 Jul 2011 23:38:59 +0000 (16:38 -0700)]
Merge branch 'drm-intel-fixes' of git://git./linux/kernel/git/keithp/linux-2.6

* 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6:
  drm/i915: apply HWSTAM writes to Ivy Bridge as well
  drm/i915: move IRQ function table init to i915_irq.c
  drm/i915/overlay: Fix unpinning along init error paths
  drm/i915: Don't call describe_obj on NULL pointers
  drm/i915: Hold struct_mutex during i915_save_state/i915_restore_state

13 years agodrm/i915: apply HWSTAM writes to Ivy Bridge as well
Jesse Barnes [Fri, 1 Jul 2011 18:08:56 +0000 (11:08 -0700)]
drm/i915: apply HWSTAM writes to Ivy Bridge as well

In an attempt to fix 38862 and 38863.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Tested-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Keith Packard <keithp@keithp.com>
13 years agoMerge branch 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 1 Jul 2011 20:25:56 +0000 (13:25 -0700)]
Merge branch 'stable/bug.fixes' of git://git./linux/kernel/git/konrad/xen

* 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/pci: Use the INT_SRC_OVR IRQ (instead of GSI) to preset the ACPI SCI IRQ.
  xen/mmu: Fix for linker errors when CONFIG_SMP is not defined.

13 years agoUpdate version number references in README
Jesper Juhl [Fri, 1 Jul 2011 10:46:56 +0000 (12:46 +0200)]
Update version number references in README

When 3.0 is released I believe the README should reflect the new
numbering.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoCREDITS: Fix typo
Henrik Ahlgren [Thu, 30 Jun 2011 22:48:35 +0000 (01:48 +0300)]
CREDITS: Fix typo

David Brownell's CREDITS entry should have N: (name) instead of
M: (email).

Signed-off-by: Henrik Ahlgren <pablo@seestieto.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodrm/radeon/kms: Fix chremap setup on RV770 CE
Alex Deucher [Thu, 30 Jun 2011 12:59:55 +0000 (08:59 -0400)]
drm/radeon/kms: Fix chremap setup on RV770 CE

CE variant requires a different chremap setup.

Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=35472

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Linus Torvalds [Thu, 30 Jun 2011 17:44:52 +0000 (10:44 -0700)]
Merge git://git./linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (24 commits)
  usbnet: Remove over-broad module alias from zaurus.
  MAINTAINERS: drop Michael from bfin_mac driver
  net/can: activate bit-timing calculation and netlink based drivers by default
  rionet: fix NULL pointer dereference in rionet_remove
  net+crypto: Use vmalloc for zlib inflate buffers.
  netfilter: Fix ip_route_me_harder triggering ip_rt_bug
  ipv4: Fix IPsec slowpath fragmentation problem
  ipv4: Fix packet size calculation in __ip_append_data
  cxgb3: skb_record_rx_queue now records the queue index relative to the net_device.
  bridge: Only flood unregistered groups to routers
  qlge: Add maintainer.
  MAINTAINERS: mark socketcan-core lists as subscribers-only
  MAINTAINERS: Remove Sven Eckelmann from BATMAN ADVANCED
  r8169: fix wrong register use.
  net/usb/kalmia: signedness bug in kalmia_bind()
  net/usb: kalmia: Various fixes for better support of non-x86 architectures.
  rtl8192cu: Fix missing firmware load
  udp/recvmsg: Clear MSG_TRUNC flag when starting over for a new packet
  ipv6/udp: Use the correct variable to determine non-blocking condition
  netconsole: fix build when CONFIG_NETCONSOLE_DYNAMIC is turned on
  ...

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt...
Linus Torvalds [Thu, 30 Jun 2011 17:44:13 +0000 (10:44 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/egtvedt/avr32-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/egtvedt/avr32-2.6:
  MAINTAINERS: update AVR32 and AT32AP maintainers

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
Linus Torvalds [Thu, 30 Jun 2011 17:43:57 +0000 (10:43 -0700)]
Merge git://git./linux/kernel/git/wim/linux-2.6-watchdog

* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
  watchdog: update author email for at32ap700x_wdt
  watchdog: gef_wdt: fix MODULE_ALIAS
  watchdog: Intel SCU Watchdog: Fix build and remove duplicate code
  watchdog: mtx1-wdt: fix section mismatch
  watchdog: mtx1-wdt: fix GPIO toggling
  watchdog: mtx1-wdt: request gpio before using it
  watchdog: Handle multiple wm831x watchdogs being registered

13 years agoMerge branch 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 30 Jun 2011 17:43:22 +0000 (10:43 -0700)]
Merge branch 'sh-fixes-for-linus' of git://git./linux/kernel/git/lethal/sh-3.x

* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x:
  sh: use printk_ratelimited instead of printk_ratelimit
  sh: Fix up unmet dependency warnings with USB EHCI/OHCI selects.
  sh: fix the value of sh_dmae_slave_config in setup-sh7757
  sh: fix the INTC vector for IRQ and IRL in setup-sh7757
  sh: add to select the new configuration for USB EHCI/OHCI
  sh: add platform_device of EHCI/OHCI to setup-sh7757
  sh: fix compile error using sh7757lcr_defconfig

13 years agoMerge branch 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 30 Jun 2011 17:43:04 +0000 (10:43 -0700)]
Merge branch 'rmobile-fixes-for-linus' of git://git./linux/kernel/git/lethal/sh-3.x

* 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x:
  ARM: mach-shmobile: make a struct in board-ap4evb.c static
  ARM: mach-shmobile: ag5evm: consistently name sdhi info structures
  ARM: mach-shmobile: mackerel: change usbhs devices order

13 years agoxen/pci: Use the INT_SRC_OVR IRQ (instead of GSI) to preset the ACPI SCI IRQ.
Konrad Rzeszutek Wilk [Thu, 30 Jun 2011 13:18:27 +0000 (09:18 -0400)]
xen/pci: Use the INT_SRC_OVR IRQ (instead of GSI) to preset the ACPI SCI IRQ.

