1. 05 May, 2013 39 commits
    • Brian King's avatar
      powerpc/pseries: Force 32 bit MSIs for devices that require it · e61133dd
      Brian King authored
      The following patch implements a new PAPR change which allows
      the OS to force the use of 32 bit MSIs, regardless of what
      the PCI capabilities indicate. This is required for some
      devices that advertise support for 64 bit MSIs but don't
      actually support them.
      Signed-off-by: default avatarBrian King <brking@linux.vnet.ibm.com>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    • Michael Neuling's avatar
      powerpc/tm: Fix null pointer deference in flush_hash_page · c2fd22df
      Michael Neuling authored
      Make sure that current->thread.reg exists before we deference it in
      Signed-off-by: default avatarMichael Neuling <mikey@neuling.org>
      Reported-by: default avatarJohn J Miller <millerjo@us.ibm.com>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    • Jeremy Kerr's avatar
      powerpc/powernv: Defer OPAL exception handler registration · c4463b37
      Jeremy Kerr authored
      Currently, the OPAL exception vectors are registered before the feature
      fixups are processed. This means that the now-firmware-owned vectors
      will likely be overwritten by the kernel.
      This change moves the exception registration code to an early initcall,
      rather than at machine_init time.
      Signed-off-by: default avatarJeremy Kerr <jk@ozlabs.org>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    • Anton Blanchard's avatar
      powerpc: Emulate non privileged DSCR read and write · 73d2fb75
      Anton Blanchard authored
      POWER8 allows read and write of the DSCR in userspace. We added
      kernel emulation so applications could always use the instructions
      regardless of the CPU type.
      Unfortunately there are two SPRs for the DSCR and we only added
      emulation for the privileged one. Add code to match the non
      privileged one.
      A simple test was created to verify the fix:
      Without the patch we get a SIGILL and it passes with the patch.
      Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
      Cc: <stable@kernel.org>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    • Linus Torvalds's avatar
      Merge tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 01227a88
      Linus Torvalds authored
      Pull kvm updates from Gleb Natapov:
       "Highlights of the updates are:
         - new emulated device API
         - legacy device assignment is now optional
         - irqfd interface is more generic and can be shared between arches
         - VMCS shadow support and other nested VMX improvements
         - APIC virtualization and Posted Interrupt hardware support
         - Optimize mmio spte zapping
          - BookE: in-kernel MPIC emulation with irqfd support
          - Book3S: in-kernel XICS emulation (incomplete)
          - Book3S: HV: migration fixes
          - BookE: more debug support preparation
          - BookE: e6500 support
         - reworking of Hyp idmaps
         - ioeventfd for virtio-ccw
        And many other bug fixes, cleanups and improvements"
      * tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (204 commits)
        kvm: Add compat_ioctl for device control API
        KVM: x86: Account for failing enable_irq_window for NMI window request
        KVM: PPC: Book3S: Add API for in-kernel XICS emulation
        kvm/ppc/mpic: fix missing unlock in set_base_addr()
        kvm/ppc: Hold srcu lock when calling kvm_io_bus_read/write
        kvm/ppc/mpic: remove users
        kvm/ppc/mpic: fix mmio region lists when multiple guests used
        kvm/ppc/mpic: remove default routes from documentation
        kvm: KVM_CAP_IOMMU only available with device assignment
        ARM: KVM: iterate over all CPUs for CPU compatibility check
        KVM: ARM: Fix spelling in error message
        ARM: KVM: define KVM_ARM_MAX_VCPUS unconditionally
        KVM: ARM: Fix API documentation for ONE_REG encoding
        ARM: KVM: promote vfp_host pointer to generic host cpu context
        ARM: KVM: add architecture specific hook for capabilities
        ARM: KVM: perform HYP initilization for hotplugged CPUs
        ARM: KVM: switch to a dual-step HYP init code
        ARM: KVM: rework HYP page table freeing
        ARM: KVM: enforce maximum size for identity mapped code
        ARM: KVM: move to a KVM provided HYP idmap
    • David Howells's avatar
      Give the OID registry file module info to avoid kernel tainting · 9e687946
      David Howells authored
      Give the OID registry file module information so that it doesn't taint the
      kernel when compiled as a module and loaded.
