1. 09 Aug, 2018 1 commit
    • Eric W. Biederman's avatar
      signal: Don't restart fork when signals come in. · c3ad2c3b
      Eric W. Biederman authored
      Wen Yang <wen.yang99@zte.com.cn> and majiang <ma.jiang@zte.com.cn>
      report that a periodic signal received during fork can cause fork to
      continually restart preventing an application from making progress.
      
      The code was being overly pessimistic.  Fork needs to guarantee that a
      signal sent to multiple processes is logically delivered before the
      fork and just to the forking process or logically delivered after the
      fork to both the forking process and it's newly spawned child.  For
      signals like periodic timers that are always delivered to a single
      process fork can safely complete and let them appear to logically
      delivered after the fork().
      
      While examining this issue I also discovered that fork today will miss
      signals delivered to multiple processes during the fork and handled by
      another thread.  Similarly the current code will also miss blocked
      signals that are delivered to multiple process, as those signals will
      not appear pending during fork.
      
      Add a list of each thread that is currently forking, and keep on that
      list a signal set that records all of the signals sent to multiple
      processes.  When fork completes initialize the new processes
      shared_pending signal set with it.  The calculate_sigpending function
      will see those signals and set TIF_SIGPENDING causing the new task to
      take the slow path to userspace to handle those signals.  Making it
      appear as if those signals were received immediately after the fork.
      
      It is not possible to send real time signals to multiple processes and
      exceptions don't go to multiple processes, which means that that are
      no signals sent to multiple processes that require siginfo.  This
      means it is safe to not bother collecting siginfo on signals sent
      during fork.
      
      The sigaction of a child of fork is initially the same as the
      sigaction of the parent process.  So a signal the parent ignores the
      child will also initially ignore.  Therefore it is safe to ignore
      signals sent to multiple processes and ignored by the forking process.
      
      Signals sent to only a single process or only a single thread and delivered
      during fork are treated as if they are received after the fork, and generally
      not dealt with.  They won't cause any problems.
      
      V2: Added removal from the multiprocess list on failure.
      V3: Use -ERESTARTNOINTR directly
      V4: - Don't queue both SIGCONT and SIGSTOP
          - Initialize signal_struct.multiprocess in init_task
          - Move setting of shared_pending to before the new task
            is visible to signals.  This prevents signals from comming
            in before shared_pending.signal is set to delayed.signal
            and being lost.
      V5: - rework list add and delete to account for idle threads
      v6: - Use sigdelsetmask when removing stop signals
      
      Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=200447
      Reported-by: Wen Yang <wen.yang99@zte.com.cn> and
      Reported-by: default avatarmajiang <ma.jiang@zte.com.cn>
      Fixes: 4a2c7a78 ("[PATCH] make fork() atomic wrt pgrp/session signals")
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      c3ad2c3b
  2. 04 Aug, 2018 3 commits
    • Eric W. Biederman's avatar
      fork: Have new threads join on-going signal group stops · 924de3b8
      Eric W. Biederman authored
      There are only two signals that are delivered to every member of a
      signal group: SIGSTOP and SIGKILL.  Signal delivery requires every
      signal appear to be delivered either before or after a clone syscall.
      SIGKILL terminates the clone so does not need to be considered.  Which
      leaves only SIGSTOP that needs to be considered when creating new
      threads.
      
      Today in the event of a group stop TIF_SIGPENDING will get set and the
      fork will restart ensuring the fork syscall participates in the group
      stop.
      
      A fork (especially of a process with a lot of memory) is one of the
      most expensive system so we really only want to restart a fork when
      necessary.
      
      It is easy so check to see if a SIGSTOP is ongoing and have the new
      thread join it immediate after the clone completes.  Making it appear
      the clone completed happened just before the SIGSTOP.
      
      The calculate_sigpending function will see the bits set in jobctl and
      set TIF_SIGPENDING to ensure the new task takes the slow path to userspace.
      
