1. 01 Aug, 2017 11 commits
    • Grygorii Strashko's avatar
      ptp: introduce ptp auxiliary worker · d9535cb7
      Grygorii Strashko authored
      Many PTP drivers required to perform some asynchronous or periodic work,
      like periodically handling PHC counter overflow or handle delayed timestamp
      for RX/TX network packets. In most of the cases, such work is implemented
      using workqueues. Unfortunately, Kernel workqueues might introduce
      significant delay in work scheduling under high system load and on -RT,
      which could cause misbehavior of PTP drivers due to internal counter
      overflow, for example, and there is no way to tune its execution policy and
      priority manuallly.
      
      Hence, The kthread_worker can be used insted of workqueues, as it create
      separte named kthread for each worker and its its execution policy and
      priority can be configured using chrt tool.
      
      This prblem was reported for two drivers TI CPSW CPTS and dp83640, so
      instead of modifying each of these driver it was proposed to add PTP
      auxiliary worker to the PHC subsystem.
      
      The patch adds PTP auxiliary worker in PHC subsystem using kthread_worker
      and kthread_delayed_work and introduces two new PHC subsystem APIs:
      
      - long (*do_aux_work)(struct ptp_clock_info *ptp) callback in
      ptp_clock_info structure, which driver should assign if it require to
      perform asynchronous or periodic work. Driver should return the delay of
      the PTP next auxiliary work scheduling time (>=0) or negative value in case
      further scheduling is not required.
      
      - int ptp_schedule_worker(struct ptp_clock *ptp, unsigned long delay) which
      allows schedule PTP auxiliary work.
      
      The name of kthread_worker thread corresponds PTP PHC device name "ptp%d".
      Signed-off-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d9535cb7
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · bc78d646
      Linus Torvalds authored
      Pull networking fixes from David Miller:
      
       1) Handle notifier registry failures properly in tun/tap driver, from
          Tonghao Zhang.
      
       2) Fix bpf verifier handling of subtraction bounds and add a testcase
          for this, from Edward Cree.
      
       3) Increase reset timeout in ftgmac100 driver, from Ben Herrenschmidt.
      
       4) Fix use after free in prd_retire_rx_blk_timer_exired() in AF_PACKET,
          from Cong Wang.
      
       5) Fix SElinux regression due to recent UDP optimizations, from Paolo
          Abeni.
      
       6) We accidently increment IPSTATS_MIB_FRAGFAILS in the ipv6 code
          paths, fix from Stefano Brivio.
      
       7) Fix some mem leaks in dccp, from Xin Long.
      
       8) Adjust MDIO_BUS kconfig deps to avoid build errors, from Arnd
          Bergmann.
      
       9) Mac address length check and buffer size fixes from Cong Wang.
      
      10) Don't leak sockets in ipv6 udp early demux, from Paolo Abeni.
      
      11) Fix return value when copy_from_user() fails in
          bpf_prog_get_info_by_fd(), from Daniel Borkmann.
      
      12) Handle PHY_HALTED properly in phy library state machine, from
          Florian Fainelli.
      
      13) Fix OOPS in fib_sync_down_dev(), from Ido Schimmel.
      
