1. 01 Aug, 2019 8 commits
    • Paul E. McKenney's avatar
      doc: Add rcutree.kthread_prio pointer to stallwarn.txt · 0500873d
      Paul E. McKenney authored
      This commit adds mention of the rcutree.kthread_prio kernel boot parameter
      to the discussion of how high-priority real-time tasks can result in
      RCU CPU stall warnings.  (However, this does not necessarily help when
      the high-priority real-time tasks are using dubious deadlines.)
      Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.ibm.com>
      0500873d
    • Byungchul Park's avatar
      rcu: Change return type of rcu_spawn_one_boost_kthread() · 3545832f
      Byungchul Park authored
      The return value of rcu_spawn_one_boost_kthread() is not used any longer.
      This commit therefore changes its return type from int to void, and
      removes the cast to void from its callers.
      Signed-off-by: default avatarByungchul Park <byungchul.park@lge.com>
      Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.ibm.com>
      3545832f
    • Paul E. McKenney's avatar
      srcu: Avoid srcutorture security-based pointer obfuscation · 7e210a65
      Paul E. McKenney authored
      Because pointer output is now obfuscated, and because what you really
      want to know is whether or not the callback lists are empty, this commit
      replaces the srcu_data structure's head callback pointer printout with
      a single character that is "." is the callback list is empty or "C"
      otherwise.
      
      This is the only remaining user of rcu_segcblist_head(), so this
      commit also removes this function's definition.  It also turns out that
      rcu_segcblist_tail() no longer has any callers, so this commit removes
      that function's definition while in the area.  They were both marked
      "Interim", and their end has come.
      Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.ibm.com>
      7e210a65
    • Paul E. McKenney's avatar
      rcu: Add destroy_work_on_stack() to match INIT_WORK_ONSTACK() · fbad01af
      Paul E. McKenney authored
      The synchronize_rcu_expedited() function has an INIT_WORK_ONSTACK(),
      but lacks the corresponding destroy_work_on_stack().  This commit
      therefore adds destroy_work_on_stack().
      Reported-by: default avatarAndrea Arcangeli <aarcange@redhat.com>
      Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.ibm.com>
      Acked-by: default avatarAndrea Arcangeli <aarcange@redhat.com>
      fbad01af
    • Paul E. McKenney's avatar
      rcu: Add kernel parameter to dump trace after RCU CPU stall warning · cdc694b2
      Paul E. McKenney authored
      This commit adds a rcu_cpu_stall_ftrace_dump kernel boot parameter, that,
      when set, causes the trace buffer to be dumped after an RCU CPU stall
      warning is printed.  This kernel boot parameter is disabled by default,
      maintaining compatibility with previous behavior.
      Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.ibm.com>
      cdc694b2
    • Paul E. McKenney's avatar
      rcu: Restore barrier() to rcu_read_lock() and rcu_read_unlock() · 1f3ebc82
      Paul E. McKenney authored
      Commit bb73c52b ("rcu: Don't disable preemption for Tiny and Tree
      RCU readers") removed the barrier() calls from rcu_read_lock() and
      rcu_write_lock() in CONFIG_PREEMPT=n&&CONFIG_PREEMPT_COUNT=n kernels.
      Within RCU, this commit was OK, but it failed to account for things like
      get_user() that can pagefault and that can be reordered by the compiler.
      Lack of the barrier() calls in rcu_read_lock() and rcu_read_unlock()
      can cause these page faults to migrate into RCU read-side critical
      sections, which in CONFIG_PREEMPT=n kernels could result in too-short
      grace periods and arbitrary misbehavior.  Please see commit 386afc91
      ("spinlocks and preemption points need to be at least compiler barriers")
      and Linus's commit 66be4e66 ("rcu: locking and unlocking need to
      always be at least barriers"), this last of which restores the barrier()
      call to both rcu_read_lock() and rcu_read_unlock().
      
      This commit removes barrier() calls that are no longer needed given that
      the addition of them in Linus's commit noted above.  The combination of
      this commit and Linus's commit effectively reverts commit bb73c52b
      ("rcu: Don't disable preemption for Tiny and Tree RCU readers").
      Reported-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
      Reported-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.ibm.com>
      [ paulmck: Fix embarrassing typo located by Alan Stern. ]
      1f3ebc82
    • Paul E. McKenney's avatar
      time/tick-broadcast: Fix tick_broadcast_offline() lockdep complaint · b55bd585
      Paul E. McKenney authored
      The TASKS03 and TREE04 rcutorture scenarios produce the following
      lockdep complaint:
      
