Commit Graph

59007 Commits

Author SHA1 Message Date
Linus Torvalds
e13053f506 Merge branch 'sched-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull voluntary preemption fixes from Ingo Molnar:
 "This tree contains a speedup which is achieved through better
  might_sleep()/might_fault() preemption point annotations for uaccess
  functions, by Michael S Tsirkin:

  1. The only reason uaccess routines might sleep is if they fault.
     Make this explicit for all architectures.

  2. A voluntary preemption point in uaccess functions means compiler
     can't inline them efficiently, this breaks assumptions that they
     are very fast and small that e.g.  net code seems to make.  Remove
     this preemption point so behaviour matches with what callers
     assume.

  3. Accesses (e.g through socket ops) to kernel memory with KERNEL_DS
     like net/sunrpc does will never sleep.  Remove an unconditinal
     might_sleep() in the might_fault() inline in kernel.h (used when
     PROVE_LOCKING is not set).

  4. Accesses with pagefault_disable() return EFAULT but won't cause
     caller to sleep.  Check for that and thus avoid might_sleep() when
     PROVE_LOCKING is set.

  These changes offer a nice speedup for CONFIG_PREEMPT_VOLUNTARY=y
  kernels, here's a network bandwidth measurement between a virtual
  machine and the host:

   before:
        incoming: 7122.77   Mb/s
        outgoing: 8480.37   Mb/s

   after:
        incoming: 8619.24   Mb/s   [ +21.0% ]
        outgoing: 9455.42   Mb/s   [ +11.5% ]

  I kept these changes in a separate tree, separate from scheduler
  changes, because it's a mixed MM and scheduler topic"

* 'sched-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  mm, sched: Allow uaccess in atomic with pagefault_disable()
  mm, sched: Drop voluntary schedule from might_fault()
  x86: uaccess s/might_sleep/might_fault/
  tile: uaccess s/might_sleep/might_fault/
  powerpc: uaccess s/might_sleep/might_fault/
  mn10300: uaccess s/might_sleep/might_fault/
  microblaze: uaccess s/might_sleep/might_fault/
  m32r: uaccess s/might_sleep/might_fault/
  frv: uaccess s/might_sleep/might_fault/
  arm64: uaccess s/might_sleep/might_fault/
  asm-generic: uaccess s/might_sleep/might_fault/
2013-07-02 16:19:24 -07:00
Linus Torvalds
2d722f6d56 Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
 "The main changes:

   - load-calculation cleanups and improvements, by Alex Shi
   - various nohz related tidying up of statisics, by Frederic
     Weisbecker
   - factor out /proc functions to kernel/sched/proc.c, by Paul
     Gortmaker
   - simplify the RT policy scheduler, by Kirill Tkhai
   - various fixes and cleanups"

* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (42 commits)
  sched/debug: Remove CONFIG_FAIR_GROUP_SCHED mask
  sched/debug: Fix formatting of /proc/<PID>/sched
  sched: Fix typo in struct sched_avg member description
  sched/fair: Fix typo describing flags in enqueue_entity
  sched/debug: Add load-tracking statistics to task
  sched: Change get_rq_runnable_load() to static and inline
  sched/tg: Remove tg.load_weight
  sched/cfs_rq: Change atomic64_t removed_load to atomic_long_t
  sched/tg: Use 'unsigned long' for load variable in task group
  sched: Change cfs_rq load avg to unsigned long
  sched: Consider runnable load average in move_tasks()
  sched: Compute runnable load avg in cpu_load and cpu_avg_load_per_task
  sched: Update cpu load after task_tick
  sched: Fix sleep time double accounting in enqueue entity
  sched: Set an initial value of runnable avg for new forked task
  sched: Move a few runnable tg variables into CONFIG_SMP
  Revert "sched: Introduce temporary FAIR_GROUP_SCHED dependency for load-tracking"
  sched: Don't mix use of typedef ctl_table and struct ctl_table
  sched: Remove WARN_ON(!sd) from init_sched_groups_power()
  sched: Fix memory leakage in build_sched_groups()
  ...
2013-07-02 16:17:25 -07:00
Linus Torvalds
f0bb4c0ab0 Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf updates from Ingo Molnar:
 "Kernel improvements:

   - watchdog driver improvements by Li Zefan
   - Power7 CPI stack events related improvements by Sukadev Bhattiprolu
   - event multiplexing via hrtimers and other improvements by Stephane
     Eranian
   - kernel stack use optimization by Andrew Hunter
   - AMD IOMMU uncore PMU support by Suravee Suthikulpanit
   - NMI handling rate-limits by Dave Hansen
   - various hw_breakpoint fixes by Oleg Nesterov
   - hw_breakpoint overflow period sampling and related signal handling
     fixes by Jiri Olsa
   - Intel Haswell PMU support by Andi Kleen

  Tooling improvements:

   - Reset SIGTERM handler in workload child process, fix from David
     Ahern.
   - Makefile reorganization, prep work for Kconfig patches, from Jiri
     Olsa.
   - Add automated make test suite, from Jiri Olsa.
   - Add --percent-limit option to 'top' and 'report', from Namhyung
     Kim.
   - Sorting improvements, from Namhyung Kim.
   - Expand definition of sysfs format attribute, from Michael Ellerman.

  Tooling fixes:

   - 'perf tests' fixes from Jiri Olsa.
   - Make Power7 CPI stack events available in sysfs, from Sukadev
     Bhattiprolu.
   - Handle death by SIGTERM in 'perf record', fix from David Ahern.
   - Fix printing of perf_event_paranoid message, from David Ahern.
   - Handle realloc failures in 'perf kvm', from David Ahern.
   - Fix divide by 0 in variance, from David Ahern.
   - Save parent pid in thread struct, from David Ahern.
   - Handle JITed code in shared memory, from Andi Kleen.
   - Fixes for 'perf diff', from Jiri Olsa.
   - Remove some unused struct members, from Jiri Olsa.
   - Add missing liblk.a dependency for python/perf.so, fix from Jiri
     Olsa.
   - Respect CROSS_COMPILE in liblk.a, from Rabin Vincent.
   - No need to do locking when adding hists in perf report, only 'top'
     needs that, from Namhyung Kim.
   - Fix alignment of symbol column in in the hists browser (top,
     report) when -v is given, from NAmhyung Kim.
   - Fix 'perf top' -E option behavior, from Namhyung Kim.
   - Fix bug in isupper() and islower(), from Sukadev Bhattiprolu.
   - Fix compile errors in bp_signal 'perf test', from Sukadev
     Bhattiprolu.

  ... and more things"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (102 commits)
  perf/x86: Disable PEBS-LL in intel_pmu_pebs_disable()
  perf/x86: Fix shared register mutual exclusion enforcement
  perf/x86/intel: Support full width counting
  x86: Add NMI duration tracepoints
  perf: Drop sample rate when sampling is too slow
  x86: Warn when NMI handlers take large amounts of time
  hw_breakpoint: Introduce "struct bp_cpuinfo"
  hw_breakpoint: Simplify *register_wide_hw_breakpoint()
  hw_breakpoint: Introduce cpumask_of_bp()
  hw_breakpoint: Simplify the "weight" usage in toggle_bp_slot() paths
  hw_breakpoint: Simplify list/idx mess in toggle_bp_slot() paths
  perf/x86/intel: Add mem-loads/stores support for Haswell
  perf/x86/intel: Support Haswell/v4 LBR format
  perf/x86/intel: Move NMI clearing to end of PMI handler
  perf/x86/intel: Add Haswell PEBS support
  perf/x86/intel: Add simple Haswell PMU support
  perf/x86/intel: Add Haswell PEBS record support
  perf/x86/intel: Fix sparse warning
  perf/x86/amd: AMD IOMMU Performance Counter PERF uncore PMU implementation
  perf/x86/amd: Add IOMMU Performance Counter resource management
  ...
2013-07-02 16:15:23 -07:00
Linus Torvalds
a4883ef6af Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core irq changes from Ingo Molnar:
 "The main changes:

  - generic-irqchip driver additions, cleanups and fixes

  - 3 new irqchip drivers: ARMv7-M NVIC, TB10x and Marvell Orion SoCs

  - irq_get_trigger_type() simplification and cross-arch cleanup

  - various cleanups, simplifications

  - documentation updates"

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (26 commits)
  softirq: Use _RET_IP_
  genirq: Add the generic chip to the genirq docbook
  genirq: generic-chip: Export some irq_gc_ functions
  genirq: Fix can_request_irq() for IRQs without an action
  irqchip: exynos-combiner: Staticize combiner_init
  irqchip: Add support for ARMv7-M NVIC
  irqchip: Add TB10x interrupt controller driver
  irqdomain: Use irq_get_trigger_type() to get IRQ flags
  MIPS: octeon: Use irq_get_trigger_type() to get IRQ flags
  arm: orion: Use irq_get_trigger_type() to get IRQ flags
  mfd: stmpe: use irq_get_trigger_type() to get IRQ flags
  mfd: twl4030-irq: Use irq_get_trigger_type() to get IRQ flags
  gpio: mvebu: Use irq_get_trigger_type() to get IRQ flags
  genirq: Add irq_get_trigger_type() to get IRQ flags
  genirq: Irqchip: document gcflags arg of irq_alloc_domain_generic_chips
  genirq: Set irq thread to RT priority on creation
  irqchip: Add support for Marvell Orion SoCs
  genirq: Add kerneldoc for irq_disable.
  genirq: irqchip: Add mask to block out invalid irqs
  genirq: Generic chip: Add linear irq domain support
  ...
2013-07-02 16:14:35 -07:00
Linus Torvalds
ab3d681e9d Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU updates from Ingo Molnar:
 "The major changes:

  - Simplify RCU's grace-period and callback processing based on the new
    numbering for callbacks.