In the past we would use the GSI value to preset the ACPI SCI
IRQ which worked great as GSI == IRQ:

ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)

While that is most often seen, there are some oddities:

ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 20 low level)

which means that GSI 20 (or pin 20) is to be overriden for IRQ 9.
Our code that presets the interrupt for ACPI SCI however would
use the GSI 20 instead of IRQ 9 ending up with:

xen: sci override: global_irq=20 trigger=0 polarity=1
xen: registering gsi 20 triggering 0 polarity 1
xen: --> pirq=20 -> irq=20
xen: acpi sci 20
.. snip..
calling  acpi_init+0x0/0xbc @ 1
ACPI: SCI (IRQ9) allocation failed
ACPI Exception: AE_NOT_ACQUIRED, Unable to install System Control Interrupt handler (20110413/evevent-119)
ACPI: Unable to start the ACPI Interpreter

as the ACPI interpreter made a call to 'acpi_gsi_to_irq' which got nine.
It used that value to request an IRQ (request_irq) and since that was not
present it failed.

The fix is to recognize that for interrupts that are overriden (in our
case we only care about the ACPI SCI) we should use the IRQ number
to present the IRQ instead of the using GSI. End result is that we get:

xen: sci override: global_irq=20 trigger=0 polarity=1
xen: registering gsi 20 triggering 0 polarity 1
xen: --> pirq=20 -> irq=9 (gsi=9)
xen: acpi sci 9

which fixes the ACPI interpreter failing on startup.

CC: stable@kernel.org
Reported-by: Liwei <xieliwei@gmail.com>
Tested-by: Liwei <xieliwei@gmail.com>
[http://lists.xensource.com/archives/html/xen-devel/2011-06/msg01727.html]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
13 years agoxen/mmu: Fix for linker errors when CONFIG_SMP is not defined.
Konrad Rzeszutek Wilk [Thu, 30 Jun 2011 13:12:40 +0000 (09:12 -0400)]
xen/mmu: Fix for linker errors when CONFIG_SMP is not defined.

Simple enough - we use an extern defined symbol which is not
defined when CONFIG_SMP is not defined. This fixes the linker
dying.

CC: stable@kernel.org
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
13 years agoMAINTAINERS: update AVR32 and AT32AP maintainers
Hans-Christian Egtvedt [Tue, 28 Jun 2011 06:43:29 +0000 (08:43 +0200)]
MAINTAINERS: update AVR32 and AT32AP maintainers

This alters the maintenance of the AVR32 architecture and the AT32AP machine
code to be shared between Haavard Skinnemoen and me. The status is also changed
to maintained, as we no longer are being paid to look after this architecture.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Acked-by: Haavard Skinnemoen <hskinnemoen@gmail.com>
13 years agosh: use printk_ratelimited instead of printk_ratelimit
Paul Mundt [Thu, 30 Jun 2011 06:10:06 +0000 (15:10 +0900)]
sh: use printk_ratelimited instead of printk_ratelimit

Follows the powerpc change, for much the same rationale.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
13 years agosh: Fix up unmet dependency warnings with USB EHCI/OHCI selects.
Paul Mundt [Thu, 30 Jun 2011 06:04:38 +0000 (15:04 +0900)]
sh: Fix up unmet dependency warnings with USB EHCI/OHCI selects.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
13 years agoARM: mach-shmobile: make a struct in board-ap4evb.c static
Guennadi Liakhovetski [Wed, 29 Jun 2011 10:13:04 +0000 (10:13 +0000)]
ARM: mach-shmobile: make a struct in board-ap4evb.c static

struct soc_camera_link imx074_link in board-ap4evb.c doesn't have
to be global.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
13 years agodrm/i915: move IRQ function table init to i915_irq.c
Jesse Barnes [Tue, 28 Jun 2011 20:00:41 +0000 (13:00 -0700)]
drm/i915: move IRQ function table init to i915_irq.c

This lets us make the various IRQ functions static and helps avoid
problems like the one fixed in "drm/i915: Use chipset-specific irq
installers" where one of the exported functions was called rather than
the chipset specific version.

This also fixes a UMS-mode bug -- the correct irq functions for IRL
and later chips were only getting loaded in the KMS path.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Keith Packard <keithp@keithp.com>
13 years agodrm/i915/overlay: Fix unpinning along init error paths
Chris Wilson [Tue, 28 Jun 2011 10:27:47 +0000 (11:27 +0100)]
drm/i915/overlay: Fix unpinning along init error paths

As pointed out by Dan Carpenter, it was seemingly possible to hit an error
whilst mapping the buffer for the regs (except the only likely error
returns should not happen during init) and so leak a pin count on the
bo. To handle this we would need to reacquire the struct mutex, so for
simplicity rearrange for the lock to be held for the entire function.
For extra pedagogy, test that we only call init once.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
13 years agoMerge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
Linus Torvalds [Thu, 30 Jun 2011 01:18:48 +0000 (18:18 -0700)]
Merge branch 'drm-fixes' of git://git./linux/kernel/git/airlied/drm-2.6

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm/radeon/kms: increase rom size for atrm method

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Thu, 30 Jun 2011 01:10:54 +0000 (18:10 -0700)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: caam - fix operator precedence in shared descriptor allocation

13 years agodrm/radeon/kms: increase rom size for atrm method
Alex Deucher [Fri, 24 Jun 2011 13:15:38 +0000 (13:15 +0000)]
drm/radeon/kms: increase rom size for atrm method

The vbios rom is >64k on a lot of modern asics.  Increase
the fetch size for atrm to make sure we don't miss part
of a larger rom.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
13 years agocrypto: caam - fix operator precedence in shared descriptor allocation
Kim Phillips [Thu, 26 May 2011 03:30:34 +0000 (13:30 +1000)]
crypto: caam - fix operator precedence in shared descriptor allocation

setkey allocates 16 bytes (CAAM_CMD_SZ *
DESC_AEAD_SHARED_TEXT_LEN) shy of what is needed to
store the shared descriptor, resulting in memory
corruption.  Fix this.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
13 years agodrm/i915: Don't call describe_obj on NULL pointers
Ben Widawsky [Wed, 29 Jun 2011 18:41:51 +0000 (11:41 -0700)]
drm/i915: Don't call describe_obj on NULL pointers

Reported-by: Pavel Roskin <proski@gnu.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=38777
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Keith Packard <keithp@keithp.com>
13 years agodrm/i915: Hold struct_mutex during i915_save_state/i915_restore_state
Keith Packard [Wed, 29 Jun 2011 07:30:34 +0000 (00:30 -0700)]
drm/i915: Hold struct_mutex during i915_save_state/i915_restore_state

Lots of register access in these functions, some of which requires the
struct mutex.