      ------------------------------------------------------------------------
      
      ================================
      WARNING: inconsistent lock state
      5.2.0-rc1+ #513 Not tainted
      --------------------------------
      inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
      migration/1/14 [HC0[0]:SC0[0]:HE1:SE1] takes:
      (____ptrval____) (tick_broadcast_lock){?...}, at: tick_broadcast_offline+0xf/0x70
      {IN-HARDIRQ-W} state was registered at:
        lock_acquire+0xb0/0x1c0
        _raw_spin_lock_irqsave+0x3c/0x50
        tick_broadcast_switch_to_oneshot+0xd/0x40
        tick_switch_to_oneshot+0x4f/0xd0
        hrtimer_run_queues+0xf3/0x130
        run_local_timers+0x1c/0x50
        update_process_times+0x1c/0x50
        tick_periodic+0x26/0xc0
        tick_handle_periodic+0x1a/0x60
        smp_apic_timer_interrupt+0x80/0x2a0
        apic_timer_interrupt+0xf/0x20
        _raw_spin_unlock_irqrestore+0x4e/0x60
        rcu_nocb_gp_kthread+0x15d/0x590
        kthread+0xf3/0x130
        ret_from_fork+0x3a/0x50
      irq event stamp: 171
      hardirqs last  enabled at (171): [<ffffffff8a201a37>] trace_hardirqs_on_thunk+0x1a/0x1c
      hardirqs last disabled at (170): [<ffffffff8a201a53>] trace_hardirqs_off_thunk+0x1a/0x1c
      softirqs last  enabled at (0): [<ffffffff8a264ee0>] copy_process.part.56+0x650/0x1cb0
      softirqs last disabled at (0): [<0000000000000000>] 0x0
      
      other info that might help us debug this:
       Possible unsafe locking scenario:
      
             CPU0
             ----
        lock(tick_broadcast_lock);
        <Interrupt>
          lock(tick_broadcast_lock);
      
       *** DEADLOCK ***
      
      1 lock held by migration/1/14:
       #0: (____ptrval____) (clockevents_lock){+.+.}, at: tick_offline_cpu+0xf/0x30
      
      stack backtrace:
      CPU: 1 PID: 14 Comm: migration/1 Not tainted 5.2.0-rc1+ #513
      Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS Bochs 01/01/2011
      Call Trace:
       dump_stack+0x5e/0x8b
       print_usage_bug+0x1fc/0x216
       ? print_shortest_lock_dependencies+0x1b0/0x1b0
       mark_lock+0x1f2/0x280
       __lock_acquire+0x1e0/0x18f0
       ? __lock_acquire+0x21b/0x18f0
       ? _raw_spin_unlock_irqrestore+0x4e/0x60
       lock_acquire+0xb0/0x1c0
       ? tick_broadcast_offline+0xf/0x70
       _raw_spin_lock+0x33/0x40
       ? tick_broadcast_offline+0xf/0x70
       tick_broadcast_offline+0xf/0x70
       tick_offline_cpu+0x16/0x30
       take_cpu_down+0x7d/0xa0
       multi_cpu_stop+0xa2/0xe0
       ? cpu_stop_queue_work+0xc0/0xc0
       cpu_stopper_thread+0x6d/0x100
       smpboot_thread_fn+0x169/0x240
       kthread+0xf3/0x130
       ? sort_range+0x20/0x20
       ? kthread_cancel_delayed_work_sync+0x10/0x10
       ret_from_fork+0x3a/0x50
      
      ------------------------------------------------------------------------
      
      To reproduce, run the following rcutorture test:
      
              tools/testing/selftests/rcutorture/bin/kvm.sh --duration 5 --kconfig "CONFIG_DEBUG_LOCK_ALLOC=y CONFIG_PROVE_LOCKING=y" --configs "TASKS03 TREE04"
      
      It turns out that tick_broadcast_offline() was an innocent bystander.
      After all, interrupts are supposed to be disabled throughout
      take_cpu_down(), and therefore should have been disabled upon entry to
      tick_offline_cpu() and thus to tick_broadcast_offline().  This suggests
      that one of the CPU-hotplug notifiers was incorrectly enabling interrupts,
      and leaving them enabled on return.
      
      Some debugging code showed that the culprit was sched_cpu_dying().
      It had irqs enabled after return from sched_tick_stop().  Which in turn
      had irqs enabled after return from cancel_delayed_work_sync().  Which is a
      wrapper around __cancel_work_timer().  Which can sleep in the case where
      something else is concurrently trying to cancel the same delayed work,
      and as Thomas Gleixner pointed out on IRC, sleeping is a decidedly bad
      idea when you are invoked from take_cpu_down(), regardless of the state
      you leave interrupts in upon return.
      
      Code inspection located no reason why the delayed work absolutely
      needed to be canceled from sched_tick_stop():  The work is not
      bound to the outgoing CPU by design, given that the whole point is
      to collect statistics without disturbing the outgoing CPU.
      