      V2: The call to task_join_group_stop was moved before the new task is
          added to the thread group list.  This should not matter as
          sighand->siglock is held over both the addition of the threads,
          the call to task_join_group_stop and do_signal_stop.  But the change
          is trivial and it is one less thing to worry about when reading
          the code.
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      924de3b8
    • Eric W. Biederman's avatar
      fork: Skip setting TIF_SIGPENDING in ptrace_init_task · 4390e9ea
      Eric W. Biederman authored
      The code in calculate_sigpending will now handle this so
      it is just redundant and possibly a little confusing
      to continue setting TIF_SIGPENDING in ptrace_init_task.
      Suggested-by: default avatarOleg Nesterov <oleg@redhat.com>
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      4390e9ea
    • Eric W. Biederman's avatar
      signal: Add calculate_sigpending() · 088fe47c
      Eric W. Biederman authored
      Add a function calculate_sigpending to test to see if any signals are
      pending for a new task immediately following fork.  Signals have to
      happen either before or after fork.  Today our practice is to push
      all of the signals to before the fork, but that has the downside that
      frequent or periodic signals can make fork take much much longer than
      normal or prevent fork from completing entirely.
      
      So we need move signals that we can after the fork to prevent that.
      
      This updates the code to set TIF_SIGPENDING on a new task if there
      are signals or other activities that have moved so that they appear
      to happen after the fork.
      
      As the code today restarts if it sees any such activity this won't
      immediately have an effect, as there will be no reason for it
      to set TIF_SIGPENDING immediately after the fork.
      
      Adding calculate_sigpending means the code in fork can safely be
      changed to not always restart if a signal is pending.
      
      The new calculate_sigpending function sets sigpending if there
      are pending bits in jobctl, pending signals, the freezer needs
      to freeze the new task or the live kernel patching framework
      need the new thread to take the slow path to userspace.
      
      I have verified that setting TIF_SIGPENDING does make a new process
      take the slow path to userspace before it executes it's first userspace
      instruction.
      
      I have looked at the callers of signal_wake_up and the code paths
      setting TIF_SIGPENDING and I don't see anything else that needs to be
      handled.  The code probably doesn't need to set TIF_SIGPENDING for the
      kernel live patching as it uses a separate thread flag as well.  But
      at this point it seems safer reuse the recalc_sigpending logic and get
      the kernel live patching folks to sort out their story later.
      
      V2: I have moved the test into schedule_tail where siglock can
          be grabbed and recalc_sigpending can be reused directly.
          Further as the last action of setting up a new task this
          guarantees that TIF_SIGPENDING will be properly set in the
          new process.
      
          The helper calculate_sigpending takes the siglock and
          uncontitionally sets TIF_SIGPENDING and let's recalc_sigpending
          clear TIF_SIGPENDING if it is unnecessary.  This allows reusing
          the existing code and keeps maintenance of the conditions simple.
      
          Oleg Nesterov <oleg@redhat.com>  suggested the movement
          and pointed out the need to take siglock if this code
          was going to be called while the new task is discoverable.
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      088fe47c
  3. 23 Jul, 2018 2 commits
    • Eric W. Biederman's avatar
      fork: Unconditionally exit if a fatal signal is pending · 7673bf55
      Eric W. Biederman authored
      In practice this does not change anything as testing for fatal_signal_pending
      and exiting for with an error code duplicates the work of the next clause
      which recalculates pending signals and then exits fork if any are pending.
      In both cases the pending signal will trigger the slow path when existing
      to userspace, and the fatal signal will cause do_exit to be called.
      
      The advantage of making this a separate test is that it makes it clear
      processing the fatal signal will terminate the fork, and it allows the
      rest of the signal logic to be updated without fear that this important
      case will be lost.
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      7673bf55
    • Eric W. Biederman's avatar
      fork: Move and describe why the code examines PIDNS_ADDING · 4ca1d3ee
      Eric W. Biederman authored
      Normally this would be something that would be handled by handling
      signals that are sent to a group of processes but in this case the
      forking process is not a member of the group being signaled.  Thus
      special code is needed to prevent a race with pid namespaces exiting,
      and fork adding new processes within them.
      