  - Removal of TINY_PREEMPT_RCU in favor of TREE_PREEMPT_RCU for
    single-CPU low-latency systems.

  - SRCU-related changes and fixes.

  - Miscellaneous fixes, including converting a few remaining printk()
    calls to pr_*().

  - Documentation updates"

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (32 commits)
  rcu: Shrink TINY_RCU by reworking CPU-stall ifdefs
  rcu: Shrink TINY_RCU by moving exit_rcu()
  rcu: Remove TINY_PREEMPT_RCU tracing documentation
  rcu: Consolidate rcutiny_plugin.h ifdefs
  rcu: Remove rcu_preempt_note_context_switch()
  rcu: Remove the CONFIG_TINY_RCU ifdefs in rcutiny.h
  rcu: Remove check_cpu_stall_preempt()
  rcu: Simplify RCU_TINY RCU callback invocation
  rcu: Remove rcu_preempt_process_callbacks()
  rcu: Remove rcu_preempt_remove_callbacks()
  rcu: Remove rcu_preempt_check_callbacks()
  rcu: Remove show_tiny_preempt_stats()
  rcu: Remove TINY_PREEMPT_RCU
  powerpc,kvm: fix imbalance srcu_read_[un]lock()
  rcu: Remove srcu_read_lock_raw() and srcu_read_unlock_raw().
  rcu: Apply Dave Jones's NOCB Kconfig help feedback
  rcu: Merge adjacent identical ifdefs
  rcu: Drive quiescent-state-forcing delay from HZ
  rcu: Remove "Experimental" flags
  kthread: Add kworker kthreads to OS-jitter documentation
  ...
2013-07-02 16:13:29 -07:00
Linus Torvalds
0c46d68d19 Merge branch 'core-mutexes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull WW mutex support from Ingo Molnar:
 "This tree adds support for wound/wait style locks, which the graphics
  guys would like to make use of in the TTM graphics subsystem.

  Wound/wait mutexes are used when other multiple lock acquisitions of a
  similar type can be done in an arbitrary order.  The deadlock handling
  used here is called wait/wound in the RDBMS literature: The older
  tasks waits until it can acquire the contended lock.  The younger
  tasks needs to back off and drop all the locks it is currently
  holding, ie the younger task is wounded.

  See this LWN.net description of W/W mutexes:

     https://lwn.net/Articles/548909/

  The comments there outline specific usecases for this facility (which
  have already been implemented for the DRM tree).

  Also see Documentation/ww-mutex-design.txt for more details"

* 'core-mutexes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking-selftests: Handle unexpected failures more strictly
  mutex: Add more w/w tests to test EDEADLK path handling
  mutex: Add more tests to lib/locking-selftest.c
  mutex: Add w/w tests to lib/locking-selftest.c
  mutex: Add w/w mutex slowpath debugging
  mutex: Add support for wound/wait style locks
  arch: Make __mutex_fastpath_lock_retval return whether fastpath succeeded or not
2013-07-02 16:09:13 -07:00
Linus Torvalds
3e42dee676 Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking changes from Ingo Molnar:
 "Four miscellanous standalone fixes for futexes, rtmutexes and
  Kconfig.locks."

* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  futex: Use freezable blocking call
  futex: Take hugepages into account when generating futex_key
  rtmutex: Document rt_mutex_adjust_prio_chain()
  locking: Fix copy/paste errors of "ARCH_INLINE_*_UNLOCK_BH"
2013-07-02 16:07:52 -07:00
Linus Torvalds
42daabf62b ARM SoC late changes
These are changes that arrived a little late before the merge
 window or that have multiple dependencies on previous branches
 so they did not fit into one of the earlier ones. There
 are 10 branches merged here, a total of 39 non-merge commits.
 Contents are a mixed bag for the above reasons:
 
 * Two new SoC platforms: ST microelectronics stixxxx and
   the TI 'Nspire' graphing calculator. These should have
   been in the 'soc' branch but were a little late
 * Support for the Exynos 5420 variant in mach-exynos,
   which is based on the other exynos branches to avoid
   conflicts.
 * Various small changes for sh-mobile, ux500 and davinci
 * Common clk support for MSM
 
 Conflicts:
 * In Kconfig.debug, various additions trivially conflict,
   the list should be kept in alphabetical order when
   resolving.
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Merge tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC late changes from Arnd Bergmann:
 "These are changes that arrived a little late before the merge window
  or that have multiple dependencies on previous branches so they did
  not fit into one of the earlier ones.  There are 10 branches merged
  here, a total of 39 non-merge commits.  Contents are a mixed bag for
  the above reasons:

   * Two new SoC platforms: ST microelectronics stixxxx and the TI
     'Nspire' graphing calculator.  These should have been in the 'soc'
     branch but were a little late
   * Support for the Exynos 5420 variant in mach-exynos, which is based
     on the other exynos branches to avoid conflicts.
   * Various small changes for sh-mobile, ux500 and davinci
   * Common clk support for MSM"

* tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (39 commits)
  ARM: ux500: bail out on alien cpus
  ARM: davinci: da850: adopt to pinctrl-single change for configuring multiple pins
  serial: sh-sci: Initialise variables before access in sci_set_termios()
  ARM: stih41x: Add B2020 board support
  ARM: stih41x: Add B2000 board support
  ARM: sti: Add DEBUG_LL console support
  ARM: sti: Add STiH416 SOC support
  ARM: sti: Add STiH415 SOC support
  ARM: msm: Migrate to common clock framework
  ARM: msm: Make proc_comm clock control into a platform driver
  ARM: msm: Prepare clk_get() users in mach-msm for clock-pcom driver
  ARM: msm: Remove clock-7x30.h include file
  ARM: msm: Remove custom clk_set_{max,min}_rate() API
  ARM: msm: Remove custom clk_set_flags() API
  msm: iommu: Use clk_set_rate() instead of clk_set_min_rate()
  msm: iommu: Convert to clk_prepare/unprepare
  msm_sdcc: Convert to clk_prepare/unprepare
  usb: otg: msm: Convert to clk_prepare/unprepare
  msm_serial: Use devm_clk_get() and properly return errors
  msm_serial: Convert to clk_prepare/unprepare
  ...
2013-07-02 14:42:51 -07:00
Linus Torvalds
0bf6a210a4 ARM SoC driver specific changes
These changes are all driver specific and cross over between arm-soc
 contents and some other subsystem, in these cases cpufreq, crypto,
 dma, pinctrl, mailbox and usb, and the subsystem owners agreed to
 have these changes merged through arm-soc. As we proceed to untangle
 the dependencies between platform code and driver code, the amount of
 changes in this category is fortunately shrinking, for 3.11 we have
 16 branches here and 101 non-merge changesets, the majority of which
 are for the stedma40 dma engine driver used in the ux500 platform.
 Cleaning up that code touches multiple subsystems, but gets rid
 of the dependency in the end.
 
 The mailbox code moved out from mach-omap2 to drivers/mailbox
 is an intermediate step and is still omap specific at the moment.
 Patches exist to generalize the subsystem and add other drivers
 with the same API, but those did not make it for 3.11.
 
 Conflicts:
 * In cpu-db8500.c results from the removal of the u8500_of_init_devices
   function in combination with the split of u8500_auxdata_lookup.
 
 * In arch/arm/mach-omap2/devices.c, the includes got reshuffled.
   we need to keep linux/wl12xx.h and linux/platform_data/mailbox-omap.h.
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Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver specific changes from Arnd Bergmann:
 "These changes are all driver specific and cross over between arm-soc
  contents and some other subsystem, in these cases cpufreq, crypto,
  dma, pinctrl, mailbox and usb, and the subsystem owners agreed to have
  these changes merged through arm-soc.

  As we proceed to untangle the dependencies between platform code and
  driver code, the amount of changes in this category is fortunately
  shrinking, for 3.11 we have 16 branches here and 101 non-merge
  changesets, the majority of which are for the stedma40 dma engine
  driver used in the ux500 platform.  Cleaning up that code touches
  multiple subsystems, but gets rid of the dependency in the end.

  The mailbox code moved out from mach-omap2 to drivers/mailbox is an
  intermediate step and is still omap specific at the moment.  Patches
  exist to generalize the subsystem and add other drivers with the same
  API, but those did not make it for 3.11."

* tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (101 commits)
  crypto: ux500: use dmaengine_submit API
  crypto: ux500: use dmaengine_prep_slave_sg API
  crypto: ux500: use dmaengine_device_control API
  crypto: ux500/crypt: add missing __iomem qualifiers
  crypto: ux500/hash: add missing static qualifiers
  crypto: ux500/hash: use readl on iomem addresses
  dmaengine: ste_dma40: Declare memcpy config as static
  ARM: ux500: Remove mop500_snowball_ethernet_clock_enable()
  ARM: ux500: Correct the EN_3v3 regulator's on/off GPIO
  ARM: ux500: Provide a AB8500 GPIO Device Tree node
  gpio: rcar: fix gpio_rcar_of_table
  gpio-rcar: Remove #ifdef CONFIG_OF around OF-specific sections
  gpio-rcar: Reference core gpio documentation in the DT bindings
  clk: exynos5250: Add enum entries for divider clock of i2s1 and i2s2
  ARM: dts: Update Samsung I2S documentation
  ARM: dts: add clock provider information for i2s controllers in Exynos5250
  ARM: dts: add Exynos audio subsystem clock controller node
  clk: samsung: register audio subsystem clocks using common clock framework
  ARM: dts: use #include for all device trees for Samsung
  pinctrl: s3c24xx: use correct header for chained_irq functions
  ...
2013-07-02 14:33:21 -07:00
Linus Torvalds
ee1a8d402e ARM SoC device tree changes
These changes from 30 individual branches for the most part update device
 tree files, but there are also a few source code changes that have crept
 in this time, usually in order to atomically move over a driver from
 using hardcoded data to DT probing.
 
 A number of platforms change their DT files to use the C preprocessor,
 which is causing a bit of churn, but that is hopefully only this once.
 
 There are a few conflicts with the other branches unfortunately:
 
 * in exynos5440.dtsi and kirkwood-6281.dtsi, device nodes are added
   from multiple branches. Need to be careful to have the right
   set of closing braces as git gets this one wrong.
 
 * In kirkwood.dtsi, one 'ranges' line got split into two lines, while
   another line got added. Order of the lines does not matter.
 
 * in sama5d3.dtsi, some cleanup was merged the wrong way, causing
   a bogus conflict. We want the 'dmas' and 'dma-names' properties
   to get added here.
 
 * Two lines got removed independently in arch/arm/mach-mxs/mach-mxs.c
 
 * Contents get added independently in arch/arm/mach-omap2/cclock33xx_data.c
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Merge tag 'dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC device tree changes from Arnd Bergmann:
 "These changes from 30 individual branches for the most part update
  device tree files, but there are also a few source code changes that
  have crept in this time, usually in order to atomically move over a
  driver from using hardcoded data to DT probing.

  A number of platforms change their DT files to use the C preprocessor,
  which is causing a bit of churn, but that is hopefully only this once"

* tag 'dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (372 commits)
  ARM: at91: dt: rm9200ek: add spi support
  ARM: at91: dt: rm9200: add spi support
  ARM: at91/DT: at91sam9n12: add SPI DMA client infos
  ARM: at91/DT: sama5d3: add SPI DMA client infos
  ARM: at91/DT: fix SPI compatibility string
  ARM: Kirkwood: Fix the internal register ranges translation
  ARM: dts: bcm281xx: change comment to C89 style
  ARM: mmc: bcm281xx SDHCI driver (dt mods)
  ARM: nomadik: add the new clocks to the device tree
  clk: nomadik: implement the Nomadik clocks properly
  ARM: dts: omap5-uevm: Provide USB Host PHY clock frequency
  ARM: dts: omap4-panda: Fix DVI EDID reads
  ARM: dts: omap4-panda: Add USB Host support
  arm: mvebu: enable mini-PCIe connectors on Armada 370 RD
  ARM: shmobile: irqpin: add a DT property to enable masking on parent
  ARM: dts: AM43x EPOS EVM support
  ARM: dts: OMAP5: Add bandgap DT entry
  ARM: dts: AM33XX: Add pinmux configuration for CPSW to am335x EVM
  ARM: dts: AM33XX: Add pinmux configuration for CPSW to EVMsk
  ARM: dts: AM33XX: Add pinmux configuration for CPSW to beaglebone
  ...
2013-07-02 14:23:01 -07:00
Linus Torvalds
3883cbb6c1 ARM SoC specific changes
These changes are all to SoC-specific code, a total of 33 branches on
 17 platforms were pulled into this. Like last time, Renesas sh-mobile
 is now the platform with the most changes, followed by OMAP and EXYNOS.
 
 Two new platforms, TI Keystone and Rockchips RK3xxx are added in
 this branch, both containing almost no platform specific code at all,
 since they are using generic subsystem interfaces for clocks, pinctrl,
 interrupts etc. The device drivers are getting merged through the
 respective subsystem maintainer trees.
 
 One more SoC (u300) is now multiplatform capable and several others
 (shmobile, exynos, msm, integrator, kirkwood, clps711x) are moving
 towards that goal with this series but need more work.
 
 Also noteworthy is the work on PCI here, which is traditionally part of
 the SoC specific code. With the changes done by Thomas Petazzoni, we can
 now more easily have PCI host controller drivers as loadable modules and
 keep them separate from the platform code in drivers/pci/host. This has
 already led to the discovery that three platforms (exynos, spear and imx)
 are actually using an identical PCIe host controller and will be able
 to share a driver once support for spear and imx is added.
 
 Conflicts:
 * asm/glue-proc.h has one CPU type getting added that conflicts
   with another addition in 3.10-rc7
 * Simple context changes in arch/arm/Makefile and arch/arm/Kconfig
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Merge tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC specific changes from Arnd Bergmann:
 "These changes are all to SoC-specific code, a total of 33 branches on
  17 platforms were pulled into this.  Like last time, Renesas sh-mobile
  is now the platform with the most changes, followed by OMAP and
  EXYNOS.

  Two new platforms, TI Keystone and Rockchips RK3xxx are added in this
  branch, both containing almost no platform specific code at all, since
  they are using generic subsystem interfaces for clocks, pinctrl,
  interrupts etc.  The device drivers are getting merged through the
  respective subsystem maintainer trees.

  One more SoC (u300) is now multiplatform capable and several others
  (shmobile, exynos, msm, integrator, kirkwood, clps711x) are moving
  towards that goal with this series but need more work.

  Also noteworthy is the work on PCI here, which is traditionally part
  of the SoC specific code.  With the changes done by Thomas Petazzoni,
  we can now more easily have PCI host controller drivers as loadable
  modules and keep them separate from the platform code in
  drivers/pci/host.  This has already led to the discovery that three
  platforms (exynos, spear and imx) are actually using an identical PCIe
  host controller and will be able to share a driver once support for
  spear and imx is added."

* tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (480 commits)
  ARM: integrator: let pciv3 use mem/premem from device tree
  ARM: integrator: set local side PCI addresses right
  ARM: dts: Add pcie controller node for exynos5440-ssdk5440
  ARM: dts: Add pcie controller node for Samsung EXYNOS5440 SoC
  ARM: EXYNOS: Enable PCIe support for Exynos5440
  pci: Add PCIe driver for Samsung Exynos
  ARM: OMAP5: voltagedomain data: remove temporary OMAP4 voltage data
  ARM: keystone: Move CPU bringup code to dedicated asm file
  ARM: multiplatform: always pick one CPU type
  ARM: imx: select syscon for IMX6SL
  ARM: keystone: select ARM_ERRATA_798181 only for SMP
  ARM: imx: Synertronixx scb9328 needs to select SOC_IMX1
  ARM: OMAP2+: AM43x: resolve SMP related build error
  dmaengine: edma: enable build for AM33XX
  ARM: edma: Add EDMA crossbar event mux support
  ARM: edma: Add DT and runtime PM support to the private EDMA API
  dmaengine: edma: Add TI EDMA device tree binding
  arm: add basic support for Rockchip RK3066a boards
  arm: add debug uarts for rockchip rk29xx and rk3xxx series
  arm: Add basic clocks for Rockchip rk3066a SoCs
  ...
2013-07-02 13:43:38 -07:00
Linus Torvalds
d2033f2c1d ARM SoC cleanups
This contains cleanups as preparation for other branches adding new
 features, we pulled 16 branches for 9 platforms into this one.
 
 Most notable here is the removal of support for ATAGS based OMAP4
 systems. Since all OMAP4 machines are fully functional with DT based
 booting in 3.10, we can remove a lot of code here.
 
 Also noteworthy is Maxime Ripard's cleanup of the machine descriptors,
 which means we need no machine descriptors in a lot more cases and
 can boot additional machines by just having the respective device
 drivers enabled.
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Merge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC cleanups from Arnd Bergmann:
 "This contains cleanups as preparation for other branches adding new
  features, we pulled 16 branches for 9 platforms into this one.

  Most notable here is the removal of support for ATAGS based OMAP4
  systems.  Since all OMAP4 machines are fully functional with DT based
  booting in 3.10, we can remove a lot of code here.

  Also noteworthy is Maxime Ripard's cleanup of the machine descriptors,
  which means we need no machine descriptors in a lot more cases and can
  boot additional machines by just having the respective device drivers
  enabled."

* tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (76 commits)
  ARM: picoxcell: remove .nr_irqs reference
  ARM: s5p64x0: avoid build warning for uncompress.h
  ARM: SAMSUNG: Remove unused plat/regs-watchdog.h header
  ARM: SAMSUNG: Remove legacy watchdog reset code
  ARM: SAMSUNG: Let platforms use the new watchdog reset driver
  ARM: SAMSUNG: Add watchdog reset driver
  ARM: SAMSUNG: Use local definitions of watchdog registers
  watchdog: s3c2410_wdt: Use local register definitions
  ARM: S5P64X0: Use common uncompress.h part for plat-samsung
  ARM: SAMSUNG: Consolidate uncompress subroutine
  ARM: at91: drop rm9200dk board support
  ARM: dts: msm: Fix merge resolution
  ARM: OMAP1: Remove dma.h
  ARM: OMAP1: Remove legacy irda.h and irda setup from board files
  ARM: OMAP1: Remove duplicated DMA channel definitions
  ARM: OMAP1: Remove McBSP DMA channel definitions
  ARM: OMAP2+: Remove dma.h
  ARM: OMAP2+: hwmod: Remove remaining DMA channel definitions
  ARM: OMAP2+: Remove duplicated DMA channel definitions
  ARM: OMAP2+: Remove AES crypto device DMA channel definitions
  ...
2013-07-02 13:25:35 -07:00
Linus Torvalds
22237d5a58 ARM SoC non-cricitical bug fixes
These are various bug fixes that were not considered important enough
 for merging into 3.10. The majority of the ARM fixes are for the OMAP
 and at91 platforms, and there is another set of bug fixes for device
 drivers that resolve 'randconfig' build errors and that the subsystem
 maintainers either did not pick up or preferred to get merged through
 the arm-soc tree.
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Merge tag 'fixes-non-critical-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC non-cricitical bug fixes from Arnd Bergmann:
 "These are various bug fixes that were not considered important enough
  for merging into 3.10.

  The majority of the ARM fixes are for the OMAP and at91 platforms, and
  there is another set of bug fixes for device drivers that resolve
  'randconfig' build errors and that the subsystem maintainers either
  did not pick up or preferred to get merged through the arm-soc tree."

* tag 'fixes-non-critical-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (43 commits)
  ARM: at91/PMC: use at91_usb_rate() for UTMI PLL
  ARM: at91/PMC: fix at91sam9n12 USB FS init
  ARM: at91/PMC: at91sam9n12 family has a PLLB
  ARM: at91/PMC: sama5d3 family doesn't have a PLLB
  ARM: tegra: fix section mismatch in tegra_pmc_parse_dt
  ARM: mxs: don't select HAVE_PWM
  ARM: mxs: stub out mxs_pm_init for !CONFIG_PM
  cpuidle: calxeda: select ARM_CPU_SUSPEND
  ARM: mvebu: fix length of ethernet registers in mv78260 dtsi
  ARM: at91: cpuidle: Fix target_residency
  ARM: at91: fix at91_extern_irq usage for non-dt boards
  ARM: sirf: use CONFIG_SIRF rather than CONFIG_PRIMA2 where necessary
  clocksource: kona: adapt to CLOCKSOURCE_OF_DECLARE change
  X.509: do not emit any informational output
  mtd: omap2: allow bulding as a module
  [SCSI] nsp32: use mdelay instead of large udelay constants
  hwrng: bcm2835: fix MODULE_LICENSE tag
  ARM: at91: Change the internal SRAM memory type MT_MEMORY_NONCACHED
  ARM: at91: Fix link breakage when !CONFIG_PHYLIB
  MAINTAINERS: Add exynos filename match to ARM/S5P EXYNOS ARM ARCHITECTURES
  ...
2013-07-02 13:24:47 -07:00
Linus Torvalds
fc76a258d4 Driver core patches for 3.11-rc1
Here's the big driver core merge for 3.11-rc1
 
 Lots of little things, and larger firmware subsystem updates, all
 described in the shortlog.  Nice thing here is that we finally get rid
 of CONFIG_HOTPLUG, after 10+ years, thanks to Stephen Rohtwell (it had
 been always on for a number of kernel releases, now it's just removed.)
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here's the big driver core merge for 3.11-rc1

  Lots of little things, and larger firmware subsystem updates, all
  described in the shortlog.  Nice thing here is that we finally get rid
  of CONFIG_HOTPLUG, after 10+ years, thanks to Stephen Rohtwell (it had
  been always on for a number of kernel releases, now it's just
  removed)"

* tag 'driver-core-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (27 commits)
  driver core: device.h: fix doc compilation warnings
  firmware loader: fix another compile warning with PM_SLEEP unset
  build some drivers only when compile-testing
  firmware loader: fix compile warning with PM_SLEEP set
  kobject: sanitize argument for format string
  sysfs_notify is only possible on file attributes
  firmware loader: simplify holding module for request_firmware
  firmware loader: don't export cache_firmware and uncache_firmware
  drivers/base: Use attribute groups to create sysfs memory files
  firmware loader: fix compile warning
  firmware loader: fix build failure with !CONFIG_FW_LOADER_USER_HELPER
  Documentation: Updated broken link in HOWTO
  Finally eradicate CONFIG_HOTPLUG
  driver core: firmware loader: kill FW_ACTION_NOHOTPLUG requests before suspend
  driver core: firmware loader: don't cache FW_ACTION_NOHOTPLUG firmware
  Documentation: Tidy up some drivers/base/core.c kerneldoc content.
  platform_device: use a macro instead of platform_driver_register
  firmware: move EXPORT_SYMBOL annotations
  firmware: Avoid deadlock of usermodehelper lock at shutdown
  dell_rbu: Select CONFIG_FW_LOADER_USER_HELPER explicitly
  ...
2013-07-02 11:44:19 -07:00
Linus Torvalds
fe3c22bd5c Char/Misc merge for 3.11-rc1
Here's the big char/misc driver tree merge for 3.11-rc1
 
 A variety of different driver patches here.  All of these have been in
 linux-next for a while, and the networking patches were acked-by David
 Miller, as it made sense for those patches to come through this tree.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc updates from Greg KH:
 "Here's the big char/misc driver tree merge for 3.11-rc1

  A variety of different driver patches here.  All of these have been in
  linux-next for a while, and the networking patches were acked-by David
  Miller, as it made sense for those patches to come through this tree"

* tag 'char-misc-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (102 commits)
  Revert "char: misc: assign file->private_data in all cases"
  drivers: uio_pdrv_genirq: Use of_match_ptr() macro
  mei: check whether hw start has succeeded
  mei: check if the hardware reset succeeded
  mei: mei_cl_connect: don't multiply the timeout twice
  mei: do not override a client writing state when buffering
  mei: move mei_cl_irq_write_complete to client.c
  UIO: Fix concurrency issue
  drivers: uio_dmem_genirq: Use of_match_ptr() macro
  char: misc: assign file->private_data in all cases
  drivers: hv: allocate synic structures before hv_synic_init()
  drivers: hv: check interrupt mask before read_index
  vme: vme_tsi148.c: fix error return code in tsi148_probe()
  FMC: fix error handling in probe() function
  fmc: avoid readl/writel namespace conflict
  FMC: NULL dereference on allocation failure
  UIO: fix uio_pdrv_genirq with device tree but no interrupt
  UIO: allow binding uio_pdrv_genirq.c to devices using command line option
  FMC: add a char-device mezzanine driver
  FMC: add a driver to write mezzanine EEPROM
  ...
2013-07-02 11:43:33 -07:00
Linus Torvalds
ce49b6289f Staging tree merge for 3.11-rc1
Here's the large staging tree merge for 3.11-rc1
 
 Huge thing here is the Lustre client code.  Unfortunatly, due to it not
 building properly on a wide variety of different architectures (this was
 production code???), it is currently disabled from the build so as to
 not annoy people.
 
 Other than Lustre, there are loads of comedi patches, working to clean
 up that subsystem, iio updates and new drivers, and a load of cleanups
 from the OPW applicants in their quest to get a summer internship.
 
 All of these have been in the linux-next releases for a while (hence the
 Lustre code being disabled.)
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging tree update from Greg KH:
 "Here's the large staging tree merge for 3.11-rc1

  Huge thing here is the Lustre client code.  Unfortunatly, due to it
  not building properly on a wide variety of different architectures
  (this was production code???), it is currently disabled from the build
  so as to not annoy people.

  Other than Lustre, there are loads of comedi patches, working to clean
  up that subsystem, iio updates and new drivers, and a load of cleanups
  from the OPW applicants in their quest to get a summer internship.

  All of these have been in the linux-next releases for a while (hence
  the Lustre code being disabled)"

Fixed up trivial conflict in drivers/staging/serqt_usb2/serqt_usb2.c due
to independent renamings in the staging driver cleanup and the USB
tree..

* tag 'staging-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (868 commits)
  Revert "Revert "Revert "staging/lustre: drop CONFIG_BROKEN dependency"""
  staging: rtl8192u: fix line length in r819xU_phy.h
  staging: rtl8192u: rename variables in r819xU_phy.h
  staging: rtl8192u: fix comments in r819xU_phy.h
  staging: rtl8192u: fix whitespace in r819xU_phy.h
  staging: rtl8192u: fix newlines in r819xU_phy.c
  staging: comedi: unioxx5: use comedi_alloc_spriv()
  staging: comedi: unioxx5: fix unioxx5_detach()
  silicom: checkpatch: errors caused by macros
  Staging: silicom: remove the board_t typedef in bpctl_mod.c
  Staging: silicom: capitalize labels in the bp_media_type enum
  Staging: silicom: remove bp_media_type enum typedef
  staging: rtl8192u: replace msleep(1) with usleep_range() in r819xU_phy.c
  staging: rtl8192u: rename dwRegRead and rtStatus in r819xU_phy.c
  staging: rtl8192u: replace __FUNCTION__ in r819xU_phy.c
  staging: rtl8192u: limit line size in r819xU_phy.c
  zram: allow request end to coincide with disksize
  staging: drm/imx: use generic irq chip unused field to block out invalid irqs
  staging: drm/imx: use generic irqchip
  staging: drm/imx: ipu-dmfc: use defines for ipu channel numbers
  ...
2013-07-02 11:40:23 -07:00
Linus Torvalds
0de10f9ea6 TTY/Serial merge for 3.11-rc1
Here is the big TTY / Serial driver merge for 3.11-rc1.
 