      This commit therefore simply drops the cancel_delayed_work_sync() from
      sched_tick_stop().  Instead, a new ->state field is added to the tick_work
      structure so that the delayed-work handler function sched_tick_remote()
      can avoid reposting itself.  A cpu_is_offline() check is also added to
      sched_tick_remote() to avoid mucking with the state of an offlined CPU
      (though it does appear safe to do so).  The sched_tick_start() and
      sched_tick_stop() functions also update ->state, and sched_tick_start()
      also schedules the delayed work if ->state indicates that it is not
      already in flight.
      Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.ibm.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Reviewed-by: default avatarFrederic Weisbecker <frederic@kernel.org>
      [ paulmck: Apply Peter Zijlstra and Frederic Weisbecker atomics feedback. ]
      Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      b55bd585
    • Paul E. McKenney's avatar
      lockdep: Make print_lock() address visible · 519248f3
      Paul E. McKenney authored
      Security is a wonderful thing, but so is the ability to debug based on
      lockdep warnings.  This commit therefore makes lockdep lock addresses
      visible in the clear.
      Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.ibm.com>
      519248f3
  2. 28 Jul, 2019 13 commits
    • Linus Torvalds's avatar
      Linux 5.3-rc2 · 609488bc
      Linus Torvalds authored
      609488bc
    • Linus Torvalds's avatar
      Merge tag 'meminit-v5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux · c622fc5f
      Linus Torvalds authored
      Pull structleak fix from Kees Cook:
       "Disable gcc-based stack variable auto-init under KASAN (Arnd
        Bergmann).
      
        This fixes a bunch of build warnings under KASAN and the
        gcc-plugin-based stack auto-initialization features (which are
        arguably redundant, so better to let KASAN control this)"
      
      * tag 'meminit-v5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
        structleak: disable STRUCTLEAK_BYREF in combination with KASAN_STACK
      c622fc5f
    • Linus Torvalds's avatar
      Merge tag 'kbuild-fixes-v5.3' of... · 8e61ea11
      Linus Torvalds authored
      Merge tag 'kbuild-fixes-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
      
      Pull Kbuild fixes from Masahiro Yamada:
      
       - add compile_commands.json to .gitignore
      
       - fix false-positive warning from gen_compile_commands.py after
         allnoconfig build
      
       - remove unused code
      
      * tag 'kbuild-fixes-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
        kbuild: remove unused single-used-m
        gen_compile_commands: lower the entry count threshold
        .gitignore: Add compilation database file
        kbuild: remove unused objectify macro
      8e61ea11
    • Linus Torvalds's avatar
      Merge tag 'char-misc-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · 04ce9318
      Linus Torvalds authored
      Pull char/misc driver fixes from Greg KH:
       "Here are some small char and misc driver fixes for 5.3-rc2 to resolve
        some reported issues.
      
        Nothing major at all, some binder bugfixes for issues found, some new
        mei device ids, firmware building warning fixes, habanalabs fixes, a
        few other build fixes, and a MAINTAINERS update.
      
        All of these have been in linux-next with no reported issues"
      
      * tag 'char-misc-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
        test_firmware: fix a memory leak bug
        hpet: Fix division by zero in hpet_time_div()
        eeprom: make older eeprom drivers select NVMEM_SYSFS
        vmw_balloon: Remove Julien from the maintainers list
        fpga-manager: altera-ps-spi: Fix build error
        mei: me: add mule creek canyon (EHL) device ids
        binder: prevent transactions to context manager from its own process.
        binder: Set end of SG buffer area properly.
        firmware: Fix missing inline
        firmware: fix build errors in paged buffer handling code
        habanalabs: don't reset device when getting VRHOT
        habanalabs: use %pad for printing a dma_addr_t
      04ce9318
    • Linus Torvalds's avatar
      Merge tag 'tty-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 572782b2
      Linus Torvalds authored
      Pull tty fixes from Greg KH:
       "Here are two tty/vt fixes:
      
         - delete the netx-serial driver as the arch has been removed, no need
           to keep the serial driver for it around either.
      
         - vt console_lock fix to resolve a reported noisy warning at runtime
      
        Both of these have been in linux-next with no reported issues"
      
      * tag 'tty-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        vt: Grab console_lock around con_is_bound in show_bind
        tty: serial: netx: Delete driver
      572782b2
    • Linus Torvalds's avatar
      Merge tag 'spdx-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx · ad28fd1c
      Linus Torvalds authored
      Pull SPDX fixes from Greg KH:
       "Here are some small SPDX fixes for 5.3-rc2 for things that came in
        during the 5.3-rc1 merge window that we previously missed.
      
        Only three small patches here:
      
         - two uapi patches to resolve some SPDX tags that were not correct
      
         - fix an invalid SPDX tag in the iomap Makefile file
      
        All have been properly reviewed on the public mailing lists"
      
      * tag 'spdx-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx:
        iomap: fix Invalid License ID
        treewide: remove SPDX "WITH Linux-syscall-note" from kernel-space headers again
        treewide: add "WITH Linux-syscall-note" to SPDX tag of uapi headers
      ad28fd1c
    • Linus Torvalds's avatar
      Merge tag 'usb-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 29af915c
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here are some small fixes for 5.3-rc2. All of these resolve some
        reported issues, some more than others :)
      
        Included in here is:
      
         - xhci fix for an annoying issue with odd devices
      
         - reversion of some usb251xb patches that should not have been merged
      
         - usb pci quirk additions and fixups
      
         - usb storage fix
      
         - usb host controller error test fix
      
        All of these have been in linux-next with no reported issues"
      