These functions now hold the struct mutex across the calls to
i915_save_display and i915_restore_display, and so the internal mutex
calls in those functions have been removed. To ensure that no-one else
was calling them (and hence violating the new required locking
invarient), those functions have been made static.

gen6_enable_rps locks the struct mutex, and so i915_restore_state
unlocks the mutex around calls to that function.

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Keith Packard <keithp@keithp.com>
13 years agoMerge branch 'kvm-updates/3.0' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Wed, 29 Jun 2011 18:07:20 +0000 (11:07 -0700)]
Merge branch 'kvm-updates/3.0' of git://git./virt/kvm/kvm

* 'kvm-updates/3.0' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86 emulator: fix %rip-relative addressing with immediate source operand

13 years agoMerge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvar...
Linus Torvalds [Wed, 29 Jun 2011 18:07:02 +0000 (11:07 -0700)]
Merge branch 'i2c-for-linus' of git://git./linux/kernel/git/jdelvare/staging

* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  i2c/pca954x: Initialize the mux to disconnected state
  i2c-taos-evm: Fix log messages

13 years agoMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Linus Torvalds [Wed, 29 Jun 2011 18:03:27 +0000 (11:03 -0700)]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  arch/powerpc: use printk_ratelimited instead of printk_ratelimit
  powerpc/rtas-rtc: remove sideeffects of printk_ratelimit
  powerpc/pseries: remove duplicate SCSI_BNX2_ISCSI in pseries_defconfig
  powerpc/e500: fix breakage with fsl_rio_mcheck_exception
  powerpc/p1022ds: fix audio-related properties in the device tree
  powerpc/85xx: fix NAND_CMD_READID read bytes number

13 years agoahci: change 'masking port_map' printk to KERN_WARNING level
Linus Torvalds [Wed, 29 Jun 2011 17:10:07 +0000 (10:10 -0700)]
ahci: change 'masking port_map' printk to KERN_WARNING level

It's not so much an error as a warning about normal Marvell crazines.
So don't use KERN_ERR that ends up spamming the console even in quiet
mode, it's not _that_ critical.

Explained by Jeff:

 "Long explanation, it's a mess:

  Marvell took standard AHCI, and bastardized it to include a weird mode
  whereby PATA devices appear inside the AHCI DMA and interrupt
  infrastructure you're familiar with.

  So, PATA devices appear via pata_marvell driver, using basic legacy
  IDE programming interface.  But SATA devices, which might also be
  attached to this chip, either work in under-performing mode or
  simply don't work at all (e.g.  newer 6 Gbps devices or port
  multiplier attachments, NCQ, ...)

  On the other hand, 'ahci' driver loads and works with the chip's
  attached SATA devices quite beautifully, but is completely unable to
  drive any attached PATA devices, due to the Marvell-specific
  PATA-under-AHCI interface.

  The "masking port_map 0x7 -> 0x3" message is the ahci driver "hiding"
  the PATA port(s) from itself, making sure it will only drive the SATA
  ports it knows how to drive."

Acked-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agousbnet: Remove over-broad module alias from zaurus.
Dave Jones [Sat, 18 Jun 2011 00:02:10 +0000 (20:02 -0400)]
usbnet: Remove over-broad module alias from zaurus.

This module and a bunch of dependancies are getting loaded on several
of laptops I have (probably picking up the mobile broadband device),
that have nothing to do with zaurus. Matching by class without
any vendor/device pair isn't the right thing to do here, as it
will prevent any other driver from correctly binding to it.
(Or in the absense of a driver, will just waste time & memory by
 unnecessarily loading modules)

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agoMAINTAINERS: drop Michael from bfin_mac driver
Mike Frysinger [Mon, 27 Jun 2011 08:24:07 +0000 (08:24 +0000)]
MAINTAINERS: drop Michael from bfin_mac driver

We want people to just use the list now rather than hitting up people
who are no longer responsible for it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agonet/can: activate bit-timing calculation and netlink based drivers by default
Marc Kleine-Budde [Sun, 26 Jun 2011 21:39:51 +0000 (21:39 +0000)]
net/can: activate bit-timing calculation and netlink based drivers by default

The two options "CAN bit-timing calculation" and
"Platform CAN drivers with Netlink support" have a "default Y". In order to
activate them by default, change to "default y".

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Acked-by: Kurt Van Dijck <kurt.van.dijck@eia.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agorionet: fix NULL pointer dereference in rionet_remove
Yinglin Luan [Sat, 25 Jun 2011 18:12:12 +0000 (18:12 +0000)]
rionet: fix NULL pointer dereference in rionet_remove

Function rionet_remove initializes local variable 'ndev' to NULL
and do nothing changes before the call to unregister_netdev(ndev),
this could cause a NULL pointer dereference.

Reported-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Yinglin Luan <synmyth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agonet+crypto: Use vmalloc for zlib inflate buffers.
David S. Miller [Wed, 29 Jun 2011 12:48:41 +0000 (05:48 -0700)]
net+crypto: Use vmalloc for zlib inflate buffers.

They are 64K and result in order-4 allocations, even with SLUB.

Therefore, just like we always have for the deflate buffers, use
vmalloc.

Reported-by: Martin Jackson <mjackson220.list@gmail.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agonetfilter: Fix ip_route_me_harder triggering ip_rt_bug
Julian Anastasov [Sat, 18 Jun 2011 07:53:59 +0000 (07:53 +0000)]
netfilter: Fix ip_route_me_harder triggering ip_rt_bug

Avoid creating input routes with ip_route_me_harder.
It does not work for locally generated packets. Instead,
restrict sockets to provide valid saddr for output route (or
unicast saddr for transparent proxy). For other traffic
allow saddr to be unicast or local but if callers forget
to check saddr type use 0 for the output route.