 It's not all that big, nothing major changed in the tty api, which is a
 nice change, just a number of serial driver fixes and updates and new
 drivers, along with some n_tty fixes to help resolve some reported
 issues.
 
 All of these have been in the linux-next releases for a while, with the
 exception of the last revert patch, which was reported this past weekend
 by two different people as being needed.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial updates from Greg KH:
 "Here is the big TTY / Serial driver merge for 3.11-rc1.

  It's not all that big, nothing major changed in the tty api, which is
  a nice change, just a number of serial driver fixes and updates and
  new drivers, along with some n_tty fixes to help resolve some reported
  issues.

  All of these have been in the linux-next releases for a while, with
  the exception of the last revert patch, which was reported this past
  weekend by two different people as being needed."

* tag 'tty-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (51 commits)
  Revert "serial: 8250_pci: add support for another kind of NetMos Technology PCI 9835 Multi-I/O Controller"
  pch_uart: Add uart_clk selection for the MinnowBoard
  tty: atmel_serial: prepare clk before calling enable
  tty: Reset itty for other pty
  n_tty: Buffer work should not reschedule itself
  n_tty: Fix unsafe update of available buffer space
  n_tty: Untangle read completion variables
  n_tty: Encapsulate minimum_to_wake within N_TTY
  serial: omap: Fix device tree based PM runtime
  serial: imx: Fix serial clock unbalance
  serial/mpc52xx_uart: fix kernel panic when system reboot
  serial: mfd: Add sysrq support
  serial: imx: enable the clocks for console
  tty: serial: add Freescale lpuart driver support
  serial: imx: Improve Kconfig text
  serial: imx: Allow module build
  serial: imx: Fix warning when !CONFIG_SERIAL_IMX_CONSOLE
  tty/serial/sirf: fix error propagation in sirfsoc_uart_probe()
  serial: omap: fix potential NULL pointer dereference in serial_omap_runtime_suspend()
  tty: serial: Enable uartlite for ARM zynq
  ...
2013-07-02 11:32:06 -07:00
Linus Torvalds
a84270189e USB 3.11-rc1 merge
Here's the big USB 3.11-rc1 merge request.
 
 Lots of gadget and finally, chipidea driver updates (they were much
 needed), along with a new host controller driver, lots of little serial
 driver fixes, the removal of the 255 usb-serial device limitation, and a
 variety of other minor things.
 
 All of these have been in the linux-next releases for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB updates from Greg KH:
 "Here's the big USB 3.11-rc1 merge request.

  Lots of gadget and finally, chipidea driver updates (they were much
  needed), along with a new host controller driver, lots of little
  serial driver fixes, the removal of the 255 usb-serial device
  limitation, and a variety of other minor things.

  All of these have been in the linux-next releases for a while"

* tag 'usb-3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (254 commits)
  usb: musb: omap2430: make it compile again
  usb: chipidea: ci_hdrc_imx: access phy via private data
  xhci: Add missing unlocks on error paths
  USB: option,qcserial: move Novatel Gobi1K IDs to qcserial
  ehci-atmel.c: prepare clk before calling enable
  USB: ohci-at91: prepare clk before calling enable
  USB: HWA: fix device probe failure
  wusbcore: add entries in Documentation/ABI for new wusbhc sysfs attributes
  wusbcore: add sysfs attribute for retry count
  wusbcore: add sysfs attribute for DNTS count and interval
  usb: chipidea: drop "13xxx" infix
  usb: phy: tegra: remove duplicated include from phy-tegra-usb.c
  usb: host: xhci-plat: release mem region while removing module
  usbmisc_imx: allow autoloading on according to dt ids
  usb: fix build error without CONFIG_USB_PHY
  usb: check usb_hub_to_struct_hub() return value
  xhci: check for failed dma pool allocation
  usb: gadget: f_subset: fix missing unlock on error in geth_alloc()
  usb: gadget: f_ncm: fix missing unlock on error in ncm_alloc()
  usb: gadget: f_ecm: fix missing unlock on error in ecm_alloc()
  ...
2013-07-02 11:31:09 -07:00
Linus Torvalds
bcd7351e83 FS-Cache patches 2013-07-02
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Merge tag 'fscache-20130702' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull FS-Cache updates from David Howells:
 "This contains a number of fixes for various FS-Cache issues plus some
  cleanups.  The commits are, in order:

   1) Provide a system wait_on_atomic_t() and wake_up_atomic_t() sharing
      the bit-wait table (enhancement for #8).

   2) Don't put spin_lock() in a while-condition as spin_lock() may have
      a do {} while(0) wrapper (cleanup).

   3) Symbolically name i_mutex lock classes rather than using numbers
      in CacheFiles (cleanup).

   4) Don't sleep in page release if __GFP_FS is not set (deadlock vs
      ext4).

   5) Uninline fscache_object_init() (cleanup for #7).

   6) Wrap checks on object state (cleanup for #7).

   7) Simplify the object state machine by separating work states from
      wait states.

   8) Simplify cookie retention by objects (NULL pointer deref fix).

   9) Remove unused list_to_page() macro (cleanup).

  10) Make the remaining-pages counter in the retrieval op atomic
      (assertion failure fix).

  11) Don't use spin_is_locked() in assertions (assertion failure fix)"

* tag 'fscache-20130702' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  FS-Cache: Don't use spin_is_locked() in assertions
  FS-Cache: The retrieval remaining-pages counter needs to be atomic_t
  cachefiles: remove unused macro list_to_page()
  FS-Cache: Simplify cookie retention for fscache_objects, fixing oops
  FS-Cache: Fix object state machine to have separate work and wait states
  FS-Cache: Wrap checks on object state
  FS-Cache: Uninline fscache_object_init()
  FS-Cache: Don't sleep in page release if __GFP_FS is not set
  CacheFiles: name i_mutex lock class explicitly
  fs/fscache: remove spin_lock() from the condition in while()
  Add wait_on_atomic_t() and wake_up_atomic_t()
2013-07-02 09:52:47 -07:00
Linus Torvalds
3f490f7f99 This patch-set includes the following major enhancement patches.
o remount_fs callback function
  o restore parent inode number to enhance the fsync performance
  o xattr security labels
  o reduce the number of redundant lock/unlock data pages
  o avoid frequent write_inode calls
 
 The other minor bug fixes are as follows.
  o endian conversion bugs
  o various bugs in the roll-forward recovery routine
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Merge tag 'for-f2fs-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs updates from Jaegeuk Kim:
 "This patch-set includes the following major enhancement patches:
   - remount_fs callback function
   - restore parent inode number to enhance the fsync performance
   - xattr security labels
   - reduce the number of redundant lock/unlock data pages
   - avoid frequent write_inode calls

  The other minor bug fixes are as follows.
   - endian conversion bugs
   - various bugs in the roll-forward recovery routine"

* tag 'for-f2fs-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (56 commits)
  f2fs: fix to recover i_size from roll-forward
  f2fs: remove the unused argument "sbi" of func destroy_fsync_dnodes()
  f2fs: remove reusing any prefree segments
  f2fs: code cleanup and simplify in func {find/add}_gc_inode
  f2fs: optimize the init_dirty_segmap function
  f2fs: fix an endian conversion bug detected by sparse
  f2fs: fix crc endian conversion
  f2fs: add remount_fs callback support
  f2fs: recover wrong pino after checkpoint during fsync
  f2fs: optimize do_write_data_page()
  f2fs: make locate_dirty_segment() as static
  f2fs: remove unnecessary parameter "offset" from __add_sum_entry()
  f2fs: avoid freqeunt write_inode calls
  f2fs: optimise the truncate_data_blocks_range() range
  f2fs: use the F2FS specific flags in f2fs_ioctl()
  f2fs: sync dir->i_size with its block allocation
  f2fs: fix i_blocks translation on various types of files
  f2fs: set sb->s_fs_info before calling parse_options()
  f2fs: support xattr security labels
  f2fs: fix iget/iput of dir during recovery
  ...
2013-07-02 09:42:38 -07:00
Linus Torvalds
9e239bb939 Lots of bug fixes, cleanups and optimizations. In the bug fixes
category, of note is a fix for on-line resizing file systems where the
 block size is smaller than the page size (i.e., file systems 1k blocks
 on x86, or more interestingly file systems with 4k blocks on Power or
 ia64 systems.)
 
 In the cleanup category, the ext4's punch hole implementation was
 significantly improved by Lukas Czerner, and now supports bigalloc
 file systems.  In addition, Jan Kara significantly cleaned up the
 write submission code path.  We also improved error checking and added
 a few sanity checks.
 