      * tag 'usb-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        xhci: Fix crash if scatter gather is used with Immediate Data Transfer (IDT).
        usb: usb251xb: Reallow swap-dx-lanes to apply to the upstream port
        Revert "usb: usb251xb: Add US port lanes inversion property"
        Revert "usb: usb251xb: Add US lanes inversion dts-bindings"
        usb: wusbcore: fix unbalanced get/put cluster_id
        usb/hcd: Fix a NULL vs IS_ERR() bug in usb_hcd_setup_local_mem()
        usb-storage: Add a limitation for blk_queue_max_hw_sectors()
        usb: pci-quirks: Minor cleanup for AMD PLL quirk
        usb: pci-quirks: Correct AMD PLL quirk detection
      29af915c
    • Linus Torvalds's avatar
      Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc · 5bb575bc
      Linus Torvalds authored
      Pull ARM SoC fixes from Olof Johansson:
       "Here's the first batch of fixes for this release cycle.
      
        Main diffstat here is the re-deletion of netx. I messed up and most
        likely didn't remove the files from the index when I test-merged this
        and saw conflicts, and from there on out 'git rerere' remembered the
        mistake and I missed checking it. Here it's done again as expected.
      
        Besides that:
      
         - A defconfig refresh + enabling of new drivers for u8500
      
         - i.MX fixlets for i2c/SAI/pinmux
      
         - sleep.S build fix for Davinci
      
         - Broadcom devicetree build/warning fix"
      
      * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
        ARM: defconfig: u8500: Add new drivers
        ARM: defconfig: u8500: Refresh defconfig
        ARM: dts: bcm: bcm47094: add missing #cells for mdio-bus-mux
        ARM: davinci: fix sleep.S build error on ARMv4
        arm64: dts: imx8mq: fix SAI compatible
        arm64: dts: imx8mm: Correct SAI3 RXC/TXFS pin's mux option #1
        ARM: dts: imx6ul: fix clock frequency property name of I2C buses
        ARM: Delete netx a second time
        ARM: dts: imx7ulp: Fix usb-phy unit address format
      5bb575bc
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a9815a4f
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "A set of x86 fixes and functional updates:
      
         - Prevent stale huge I/O TLB mappings on 32bit. A long standing bug
           which got exposed by KPTI support for 32bit
      
         - Prevent bogus access_ok() warnings in arch_stack_walk_user()
      
         - Add display quirks for Lenovo devices which have height and width
           swapped
      
         - Add the missing CR2 fixup for 32 bit async pagefaults. Fallout of
           the CR2 bug fix series.
      
         - Unbreak handling of force enabled HPET by moving the 'is HPET
           counting' check back to the original place.
      
         - A more accurate check for running on a hypervisor platform in the
           MDS mitigation code. Not perfect, but more accurate than the
           previous one.
      
         - Update a stale and confusing comment vs. IRQ stacks"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/speculation/mds: Apply more accurate check on hypervisor platform
        x86/hpet: Undo the early counter is counting check
        x86/entry/32: Pass cr2 to do_async_page_fault()
        x86/irq/64: Update stale comment
        x86/sysfb_efi: Add quirks for some devices with swapped width and height
        x86/stacktrace: Prevent access_ok() warnings in arch_stack_walk_user()
        mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy()
        x86/mm: Sync also unmappings in vmalloc_sync_all()
        x86/mm: Check for pfn instead of page in vmalloc_sync_one()
      a9815a4f
    • Linus Torvalds's avatar
      Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · e24ce84e
      Linus Torvalds authored
      Pull scheduler fixes from Thomas Gleixner:
       "Two fixes for the fair scheduling class:
      
         - Prevent freeing memory which is accessible by concurrent readers
      
         - Make the RCU annotations for numa groups consistent"
      
      * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/fair: Use RCU accessors consistently for ->numa_group
        sched/fair: Don't free p->numa_faults with concurrent readers
      e24ce84e
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 750991f9
      Linus Torvalds authored
      Pull perf fixes from Thomas Gleixner:
       "A pile of perf related fixes:
      
        Kernel:
         - Fix SLOTS PEBS event constraints for Icelake CPUs
      
         - Add the missing mask bit to allow counting hardware generated
           prefetches on L3 for Icelake CPUs
      
         - Make the test for hypervisor platforms more accurate (as far as
           possible)
      
         - Handle PMUs correctly which override event->cpu
      
         - Yet another missing fallthrough annotation
      
        Tools:
           perf.data:
              - Fix loading of compressed data split across adjacent records
              - Fix buffer size setting for processing CPU topology perf.data
                header.
      
           perf stat:
              - Fix segfault for event group in repeat mode
              - Always separate "stalled cycles per insn" line, it was being
                appended to the "instructions" line.
      
           perf script:
              - Fix --max-blocks man page description.
              - Improve man page description of metrics.
              - Fix off by one in brstackinsn IPC computation.
      
           perf probe:
              - Avoid calling freeing routine multiple times for same pointer.
      