      14) Fix truesize calculation in virtio_net which led to performance
          regressions, from Michael S Tsirkin.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (76 commits)
        samples/bpf: fix bpf tunnel cleanup
        udp6: fix jumbogram reception
        ppp: Fix a scheduling-while-atomic bug in del_chan
        Revert "net: bcmgenet: Remove init parameter from bcmgenet_mii_config"
        virtio_net: fix truesize for mergeable buffers
        mv643xx_eth: fix of_irq_to_resource() error check
        MAINTAINERS: Add more files to the PHY LIBRARY section
        ipv4: fib: Fix NULL pointer deref during fib_sync_down_dev()
        net: phy: Correctly process PHY_HALTED in phy_stop_machine()
        sunhme: fix up GREG_STAT and GREG_IMASK register offsets
        bpf: fix bpf_prog_get_info_by_fd to dump correct xlated_prog_len
        tcp: avoid bogus gcc-7 array-bounds warning
        net: tc35815: fix spelling mistake: "Intterrupt" -> "Interrupt"
        bpf: don't indicate success when copy_from_user fails
        udp6: fix socket leak on early demux
        net: thunderx: Fix BGX transmit stall due to underflow
        Revert "vhost: cache used event for better performance"
        team: use a larger struct for mac address
        net: check dev->addr_len for dev_set_mac_address()
        phy: bcm-ns-usb3: fix MDIO_BUS dependency
        ...
      bc78d646
    • William Tu's avatar
      samples/bpf: fix bpf tunnel cleanup · cc75f851
      William Tu authored
      test_tunnel_bpf.sh fails to remove the vxlan11 tunnel device, causing the
      next geneve tunnelling test case fails.  In addition, the geneve reserved bit
      in tcbpf2_kern.c should be zero, according to the RFC.
      Signed-off-by: default avatarWilliam Tu <u9012063@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      cc75f851
    • Paolo Abeni's avatar
      udp6: fix jumbogram reception · cb891fa6
      Paolo Abeni authored
      Since commit 67a51780 ("ipv6: udp: leverage scratch area
      helpers") udp6_recvmsg() read the skb len from the scratch area,
      to avoid a cache miss.
      But the UDP6 rx path support RFC 2675 UDPv6 jumbograms, and their
      length exceeds the 16 bits available in the scratch area. As a side
      effect the length returned by recvmsg() is:
      <ingress datagram len> % (1<<16)
      
      This commit addresses the issue allocating one more bit in the
      IP6CB flags field and setting it for incoming jumbograms.
      Such field is still in the first cacheline, so at recvmsg()
      time we can check it and fallback to access skb->len if
      required, without a measurable overhead.
      
      Fixes: 67a51780 ("ipv6: udp: leverage scratch area helpers")
      Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      cb891fa6
    • Gao Feng's avatar
      ppp: Fix a scheduling-while-atomic bug in del_chan · ddab8282
      Gao Feng authored
      The PPTP set the pptp_sock_destruct as the sock's sk_destruct, it would
      trigger this bug when __sk_free is invoked in atomic context, because of
      the call path pptp_sock_destruct->del_chan->synchronize_rcu.
      
      Now move the synchronize_rcu to pptp_release from del_chan. This is the
      only one case which would free the sock and need the synchronize_rcu.
      
      The following is the panic I met with kernel 3.3.8, but this issue should
      exist in current kernel too according to the codes.
      
      BUG: scheduling while atomic
      __schedule_bug+0x5e/0x64
      __schedule+0x55/0x580
      ? ppp_unregister_channel+0x1cd5/0x1de0 [ppp_generic]
      ? dev_hard_start_xmit+0x423/0x530
      ? sch_direct_xmit+0x73/0x170
      __cond_resched+0x16/0x30
      _cond_resched+0x22/0x30
      wait_for_common+0x18/0x110
      ? call_rcu_bh+0x10/0x10
      wait_for_completion+0x12/0x20
      wait_rcu_gp+0x34/0x40
      ? wait_rcu_gp+0x40/0x40
      synchronize_sched+0x1e/0x20
      0xf8417298
      0xf8417484
      ? sock_queue_rcv_skb+0x109/0x130
      __sk_free+0x16/0x110
      ? udp_queue_rcv_skb+0x1f2/0x290
      sk_free+0x16/0x20
      __udp4_lib_rcv+0x3b8/0x650
      Signed-off-by: default avatarGao Feng <gfree.wind@vip.163.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ddab8282
    • Florian Fainelli's avatar
      Revert "net: bcmgenet: Remove init parameter from bcmgenet_mii_config" · 00d51094
      Florian Fainelli authored
      This reverts commit 28b45910 ("net: bcmgenet: Remove init parameter
      from bcmgenet_mii_config") because in the process of moving from
      dev_info() to dev_info_once() we essentially lost the helpful printed
      messages once the second instance of the driver is loaded.
      dev_info_once() does not actually print the message once per device
      instance, but once period.
      