The resulting handling should be:

- REJECT TCP:
- in INPUT we can provide addr_type = RTN_LOCAL but
better allow rejecting traffic delivered with
local route (no IP address => use RTN_UNSPEC to
allow also RTN_UNICAST).
- FORWARD: RTN_UNSPEC => allow RTN_LOCAL/RTN_UNICAST
saddr, add fix to ignore RTN_BROADCAST and RTN_MULTICAST
- OUTPUT: RTN_UNSPEC

- NAT, mangle, ip_queue, nf_ip_reroute: RTN_UNSPEC in LOCAL_OUT

- IPVS:
- use RTN_LOCAL in LOCAL_OUT and FORWARD after SNAT
to restrict saddr to be local

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agoi2c/pca954x: Initialize the mux to disconnected state
Petri Gynther [Wed, 29 Jun 2011 09:36:11 +0000 (11:36 +0200)]
i2c/pca954x: Initialize the mux to disconnected state

pca954x power-on default is channel 0 connected. If multiple pca954x
muxes are connected to the same physical I2C bus, the parent bus will
see channel 0 devices behind both muxes by default. This is bad.

Scenario:
            -- pca954x @ 0x70 -- ch 0 (I2C-bus-101) -- EEPROM @ 0x50
            |
I2C-bus-1 ---
            |
            -- pca954x @ 0x71 -- ch 0 (I2C-bus-111) -- EEPROM @ 0x50

1. Load I2C bus driver: creates I2C-bus-1
2. Load pca954x driver: creates virtual I2C-bus-101 and I2C-bus-111
3. Load eeprom driver
4. Try to read EEPROM @ 0x50 on I2C-bus-101. The transaction will also bleed
   onto I2C-bus-111 because pca954x @ 0x71 channel 0 is connected by default.

Fix: Initialize pca954x to disconnected state in pca954x_probe()

Signed-off-by: Petri Gynther <pgynther@google.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
13 years agoi2c-taos-evm: Fix log messages
Jean Delvare [Wed, 29 Jun 2011 09:36:10 +0000 (11:36 +0200)]
i2c-taos-evm: Fix log messages

* Print all error and information messages even when debugging is
  disabled.
* Don't use adapter device to log messages before it is ready.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
13 years agosh: fix the value of sh_dmae_slave_config in setup-sh7757
Yoshihiro Shimoda [Wed, 29 Jun 2011 04:23:42 +0000 (04:23 +0000)]
sh: fix the value of sh_dmae_slave_config in setup-sh7757

Fix the value of chcr for SCIF[2-4]_RX and RIIC[0-9]_RX and
the value of mid_rid for some RIIC.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
13 years agosh: fix the INTC vector for IRQ and IRL in setup-sh7757
Yoshihiro Shimoda [Wed, 29 Jun 2011 04:23:47 +0000 (04:23 +0000)]
sh: fix the INTC vector for IRQ and IRL in setup-sh7757

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
13 years agoKVM: x86 emulator: fix %rip-relative addressing with immediate source operand
Avi Kivity [Sun, 19 Jun 2011 16:21:11 +0000 (19:21 +0300)]
KVM: x86 emulator: fix %rip-relative addressing with immediate source operand

%rip-relative addressing is relative to the first byte of the next instruction,
so we need to add %rip only after we've fetched any immediate bytes.

Based on original patch by Li Xin <xin.li@intel.com>.

Signed-off-by: Avi Kivity <avi@redhat.com>
Acked-by: Li Xin <xin.li@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years agoarch/powerpc: use printk_ratelimited instead of printk_ratelimit
Christian Dietrich [Sat, 4 Jun 2011 05:36:54 +0000 (05:36 +0000)]
arch/powerpc: use printk_ratelimited instead of printk_ratelimit

Since printk_ratelimit() shouldn't be used anymore (see comment in
include/linux/printk.h), replace it with printk_ratelimited.

Signed-off-by: Christian Dietrich <christian.dietrich@informatik.uni-erlangen.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
13 years agopowerpc/rtas-rtc: remove sideeffects of printk_ratelimit
Christian Dietrich [Sat, 4 Jun 2011 05:35:47 +0000 (05:35 +0000)]
powerpc/rtas-rtc: remove sideeffects of printk_ratelimit

Don't use printk_ratelimit() as an additional condition for returning
on an error. Because when the ratelimit is reached, printk_ratelimit
will return 0 and e.g. in rtas_get_boot_time won't check for an error
condition.

Signed-off-by: Christian Dietrich <christian.dietrich@informatik.uni-erlangen.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
13 years agopowerpc/pseries: remove duplicate SCSI_BNX2_ISCSI in pseries_defconfig
Michael Neuling [Mon, 27 Jun 2011 19:55:30 +0000 (19:55 +0000)]
powerpc/pseries: remove duplicate SCSI_BNX2_ISCSI in pseries_defconfig

Remove duplicate assignment of SCSI_BNX2_ISCSI in pseries_defconfig
introduced by:
  37e0c21e powerpc/pseries: Enable iSCSI support for a number of cards

causes warning:
arch/powerpc/configs/pseries_defconfig:151:warning: override: reassigning to symbol SCSI_BNX2_ISCSI

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
13 years agowatchdog: update author email for at32ap700x_wdt
Hans-Christian Egtvedt [Tue, 28 Jun 2011 15:01:14 +0000 (17:01 +0200)]
watchdog: update author email for at32ap700x_wdt

This patch updates the email address of the at32ap700x_wdt driver supported by
me to an email account I will use on a more regular basis in the future.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
13 years agoMerge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keith...
Linus Torvalds [Tue, 28 Jun 2011 18:15:57 +0000 (11:15 -0700)]
Merge branch 'drm-intel-fixes' of git://git./linux/kernel/git/keithp/linux-2.6

* 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6:
  drm/i915: Use chipset-specific irq installers
  drm/i915: forcewake fix after reset
  drm/i915: add Ivy Bridge page flip support
  drm/i915: split page flip queueing into per-chipset functions