      Move this test up before the signal restart just in case signals are
      also pending.  Fatal conditions should take presedence over restarts.
      Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      4ca1d3ee
  4. 21 Jul, 2018 15 commits
  5. 16 Jun, 2018 8 commits
    • Linus Torvalds's avatar
      Linux 4.18-rc1 · ce397d21
      Linus Torvalds authored
      ce397d21
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20180616' of git://git.kernel.dk/linux-block · 265c5596
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "A collection of fixes that should go into -rc1. This contains:
      
         - bsg_open vs bsg_unregister race fix (Anatoliy)
      
         - NVMe pull request from Christoph, with fixes for regressions in
           this window, FC connect/reconnect path code unification, and a
           trace point addition.
      
         - timeout fix (Christoph)
      
         - remove a few unused functions (Christoph)
      
         - blk-mq tag_set reinit fix (Roman)"
      
      * tag 'for-linus-20180616' of git://git.kernel.dk/linux-block:
        bsg: fix race of bsg_open and bsg_unregister
        block: remov blk_queue_invalidate_tags
        nvme-fabrics: fix and refine state checks in __nvmf_check_ready
        nvme-fabrics: handle the admin-only case properly in nvmf_check_ready
        nvme-fabrics: refactor queue ready check
        blk-mq: remove blk_mq_tagset_iter
        nvme: remove nvme_reinit_tagset
        nvme-fc: fix nulling of queue data on reconnect
        nvme-fc: remove reinit_request routine
        blk-mq: don't time out requests again that are in the timeout handler
        nvme-fc: change controllers first connect to use reconnect path
        nvme: don't rely on the changed namespace list log
        nvmet: free smart-log buffer after use
        nvme-rdma: fix error flow during mapping request data
        nvme: add bio remapping tracepoint
        nvme: fix NULL pointer dereference in nvme_init_subsystem
        blk-mq: reinit q->tag_set_list entry only after grace period
      265c5596
    • Linus Torvalds's avatar
      Merge tag 'docs-broken-links' of git://linuxtv.org/mchehab/experimental · 5e7b9212
      Linus Torvalds authored
      Pull documentation fixes from Mauro Carvalho Chehab:
       "This solves a series of broken links for files under Documentation,
        and improves a script meant to detect such broken links (see
        scripts/documentation-file-ref-check).
      
        The changes on this series are:
      
         - can.rst: fix a footnote reference;
      
         - crypto_engine.rst: Fix two parsing warnings;
      
         - Fix a lot of broken references to Documentation/*;
      
         - improve the scripts/documentation-file-ref-check script, in order
           to help detecting/fixing broken references, preventing
           false-positives.
      
        After this patch series, only 33 broken references to doc files are
        detected by scripts/documentation-file-ref-check"
      
      * tag 'docs-broken-links' of git://linuxtv.org/mchehab/experimental: (26 commits)
        fix a series of Documentation/ broken file name references
        Documentation: rstFlatTable.py: fix a broken reference
        ABI: sysfs-devices-system-cpu: remove a broken reference
        devicetree: fix a series of wrong file references
        devicetree: fix name of pinctrl-bindings.txt
        devicetree: fix some bindings file names
        MAINTAINERS: fix location of DT npcm files
        MAINTAINERS: fix location of some display DT bindings
        kernel-parameters.txt: fix pointers to sound parameters
        bindings: nvmem/zii: Fix location of nvmem.txt
        docs: Fix more broken references
        scripts/documentation-file-ref-check: check tools/*/Documentation
        scripts/documentation-file-ref-check: get rid of false-positives
        scripts/documentation-file-ref-check: hint: dash or underline
        scripts/documentation-file-ref-check: add a fix logic for DT
        scripts/documentation-file-ref-check: accept more wildcards at filenames
        scripts/documentation-file-ref-check: fix help message
        media: max2175: fix location of driver's companion documentation
        media: v4l: fix broken video4linux docs locations
        media: dvb: point to the location of the old README.dvb-usb file
        ...
      5e7b9212
    • Linus Torvalds's avatar
      Merge tag 'fsnotify_for_v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs · dbb2816f
      Linus Torvalds authored
      Pull fsnotify updates from Jan Kara:
       "fsnotify cleanups unifying handling of different watch types.
      