      Fixes: 28b45910 ("net: bcmgenet: Remove init parameter from bcmgenet_mii_config")
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Reviewed-by: default avatarDoug Berger <opendmb@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      00d51094
    • Michael S. Tsirkin's avatar
      virtio_net: fix truesize for mergeable buffers · 1daa8790
      Michael S. Tsirkin authored
      Seth Forshee noticed a performance degradation with some workloads.
      This turns out to be due to packet drops.  Euan Kemp noticed that this
      is because we drop all packets where length exceeds the truesize, but
      for some packets we add in extra memory without updating the truesize.
      This in turn was kept around unchanged from ab7db917 ("virtio-net:
      auto-tune mergeable rx buffer size for improved performance").  That
      commit had an internal reason not to account for the extra space: not
      enough bits to do it.  No longer true so let's account for the allocated
      length exactly.
      
      Many thanks to Seth Forshee for the report and bisecting and Euan Kemp
      for debugging the issue.
      
      Fixes: 680557cf ("virtio_net: rework mergeable buffer handling")
      Reported-by: default avatarEuan Kemp <euan.kemp@coreos.com>
      Tested-by: default avatarEuan Kemp <euan.kemp@coreos.com>
      Reported-by: default avatarSeth Forshee <seth.forshee@canonical.com>
      Tested-by: default avatarSeth Forshee <seth.forshee@canonical.com>
      Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1daa8790
    • Sergei Shtylyov's avatar
      mv643xx_eth: fix of_irq_to_resource() error check · cfbcb61f
      Sergei Shtylyov authored
      of_irq_to_resource() has recently been  fixed to return negative error #'s
      along with 0 in case of failure,  however the Marvell MV643xx Ethernet
      driver still only regards 0  as invalid IRQ -- fix it up.
      
      Fixes: 7a4228bb ("of: irq: use of_irq_get() in of_irq_to_resource()")
      Signed-off-by: default avatarSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      cfbcb61f
    • Florian Fainelli's avatar
      MAINTAINERS: Add more files to the PHY LIBRARY section · 13332db5
      Florian Fainelli authored
      Include missing files that are provided by, used, or directly maintained
      within the PHY LIBRARY, this include uapi header, header files used by
      Device Tree code etc.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      13332db5
    • Ido Schimmel's avatar
      ipv4: fib: Fix NULL pointer deref during fib_sync_down_dev() · 71ed7ee3
      Ido Schimmel authored
      Michał reported a NULL pointer deref during fib_sync_down_dev() when
      unregistering a netdevice. The problem is that we don't check for
      'in_dev' being NULL, which can happen in very specific cases.
      
      Usually routes are flushed upon NETDEV_DOWN sent in either the netdev or
      the inetaddr notification chains. However, if an interface isn't
      configured with any IP address, then it's possible for host routes to be
      flushed following NETDEV_UNREGISTER, after NULLing dev->ip_ptr in
      inetdev_destroy().
      
      To reproduce:
      $ ip link add type dummy
      $ ip route add local 1.1.1.0/24 dev dummy0
      $ ip link del dev dummy0
      
      Fix this by checking for the presence of 'in_dev' before referencing it.
      
      Fixes: 982acb97 ("ipv4: fib: Notify about nexthop status changes")
      Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
      Reported-by: default avatarMichał Mirosław <mirq-linux@rere.qmqm.pl>
      Tested-by: default avatarMichał Mirosław <mirq-linux@rere.qmqm.pl>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      71ed7ee3
    • Florian Fainelli's avatar
      net: phy: Correctly process PHY_HALTED in phy_stop_machine() · 7ad813f2
      Florian Fainelli authored
      Marc reported that he was not getting the PHY library adjust_link()
      callback function to run when calling phy_stop() + phy_disconnect()
      which does not indeed happen because we set the state machine to
      PHY_HALTED but we don't get to run it to process this state past that
      point.
      