13 years agoMerge branch 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Tue, 28 Jun 2011 18:15:36 +0000 (11:15 -0700)]
Merge branch 'driver-core-linus' of git://git./linux/kernel/git/gregkh/driver-core-2.6

* 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
  Connector: Correctly set the error code in case of success when dispatching receive callbacks
  Connector: Set the CN_NETLINK_USERS correctly
  pti: PTI semantics fix in pti_tty_cleanup.
  pti: ENXIO error case memory leak PTI fix.
  pti: double-free security PTI fix
  drivers:misc: ti-st: fix skipping of change remote baud
  drivers/base/platform.c: don't mark platform_device_register_resndata() as __init_or_module
  st_kim: Handle case of no device found for ID 0
  firmware: fix GOOGLE_SMI kconfig dependency warning

13 years agoMerge branch 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Tue, 28 Jun 2011 18:15:17 +0000 (11:15 -0700)]
Merge branch 'usb-linus' of git://git./linux/kernel/git/gregkh/usb-2.6

* 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
  MAINTAINERS: add myself as maintainer of USB/IP
  usb: r8a66597-hcd: fix cannot detect low/full speed device
  USB: ehci-ath79: fix a NULL pointer dereference
  USB: Add new FT232H chip to drivers/usb/serial/ftdi_sio.c
  usb/isp1760: Fix bug preventing the unlinking of control urbs
  USB: Fix up URB error codes to reflect implementation.
  xhci: Always set urb->status to zero for isoc endpoints.
  xhci: Add reset on resume quirk for asrock p67 host
  xHCI 1.0: Incompatible Device Error
  USB: don't let errors prevent system sleep
  USB: don't let the hub driver prevent system sleep
  USB: change maintainership of ohci-hcd and ehci-hcd
  xHCI 1.0: Force Stopped Event(FSE)
  xhci: Don't warn about zeroed bMaxBurst descriptor field.
  USB: Free bandwidth when usb_disable_device is called.
  xhci: Reject double add of active endpoints.
  USB: TI 3410/5052 USB Serial Driver: Fix mem leak when firmware is too big.
  usb: musb: gadget: clear TXPKTRDY flag when set FLUSHFIFO
  usb: musb: host: compare status for negative error values

13 years agoMerge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Tue, 28 Jun 2011 18:14:55 +0000 (11:14 -0700)]
Merge branch 'tty-linus' of git://git./linux/kernel/git/gregkh/tty-2.6

* 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
  serial: bcm63xx_uart: fix irq storm after rx fifo overrun.
  amba pl011: platform data for reg lockup and glitch v2
  amba pl011: workaround for uart registers lockup
  tty: n_gsm: improper skb_pull() use was leaking framed data
  tty: n_gsm: Fixed logic to decode break signal from modem status
  TTY: ntty, add one more sanity check
  TTY: ldisc, do not close until there are readers
  8250: Fix capabilities when changing the port type
  8250_pci: Fix missing const from merges
  ARM: SAMSUNG: serial: Fix on handling of one clock source for UART
  serial: ioremap warning fix for jsm driver.
  8250_pci: add -ENODEV code for Intel EG20T PCH

13 years agoMerge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Tue, 28 Jun 2011 18:14:22 +0000 (11:14 -0700)]
Merge branch 'staging-linus' of git://git./linux/kernel/git/gregkh/staging-2.6

* 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6:
  Staging: comedi: fix build breakages on some platforms
  Staging: brcm80211: disable drivers except for X86 or MIPS platforms
  Staging: brcm80211: disable drivers for PPC platforms
  Staging: iio: Make IIO depend on GENERIC_HARDIRQS
  Staging: mei: fix suspend failure
  Staging: fix iio builds when IIO_RING_BUFFER is not enabled
  Staging: Comedi: Build only on arches providing PAGE_KERNEL_NOCACHE
  Staging: fix more iio builds when IIO_RING_BUFFER is not enabled

13 years agoMerge branch 'for-linus' of git://neil.brown.name/md
Linus Torvalds [Tue, 28 Jun 2011 18:14:00 +0000 (11:14 -0700)]
Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  md: avoid endless recovery loop when waiting for fail device to complete.

13 years agodrm/i915: Use chipset-specific irq installers
Chris Wilson [Tue, 28 Jun 2011 10:48:51 +0000 (11:48 +0100)]
drm/i915: Use chipset-specific irq installers

Konstantin Belousov pointed out that 4697995b98417 replaced the generic
i915_driver_irq_*install() functions with chipset specific routines
accessible only through driver->irq_*install(). So update the sanity
check in i915_request_wait() to match.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Keith Packard <keithp@keithp.com>
13 years agodrm/i915: forcewake fix after reset
Ben Widawsky [Fri, 24 Jun 2011 21:31:47 +0000 (14:31 -0700)]
drm/i915: forcewake fix after reset

The failure is as follows:

1. Userspace gets forcewake lock, lock count >=1
2. GPU hang/reset occurs (forcewake bit is reset)
3. count is now incorrect

The failure can only occur when using the forcewake userspace lock.

This has the unfortunate consequence of messing up the driver as well as
userspace, unless userspace closes the debugfs file, the kernel will
never end up waking the GT since the refcount will be > 1.

The solution is to try to recover the correct forcewake state based on
the refcount. There is a period of time where userspace reads/writes may
occur after the reset, before the GT has been forcewaked. The interface
was never designed to be a perfect solution for userspace reads/writes,
and the kernel portion is fixed by this patch.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Keith Packard <keithp@keithp.com>
13 years agoproc: restrict access to /proc/PID/io
Vasiliy Kulikov [Fri, 24 Jun 2011 12:08:38 +0000 (16:08 +0400)]
proc: restrict access to /proc/PID/io

/proc/PID/io may be used for gathering private information.  E.g.  for
openssh and vsftpd daemons wchars/rchars may be used to learn the
precise password length.  Restrict it to processes being able to ptrace
the target process.

ptrace_may_access() is needed to prevent keeping open file descriptor of
"io" file, executing setuid binary and gathering io information of the
setuid'ed process.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agowatchdog: gef_wdt: fix MODULE_ALIAS
Axel Lin [Mon, 27 Jun 2011 14:37:16 +0000 (22:37 +0800)]
watchdog: gef_wdt: fix MODULE_ALIAS