        This is the shortened fsnotify series from Amir with the last five
        patches pulled out. Amir has modified those patches to not change
        struct inode but obviously it's too late for those to go into this
        merge window"
      
      * tag 'fsnotify_for_v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
        fsnotify: add fsnotify_add_inode_mark() wrappers
        fanotify: generalize fanotify_should_send_event()
        fsnotify: generalize send_to_group()
        fsnotify: generalize iteration of marks by object type
        fsnotify: introduce marks iteration helpers
        fsnotify: remove redundant arguments to handle_event()
        fsnotify: use type id to identify connector object type
      dbb2816f
    • Linus Torvalds's avatar
      Merge tag 'fbdev-v4.18' of git://github.com/bzolnier/linux · 644f2639
      Linus Torvalds authored
      Pull fbdev updates from Bartlomiej Zolnierkiewicz:
       "There is nothing really major here, few small fixes, some cleanups and
        dead drivers removal:
      
         - mark omapfb drivers as orphans in MAINTAINERS file (Tomi Valkeinen)
      
         - add missing module license tags to omap/omapfb driver (Arnd
           Bergmann)
      
         - add missing GPIOLIB dependendy to omap2/omapfb driver (Arnd
           Bergmann)
      
         - convert savagefb, aty128fb & radeonfb drivers to use msleep & co.
           (Jia-Ju Bai)
      
         - allow COMPILE_TEST build for viafb driver (media part was reviewed
           by media subsystem Maintainer)
      
         - remove unused MERAM support from sh_mobile_lcdcfb and shmob-drm
           drivers (drm parts were acked by shmob-drm driver Maintainer)
      
         - remove unused auo_k190xfb drivers
      
         - misc cleanups (Souptick Joarder, Wolfram Sang, Markus Elfring, Andy
           Shevchenko, Colin Ian King)"
      
      * tag 'fbdev-v4.18' of git://github.com/bzolnier/linux: (26 commits)
        fb_omap2: add gpiolib dependency
        video/omap: add module license tags
        MAINTAINERS: make omapfb orphan
        video: fbdev: pxafb: match_string() conversion fixup
        video: fbdev: nvidia: fix spelling mistake: "scaleing" -> "scaling"
        video: fbdev: fix spelling mistake: "frambuffer" -> "framebuffer"
        video: fbdev: pxafb: Convert to use match_string() helper
        video: fbdev: via: allow COMPILE_TEST build
        video: fbdev: remove unused sh_mobile_meram driver
        drm: shmobile: remove unused MERAM support
        video: fbdev: sh_mobile_lcdcfb: remove unused MERAM support
        video: fbdev: remove unused auo_k190xfb drivers
        video: omap: Improve a size determination in omapfb_do_probe()
        video: sm501fb: Improve a size determination in sm501fb_probe()
        video: fbdev-MMP: Improve a size determination in path_init()
        video: fbdev-MMP: Delete an error message for a failed memory allocation in two functions
        video: auo_k190x: Delete an error message for a failed memory allocation in auok190x_common_probe()
        video: sh_mobile_lcdcfb: Delete an error message for a failed memory allocation in two functions
        video: sh_mobile_meram: Delete an error message for a failed memory allocation in sh_mobile_meram_probe()
        video: fbdev: sh_mobile_meram: Drop SUPERH platform dependency
        ...
      644f2639
    • Linus Torvalds's avatar
      Merge branch 'afs-proc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 35773c93
      Linus Torvalds authored
      Pull AFS updates from Al Viro:
       "Assorted AFS stuff - ended up in vfs.git since most of that consists
        of David's AFS-related followups to Christoph's procfs series"
      