           perf build:
              - Do not use -Wshadow on gcc < 4.8, avoiding too strict warnings
                treated as errors, breaking the build"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/x86/intel: Mark expected switch fall-throughs
        perf/core: Fix creating kernel counters for PMUs that override event->cpu
        perf/x86: Apply more accurate check on hypervisor platform
        perf/x86/intel: Fix invalid Bit 13 for Icelake MSR_OFFCORE_RSP_x register
        perf/x86/intel: Fix SLOTS PEBS event constraint
        perf build: Do not use -Wshadow on gcc < 4.8
        perf probe: Avoid calling freeing routine multiple times for same pointer
        perf probe: Set pev->nargs to zero after freeing pev->args entries
        perf session: Fix loading of compressed data split across adjacent records
        perf stat: Always separate stalled cycles per insn
        perf stat: Fix segfault for event group in repeat mode
        perf tools: Fix proper buffer size for feature processing
        perf script: Fix off by one in brstackinsn IPC computation
        perf script: Improve man page description of metrics
        perf script: Fix --max-blocks man page description
      750991f9
    • Linus Torvalds's avatar
      Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 431f288e
      Linus Torvalds authored
      Pull locking fixes from Thomas Gleixner:
       "A set of locking fixes:
      
         - Address the fallout of the rwsem rework. Missing ACQUIREs and a
           sanity check to prevent a use-after-free
      
         - Add missing checks for unitialized mutexes when mutex debugging is
           enabled.
      
         - Remove the bogus code in the generic SMP variant of
           arch_futex_atomic_op_inuser()
      
         - Fixup the #ifdeffery in lockdep to prevent compile warnings"
      
      * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        locking/mutex: Test for initialized mutex
        locking/lockdep: Clean up #ifdef checks
        locking/lockdep: Hide unused 'class' variable
        locking/rwsem: Add ACQUIRE comments
        tty/ldsem, locking/rwsem: Add missing ACQUIRE to read_failed sleep loop
        lcoking/rwsem: Add missing ACQUIRE to read_slowpath sleep loop
        locking/rwsem: Add missing ACQUIRE to read_slowpath exit when queue is empty
        locking/rwsem: Don't call owner_on_cpu() on read-owner
        futex: Cleanup generic SMP variant of arch_futex_atomic_op_inuser()
      431f288e
    • Linus Torvalds's avatar
      Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 13fbe991
      Linus Torvalds authored
      Pull objtool fix from Thomas Gleixner:
       "A single robustness fix for objtool to handle unbalanced CLAC
        invocations under all circumstances"
      
      * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        objtool: Improve UACCESS coverage
      13fbe991
  3. 27 Jul, 2019 10 commits
    • Linus Torvalds's avatar
      Merge tag 'Wimplicit-fallthrough-5.3-rc2' of... · 88c50834
      Linus Torvalds authored
      Merge tag 'Wimplicit-fallthrough-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux
      
      Pull Wimplicit-fallthrough enablement from Gustavo A. R. Silva:
       "This marks switch cases where we are expecting to fall through, and
        globally enables the -Wimplicit-fallthrough option in the main
        Makefile.
      
        Finally, some missing-break fixes that have been tagged for -stable:
      
         - drm/amdkfd: Fix missing break in switch statement
      
         - drm/amdgpu/gfx10: Fix missing break in switch statement
      
        With these changes, we completely get rid of all the fall-through
        warnings in the kernel"
      
      * tag 'Wimplicit-fallthrough-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux:
        Makefile: Globally enable fall-through warning
        drm/i915: Mark expected switch fall-throughs
        drm/amd/display: Mark expected switch fall-throughs
        drm/amdkfd/kfd_mqd_manager_v10: Avoid fall-through warning
        drm/amdgpu/gfx10: Fix missing break in switch statement
        drm/amdkfd: Fix missing break in switch statement
        perf/x86/intel: Mark expected switch fall-throughs
        mtd: onenand_base: Mark expected switch fall-through
        afs: fsclient: Mark expected switch fall-throughs
        afs: yfsclient: Mark expected switch fall-throughs
        can: mark expected switch fall-throughs
        firewire: mark expected switch fall-throughs
      88c50834
    • Linus Torvalds's avatar
      Merge tag 's390-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux · 43e317c1
      Linus Torvalds authored
      Pull s390 updates from Heiko Carstens:
      
       - Add ABI to kernel image file which allows e.g. the file utility to
         figure out the kernel version.
      
       - Wire up clone3 system call.
      
       - Add support for kasan bitops instrumentation.
      
       - uapi header cleanup: use __u{16,32,64} instead of uint{16,32,64}_t.
      
       - Provide proper ARCH_ZONE_DMA_BITS so the s390 DMA zone is correctly
         defined with 2 GB instead of the default value of 1 MB.
      
       - Farhan Ali leaves the group of vfio-ccw maintainers.
      
       - Various small vfio-ccw fixes.
      
       - Add missing locking for airq_areas array in virtio code.
      
       - Minor qdio improvements.
      