      Reported-by: default avatarDros Adamson <Weston.Adamson@netapp.com>
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      cc: Trond Myklebust <Trond.Myklebust@netapp.com>
      cc: stable@vger.kernel.org
      cc: linux-nfs@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Linus Torvalds's avatar
      Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 534c97b0
      Linus Torvalds authored
      Pull 'full dynticks' support from Ingo Molnar:
       "This tree from Frederic Weisbecker adds a new, (exciting! :-) core
        kernel feature to the timer and scheduler subsystems: 'full dynticks',
        or CONFIG_NO_HZ_FULL=y.
        This feature extends the nohz variable-size timer tick feature from
        idle to busy CPUs (running at most one task) as well, potentially
        reducing the number of timer interrupts significantly.
        This feature got motivated by real-time folks and the -rt tree, but
        the general utility and motivation of full-dynticks runs wider than
         - HPC workloads get faster: CPUs running a single task should be able
           to utilize a maximum amount of CPU power.  A periodic timer tick at
           HZ=1000 can cause a constant overhead of up to 1.0%.  This feature
           removes that overhead - and speeds up the system by 0.5%-1.0% on
           typical distro configs even on modern systems.
         - Real-time workload latency reduction: CPUs running critical tasks
           should experience as little jitter as possible.  The last remaining
           source of kernel-related jitter was the periodic timer tick.
         - A single task executing on a CPU is a pretty common situation,
           especially with an increasing number of cores/CPUs, so this feature
           helps desktop and mobile workloads as well.
        The cost of the feature is mainly related to increased timer
        reprogramming overhead when a CPU switches its tick period, and thus
        slightly longer to-idle and from-idle latency.
        Configuration-wise a third mode of operation is added to the existing
        two NOHZ kconfig modes:
         - CONFIG_HZ_PERIODIC: [formerly !CONFIG_NO_HZ], now explicitly named
           as a config option.  This is the traditional Linux periodic tick
           design: there's a HZ tick going on all the time, regardless of
           whether a CPU is idle or not.
         - CONFIG_NO_HZ_IDLE: [formerly CONFIG_NO_HZ=y], this turns off the
           periodic tick when a CPU enters idle mode.
         - CONFIG_NO_HZ_FULL: this new mode, in addition to turning off the
           tick when a CPU is idle, also slows the tick down to 1 Hz (one
           timer interrupt per second) when only a single task is running on a
        The .config behavior is compatible: existing !CONFIG_NO_HZ and
        CONFIG_NO_HZ=y settings get translated to the new values, without the
        user having to configure anything.  CONFIG_NO_HZ_FULL is turned off by
        This feature is based on a lot of infrastructure work that has been
        steadily going upstream in the last 2-3 cycles: related RCU support
        and non-periodic cputime support in particular is upstream already.
        This tree adds the final pieces and activates the feature.  The pull
        request is marked RFC because:
         - it's marked 64-bit only at the moment - the 32-bit support patch is
           small but did not get ready in time.
         - it has a number of fresh commits that came in after the merge
           window.  The overwhelming majority of commits are from before the
           merge window, but still some aspects of the tree are fresh and so I
           marked it RFC.
         - it's a pretty wide-reaching feature with lots of effects - and
           while the components have been in testing for some time, the full
           combination is still not very widely used.  That it's default-off
           should reduce its regression abilities and obviously there are no
           known regressions with CONFIG_NO_HZ_FULL=y enabled either.
         - the feature is not completely idempotent: there is no 100%
           equivalent replacement for a periodic scheduler/timer tick.  In
           particular there's ongoing work to map out and reduce its effects
           on scheduler load-balancing and statistics.  This should not impact
           correctness though, there are no known regressions related to this
           feature at this point.
         - it's a pretty ambitious feature that with time will likely be
           enabled by most Linux distros, and we'd like you to make input on
           its design/implementation, if you dislike some aspect we missed.
           Without flaming us to crisp! :-)
        Future plans:
         - there's ongoing work to reduce 1Hz to 0Hz, to essentially shut off
           the periodic tick altogether when there's a single busy task on a
           CPU.  We'd first like 1 Hz to be exposed more widely before we go
           for the 0 Hz target though.
         - once we reach 0 Hz we can remove the periodic tick assumption from
           nr_running>=2 as well, by essentially interrupting busy tasks only
           as frequently as the sched_latency constraints require us to do -
           once every 4-40 msecs, depending on nr_running.
        I am personally leaning towards biting the bullet and doing this in
        v3.10, like the -rt tree this effort has been going on for too long -
        but the final word is up to you as usual.