      * 'afs-proc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        afs: Optimise callback breaking by not repeating volume lookup
        afs: Display manually added cells in dynamic root mount
        afs: Enable IPv6 DNS lookups
        afs: Show all of a server's addresses in /proc/fs/afs/servers
        afs: Handle CONFIG_PROC_FS=n
        proc: Make inline name size calculation automatic
        afs: Implement network namespacing
        afs: Mark afs_net::ws_cell as __rcu and set using rcu functions
        afs: Fix a Sparse warning in xdr_decode_AFSFetchStatus()
        proc: Add a way to make network proc files writable
        afs: Rearrange fs/afs/proc.c to remove remaining predeclarations.
        afs: Rearrange fs/afs/proc.c to move the show routines up
        afs: Rearrange fs/afs/proc.c by moving fops and open functions down
        afs: Move /proc management functions to the end of the file
      35773c93
    • Linus Torvalds's avatar
      Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 29d6849d
      Linus Torvalds authored
      Pull compat updates from Al Viro:
       "Some biarch patches - getting rid of assorted (mis)uses of
        compat_alloc_user_space().
      
        Not much in that area this cycle..."
      
      * 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        orangefs: simplify compat ioctl handling
        signalfd: lift sigmask copyin and size checks to callers of do_signalfd4()
        vmsplice(): lift importing iovec into vmsplice(2) and compat counterpart
      29d6849d
    • Linus Torvalds's avatar
      Merge branch 'work.aio' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · a5b729ea
      Linus Torvalds authored
      Pull aio fixes from Al Viro:
       "Assorted AIO followups and fixes"
      
      * 'work.aio' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        eventpoll: switch to ->poll_mask
        aio: only return events requested in poll_mask() for IOCB_CMD_POLL
        eventfd: only return events requested in poll_mask()
        aio: mark __aio_sigset::sigmask const
      a5b729ea
  6. 15 Jun, 2018 11 commits
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 9215310c
      Linus Torvalds authored
      Pull networking fixes from David Miller:
      
       1) Various netfilter fixlets from Pablo and the netfilter team.
      
       2) Fix regression in IPVS caused by lack of PMTU exceptions on local
          routes in ipv6, from Julian Anastasov.
      
       3) Check pskb_trim_rcsum for failure in DSA, from Zhouyang Jia.
      
       4) Don't crash on poll in TLS, from Daniel Borkmann.
      
       5) Revert SO_REUSE{ADDR,PORT} change, it regresses various things
          including Avahi mDNS. From Bart Van Assche.
      
       6) Missing of_node_put in qcom/emac driver, from Yue Haibing.
      
       7) We lack checking of the TCP checking in one special case during SYN
          receive, from Frank van der Linden.
      
       8) Fix module init error paths of mac80211 hwsim, from Johannes Berg.
      
       9) Handle 802.1ad properly in stmmac driver, from Elad Nachman.
      
      10) Must grab HW caps before doing quirk checks in stmmac driver, from
          Jose Abreu.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (81 commits)
        net: stmmac: Run HWIF Quirks after getting HW caps
        neighbour: skip NTF_EXT_LEARNED entries during forced gc
        net: cxgb3: add error handling for sysfs_create_group
        tls: fix waitall behavior in tls_sw_recvmsg
        tls: fix use-after-free in tls_push_record
        l2tp: filter out non-PPP sessions in pppol2tp_tunnel_ioctl()
        l2tp: reject creation of non-PPP sessions on L2TPv2 tunnels
        mlxsw: spectrum_switchdev: Fix port_vlan refcounting
        mlxsw: spectrum_router: Align with new route replace logic
        mlxsw: spectrum_router: Allow appending to dev-only routes
        ipv6: Only emit append events for appended routes
        stmmac: added support for 802.1ad vlan stripping
        cfg80211: fix rcu in cfg80211_unregister_wdev
        mac80211: Move up init of TXQs
        mac80211_hwsim: fix module init error paths
        cfg80211: initialize sinfo in cfg80211_get_station
        nl80211: fix some kernel doc tag mistakes
        hv_netvsc: Fix the variable sizes in ipsecv2 and rsc offload
        rds: avoid unenecessary cong_update in loop transport
        l2tp: clean up stale tunnel or session in pppol2tp_connect's error path
        ...
      9215310c
    • Linus Torvalds's avatar
      Merge tag 'modules-for-v4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux · de7f01c2
      Linus Torvalds authored
      Pull module updates from Jessica Yu:
       "Minor code cleanup and also allow sig_enforce param to be shown in
        sysfs with CONFIG_MODULE_SIG_FORCE"
      