      * tag 's390-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
        MAINTAINERS: vfio-ccw: Remove myself as the maintainer
        s390/mm: use shared variables for sysctl range check
        virtio/s390: fix race on airq_areas[]
        s390/dma: provide proper ARCH_ZONE_DMA_BITS value
        s390/kasan: add bitops instrumentation
        s390/bitops: make test functions return bool
        s390: wire up clone3 system call
        kbuild: enable arch/s390/include/uapi/asm/zcrypt.h for uapi header test
        s390: use __u{16,32,64} instead of uint{16,32,64}_t in uapi header
        s390/hypfs: fix a typo in the name of a function
        s390/qdio: restrict QAOB usage to IQD unicast queues
        s390/qdio: add sanity checks to the fast-requeue path
        s390: enable detection of kernel version from bzImage
        Documentation: fix vfio-ccw doc
        vfio-ccw: Update documentation for csch/hsch
        vfio-ccw: Don't call cp_free if we are processing a channel program
        vfio-ccw: Set pa_nr to 0 if memory allocation fails for pa_iova_pfn
        vfio-ccw: Fix memory leak and don't call cp_free in cp_init
        vfio-ccw: Fix misleading comment when setting orb.cmd.c64
      43e317c1
    • Linus Torvalds's avatar
      Merge tag 'devicetree-fixes-for-5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux · 5efbd937
      Linus Torvalds authored
      Pull Devicetree fixes from Rob Herring:
       "The nvmem changes would typically go thru Greg's tree, but they were
        missed in the merge window. [ Acked by Greg ]
      
        Summary:
      
         - Fix mismatches in $id values and actual filenames. Now checked by
           tools.
      
         - Convert nvmem binding to DT schema
      
         - Fix a typo in of_property_read_bool() kerneldoc
      
         - Remove some redundant description in al-fic interrupt-controller"
      
      * tag 'devicetree-fixes-for-5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
        dt-bindings: Fix more $id value mismatches filenames
        dt-bindings: nvmem: SID: Fix the examples node names
        dt-bindings: nvmem: Add YAML schemas for the generic NVMEM bindings
        of: Fix typo in kerneldoc
        dt-bindings: interrupt-controller: al-fic: remove redundant binding
        dt-bindings: clk: allwinner,sun4i-a10-ccu: Correct path in $id
      5efbd937
    • Linus Torvalds's avatar
      Merge tag 'libnvdimm-fixes-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · 523634db
      Linus Torvalds authored
      Pull libnvdimm fixes from Dan Williams:
       "A collection of locking and async operations fixes for v5.3-rc2. These
        had been soaking in a branch targeting the merge window, but missed
        due to a regression hunt. This fixed up version has otherwise been in
        -next this past week with no reported issues.
      
        In order to gain confidence in the locking changes the pull also
        includes a debug / instrumentation patch to enable lockdep coverage
        for libnvdimm subsystem operations that depend on the device_lock for
        exclusion. As mentioned in the changelog it is a hack, but it works
        and documents the locking expectations of the sub-system in a way that
        others can use lockdep to verify. The driver core touches got an ack
        from Greg.
      
        Summary:
      
         - Fix duplicate device_unregister() calls (multiple threads competing
           to do unregister work when scheduling device removal from a sysfs
           attribute of the self-same device).
      
         - Fix badblocks registration order bug. Ensure region badblocks are
           initialized in advance of namespace registration.
      
         - Fix a deadlock between the bus lock and probe operations.
      
         - Export device-core infrastructure to coordinate async operations
           via the device ->dead state.
      
         - Add device-core infrastructure to validate device_lock() usage with
           lockdep"
      
      * tag 'libnvdimm-fixes-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
        driver-core, libnvdimm: Let device subsystems add local lockdep coverage
        libnvdimm/bus: Fix wait_nvdimm_bus_probe_idle() ABBA deadlock
        libnvdimm/bus: Stop holding nvdimm_bus_list_mutex over __nd_ioctl()
        libnvdimm/bus: Prepare the nd_ioctl() path to be re-entrant
        libnvdimm/region: Register badblocks before namespaces
        libnvdimm/bus: Prevent duplicate device_unregister() calls
        drivers/base: Introduce kill_device()
      523634db
    • Masahiro Yamada's avatar
      kbuild: remove unused single-used-m · b25e8a23
      Masahiro Yamada authored
      This is unused since commit 9f69a496 ("kbuild: split out *.mod out
      of {single,multi}-used-m rules").
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      b25e8a23
    • Masahiro Yamada's avatar
      gen_compile_commands: lower the entry count threshold · cb36955a
      Masahiro Yamada authored
      Running gen_compile_commands.py after building the kernel with
      allnoconfig gave this:
      
      $ ./scripts/gen_compile_commands.py
      WARNING: Found 449 entries. Have you compiled the kernel?
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      cb36955a
    • Toru Komatsu's avatar
      .gitignore: Add compilation database file · 26c4c71b
      Toru Komatsu authored
      This file is used by clangd to use language server protocol.
      It can be generated at each compile using scripts/gen_compile_commands.py.
      Therefore it is different depending on the environment and should be
      ignored.
      Signed-off-by: default avatarToru Komatsu <k0ma@utam0k.jp>
      Reviewed-by: default avatarNick Desaulniers <ndesaulniers@google.com>
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      26c4c71b
    • Masahiro Yamada's avatar
      kbuild: remove unused objectify macro · b2eff092
      Masahiro Yamada authored
      Commit 415008af ("docs-rst: convert lsm from DocBook to ReST")
      removed the last users of this macro.
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      b2eff092
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20190726-2' of git://git.kernel.dk/linux-block · 5168afe6
      Linus Torvalds authored
      Pull block DMA segment fix from Jens Axboe:
       "Here's the virtual boundary segment size fix"
      