        More technical details can be found in Documentation/timers/NO_HZ.txt"
      * 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (39 commits)
        sched: Keep at least 1 tick per second for active dynticks tasks
        rcu: Fix full dynticks' dependency on wide RCU nocb mode
        nohz: Protect smp_processor_id() in tick_nohz_task_switch()
        nohz_full: Add documentation.
        cputime_nsecs: use math64.h for nsec resolution conversion helpers
        nohz: Select VIRT_CPU_ACCOUNTING_GEN from full dynticks config
        nohz: Reduce overhead under high-freq idling patterns
        nohz: Remove full dynticks' superfluous dependency on RCU tree
        nohz: Fix unavailable tick_stop tracepoint in dynticks idle
        nohz: Add basic tracing
        nohz: Select wide RCU nocb for full dynticks
        nohz: Disable the tick when irq resume in full dynticks CPU
        nohz: Re-evaluate the tick for the new task after a context switch
        nohz: Prepare to stop the tick on irq exit
        nohz: Implement full dynticks kick
        nohz: Re-evaluate the tick from the scheduler IPI
        sched: New helper to prevent from stopping the tick in full dynticks
        sched: Kick full dynticks CPU that have more than one task enqueued.
        perf: New helper to prevent full dynticks CPUs from stopping tick
        perf: Kick full dynticks CPU if events rotation is needed
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 64049d19
      Linus Torvalds authored
      Pull perf fixes from Ingo Molnar:
       "Misc fixes plus a small hw-enablement patch for Intel IB model 58
        uncore events"
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/x86/intel/lbr: Demand proper privileges for PERF_SAMPLE_BRANCH_KERNEL
        perf/x86/intel/lbr: Fix LBR filter
        perf/x86: Blacklist all MEM_*_RETIRED events for Ivy Bridge
        perf: Fix vmalloc ring buffer pages handling
        perf/x86/intel: Fix unintended variable name reuse
        perf/x86/intel: Add support for IvyBridge model 58 Uncore
        perf/x86/intel: Fix typo in perf_event_intel_uncore.c
        x86: Eliminate irq_mis_count counted in arch_irq_stat
    • Linus Torvalds's avatar
      Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux · f8ce1faf
      Linus Torvalds authored
      Pull mudule updates from Rusty Russell:
       "We get rid of the general module prefix confusion with a binary config
        option, fix a remove/insert race which Never Happens, and (my
        favorite) handle the case when we have too many modules for a single
        commandline.  Seriously, the kernel is full, please go away!"
      * tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
        modpost: fix unwanted VMLINUX_SYMBOL_STR expansion
        X.509: Support parse long form of length octets in Authority Key Identifier
        module: don't unlink the module until we've removed all exposure.
        kernel: kallsyms: memory override issue, need check destination buffer length
        MODSIGN: do not send garbage to stderr when enabling modules signature
        modpost: handle huge numbers of modules.
        modpost: add -T option to read module names from file/stdin.
        modpost: minor cleanup.
        genksyms: pass symbol-prefix instead of arch
        module: fix symbol versioning with symbol prefixes
        CONFIG_SYMBOL_PREFIX: cleanup.
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 24d0c254
      Linus Torvalds authored
      Pull single_open() leak fixes from Al Viro:
       "A bunch of fixes for a moderately common class of bugs: file with
        single_open() done by its ->open() and seq_release as its ->release().
        That leaks; fortunately, it's not _too_ common (either people manage
        to RTFM that says "When using single_open(), the programmer should use
        single_release() instead of seq_release() in the file_operations
        structure to avoid a memory leak", or they just copy a correct
        instance), but grepping through the tree has caught quite a pile.
        All of that is, AFAICS, -stable fodder, for as far as the patches
        apply.  I tried to carve it up into reasonably-sized pieces (more or
        less "comes from the same tree")"
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        rcutrace: single_open() leaks
        gadget: single_open() leaks
        staging: single_open() leaks
        megaraid: single_open() leak
        wireless: single_open() leaks
        input: single_open() leak
        rtc: single_open() leaks
        ds1620: single_open() leak
        sh: single_open() leaks
        parisc: single_open() leaks
        mips: single_open() leaks
        ia64: single_open() leaks
        h8300: single_open() leaks
        cris: single_open() leaks
        arm: single_open() leaks
    • Linus Torvalds's avatar
      Merge branch 'ipc-cleanups' · 802d0db8
      Linus Torvalds authored
      Merge ipc fixes and cleanups from my IPC branch.