      * tag 'modules-for-v4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
        module: Allow to always show the status of modsign
        module: Do not access sig_enforce directly
      de7f01c2
    • Linus Torvalds's avatar
      Merge branch 'for-linus-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml · 8d1e5133
      Linus Torvalds authored
      Pull uml updates from Richard Weinberger:
       "Minor updates for UML:
      
         - fixes for our new vector network driver by Anton
      
         - initcall cleanup by Alexander
      
         - We have a new mailinglist, sourceforge.net sucks"
      
      * 'for-linus-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
        um: Fix raw interface options
        um: Fix initialization of vector queues
        um: remove uml initcalls
        um: Update mailing list address
      8d1e5133
    • Linus Torvalds's avatar
      Merge tag 'riscv-for-linus-4.18-merge_window' of... · 6a4d4b32
      Linus Torvalds authored
      Merge tag 'riscv-for-linus-4.18-merge_window' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux
      
      Pull RISC-V updates from Palmer Dabbelt:
       "This contains some small RISC-V updates I'd like to target for 4.18.
      
        They are all fairly small this time. Here's a short summary, there's
        more info in the commits/merges:
      
         - a fix to __clear_user to respect the passed arguments.
      
         - enough support for the perf subsystem to work with RISC-V's ISA
           defined performance counters.
      
         - support for sparse and cleanups suggested by it.
      
         - support for R_RISCV_32 (a relocation, not the 32-bit ISA).
      
         - some MAINTAINERS cleanups.
      
         - the addition of CONFIG_HVC_RISCV_SBI to our defconfig, as it's
           always present.
      
        I've given these a simple build+boot test"
      
      * tag 'riscv-for-linus-4.18-merge_window' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
        RISC-V: Add CONFIG_HVC_RISCV_SBI=y to defconfig
        RISC-V: Handle R_RISCV_32 in modules
        riscv/ftrace: Export _mcount when DYNAMIC_FTRACE isn't set
        riscv: add riscv-specific predefines to CHECKFLAGS
        riscv: split the declaration of __copy_user
        riscv: no __user for probe_kernel_address()
        riscv: use NULL instead of a plain 0
        perf: riscv: Add Document for Future Porting Guide
        perf: riscv: preliminary RISC-V support
        MAINTAINERS: Update Albert's email, he's back at Berkeley
        MAINTAINERS: Add myself as a maintainer for SiFive's drivers
        riscv: Fix the bug in memory access fixup code
      6a4d4b32
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 8949170c
      Linus Torvalds authored
      Pull more kvm updates from Paolo Bonzini:
       "Mostly the PPC part of the release, but also switching to Arnd's fix
        for the hyperv config issue and a typo fix.
      