 In the optimizations category, two major optimizations deserve
 mention.  The first is that ext4_writepages() is now used for
 nodelalloc and ext3 compatibility mode.  This allows writes to be
 submitted much more efficiently as a single bio request, instead of
 being sent as individual 4k writes into the block layer (which then
 relied on the elevator code to coalesce the requests in the block
 queue).  Secondly, the extent cache shrink mechanism, which was
 introduce in 3.9, no longer has a scalability bottleneck caused by the
 i_es_lru spinlock.  Other optimizations include some changes to reduce
 CPU usage and to avoid issuing empty commits unnecessarily.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 update from Ted Ts'o:
 "Lots of bug fixes, cleanups and optimizations.  In the bug fixes
  category, of note is a fix for on-line resizing file systems where the
  block size is smaller than the page size (i.e., file systems 1k blocks
  on x86, or more interestingly file systems with 4k blocks on Power or
  ia64 systems.)

  In the cleanup category, the ext4's punch hole implementation was
  significantly improved by Lukas Czerner, and now supports bigalloc
  file systems.  In addition, Jan Kara significantly cleaned up the
  write submission code path.  We also improved error checking and added
  a few sanity checks.

  In the optimizations category, two major optimizations deserve
  mention.  The first is that ext4_writepages() is now used for
  nodelalloc and ext3 compatibility mode.  This allows writes to be
  submitted much more efficiently as a single bio request, instead of
  being sent as individual 4k writes into the block layer (which then
  relied on the elevator code to coalesce the requests in the block
  queue).  Secondly, the extent cache shrink mechanism, which was
  introduce in 3.9, no longer has a scalability bottleneck caused by the
  i_es_lru spinlock.  Other optimizations include some changes to reduce
  CPU usage and to avoid issuing empty commits unnecessarily."

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (86 commits)
  ext4: optimize starting extent in ext4_ext_rm_leaf()
  jbd2: invalidate handle if jbd2_journal_restart() fails
  ext4: translate flag bits to strings in tracepoints
  ext4: fix up error handling for mpage_map_and_submit_extent()
  jbd2: fix theoretical race in jbd2__journal_restart
  ext4: only zero partial blocks in ext4_zero_partial_blocks()
  ext4: check error return from ext4_write_inline_data_end()
  ext4: delete unnecessary C statements
  ext3,ext4: don't mess with dir_file->f_pos in htree_dirblock_to_tree()
  jbd2: move superblock checksum calculation to jbd2_write_superblock()
  ext4: pass inode pointer instead of file pointer to punch hole
  ext4: improve free space calculation for inline_data
  ext4: reduce object size when !CONFIG_PRINTK
  ext4: improve extent cache shrink mechanism to avoid to burn CPU time
  ext4: implement error handling of ext4_mb_new_preallocation()
  ext4: fix corruption when online resizing a fs with 1K block size
  ext4: delete unused variables
  ext4: return FIEMAP_EXTENT_UNKNOWN for delalloc extents
  jbd2: remove debug dependency on debug_fs and update Kconfig help text
  jbd2: use a single printk for jbd_debug()
  ...
2013-07-02 09:39:34 -07:00
Linus Torvalds
63580e51bb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull VFS patches (part 1) from Al Viro:
 "The major change in this pile is ->readdir() replacement with
  ->iterate(), dealing with ->f_pos races in ->readdir() instances for
  good.

  There's a lot more, but I'd prefer to split the pull request into
  several stages and this is the first obvious cutoff point."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (67 commits)
  [readdir] constify ->actor
  [readdir] ->readdir() is gone
  [readdir] convert ecryptfs
  [readdir] convert coda
  [readdir] convert ocfs2
  [readdir] convert fatfs
  [readdir] convert xfs
  [readdir] convert btrfs
  [readdir] convert hostfs
  [readdir] convert afs
  [readdir] convert ncpfs
  [readdir] convert hfsplus
  [readdir] convert hfs
  [readdir] convert befs
  [readdir] convert cifs
  [readdir] convert freevxfs
  [readdir] convert fuse
  [readdir] convert hpfs
  reiserfs: switch reiserfs_readdir_dentry to inode
  reiserfs: is_privroot_deh() needs only directory inode, actually
  ...
2013-07-02 09:28:37 -07:00
Dave Chinner
7747bd4bce sync: don't block the flusher thread waiting on IO
When sync does it's WB_SYNC_ALL writeback, it issues data Io and
then immediately waits for IO completion. This is done in the
context of the flusher thread, and hence completely ties up the
flusher thread for the backing device until all the dirty inodes
have been synced. On filesystems that are dirtying inodes constantly
and quickly, this means the flusher thread can be tied up for
minutes per sync call and hence badly affect system level write IO
performance as the page cache cannot be cleaned quickly.

We already have a wait loop for IO completion for sync(2), so cut
this out of the flusher thread and delegate it to wait_sb_inodes().
Hence we can do rapid IO submission, and then wait for it all to
complete.

Effect of sync on fsmark before the patch:

FSUse%        Count         Size    Files/sec     App Overhead
.....
     0       640000         4096      35154.6          1026984
     0       720000         4096      36740.3          1023844
     0       800000         4096      36184.6           916599
     0       880000         4096       1282.7          1054367
     0       960000         4096       3951.3           918773
     0      1040000         4096      40646.2           996448
     0      1120000         4096      43610.1           895647
     0      1200000         4096      40333.1           921048

And a single sync pass took:

  real    0m52.407s
  user    0m0.000s
  sys     0m0.090s

After the patch, there is no impact on fsmark results, and each
individual sync(2) operation run concurrently with the same fsmark
workload takes roughly 7s:

  real    0m6.930s
  user    0m0.000s
  sys     0m0.039s

IOWs, sync is 7-8x faster on a busy filesystem and does not have an
adverse impact on ongoing async data write operations.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-02 09:16:42 -07:00
Theodore Ts'o
41a5b91319 jbd2: invalidate handle if jbd2_journal_restart() fails
If jbd2_journal_restart() fails the handle will have been disconnected
from the current transaction.  In this situation, the handle must not
be used for for any jbd2 function other than jbd2_journal_stop().
Enforce this with by treating a handle which has a NULL transaction
pointer as an aborted handle, and issue a kernel warning if
jbd2_journal_extent(), jbd2_journal_get_write_access(),
jbd2_journal_dirty_metadata(), etc. is called with an invalid handle.

This commit also fixes a bug where jbd2_journal_stop() would trip over
a kernel jbd2 assertion check when trying to free an invalid handle.

Also move the responsibility of setting current->journal_info to
start_this_handle(), simplifying the three users of this function.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reported-by: Younger Liu <younger.liu@huawei.com>
Cc: Jan Kara <jack@suse.cz>
2013-07-01 08:12:41 -04:00
Theodore Ts'o
21ddd568c1 ext4: translate flag bits to strings in tracepoints
Translate the bitfields used in various flags argument to strings to
make the tracepoint output more human-readable.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2013-07-01 08:12:40 -04:00
Ingo Molnar
2fd1b48788 Linux 3.10
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Merge tag 'v3.10' into sched/core

Merge in a recent upstream commit:

  c2853c8df5 include/linux/math64.h: add div64_ul()

because:

  72a4cf20cb sched: Change cfs_rq load avg to unsigned long

relies on it.

[ We don't rebase sched/core for this, because the handful of
  followup commits after the broken commit are not behavioral
  changes so are unlikely to be needed during bisection. ]

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-07-01 11:18:53 +02:00
Al Viro
ac6614b764 [readdir] constify ->actor
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29 12:57:05 +04:00
Al Viro
2233f31aad [readdir] ->readdir() is gone
everything's converted to ->iterate()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29 12:57:04 +04:00
Al Viro
5ded75ec4c [readdir] convert ext3
new helper: dir_relax(inode).  Call when you are in location that will
_not_ be invalidated by directory modifications (block boundary, in case
of ext*).  Returns whether the directory has survived (dropping i_mutex
allows rmdir to kill the sucker; if it returns false to us, ->iterate()
is obviously done)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29 12:46:49 +04:00
Al Viro
5f99f4e79a [readdir] switch dcache_readdir() users to ->iterate()
new helpers - dir_emit_dot(file, ctx, dentry), dir_emit_dotdot(file, ctx),
dir_emit_dots(file, ctx).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29 12:46:48 +04:00
Al Viro
bb6f619b3a [readdir] introduce ->iterate(), ctx->pos, dir_emit()
New method - ->iterate(file, ctx).  That's the replacement for ->readdir();
it takes callback from ctx->actor, uses ctx->pos instead of file->f_pos and
calls dir_emit(ctx, ...) instead of filldir(data, ...).  It does *not*
update file->f_pos (or look at it, for that matter); iterate_dir() does the
update.

Note that dir_emit() takes the offset from ctx->pos (and eventually
filldir_t will lose that argument).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29 12:46:47 +04:00
Al Viro
5c0ba4e076 [readdir] introduce iterate_dir() and dir_context
iterate_dir(): new helper, replacing vfs_readdir().

struct dir_context: contains the readdir callback (and will get more stuff
in it), embedded into whatever data that callback wants to deal with;
eventually, we'll be passing it to ->readdir() replacement instead of
(data,filldir) pair.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29 12:46:46 +04:00
Al Viro
83a8761142 move linux/loop.h to drivers/block
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29 12:46:45 +04:00
Al Viro
40d158e618 consolidate io_remap_pfn_range definitions
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-29 12:46:35 +04:00
Arnd Bergmann
0ad578ef25 Renesas sh-sci updates for v3.11
HSCIF support by Ulrich Hecht.
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Merge tag 'renesas-sh-sci-for-v3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/late

Renesas sh-sci updates for v3.11

HSCIF support by Ulrich Hecht.