      The ipc locking has always been pretty ugly, and the scalability fixes
      to some degree made it even less readable.  We had two cases of double
      unlocks in error paths due to this (one rcu read unlock, one semaphore
      unlock), and this fixes the bugs I found while trying to clean things up
      a bit so that we are less likely to have more.
      * ipc-cleanups:
        ipc: simplify rcu_read_lock() in semctl_nolock()
        ipc: simplify semtimedop/semctl_main() common error path handling
        ipc: move sem_obtain_lock() rcu locking into the only caller
        ipc: fix double sem unlock in semctl error path
        ipc: move the rcu_read_lock() from sem_lock_and_putref() into callers
        ipc: sem_putref() does not need the semaphore lock any more
        ipc: move rcu_read_unlock() out of sem_unlock() and into callers
    • Scott Wood's avatar
      kvm: Add compat_ioctl for device control API · db6ae615
      Scott Wood authored
      This API shouldn't have 32/64-bit issues, but VFS assumes it does
      unless told otherwise.
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
    • Peter Zijlstra's avatar
      perf/x86/intel/lbr: Demand proper privileges for PERF_SAMPLE_BRANCH_KERNEL · 7cc23cd6
      Peter Zijlstra authored
      We should always have proper privileges when requesting kernel
      Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: <stable@kernel.org>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: eranian@google.com
      Link: http://lkml.kernel.org/r/20130503121256.230745028@chello.nl
      [ Fix build error reported by fengguang.wu@intel.com, propagate error code back. ]
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      Link: http://lkml.kernel.org/n/tip-v0x9ky3ahzr6nm3c6ilwrili@git.kernel.org
    • Al Viro's avatar
      rcutrace: single_open() leaks · 7ee2b9e5
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      gadget: single_open() leaks · 962a1ab2
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      staging: single_open() leaks · bae301d3
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      megaraid: single_open() leak · 9bec8a74
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      wireless: single_open() leaks · bc3041f0
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      input: single_open() leak · 9b3a0a6f
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      rtc: single_open() leaks · 2e7718cf
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      ds1620: single_open() leak · 7485e16c
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      sh: single_open() leaks · c39b9fd7
      Al Viro authored
      Cc: vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      parisc: single_open() leaks · 46d4c0ff
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      mips: single_open() leaks · acf300dd
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      ia64: single_open() leaks · 75401461
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      h8300: single_open() leaks · a81ecc16
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      cris: single_open() leaks · f42787df
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      arm: single_open() leaks · b11ac20e
      Al Viro authored
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 1aaf6d3d
      Linus Torvalds authored
      Pull networking fixes from David Miller:
       1) Several routines do not use netdev_features_t to hold such bitmasks,
          fixes from Patrick McHardy and Bjørn Mork.
       2) Update cpsw IRQ software state and the actual HW irq enabling in the
          correct order.  From Mugunthan V N.
       3) When sending tipc packets to multiple bearers, we have to make
          copies of the SKB rather than just giving the original SKB directly.
          Fix from Gerlando Falauto.
       4) Fix race with bridging topology change timer, from Stephen
       5) Fix TCPv6 segmentation handling in GRE and VXLAN, from Pravin B
       6) Endian bug in USB pegasus driver, from Dan Carpenter.
       7) Fix crashes on MTU reduction in USB asix driver, from Holger
       8) Don't allow the kernel to BUG() just because the user puts some crap
          in an AF_PACKET mmap() ring descriptor.  Fix from Daniel Borkmann.
       9) Don't use variable sized arrays on the stack in xen-netback, from
          Wei Liu.
      10) Fix stats reporting and an unbalanced napi_disable() in be2net
          driver.  From Somnath Kotur and Ajit Khaparde.