Remove the space between "platform:" prefix and the driver name.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Martyn Welch <martyn.welch@ge.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
13 years agowatchdog: Intel SCU Watchdog: Fix build and remove duplicate code
Jesper Juhl [Thu, 26 May 2011 09:12:53 +0000 (11:12 +0200)]
watchdog: Intel SCU Watchdog: Fix build and remove duplicate code

Trying to build the Intel SCU Watchdog fails for me with gcc 4.6.0 -
$ gcc --version | head -n 1
gcc (GCC) 4.6.0 20110513 (prerelease)

like this :
  CC      drivers/watchdog/intel_scu_watchdog.o
In file included from drivers/watchdog/intel_scu_watchdog.c:49:0:
/home/jj/src/linux-2.6/arch/x86/include/asm/apb_timer.h: In function ‘apbt_time_init’:
/home/jj/src/linux-2.6/arch/x86/include/asm/apb_timer.h:65:42: warning: ‘return’ with a value, in function returning void [enabled by default]
drivers/watchdog/intel_scu_watchdog.c: In function ‘intel_scu_watchdog_init’:
drivers/watchdog/intel_scu_watchdog.c:468:2: error: implicit declaration of function ‘sfi_get_mtmr’ [-Werror=implicit-function-declaration]
drivers/watchdog/intel_scu_watchdog.c:468:32: warning: assignment makes pointer from integer without a cast [enabled by default]
cc1: some warnings being treated as errors

make[1]: *** [drivers/watchdog/intel_scu_watchdog.o] Error 1
make: *** [drivers/watchdog/intel_scu_watchdog.o] Error 2

Additionally, linux/types.h is needlessly being included twice in
drivers/watchdog/intel_scu_watchdog.c

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
13 years agowatchdog: mtx1-wdt: fix section mismatch
Florian Fainelli [Wed, 15 Jun 2011 17:15:52 +0000 (19:15 +0200)]
watchdog: mtx1-wdt: fix section mismatch

Fix section mismatch and remove unused variable 'tmp'.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
13 years agowatchdog: mtx1-wdt: fix GPIO toggling
Florian Fainelli [Wed, 15 Jun 2011 17:15:41 +0000 (19:15 +0200)]
watchdog: mtx1-wdt: fix GPIO toggling

Commit e391be76 (MIPS: Alchemy: Clean up GPIO registers and accessors)
changed the way the GPIO was toggled. Prior to this patch, we would
always actively drive the GPIO output to either 0 or 1, this patch
drove the GPIO active to 0, and put the GPIO in tristate to drive it
to 1, unfortunately this does not work, revert back to active driving.

Using a signed variable (gstate) to hold the gpio state and using a bit-
wise operation on it also resulted in toggling value from 1 to -2 since
the variable is signed. This value was then passed on to gpio_direction_
output, which always perform a if (value) ... to set the value to the
gpio, so we were always writing a 1 to this GPIO instead of 1 -> 0 -> 1 ...

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable <stable@kernel.org>
13 years agowatchdog: mtx1-wdt: request gpio before using it
Florian Fainelli [Wed, 15 Jun 2011 17:15:23 +0000 (19:15 +0200)]
watchdog: mtx1-wdt: request gpio before using it

Otherwise, the gpiolib autorequest feature will produce a WARN_ON():

WARNING: at drivers/gpio/gpiolib.c:101 0x8020ec6c()
autorequest GPIO-215
[...]

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable <stable@kernel.org>
13 years agowatchdog: Handle multiple wm831x watchdogs being registered
Mark Brown [Tue, 31 May 2011 13:46:55 +0000 (14:46 +0100)]
watchdog: Handle multiple wm831x watchdogs being registered

Due to the whole single instance based watchdog API we use static data
for the wm831x watchdog which means that if the system tries to register
a second one we end up trying to register the same miscdevice again,
corrupting the miscdevice list. Work around this by checking for duplicate
registrations until we get a watchdog core.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
13 years agomd: avoid endless recovery loop when waiting for fail device to complete.
NeilBrown [Tue, 28 Jun 2011 06:59:42 +0000 (16:59 +1000)]
md: avoid endless recovery loop when waiting for fail device to complete.

If a device fails in a way that causes pending request to take a while
to complete, md will not be able to immediately remove it from the
array in remove_and_add_spares.
It will then incorrectly look like a spare device and md will try to
recover it even though it is failed.
This leads to a recovery process starting and instantly aborting over
and over again.

We should check if the device is faulty before considering it to be a
spare.  This will avoid trying to start a recovery that cannot
proceed.

This bug was introduced in 2.6.26 so that patch is suitable for any
kernel since then.

Cc: stable@kernel.org
Reported-by: Jim Paradis <james.paradis@stratus.com>
Signed-off-by: NeilBrown <neilb@suse.de>
13 years agoipv4: Fix IPsec slowpath fragmentation problem
Steffen Klassert [Wed, 22 Jun 2011 01:05:37 +0000 (01:05 +0000)]
ipv4: Fix IPsec slowpath fragmentation problem

ip_append_data() builds packets based on the mtu from dst_mtu(rt->dst.path).
On IPsec the effective mtu is lower because we need to add the protocol
headers and trailers later when we do the IPsec transformations. So after
the IPsec transformations the packet might be too big, which leads to a
slowpath fragmentation then. This patch fixes this by building the packets
based on the lower IPsec mtu from dst_mtu(&rt->dst) and adapts the exthdr
handling to this.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agoipv4: Fix packet size calculation in __ip_append_data
Steffen Klassert [Wed, 22 Jun 2011 01:04:37 +0000 (01:04 +0000)]
ipv4: Fix packet size calculation in __ip_append_data

Git commit 59104f06 (ip: take care of last fragment in ip_append_data)
added a check to see if we exceed the mtu when we add trailer_len.
However, the mtu is already subtracted by the trailer length when the
xfrm transfomation bundles are set up. So IPsec packets with mtu
size get fragmented, or if the DF bit is set the packets will not
be send even though they match the mtu perfectly fine. This patch
actually reverts commit 59104f06.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 years agoLinux 3.0-rc5
Linus Torvalds [Tue, 28 Jun 2011 02:12:22 +0000 (19:12 -0700)]
Linux 3.0-rc5

13 years agodrm/i915: more struct_mutex locking
Hugh Dickins [Mon, 27 Jun 2011 23:18:20 +0000 (16:18 -0700)]
drm/i915: more struct_mutex locking

When auditing the locking in i915_gem.c (for a prospective change which
I then abandoned), I noticed two places where struct_mutex is not held
across GEM object manipulations that would usually require it.