      * tag 'for-linus-20190726-2' of git://git.kernel.dk/linux-block:
        block: fix max segment size handling in blk_queue_virt_boundary
      5168afe6
    • Linus Torvalds's avatar
      Merge tag 'selinux-pr-20190726' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux · 40233e7c
      Linus Torvalds authored
      Pull selinux fix from Paul Moore:
       "One small SELinux patch to add some proper bounds/overflow checking
        when adding a new sid/secid"
      
      * tag 'selinux-pr-20190726' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
        selinux: check sidtab limit before adding a new entry
      40233e7c
  4. 26 Jul, 2019 9 commits
    • Rob Herring's avatar
      dt-bindings: Fix more $id value mismatches filenames · e1ff7390
      Rob Herring authored
      The path in the schema '$id' values are wrong. Fix them.
      Signed-off-by: default avatarRob Herring <robh@kernel.org>
      e1ff7390
    • Maxime Ripard's avatar
      dt-bindings: nvmem: SID: Fix the examples node names · ce842e73
      Maxime Ripard authored
      Now that the examples are validated, the examples in the SID binding
      generates an error since the node names aren't one of the valid ones.
      
      Let's switch for one that is ok.
      Signed-off-by: default avatarMaxime Ripard <maxime.ripard@bootlin.com>
      Signed-off-by: default avatarRob Herring <robh@kernel.org>
      ce842e73
    • Maxime Ripard's avatar
      dt-bindings: nvmem: Add YAML schemas for the generic NVMEM bindings · c61f0256
      Maxime Ripard authored
      The nvmem providers and consumers have a bunch of generic properties that
      are needed in a device tree. Add a YAML schemas for those.
      Reviewed-by: default avatarRob Herring <robh@kernel.org>
      Signed-off-by: default avatarMaxime Ripard <maxime.ripard@bootlin.com>
      [Srini: Changed licence to (GPL-2.0 OR BSD-2-Clause)]
      Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
      Signed-off-by: default avatarRob Herring <robh@kernel.org>
      c61f0256
    • Thierry Reding's avatar
      of: Fix typo in kerneldoc · f1765a18
      Thierry Reding authored
      "Findfrom" is not a word. Replace the function synopsis by something
      that makes sense.
      Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
      Signed-off-by: default avatarRob Herring <robh@kernel.org>
      f1765a18
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · a6898389
      Linus Torvalds authored
      Pull SCSI fixes from James Bottomley:
       "Nine fixes: The most important core one is the dma_max_mapping_size
        fix that corrects the boot problem Gunter Roeck was having. A couple
        of other driver only fixes are significant, like the cxgbi selector
        support addition, the alua 2 second delay and the fdomain build fix"
      
      * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        scsi: scsi_dh_alua: always use a 2 second delay before retrying RTPG
        scsi: ibmvfc: fix WARN_ON during event pool release
        scsi: fcoe: fix a typo
        scsi: megaraid_sas: Make some functions static
        scsi: megaraid_sas: fix panic on loading firmware crashdump
        scsi: megaraid_sas: fix spelling mistake "megarid_sas" -> "megaraid_sas"
        scsi: core: fix the dma_max_mapping_size call
        scsi: fdomain: fix building pcmcia front-end
        scsi: target: cxgbit: add support for IEEE_8021QAZ_APP_SEL_STREAM selector
      a6898389
    • Linus Torvalds's avatar
      Merge tag 'drm-fixes-2019-07-26' of git://anongit.freedesktop.org/drm/drm · e2921f9f
      Linus Torvalds authored
      Pull drm fixes from Daniel Vetter:
       "Dave seems to collect an entire streak of things happening, so again
        me typing pull summary.
      
        Nothing nefarious here, most of the fixes are for new stuff or things
        users won't see. The amd-display patches are a bit different, and very
        much look like they should have at least some cc: stable tags. Might
        be amd is a bit too comfortable with their internal tree and not
        enough looking at upstream. Dave&me are looking into this, in case
        something needs rectified with process here.
      
        Also no intel fixes pull, but intel CI is general become rather good,
        still I guess expect a notch more for -rc3.
      