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (25 commits)
        cxgb4: fix error recovery when t4_fw_hello returns a positive value
        sky2: Fix crash on receiving VLAN frames
        packet: tpacket_v3: do not trigger bug() on wrong header status
        asix: fix BUG in receive path when lowering MTU
        net: qmi_wwan: Add Telewell TW-LTE 4G
        usbnet: pegasus: endian bug in write_mii_word()
        vxlan: Fix TCPv6 segmentation.
        gre: Fix GREv4 TCPv6 segmentation.
        bridge: fix race with topology change timer
        tipc: pskb_copy() buffers when sending on more than one bearer
        tipc: tipc_bcbearer_send(): simplify bearer selection
        tipc: cosmetic: clean up comments and break a long line
        drivers: net: cpsw: irq not disabled in cpsw isr in particular sequence
        xen-netback: better names for thresholds
        xen-netback: avoid allocating variable size array on stack
        xen-netback: remove redundent parameter in netbk_count_requests
        be2net: Fix to fail probe if MSI-X enable fails for a VF
        be2net: avoid napi_disable() when it has not been enabled
        be2net: Fix firmware download for Lancer
        be2net: Fix to receive Multicast Packets when Promiscuous mode is enabled on certain devices
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next · f589e9bf
      Linus Torvalds authored
      Pull sparc updates from David Miller:
       1) Hibernation support, as well as removal of excess interrupt
          twiddling in MMU context allocation on sparc64 from Kirill Tkhai.
       2) Kill references to __ARCH_WANT_UNLOCKED_CTXSW.
       3) Sparc32 LEON bug fixes from Daniel Hellstrom and Andreas Larsson.
       4) Provide cmpxchg64(), from Geert Uytterhoeven.
       5) Device refcount and registry bug fixes from Federico Vaga and Wei
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next:
        serial: sunsu: add missing platform_driver_unregister() when module exit
        sparc32, leon: Do not overwrite previously set irq flow handlers
        sparc/kernel/vio.c: add put_device() after device_find_child()
        sparc64: Do not save/restore interrupts in get_new_mmu_context()
        sparc: Consistently use 'wr' and 'rd' instructions for ASRs.
        sparc64: Kill __ARCH_WANT_UNLOCKED_CTXSW
        sparc64: Provide cmpxchg64()
        sparc64: Do not change num_physpages during initmem freeing
        sparc64: Hibernation support
        sparc,leon: updated GRPCI2 config name
        sparc,leon: support for GRPCI1 PCI host bridge controller
        sparc32,leon: add support for PCI busn resource for GRPCI2
    • David S. Miller's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · 048c9acc
      David S. Miller authored
      Merge sparc bug fixes that didn't make it into v3.9 into
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    • Wei Yongjun's avatar
      serial: sunsu: add missing platform_driver_unregister() when module exit · ad348cc5
      Wei Yongjun authored
      We have registered platform driver when module init, and
      need unregister it when module exit.
      Signed-off-by: default avatarWei Yongjun <yongjun_wei@trendmicro.com.cn>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    • Andreas Larsson's avatar
      sparc32, leon: Do not overwrite previously set irq flow handlers · 6e4741e7
      Andreas Larsson authored
      This is needed because when scan_of_devices finds the GAISLER_GPTIMER
      core that corresponds to the SMP "ticker" timer, the previously set
      proper irq flow handler gets overwritten with an incorrect one. This
      leads to very flaky timer interrupt handling on some hardware. Proper
      updates to handlers can still be done using leon_update_virq_handling.
      Signed-off-by: default avatarAndreas Larsson <andreas@gaisler.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    • Federico Vaga's avatar
      sparc/kernel/vio.c: add put_device() after device_find_child() · 75e44803
      Federico Vaga authored
      The vio_remove() function uses device_find_child() but it does not drop
      the reference of the retrieved child.
      Signed-off-by: default avatarFederico Vaga <federico.vaga@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    • Linus Torvalds's avatar
      ipc: simplify rcu_read_lock() in semctl_nolock() · 941b0304
      Linus Torvalds authored
      This trivially combines two rcu_read_lock() calls in both sides of a
      if-statement into one single one in front of the if-statement.
      Split out as an independent cleanup from the previous commit.
      Acked-by: default avatarDavidlohr Bueso <davidlohr.bueso@hp.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Linus Torvalds's avatar
      ipc: simplify semtimedop/semctl_main() common error path handling · c728b9c8
      Linus Torvalds authored
      With various straight RCU lock/unlock movements, one common exit path
      pattern had become
      	goto out_wakeup;
      and in fact there were no cases where we wanted to exit to out_wakeup
      _without_ releasing the RCU read lock.
      So replace that pattern with "goto out_rcu_wakeup", and remove the old
      Acked-by: default avatarDavidlohr Bueso <davidlohr.bueso@hp.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Linus Torvalds's avatar
      ipc: move sem_obtain_lock() rcu locking into the only caller · 321310ce
      Linus Torvalds authored
      sem_obtain_lock() was another of those functions that returned with the
      RCU lock held for reading in the success case.  Move the RCU locking to
      the caller (semtimedop()), making it more obvious.  We already did RCU
      locking elsewhere in that function.