* tag 'renesas-sh-sci-for-v3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  serial: sh-sci: Initialise variables before access in sci_set_termios()
  ARM: shmobile: r8a7790: don't use external clock for SCIFs
  ARM: shmobile: r8a7790: HSCIF support
  serial: sh-sci: HSCIF support

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-27 14:26:33 +02:00
Kamalesh Babulal
239003ea2e sched: Fix typo in struct sched_avg member description
Remove extra 'for' from the description about member of
struct sched_avg.

Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Cc: pjt@google.com
Cc: peterz@infradead.org
Link: http://lkml.kernel.org/r/20130627060409.GB18582@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:18:26 +02:00
Alex Shi
141965c749 Revert "sched: Introduce temporary FAIR_GROUP_SCHED dependency for load-tracking"
Remove CONFIG_FAIR_GROUP_SCHED that covers the runnable info, then
we can use runnable load variables.

Also remove 2 CONFIG_FAIR_GROUP_SCHED setting which is not in reverted
patch(introduced in 9ee474f), but also need to revert.

Signed-off-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/51CA76A3.3050207@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-27 10:07:22 +02:00
Linus Torvalds
98b6ed0f2b Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Found via trinity:

    If you connect up an ipv6 socket to an ipv4 mapped address then an
    ipv6 one, sendmsg() can croak because ip6_sk_dst_check() assumes the
    route cached in the socket is an ipv6 one.  In this case there is an
    ipv4 route attached, so it gets stomped on.

    Reported by Dave Jones and Hannes Frederic Sowa, fixed by Eric
    Dumazet.

 2) AF_KEY notifications leak some kernel memory to userspace, fix from
    Mathias Krause.

 3) DLCI calls __dev_get_by_name() without proper locking, and dlci_del
    doesn't validate that the device being deleted is actually a DLCI
    one.  Fixes from Li Zefan.

 4) Length check on bluetooth l2cap information responses is wrong, each
    response type has a different lenth, so we should make sure it's in
    a given range rather than enforce one single valid length.  From
    Jaganath Kanakkassery.

 5) Receive FIFO overflow is really easy to trigger in stress scenerios
    in the sh_eth driver, but the event isn't being handled properly at
    all.  Specifically, the mask of error interrupts doesn't include the
    event so we never clear it, resulting in the driver becomming wedged
    processing an interrupt that never gets cleared.

    Fix from Sergei Shtylyov.

 6) qlcnic sleeps while holding a spinlock, use mdelay() instead of
    msleep().  From Shahed Shaikh.

 7) Missing curly braces causes SIP netfilter NAT module to always drop
    packets.  Fix from Balazs Peter Odor.

 8) ipt_ULOG in netfilter passes the wrong value to timer setup, causing
    the timer to dereference crap when it fires.  Fix from Gao Feng.

 9) Missing RCU protection around txq->axq_acq traversal in
    ath_txq_schedule().  Fix from Felix Fietkau.

10) Idle state transition test in ath9k_htc_config() is reversed, fix
    from Sujith Manoharan.

11) IPV6 forwarding handles unicast Router Alert packets incorrectly.
    It tests the wrong option state.  Previously opt->ra being non-zero
    indicated a router alert marking in the SKB, but now it's indicated
    by a bit in opt->flags.  Fix from YOSHIFUJI Hideaki.

12) SKB leak in GRE tunnel GSO handling, from Eric Dumazet.

13) get_user_pages_fast() error handling in TUN and MACVTAP use the same
    local variable for the base index and the loop iterator for page
    traversal, oops! Fix from Michael S Tsirkin.

14) ipv6_get_lladdr() can fail, and we must therefore check it's return
    value in inet6_set_iftoken().  For from Hannes Frederic Sowa.

15) If you change an interface name and meanwhile can sneak in something
    that looks up the name (like SO_BINDTODEVICE or SIOCGIFNAME) we can
    deadlock with CONFIG_PREEMPT=n.  Fix this by providing a helper
    function that properly uses raw_seqcount_begin().  From Nicolas
    Schichan.

16) Chain noise calibration test is inverted in iwlwifi, fix from
    Nikolay Martynov.

17) Properly set TX iwlwifi descriptor flags for back requests.  Fix
    from Emmanuel Grumbach.

18) We can't assume skb_transport_header() is set in xt_TCPOPTSTRAP
    module, fix from Pablo Neira Ayuso.

19) Some crummy APs don't provide the proper High Throughput info in
    association response frames.  Add a workaround by assume we'll use
    whatever is in the beacon/probe.  Fix from Johannes Berg.

20) mac80211 call to rate_idx_match_mask() swaps two arguments (mask and
    channel width).  Fix from Simon Wunderlich.

21) xt_TCPMSS (like xt_TCPOPTSTRAP) must not try to handle fragmented
    frames.  Fix from Phil Oester.

22) Fix rate control regression causing iwlwifi/iwlegacy chips to use
    1Mbit/s on pre-11n networks.  From Moshe Benji and Stanslaw Gruszka.

23) Disable brcmsmac power-save functions, they cause regressions.  From
    Arend van Spriel.

24) Enforce a sane minimum MTU in l2cap_build_cmd() otherwise we can
    easily crash.  Fix from Anderson Lizardo.

25) If a learning packet arrives during vxlan_stop() we crash, easily
    fixed by checking netif_running().  From Stephen Hemminger.

26) Static vxlan FDB entries should not be migrated, also from Stephen.

27) skb_clone() failures not handled in vxlan_xmit(), oops.  Also from
    Stephen.

28) Add minimal driver for AR816x/AR817x ethernet chips, from Johannes
    Berg.

29) Fix regression in userspace VLAN acceleration control, added by the
    802.1ad support changes.  Fix from Fernando Luis Vazquez Cao.

30) Interval selection for MLD queries in the bridging code was
    reversed.  Fix from Linus Lüssing.

31) ipv6's ndisc_send_redirect() erroneously writes to the packet we
    received not the packet we are building to send out.  Fix from
    Matthias Schiffer.

32) Don't free netdev before unregistering it, in usb_8dev can driver.
    From Marc Kleine-Budde.

33) Fix nl80211 attribute buffer races, from Johannes Berg.

34) Although netlink_diag.h is under uapi/ it isn't present in Kbuild.
    From Stephen Hemminger.

35) Wrong address and family passed to MD5 key lookups in TCP, from
    Aydin Arik.

36) phy_type attribute created by SFC driver should not be writable.
    From Ben Hutchings.

37) Receive/Transmit queue allocations in pxa168_eth and mv643xx_eth
    should use kzalloc().  Otherwise if setup fails half-way, we'll
    dereference garbage when trying to teardown the rings.  From Lubomir
    Rintel.

38) Fix double-allocation of dst (resulting in unfreeable net device) in
    ipv6's init_loopback().  From Gao Feng.

39) Fix fragmentation handling SKB leak in netfilter conntrack, we were
    freeing the wrong skb pointer.  From Phil Oester.

40) Don't report "-1" (SPEED_UNKNOWN) in bond_miimon_commit(), from
    Nikolay Aleksandrov.

41) davinci_cpdma doesn't check for DMA mapping errors, letting the
    device scribble to random addresses.  From Sebastian Siewior.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (69 commits)
  dlci: validate the net device in dlci_del()
  dlci: acquire rtnl_lock before calling __dev_get_by_name()
  af_key: fix info leaks in notify messages
  ipv6: ip6_sk_dst_check() must not assume ipv6 dst
  net: fix kernel deadlock with interface rename and netdev name retrieval.
  net/tg3: Avoid delay during MMIO access
  ipv6: check return value of ipv6_get_lladdr
  macvtap: fix recovery from gup errors
  tun: fix recovery from gup errors
  gre: fix a possible skb leak
  ipv6: Process unicast packet with Router Alert by checking flag in skb.
  ath9k_htc: Handle IDLE state transition properly
  ath9k: fix an RCU issue in calling ieee80211_get_tx_rates
  netfilter: ipt_ULOG: fix incorrect setting of ulog timer
  netfilter: ctnetlink: send event when conntrack label was modified
  netfilter: nf_nat_sip: fix mangling
  qlcnic: Do not sleep while holding spinlock
  drivers: net: cpsw: fix compilation error with cpsw driver
  tcp: doc : fix the syncookies default value
  sh_eth: fix misreporting of transmit abort
  ...
2013-06-26 19:24:37 -10:00
Nicolas Schichan
5dbe7c178d net: fix kernel deadlock with interface rename and netdev name retrieval.
When the kernel (compiled with CONFIG_PREEMPT=n) is performing the
rename of a network interface, it can end up waiting for a workqueue
to complete. If userland is able to invoke a SIOCGIFNAME ioctl or a
SO_BINDTODEVICE getsockopt in between, the kernel will deadlock due to
the fact that read_secklock_begin() will spin forever waiting for the
writer process (the one doing the interface rename) to update the
devnet_rename_seq sequence.

This patch fixes the problem by adding a helper (netdev_get_name())
and using it in the code handling the SIOCGIFNAME ioctl and
SO_BINDTODEVICE setsockopt.