Since one is in initial setup and the other in driver unload, I'm
guessing the mutex is not required for either; but post a patch in case
it is.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Keith Packard <keithp@keithp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodrm/i915: use shmem_truncate_range
Hugh Dickins [Mon, 27 Jun 2011 23:18:19 +0000 (16:18 -0700)]
drm/i915: use shmem_truncate_range

The interface to ->truncate_range is changing very slightly: once "tmpfs:
take control of its truncate_range" has been applied, this can be applied.
 For now there is only a slight inefficiency while this remains unapplied,
but it will soon become essential for managing shmem's use of swap.

Change i915_gem_object_truncate() to use shmem_truncate_range() directly:
which should also spare i915 later change if we switch from
inode_operations->truncate_range to file_operations->fallocate.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Keith Packard <keithp@keithp.com>
Cc: Dave Airlie <airlied@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodrm/i915: use shmem_read_mapping_page
Hugh Dickins [Mon, 27 Jun 2011 23:18:18 +0000 (16:18 -0700)]
drm/i915: use shmem_read_mapping_page

Soon tmpfs will stop supporting ->readpage and read_cache_page_gfp(): once
"tmpfs: add shmem_read_mapping_page_gfp" has been applied, this patch can
be applied to ease the transition.

Make i915_gem_object_get_pages_gtt() use shmem_read_mapping_page_gfp() in
the one place it's needed; elsewhere use shmem_read_mapping_page(), with
the mapping's gfp_mask properly initialized.

Forget about __GFP_COLD: since tmpfs initializes its pages with memset,
asking for a cold page is counter-productive.

Include linux/shmem_fs.h also in drm_gem.c: with shmem_file_setup() now
declared there too, we shall remove the prototype from linux/mm.h later.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Keith Packard <keithp@keithp.com>
Cc: Dave Airlie <airlied@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodrm/ttm: use shmem_read_mapping_page
Hugh Dickins [Mon, 27 Jun 2011 23:18:17 +0000 (16:18 -0700)]
drm/ttm: use shmem_read_mapping_page

Soon tmpfs will stop supporting ->readpage and read_mapping_page(): once
"tmpfs: add shmem_read_mapping_page_gfp" has been applied, this patch can
be applied to ease the transition.

ttm_tt_swapin() and ttm_tt_swapout() use shmem_read_mapping_page() in
place of read_mapping_page(), since their swap_space has been created with
shmem_file_setup().

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: Dave Airlie <airlied@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodrivers/tty/serial/8250_pci.c: fix warning
Andrew Morton [Mon, 27 Jun 2011 23:18:16 +0000 (16:18 -0700)]
drivers/tty/serial/8250_pci.c: fix warning

Fis the warning

  drivers/tty/serial/8250_pci.c:1457: warning: initialization from incompatible pointer type

Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodrivers/misc/ioc4.c: fix section mismatch / race condition
Ralf Baechle [Mon, 27 Jun 2011 23:18:15 +0000 (16:18 -0700)]
drivers/misc/ioc4.c: fix section mismatch / race condition

Fix this section mismatch:

  WARNING: drivers/misc/ioc4.o(.data+0x144): Section mismatch in reference from the variable ioc4_load_modules_work to the function .devinit.text:ioc4_load_modules()
  The variable ioc4_load_modules_work references
  the function __devinit ioc4_load_modules()
  If the reference is valid then annotate the
  variable with __init* or __refdata (see linux/init.h) or name the variable:
  *driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console

This one is potentially fatal; by the time ioc4_load_modules is invoked
it may already have been freed.  For that reason ioc4_load_modules_work
can't be turned to __devinitdata but also because it's referenced in
ioc4_exit.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Brent Casavant <bcasavan@sgi.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodrivers/leds/leds-lp5523.c: fix section mismatches
Ralf Baechle [Mon, 27 Jun 2011 23:18:14 +0000 (16:18 -0700)]
drivers/leds/leds-lp5523.c: fix section mismatches

Fix this section mismatch:

  WARNING: drivers/leds/leds-lp5523.o(.text+0x12f4): Section mismatch in reference from the function lp5523_probe() to the function .init.text:lp5523_init_led()
  The function lp5523_probe() references
  the function __init lp5523_init_led().
  This is often because lp5523_probe lacks a __init
  annotation or the annotation of lp5523_init_led is wrong.

Fixing this one triggers one more mismatch, fix that one as well.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodrivers/leds/leds-lp5521.c: fix section mismatches
Ralf Baechle [Mon, 27 Jun 2011 23:18:13 +0000 (16:18 -0700)]
drivers/leds/leds-lp5521.c: fix section mismatches

Fix this section mismatch:

  WARNING: drivers/leds/leds-lp5521.o(.text+0xf2c): Section mismatch in reference from the function lp5521_probe() to the function .init.text:lp5521_init_led()
  The function lp5521_probe() references
  the function __init lp5521_init_led().
  This is often because lp5521_probe lacks a __init
  annotation or the annotation of lp5521_init_led is wrong.

Fixing this mismatch triggers one more mismatch, fix that one as well.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agomemcg: fix direct softlimit reclaim to be called in limit path
KAMEZAWA Hiroyuki [Mon, 27 Jun 2011 23:18:12 +0000 (16:18 -0700)]
memcg: fix direct softlimit reclaim to be called in limit path

Commit d149e3b25d7c ("memcg: add the soft_limit reclaim in global direct
reclaim") adds a softlimit hook to shrink_zones().  By this, soft limit
is called as

   try_to_free_pages()
       do_try_to_free_pages()
           shrink_zones()
               mem_cgroup_soft_limit_reclaim()

Then, direct reclaim is memcg softlimit hint aware, now.