      Side note: why does semtimedop() re-do the semphore lookup after the
      sleep, rather than just getting a reference to the semaphore it already
      looked up originally?
      Acked-by: default avatarDavidlohr Bueso <davidlohr.bueso@hp.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Linus Torvalds's avatar
      ipc: fix double sem unlock in semctl error path · fbfd1d28
      Linus Torvalds authored
      Fix another ipc locking buglet introduced by the scalability patches:
      when semctl_down() was changed to delay the semaphore locking, one error
      path for security_sem_semctl() went through the semaphore unlock logic
      even though the semaphore had never been locked.
      Introduced by commit 16df3674
       ("ipc,sem: do not hold ipc lock more
      than necessary")
      Acked-by: default avatarDavidlohr Bueso <davidlohr.bueso@hp.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Linus Torvalds's avatar
      ipc: move the rcu_read_lock() from sem_lock_and_putref() into callers · 4091fd94
      Linus Torvalds authored
      This is another ipc semaphore locking cleanup, trying to make the
      locking more straightforward.  We move the rcu read locking into the
      callers of sem_lock_and_putref(), which in general means that we now
      mostly do the rcu_read_lock() and rcu_read_unlock() in the same
      Mostly.  We still have the ipc_addid/newary/freeary mess, and things
      like ipcctl_pre_down_nolock().
      Acked-by: default avatarDavidlohr Bueso <davidlohr.bueso@hp.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
  2. 04 May, 2013 1 commit
    • Linus Torvalds's avatar
      Merge tag 'mmc-updates-for-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc · 17319295
      Linus Torvalds authored
      Pull MMC update from Chris Ball:
       "MMC highlights for 3.10:
         - Introduce MMC_CAP2_NO_PRESCAN_POWERUP to allow skipping
           mmc_power_up() at boot/initialization time if it's already
           happened, for performance (faster boot time) reasons.
         - Fix a bit width test failure that resulted in old eMMC cards being
           put into 1-bit mode when 4-bit mode was available.
         - Expose fwrev/hwrev for MMCv4 parts.
         - Improve card removal logic in the case where the card's removed
           slowly; we were missing card removal events if the card retained
           contact with the slot pads for long enough to reply to a CMD13
           while being removed.
         - davinci_mmc: Support using PIO instead of DMA.
         - dw_mmc: Add support for Exynos4412.
         - mxcmmc: DT support, use slot-gpio API.
         - mxs-mmc: Add broken-cd/cd-inverted/non-removable DT property
         - sdhci-sirf: New sdhci-pltfm driver for CSR SiRF SoCs:
             SiRFprimaII: unicore ARM Cortex-A9
             SiRFatlas6: unicore ARM Cortex-A9
             SiRFmarco: dual core ARM Cortex-A9 SMP
         - sdhci-tegra: Add support for Tegra114 platforms, use
      * tag 'mmc-updates-for-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (66 commits)
        mmc: sdhci-tegra: fix MODULE_DEVICE_TABLE
        mmc: core: fix init controller performance regression, updated patch
        mmc: mxcmmc: enable DMA support on mpc512x
        mmc: mxcmmc: constify mxcmci_devtype
        mmc: mxcmmc: use slot-gpio API for write-protect detection
        mmc: mxcmmc: add mpc512x SDHC support
        mmc: mxcmmc: fix race conditions for host->req and host->data access
        mmc: mxcmmc: DT support
        mmc: dw_mmc: let device core setup the default pin configuration
        mmc: mxs-mmc: add broken-cd property
        mmc: mxs-mmc: add non-removable property
        mmc: mxs-mmc: add cd-inverted property
        mmc: core: call pm_runtime_put_noidle in pm_runtime_get_sync failed case
        mmc: mxcmmc: Fix bug when card is present during boot
        mmc: core: fix performance regression initializing MMC host controllers
        Revert "mmc: core: wait while adding MMC host to ensure root mounts successfully"
        mmc: atmel-mci: pio hang on block errors
        mmc: core: Fix bit width test failing on old eMMC cards
        mmc: dw_mmc: Use pr_info instead of printk
        mmc: dw_mmc: Check return value of regulator_enable