      Fix this with a synchronous call to phy_state_machine() in order to have
      the state machine actually act on PHY_HALTED, set the PHY device's link
      down, turn the network device's carrier off and finally call the
      adjust_link() function.
      Reported-by: default avatarMarc Gonzalez <marc_gonzalez@sigmadesigns.com>
      Fixes: a390d1f3 ("phylib: convert state_queue work to delayed_work")
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarMarc Gonzalez <marc_gonzalez@sigmadesigns.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7ad813f2
  2. 31 Jul, 2017 5 commits
    • Mark Cave-Ayland's avatar
      sunhme: fix up GREG_STAT and GREG_IMASK register offsets · 96a734ba
      Mark Cave-Ayland authored
      Update the values to match those from the STP2002QFP documentation.
      Signed-off-by: default avatarMark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      96a734ba
    • Linus Torvalds's avatar
      Merge branch 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup · 2e7ca206
      Linus Torvalds authored
      Pull cgroup fixes from Tejun Heo:
       "Several cgroup bug fixes.
      
         - cgroup core was calling a migration callback on empty migrations,
           which could make cpuset crash.
      
         - There was a very subtle bug where the controller interface files
           aren't created directly when cgroup2 is mounted. Because later
           operations create them, this bug didn't get noticed earlier.
      
         - Failed writes to cgroup.subtree_control were incorrectly returning
           zero"
      
      * 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
        cgroup: fix error return value from cgroup_subtree_control()
        cgroup: create dfl_root files on subsys registration
        cgroup: don't call migration methods if there are no tasks to migrate
      2e7ca206
    • Linus Torvalds's avatar
      Merge branch 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq · ff2620f7
      Linus Torvalds authored
      Pull workqueue fixes from Tejun Heo:
       "Two notable fixes.
      
         - While adding NUMA affinity support to unbound workqueues, the
           assumption that an unbound workqueue with max_active == 1 is
           ordered was broken.
      
           The plan was to use explicit alloc_ordered_workqueue() for those
           cases. Unfortunately, I forgot to update the documentation properly
           and we grew a handful of use cases which depend on that assumption.
      
           While we want to convert them to alloc_ordered_workqueue(), we
           don't really lose anything by enforcing ordered execution on
           unbound max_active == 1 workqueues and it doesn't make sense to
           risk subtle bugs. Restore the assumption.
      
         - Workqueue assumes that CPU <-> NUMA node mapping remains static.
      
           This is a general assumption - we don't have any synchronization
           mechanism around CPU <-> node mapping. Unfortunately, powerpc may
           change the mapping dynamically leading to crashes. Michael added a
           workaround so that we at least don't crash while powerpc hotplug
           code gets updated"
      
      * 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
        workqueue: Work around edge cases for calc of pool's cpumask
        workqueue: implicit ordered attribute should be overridable
        workqueue: restore WQ_UNBOUND/max_active==1 to be ordered
      ff2620f7
    • Linus Torvalds's avatar
      Merge branch 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata · 3dcc4c7d
      Linus Torvalds authored
      Pull libata fixes from Tejun Heo:
       "Dan found a really old bug where libata hotplug code wasn't sanitizing
        index value from userland and may end up indexing with a negative
        number. It is scary but fortunately can only be triggered by root.
      
        Other than that, minor fixes"
      
      * 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
        libata: fix a couple of doc build warnings
        libata: array underflow in ata_find_dev()
        ata: sata_rcar: add gen[23] fallback compatibility strings
        libata: remove unused rc in ata_eh_handle_port_resume
        libata: Cleanup ata_read_log_page()
        ata: fix gemini Kconfig dependencies
      3dcc4c7d
    • Jonathan Corbet's avatar
      libata: fix a couple of doc build warnings · 2f60e1ab
      Jonathan Corbet authored
      The kerneldoc comments for a couple of functions in drivers/ata/libata-eh.c
      had fallen behind the current implementation, resulting in these doc build
      warnings:
      