But, the memory cgroup's "limit" path can call softlimit shrinker.

   try_to_free_mem_cgroup_pages()
       do_try_to_free_pages()
           shrink_zones()
               mem_cgroup_soft_limit_reclaim()

This will cause a global reclaim when a memcg hits limit.

This is bug. soft_limit_reclaim() should be called when
scanning_global_lru(sc) == true.

And the commit adds a variable "total_scanned" for counting softlimit
scanned pages....it's not "total".  This patch removes the variable and
update sc->nr_scanned instead of it.  This will affect shrink_slab()'s
scan condition but, global LRU is scanned by softlimit and I think this
change makes sense.

TODO: avoid too much scanning of a zone when softlimit did enough work.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Ying Han <yinghan@google.com>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agotaskstats: don't allow duplicate entries in listener mode
Vasiliy Kulikov [Mon, 27 Jun 2011 23:18:11 +0000 (16:18 -0700)]
taskstats: don't allow duplicate entries in listener mode

Currently a single process may register exit handlers unlimited times.
It may lead to a bloated listeners chain and very slow process
terminations.

Eg after 10KK sent TASKSTATS_CMD_ATTR_REGISTER_CPUMASKs ~300 Mb of
kernel memory is stolen for the handlers chain and "time id" shows 2-7
seconds instead of normal 0.003.  It makes it possible to exhaust all
kernel memory and to eat much of CPU time by triggerring numerous exits
on a single CPU.

The patch limits the number of times a single process may register
itself on a single CPU to one.

One little issue is kept unfixed - as taskstats_exit() is called before
exit_files() in do_exit(), the orphaned listener entry (if it was not
explicitly deregistered) is kept until the next someone's exit() and
implicit deregistration in send_cpu_listeners().  So, if a process
registered itself as a listener exits and the next spawned process gets
the same pid, it would inherit taskstats attributes.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agomm: fix assertion mapping->nrpages == 0 in end_writeback()
Jan Kara [Mon, 27 Jun 2011 23:18:10 +0000 (16:18 -0700)]
mm: fix assertion mapping->nrpages == 0 in end_writeback()

Under heavy memory and filesystem load, users observe the assertion
mapping->nrpages == 0 in end_writeback() trigger.  This can be caused by
page reclaim reclaiming the last page from a mapping in the following
race:

CPU0 CPU1
  ...
  shrink_page_list()
    __remove_mapping()
      __delete_from_page_cache()
        radix_tree_delete()
evict_inode()
  truncate_inode_pages()
    truncate_inode_pages_range()
      pagevec_lookup() - finds nothing
  end_writeback()
    mapping->nrpages != 0 -> BUG
        page->mapping = NULL
        mapping->nrpages--

Fix the problem by doing a reliable check of mapping->nrpages under
mapping->tree_lock in end_writeback().

Analyzed by Jay <jinshan.xiong@whamcloud.com>, lost in LKML, and dug out
by Miklos Szeredi <mszeredi@suse.de>.

Cc: Jay <jinshan.xiong@whamcloud.com>
Cc: Miklos Szeredi <mszeredi@suse.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agomm/memory-failure.c: fix spinlock vs mutex order
Peter Zijlstra [Mon, 27 Jun 2011 23:18:09 +0000 (16:18 -0700)]
mm/memory-failure.c: fix spinlock vs mutex order

We cannot take a mutex while holding a spinlock, so flip the order and
fix the locking documentation.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodrivers/misc/lkdtm.c: fix race when crashpoint is hit multiple times before checking...
Josh Hunt [Mon, 27 Jun 2011 23:18:08 +0000 (16:18 -0700)]
drivers/misc/lkdtm.c: fix race when crashpoint is hit multiple times before checking count

We observed the crash point count going negative in cases where the
crash point is hit multiple times before the check of "count == 0" is
done.  Because of this we never call lkdtm_do_action().  This patch just
adds a spinlock to protect count.

Reported-by: Tapan Dhimant <tdhimant@akamai.com>
Signed-off-by: Josh Hunt <johunt@akamai.com>
Acked-by: Ankita Garg <ankita@in.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoinclude/linux/compat.h: declare compat_sys_sendmmsg()
Chris Metcalf [Mon, 27 Jun 2011 23:18:07 +0000 (16:18 -0700)]
include/linux/compat.h: declare compat_sys_sendmmsg()

This is required for tilegx to be able to use the compat unistd.h header
where compat_sys_sendmmsg() is now mentioned.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoromfs: fix romfs_get_unmapped_area() argument check
Bob Liu [Mon, 27 Jun 2011 23:18:06 +0000 (16:18 -0700)]
romfs: fix romfs_get_unmapped_area() argument check

romfs_get_unmapped_area() checks argument `len' without considering
PAGE_ALIGN which will cause do_mmap_pgoff() return -EINVAL error after
commit f67d9b1576c ("nommu: add page_align to mmap").

Fix the check by changing it in same way ramfs_nommu_get_unmapped_area()
was changed in ramfs/file-nommu.c.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Acked-by: Greg Ungerer <gerg@snapgear.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoum: add asm/percpu.h
Richard Weinberger [Mon, 27 Jun 2011 23:18:05 +0000 (16:18 -0700)]
um: add asm/percpu.h

To make SLUB work on UML we need this_cpu_cmpxchg from
asm-generic/percpu.h.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agodrivers/rtc/rtc-ds1307.c: add support for RTC device pt7c4338
Priyanka Jain [Mon, 27 Jun 2011 23:18:04 +0000 (16:18 -0700)]
drivers/rtc/rtc-ds1307.c: add support for RTC device pt7c4338

PT7C4338 chip is being manufactured by Pericom Technology Inc.  It is a
serial real-time clock which provides:

1) Low-power clock/calendar.
2) Programmable square-wave output.

It has 56 bytes of nonvolatile RAM.  Its register set is same as that of
rtc device: DS1307.

Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com>
Acked-by: Timur Tabi <timur@freescale.com>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>