The netdev_get_name() helper uses raw_seqcount_begin() to avoid
spinning forever, waiting for devnet_rename_seq->sequence to become
even. cond_resched() is used in the contended case, before retrying
the access to give the writer process a chance to finish.

The use of raw_seqcount_begin() will incur some unneeded work in the
reader process in the contended case, but this is better than
deadlocking the system.

Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-26 13:42:54 -07:00
Daniel Vetter
2301002769 mutex: Add w/w mutex slowpath debugging
Injects EDEADLK conditions at pseudo-random interval, with
exponential backoff up to UINT_MAX (to ensure that every lock
operation still completes in a reasonable time).

This way we can test the wound slowpath even for ww mutex users
where contention is never expected, and the ww deadlock
avoidance algorithm is only needed for correctness against
malicious userspace. An example would be protecting kernel
modesetting properties, which thanks to single-threaded X isn't
really expected to contend, ever.

I've looked into using the CONFIG_FAULT_INJECTION
infrastructure, but decided against it for two reasons:

- EDEADLK handling is mandatory for ww mutex users and should
  never affect the outcome of a syscall. This is in contrast to -ENOMEM
  injection. So fine configurability isn't required.

- The fault injection framework only allows to set a simple
  probability for failure. Now the probability that a ww mutex acquire
  stage with N locks will never complete (due to too many injected
  EDEADLK backoffs) is zero. But the expected number of ww_mutex_lock
  operations for the completely uncontended case would be O(exp(N)).
  The per-acuiqire ctx exponential backoff solution choosen here only
  results in O(log N) overhead due to injection and so O(log N * N)
  lock operations. This way we can fail with high probability (and so
  have good test coverage even for fancy backoff and lock acquisition
  paths) without running into patalogical cases.

Note that EDEADLK will only ever be injected when we managed to
acquire the lock. This prevents any behaviour changes for users
which rely on the EALREADY semantics.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: dri-devel@lists.freedesktop.org
Cc: linaro-mm-sig@lists.linaro.org
Cc: rostedt@goodmis.org
Cc: daniel@ffwll.ch
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20130620113117.4001.21681.stgit@patser
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-26 12:10:56 +02:00
Maarten Lankhorst
040a0a3710 mutex: Add support for wound/wait style locks
Wound/wait mutexes are used when other multiple lock
acquisitions of a similar type can be done in an arbitrary
order. The deadlock handling used here is called wait/wound in
the RDBMS literature: The older tasks waits until it can acquire
the contended lock. The younger tasks needs to back off and drop
all the locks it is currently holding, i.e. the younger task is
wounded.

For full documentation please read Documentation/ww-mutex-design.txt.

References: https://lwn.net/Articles/548909/
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: dri-devel@lists.freedesktop.org
Cc: linaro-mm-sig@lists.linaro.org
Cc: rostedt@goodmis.org
Cc: daniel@ffwll.ch
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/51C8038C.9000106@canonical.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-26 12:10:56 +02:00
Maarten Lankhorst
a41b56efa7 arch: Make __mutex_fastpath_lock_retval return whether fastpath succeeded or not
This will allow me to call functions that have multiple
arguments if fastpath fails. This is required to support ticket
mutexes, because they need to be able to pass an extra argument
to the fail function.

Originally I duplicated the functions, by adding
__mutex_fastpath_lock_retval_arg. This ended up being just a
duplication of the existing function, so a way to test if
fastpath was called ended up being better.

This also cleaned up the reservation mutex patch some by being
able to call an atomic_set instead of atomic_xchg, and making it
easier to detect if the wrong unlock function was previously
used.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: dri-devel@lists.freedesktop.org
Cc: linaro-mm-sig@lists.linaro.org
Cc: robclark@gmail.com
Cc: rostedt@goodmis.org
Cc: daniel@ffwll.ch
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20130620113105.4001.83929.stgit@patser
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-26 12:10:55 +02:00
Michael Opdenacker
bfd63cd24d driver core: device.h: fix doc compilation warnings
This patch fixes the below 3 warnings running "make htmldocs",
by adding descriptions for recently added structure members:

DOCPROC Documentation/DocBook/device-drivers.xml
Warning(/work/git.free-electrons.com/users/michael-opdenacker/linux//include/linux/device.h:116): No description found for parameter 'lock_key'
Warning(/work/git.free-electrons.com/users/michael-opdenacker/linux//include/linux/device.h:723): No description found for parameter 'cma_area'
Warning(/work/git.free-electrons.com/users/michael-opdenacker/linux//include/linux/device.h:723): No description found for parameter 'iommu_group'

Don't hesitate to propose better descriptions!

Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-25 21:20:41 -07:00
Eric Dumazet
bd8a7036c0 gre: fix a possible skb leak
commit 68c3316311 ("v4 GRE: Add TCP segmentation offload for GRE")
added a possible skb leak, because it frees only the head of segment
list, in case a skb_linearize() call fails.

This patch adds a kfree_skb_list() helper to fix the bug.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Pravin B Shelar <pshelar@nicira.com>
Cc: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-25 16:07:44 -07:00
Zhang Yi
13d60f4b6a futex: Take hugepages into account when generating futex_key
The futex_keys of process shared futexes are generated from the page
offset, the mapping host and the mapping index of the futex user space
address. This should result in an unique identifier for each futex.

Though this is not true when futexes are located in different subpages
of an hugepage. The reason is, that the mapping index for all those
futexes evaluates to the index of the base page of the hugetlbfs
mapping. So a futex at offset 0 of the hugepage mapping and another
one at offset PAGE_SIZE of the same hugepage mapping have identical
futex_keys. This happens because the futex code blindly uses
page->index.

Steps to reproduce the bug:

1. Map a file from hugetlbfs. Initialize pthread_mutex1 at offset 0
   and pthread_mutex2 at offset PAGE_SIZE of the hugetlbfs
   mapping.

   The mutexes must be initialized as PTHREAD_PROCESS_SHARED because
   PTHREAD_PROCESS_PRIVATE mutexes are not affected by this issue as
   their keys solely depend on the user space address.

2. Lock mutex1 and mutex2

3. Create thread1 and in the thread function lock mutex1, which
   results in thread1 blocking on the locked mutex1.

4. Create thread2 and in the thread function lock mutex2, which
   results in thread2 blocking on the locked mutex2.

5. Unlock mutex2. Despite the fact that mutex2 got unlocked, thread2
   still blocks on mutex2 because the futex_key points to mutex1.

To solve this issue we need to take the normal page index of the page
which contains the futex into account, if the futex is in an hugetlbfs
mapping. In other words, we calculate the normal page mapping index of
the subpage in the hugetlbfs mapping.

Mappings which are not based on hugetlbfs are not affected and still
use page->index.

Thanks to Mel Gorman who provided a patch for adding proper evaluation
functions to the hugetlbfs code to avoid exposing hugetlbfs specific
details to the futex code.

[ tglx: Massaged changelog ]

Signed-off-by: Zhang Yi <zhang.yi20@zte.com.cn>
Reviewed-by: Jiang Biao <jiang.biao2@zte.com.cn>
Tested-by: Ma Chenggong <ma.chenggong@zte.com.cn>
Reviewed-by: 'Mel Gorman' <mgorman@suse.de>
Acked-by: 'Darren Hart' <dvhart@linux.intel.com>
Cc: 'Peter Zijlstra' <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/000101ce71a6%24a83c5880%24f8b50980%24@com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-25 23:11:19 +02:00
Javier Martinez Canillas
1f6236bfd7 genirq: Add irq_get_trigger_type() to get IRQ flags
Drivers that want to get the trigger edge/level type flags for a given
interrupt have to call irq_get_irq_data(irq) to get the struct
irq_data and then irqd_get_trigger_type(irq_data) to obtain the IRQ
flags.

This is not only error prone but also unnecessary exposes the struct
irq_data to callers.

It's better to have an irq_get_trigger_type() function to obtain the
edge/level flags for an IRQ.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: Grant Likely <grant.likely@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@linux-mips.org
Link: http://lkml.kernel.org/r/1371228049-27080-2-git-send-email-javier.martinez@collabora.co.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-06-25 11:48:24 +02:00
Alexander Shishkin
8e22978c57 usb: chipidea: drop "13xxx" infix
"ci13xxx" is bad for at least the following reasons:
  * people often mistype it
  * it doesn't add any informational value to the names it's used in
  * it needlessly attracts mail filters

This patch replaces it with "ci_hdrc", "ci_udc" or "ci_hw", depending
on the situation. Modules with ci13xxx prefix are also renamed accordingly
and aliases are added for compatibility. Otherwise, no functional changes.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-24 16:16:55 -07:00
Peter Chen
848d5b9121 usb: fix build error without CONFIG_USB_PHY
on i386:

drivers/built-in.o: In function `ci_hdrc_probe':
core.c:(.text+0x20446b): undefined reference to `of_usb_get_phy_mode'

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-24 16:15:26 -07:00
Greg Kroah-Hartman
f797d37ead Merge 3.10-rc7 into usb-next
We want the USB fixes and other good stuff in this branch as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-24 15:20:26 -07:00
Greg Kroah-Hartman
805bf3daf3 Merge 3.10-rc7 into tty-next
We want the tty fixes in this branch as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-24 15:17:53 -07:00