        Main PPC changes:
      
         - reimplement the MMIO instruction emulation
      
         - transactional memory support for PR KVM
      
         - improve radix page table handling"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (63 commits)
        KVM: x86: VMX: redo fix for link error without CONFIG_HYPERV
        KVM: x86: fix typo at kvm_arch_hardware_setup comment
        KVM: PPC: Book3S PR: Fix failure status setting in tabort. emulation
        KVM: PPC: Book3S PR: Enable use on POWER9 bare-metal hosts in HPT mode
        KVM: PPC: Book3S PR: Don't let PAPR guest set MSR hypervisor bit
        KVM: PPC: Book3S PR: Fix failure status setting in treclaim. emulation
        KVM: PPC: Book3S PR: Fix MSR setting when delivering interrupts
        KVM: PPC: Book3S PR: Handle additional interrupt types
        KVM: PPC: Book3S PR: Enable kvmppc_get/set_one_reg_pr() for HTM registers
        KVM: PPC: Book3S: Remove load/put vcpu for KVM_GET_REGS/KVM_SET_REGS
        KVM: PPC: Remove load/put vcpu for KVM_GET/SET_ONE_REG ioctl
        KVM: PPC: Move vcpu_load/vcpu_put down to each ioctl case in kvm_arch_vcpu_ioctl
        KVM: PPC: Book3S PR: Enable HTM for PR KVM for KVM_CHECK_EXTENSION ioctl
        KVM: PPC: Book3S PR: Support TAR handling for PR KVM HTM
        KVM: PPC: Book3S PR: Add guard code to prevent returning to guest with PR=0 and Transactional state
        KVM: PPC: Book3S PR: Add emulation for tabort. in privileged state
        KVM: PPC: Book3S PR: Add emulation for trechkpt.
        KVM: PPC: Book3S PR: Add emulation for treclaim.
        KVM: PPC: Book3S PR: Restore NV regs after emulating mfspr from TM SPRs
        KVM: PPC: Book3S PR: Always fail transactions in guest privileged state
        ...
      8949170c
    • Linus Torvalds's avatar
      Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost · 2f3f0566
      Linus Torvalds authored
      Pull virtio updates from Michael Tsirkin:
       "virtio, vhost: features, fixes
      
         - PCI virtual function support for virtio
      
         - DMA barriers for virtio strong barriers
      
         - bugfixes"
      
      * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
        virtio: update the comments for transport features
        virtio_pci: support enabling VFs
        vhost: fix info leak due to uninitialized memory
        virtio_ring: switch to dma_XX barriers for rpmsg
      2f3f0566
    • Mauro Carvalho Chehab's avatar
      fix a series of Documentation/ broken file name references · 44348e8a
      Mauro Carvalho Chehab authored
      As files move around, their previous links break. Fix the
      references for them.
      Acked-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
      Acked-by: default avatarJonathan Corbet <corbet@lwn.net>
      44348e8a
    • Mauro Carvalho Chehab's avatar
      Documentation: rstFlatTable.py: fix a broken reference · 315e6bc5
      Mauro Carvalho Chehab authored
      The old HOWTO was removed a long time ago. The flat table
      version is not metioned elsewhere, so just get rid of the
      text.
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
      Acked-by: default avatarJonathan Corbet <corbet@lwn.net>
      315e6bc5
    • Mauro Carvalho Chehab's avatar
      ABI: sysfs-devices-system-cpu: remove a broken reference · 6ec71b20
      Mauro Carvalho Chehab authored
      This file doesn't exist anymore:
      	Documentation/cpu-freq/user-guide.txt
      
      As the ABI already points to Documentation/cpu-freq, just
      remove the broken link and the associated text.
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
      Acked-by: default avatarJonathan Corbet <corbet@lwn.net>
      6ec71b20
    • Mauro Carvalho Chehab's avatar
      devicetree: fix a series of wrong file references · e5ca4259
      Mauro Carvalho Chehab authored
      As files got renamed, their references broke.
      
      Manually fix a series of broken refs at the DT bindings.
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
      Acked-by: default avatarJonathan Corbet <corbet@lwn.net>
      e5ca4259
    • Mauro Carvalho Chehab's avatar
      devicetree: fix name of pinctrl-bindings.txt · 18ba1f98
      Mauro Carvalho Chehab authored
      Rename:
      	pinctrl-binding.txt -> pinctrl-bindings.txt
      
      In order to match the current name of this file.
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
      Acked-by: default avatarJonathan Corbet <corbet@lwn.net>
      18ba1f98