        ./drivers/ata/libata-eh.c:1449: warning: No description found for parameter 'link'
        ./drivers/ata/libata-eh.c:1449: warning: Excess function parameter 'ap' description in 'ata_eh_done'
        ./drivers/ata/libata-eh.c:1590: warning: No description found for parameter 'qc'
        ./drivers/ata/libata-eh.c:1590: warning: Excess function parameter 'dev' description in 'ata_eh_request_sense'
      
      Update the comments and make the warnings go away.
      Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      2f60e1ab
  3. 30 Jul, 2017 7 commits
  4. 29 Jul, 2017 10 commits
  5. 28 Jul, 2017 7 commits
    • Linus Torvalds's avatar
      Merge tag 'nfs-for-4.13-3' of git://git.linux-nfs.org/projects/anna/linux-nfs · 286ba844
      Linus Torvalds authored
      Pull NFS client fixes from Anna Schumaker:
       "More NFS client bugfixes for 4.13.
      
        Most of these fix locking bugs that Ben and Neil noticed, but I also
        have a patch to fix one more access bug that was reported after last
        week.
      
        Stable fixes:
         - Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
         - Invalidate file size when taking a lock to prevent corruption
      
        Other fixes:
         - Don't excessively generate tiny writes with fallocate
         - Use the raw NFS access mask in nfs4_opendata_access()"
      
      * tag 'nfs-for-4.13-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
        NFSv4.1: Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
        NFS: Optimize fallocate by refreshing mapping when needed.
        NFS: invalidate file size when taking a lock.
        NFS: Use raw NFS access mask in nfs4_opendata_access()
      286ba844
    • Linus Torvalds's avatar
      Merge tag 'xfs-4.13-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux · 19993e73
      Linus Torvalds authored
      Pull xfs fixes from Darrick Wong:
      
       - fix firstfsb variables that we left uninitialized, which could lead
         to locking problems.
      
       - check for NULL metadata buffer pointers before using them.
      
       - don't allow btree cursor manipulation if the btree block is corrupt.
         Better to just shut down.
      
       - fix infinite loop problems in quotacheck.
      
       - fix buffer overrun when validating directory blocks.
      
       - fix deadlock problem in bunmapi.
      
      * tag 'xfs-4.13-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
        xfs: fix multi-AG deadlock in xfs_bunmapi
        xfs: check that dir block entries don't off the end of the buffer
        xfs: fix quotacheck dquot id overflow infinite loop
        xfs: check _alloc_read_agf buffer pointer before using
        xfs: set firstfsb to NULLFSBLOCK before feeding it to _bmapi_write
        xfs: check _btree_check_block value
      19993e73
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 81554693
      Linus Torvalds authored
      Pull KVM fixes from Paolo Bonzini:
       "s390:
         - SRCU fix
      
        PPC:
         - host crash fixes
      
        x86:
         - bugfixes, including making nested posted interrupts really work
      
        Generic:
         - tweaks to kvm_stat and to uevents"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        KVM: LAPIC: Fix reentrancy issues with preempt notifiers
        tools/kvm_stat: add '-f help' to get the available event list
        tools/kvm_stat: use variables instead of hard paths in help output
        KVM: nVMX: Fix loss of L2's NMI blocking state
        KVM: nVMX: Fix posted intr delivery when vcpu is in guest mode
        x86: irq: Define a global vector for nested posted interrupts
        KVM: x86: do mask out upper bits of PAE CR3
        KVM: make pid available for uevents without debugfs
        KVM: s390: take srcu lock when getting/setting storage keys
        KVM: VMX: remove unused field
        KVM: PPC: Book3S HV: Fix host crash on changing HPT size
        KVM: PPC: Book3S HV: Enable TM before accessing TM registers
      81554693
    • Linus Torvalds's avatar
      Merge tag 'for-linus-4.13b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip · 8562e89e
      Linus Torvalds authored
      Pull xen fixes from Juergen Gross:
       "Three minor cleanups for xen related drivers"
      
      * tag 'for-linus-4.13b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
        xen: dont fiddle with event channel masking in suspend/resume
        xen: selfballoon: remove unnecessary static in frontswap_selfshrink()
        xen: Drop un-informative message during boot
      8562e89e
    • Linus Torvalds's avatar
      Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 3d9d7405
      Linus Torvalds authored
      Pull arm64 fixes from Will Deacon:
       "I'd been collecting these whilst we debugged a CPU hotplug failure,
        but we ended up diagnosing that one to tglx, who has taken a fix via
        the -tip tree separately.
      