        Summary:
      
        amdgpu:
         - fixes for (new in 5.3) hw support (vega20, navi)
         - disable RAS
         - lots of display fixes all over (audio, DSC, dongle, clock mgr)
      
        ttm:
         - fix dma_free_attrs calls to appease dma debugging
      
        msm:
         - fixes for dma-api, locking debug and compiler splats
      
        core:
         - fix cmdline mode to not apply rotation if not specified (new in 5.3)
         - compiler warn fix"
      
      * tag 'drm-fixes-2019-07-26' of git://anongit.freedesktop.org/drm/drm: (46 commits)
        drm/amd/display: Set enabled to false at start of audio disable
        drm/amdgpu/smu: move fan rpm query into the asic specific code
        drm/amd/powerplay: custom peak clock freq for navi10
        drm: silence variable 'conn' set but not used
        drm/msm: stop abusing dma_map/unmap for cache
        drm/msm/dpu: Correct dpu encoder spinlock initialization
        drm/msm: correct NULL pointer dereference in context_init
        drm/amd/display: handle active dongle port type is DP++ or DP case
        drm/amd/display: do not read link setting if edp not connected
        drm/amd/display: Increase size of audios array
        drm/amd/display: drop ASSERT() if eDP panel is not connected
        drm/amd/display: Only enable audio if speaker allocation exists
        drm/amd/display: Fix dc_create failure handling and 666 color depths
        drm/amd/display: allocate 4 ddc engines for RV2
        drm/amd/display: put back front end initialization sequence
        drm/amd/display: Wait for flip to complete
        drm/amd/display: Change min_h_sync_width from 8 to 4
        drm/amd/display: use encoder's engine id to find matched free audio device
        drm/amd/display: fix DMCU hang when going into Modern Standby
        drm/amd/display: Disable Audio on reinitialize hardware
        ...
      e2921f9f
    • Christoph Hellwig's avatar
      block: fix max segment size handling in blk_queue_virt_boundary · c6c84f78
      Christoph Hellwig authored
      We should only set the max segment size to unlimited if we actually
      have a virt boundary.  Otherwise we accidentally clear that limit
      when called from the SCSI midlayer, which always calls
      blk_queue_virt_boundary, even if that mask is 0.
      
      Fixes: 7ad388d8 ("scsi: core: add a host / host template field for the virt boundary")
      Reported-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      c6c84f78
    • Linus Torvalds's avatar
      Merge tag 'docs-5.3-1' of git://git.lwn.net/linux · 3ea54d9b
      Linus Torvalds authored
      Pull documentation fixes from Jonathan Corbet:
       "This is mostly a set of follow-on fixes from Mauro fixing various
        fallout from the massive RST conversion; a few other small fixes as
        well"
      
      * tag 'docs-5.3-1' of git://git.lwn.net/linux: (21 commits)
        docs: phy: Drop duplicate 'be made'
        doc:it_IT: translations in process/
        docs/vm: transhuge: fix typo in madvise reference
        doc:it_IT: rephrase statement
        doc:it_IT: align translation to mainline
        docs: load_config.py: ensure subdirs end with "/"
        docs: virtual: add it to the documentation body
        docs: remove extra conf.py files
        docs: load_config.py: avoid needing a conf.py just due to LaTeX docs
        scripts/sphinx-pre-install: seek for Noto CJK fonts for pdf output
        scripts/sphinx-pre-install: cleanup Gentoo checks
        scripts/sphinx-pre-install: fix latexmk dependencies
        scripts/sphinx-pre-install: don't use LaTeX with CentOS 7
        scripts/sphinx-pre-install: fix script for RHEL/CentOS
        docs: conf.py: only use CJK if the font is available
        docs: conf.py: add CJK package needed by translations
        docs: pdf: add all Documentation/*/index.rst to PDF output
        docs: fix broken doc references due to renames
        docs: power: add it to to the main documentation index
        docs: powerpc: convert docs to ReST and rename to *.rst
        ...
      3ea54d9b
    • Linus Torvalds's avatar
      Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 0ed28866
      Linus Torvalds authored
      Pull arm64 fixes from Will Deacon:
       "There's more here than we usually have at this stage, but that's
        mainly down to the stacktrace changes which came in slightly too late
        for the merge window.
      
        Summary:
      
         - Big bad batch of MAINTAINERS updates
      
         - Fix handling of SP alignment fault exceptions
      
         - Fix PSTATE.SSBS handling on heterogeneous systems
      
         - Fix fallout from moving to the generic vDSO implementation
      
         - Fix stack unwinding in the face of frame corruption
      
         - Fix off-by-one in IORT code
      
         - Minor SVE cleanups"
      
      * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
        ACPI/IORT: Fix off-by-one check in iort_dev_find_its_id()
        arm64: entry: SP Alignment Fault doesn't write to FAR_EL1
        arm64: Force SSBS on context switch
        MAINTAINERS: Update my email address
        MAINTAINERS: Update my email address
        MAINTAINERS: Fix spelling mistake in my name
        MAINTAINERS: Update my email address to @kernel.org
        arm64: mm: Drop pte_huge()
        arm64/sve: Fix a couple of magic numbers for the Z-reg count
        arm64/sve: Factor out FPSIMD to SVE state conversion
        arm64: stacktrace: Better handle corrupted stacks
        arm64: stacktrace: Factor out backtrace initialisation
        arm64: stacktrace: Constify stacktrace.h functions
        arm64: vdso: Cleanup Makefiles
        arm64: vdso: fix flip/flop vdso build bug
        arm64: vdso: Fix population of AT_SYSINFO_EHDR for compat vdso
      0ed28866