        We're seeing some NFS issues that we haven't gotten to the bottom of
        yet, and we've uncovered some issues with our backtracing too so there
        might be another fixes pull before we're done.
      
        Summary:
      
         - Ensure we have a guard page after the kernel image in vmalloc
      
         - Fix incorrect prefetch stride in copy_page
      
         - Ensure irqs are disabled in die()
      
         - Fix for event group validation in QCOM L2 PMU driver
      
         - Fix requesting of PMU IRQs on AMD Seattle
      
         - Minor cleanups and fixes"
      
      * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
        arm64: mmu: Place guard page after mapping of kernel image
        drivers/perf: arm_pmu: Request PMU SPIs with IRQF_PER_CPU
        arm64: sysreg: Fix unprotected macro argmuent in write_sysreg
        perf: qcom_l2: fix column exclusion check
        arm64/lib: copy_page: use consistent prefetch stride
        arm64/numa: Drop duplicate message
        perf: Convert to using %pOF instead of full_name
        arm64: Convert to using %pOF instead of full_name
        arm64: traps: disable irq in die()
        arm64: atomics: Remove '&' from '+&' asm constraint in lse atomics
        arm64: uaccess: Remove redundant __force from addr cast in __range_ok
      3d9d7405
    • Linus Torvalds's avatar
      Merge tag 'powerpc-4.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · 080012ba
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
       "The highlight is Ben's patch to work around a host killing bug when
        running KVM guests with the Radix MMU on Power9. See the long change
        log of that commit for more detail.
      
        And then three fairly minor fixes:
      
         - fix of_node_put() underflow during reconfig remove, using old DLPAR
           tools.
      
         - fix recently introduced ld version check with 64-bit LE-only
           toolchain.
      
         - free the subpage_prot_table correctly, avoiding a memory leak.
      
        Thanks to: Aneesh Kumar K.V, Benjamin Herrenschmidt, Laurent Vivier"
      
      * tag 'powerpc-4.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/mm/hash: Free the subpage_prot_table correctly
        powerpc/Makefile: Fix ld version check with 64-bit LE-only toolchain
        powerpc/pseries: Fix of_node_put() underflow during reconfig remove
        powerpc/mm/radix: Workaround prefetch issue with KVM
      080012ba
    • Benjamin Coddington's avatar
      NFSv4.1: Fix a race where CB_NOTIFY_LOCK fails to wake a waiter · b7dbcc0e
      Benjamin Coddington authored
      nfs4_retry_setlk() sets the task's state to TASK_INTERRUPTIBLE within the
      same region protected by the wait_queue's lock after checking for a
      notification from CB_NOTIFY_LOCK callback.  However, after releasing that
      lock, a wakeup for that task may race in before the call to
      freezable_schedule_timeout_interruptible() and set TASK_WAKING, then
      freezable_schedule_timeout_interruptible() will set the state back to
      TASK_INTERRUPTIBLE before the task will sleep.  The result is that the task
      will sleep for the entire duration of the timeout.
      
      Since we've already set TASK_INTERRUPTIBLE in the locked section, just use
      freezable_schedule_timout() instead.
      
      Fixes: a1d617d8 ("nfs: allow blocking locks to be awoken by lock callbacks")
      Signed-off-by: default avatarBenjamin Coddington <bcodding@redhat.com>
      Reviewed-by: default avatarJeff Layton <jlayton@redhat.com>
      Cc: stable@vger.kernel.org # v4.9+
      Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
      b7dbcc0e