1. 24 Aug, 2016 4 commits
  2. 21 Aug, 2016 3 commits
  3. 20 Aug, 2016 2 commits
    • Helge Deller's avatar
      parisc: Fix order of EREFUSED define in errno.h · 3eb53b20
      Helge Deller authored
      When building gccgo in userspace, errno.h gets parsed and the go include file
      sysinfo.go is generated.
      
      Since EREFUSED is defined to the same value as ECONNREFUSED, and ECONNREFUSED
      is defined later on in errno.h, this leads to go complaining that EREFUSED
      isn't defined yet.
      
      Fix this trivial problem by moving the define of EREFUSED down after
      ECONNREFUSED in errno.h (and clean up the indenting while touching this line).
      Signed-off-by: default avatarHelge Deller <deller@gmx.de>
      Cc: stable@vger.kernel.org
      3eb53b20
    • Helge Deller's avatar
      parisc: Fix automatic selection of cr16 clocksource · ae141830
      Helge Deller authored
      Commit 54b66800 (parisc: Add native high-resolution sched_clock()
      implementation) added support to use the CPU-internal cr16 counters as reliable
      clocksource with the help of HAVE_UNSTABLE_SCHED_CLOCK.
      
      Sadly the commit missed to remove the hack which prevented cr16 to become the
      default clocksource even on SMP systems.
      Signed-off-by: default avatarHelge Deller <deller@gmx.de>
      Cc: stable@vger.kernel.org # 4.7+
      ae141830
  4. 19 Aug, 2016 7 commits
    • Linus Torvalds's avatar
      Make the hardened user-copy code depend on having a hardened allocator · 6040e576
      Linus Torvalds authored
      The kernel test robot reported a usercopy failure in the new hardened
      sanity checks, due to a page-crossing copy of the FPU state into the
      task structure.
      
      This happened because the kernel test robot was testing with SLOB, which
      doesn't actually do the required book-keeping for slab allocations, and
      as a result the hardening code didn't realize that the task struct
      allocation was one single allocation - and the sanity checks fail.
      
      Since SLOB doesn't even claim to support hardening (and you really
      shouldn't use it), the straightforward solution is to just make the
      usercopy hardening code depend on the allocator supporting it.
      Reported-by: default avatarkernel test robot <xiaolong.ye@intel.com>
      Cc: Kees Cook <keescook@chromium.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      6040e576
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · 8cc9dddd
      Linus Torvalds authored
      Pull i2c fixes from Wolfram Sang:
       "I2C has some pretty standard driver bugfixes and one minor cleanup"
      
      * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        i2c: meson: Use complete() instead of complete_all()
        i2c: brcmstb: Use complete() instead of complete_all()
        i2c: bcm-kona: Use complete() instead of complete_all()
        i2c: bcm-iproc: Use complete() instead of complete_all()
        i2c: at91: fix support of the "alternative command" feature
        i2c: ocores: add missed clk_disable_unprepare() on failure paths
        i2c: cros-ec-tunnel: Fix usage of cros_ec_cmd_xfer()
        i2c: mux: demux-pinctrl: properly roll back when adding adapter fails
      8cc9dddd
    • Linus Torvalds's avatar
      Merge tag 'dm-4.8-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm · 43f4d36c
      Linus Torvalds authored
      Pull device mapper fixes from Mike Snitzer:
      
       - a stable fix for DM round robin multipath path selector to disable
         preemption before using this_cpu_ptr()
      
       - a slight increase in DM crypt's mempool reserves to make swap ontop
         of DM crypt more performant
      
       - a few DM raid fixes to issues found while testing changes that were
         merged in v4.8-rc1
      
      * tag 'dm-4.8-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
        dm raid: support raid0 with missing metadata devices
        dm raid: enhance attempt_restore_of_faulty_devices() to support more devices
        dm raid: fix restoring of failed devices regression
        dm raid: fix frozen recovery regression
        dm crypt: increase mempool reserve to better support swapping
        dm round robin: do not use this_cpu_ptr() without having preemption disabled
      43f4d36c
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · b2848792
      Linus Torvalds authored
      Pull SCSI fixes from James Bottomley:
       "Six fairly small fixes.  The ipr, mpt3sas and ses ones all trigger
        oopses.  The megaraid one fixes an attach failure on io mapped only
        cards, the fcoe one is an obvious problem in the error path and the
        aacraid one is a theoretical security issue (ability to trick the
        kernel into a buffer overrun)"
      
      * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        ses: Fix racy cleanup of /sys in remove_dev()
        mpt3sas: Fix resume on WarpDrive flash cards
        ipr: Fix sync scsi scan
        megaraid_sas: Fix probing cards without io port
        aacraid: Check size values after double-fetch from user
        fcoe: Use kfree_skb() instead of kfree()
      b2848792
    • Linus Torvalds's avatar
      Merge tag 'usb-4.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 080ebb15
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here are a number of USB fixes for reported issues for your tree.
      
        The normal amount of gadget fixes, xhci fixes, new device ids, and a
        few other minor things.  All of them have been in linux-next for a
        while, the full details are in the shortlog below"
      
      * tag 'usb-4.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (43 commits)
        xhci: don't dereference a xhci member after removing xhci
        usb: xhci: Fix panic if disconnect
        xhci: really enqueue zero length TRBs.
        xhci: always handle "Command Ring Stopped" events
        cdc-acm: fix wrong pipe type on rx interrupt xfers
        usb: misc: usbtest: add fix for driver hang
        usb: dwc3: gadget: stop processing on HWO set
        usb: dwc3: don't set last bit for ISOC endpoints
        usb: gadget: rndis: free response queue during REMOTE_NDIS_RESET_MSG
        usb: udc: core: fix error handling
        usb: gadget: fsl_qe_udc: off by one in setup_received_handle()
        usb/gadget: fix gadgetfs aio support.
        usb: gadget: composite: Fix return value in case of error
        usb: gadget: uvc: Fix return value in case of error
        usb: gadget: fix check in sync read from ep in gadgetfs
        usb: misc: usbtest: usbtest_do_ioctl may return positive integer
        usb: dwc3: fix missing platform_set_drvdata() in dwc3_of_simple_probe()
        usb: phy: omap-otg: Fix missing platform_set_drvdata() in omap_otg_probe()
        usb: gadget: configfs: add mutex lock before unregister gadget
        usb: gadget: u_ether: fix dereference after null check coverify warning
        ...
      080ebb15
    • Linus Torvalds's avatar
      Merge tag 'xfs-iomap-for-linus-4.8-rc3' of... · a8414fa3
      Linus Torvalds authored
      Merge tag 'xfs-iomap-for-linus-4.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs
      
      Pull xfs and iomap fixes from Dave Chinner:
       "Changes in this update:
      
        Regression fixes for XFS changes introduce in 4.8-rc1:
         - buffer IO accounting assert failure
         - ENOSPC block accounting reservation issue
         - DAX IO path page cache invalidation fix
         - rmapbt on-disk block count in agf
         - correct classification of rmap block type when updating AGFL.
         - iomap support for attribute fork mapping
      
        Regression fixes for iomap infrastructure in 4.8-rc1:
         - fiemap: honor FIEMAP_FLAG_SYNC
         - fiemap: implement FIEMAP_FLAG_XATTR support to fix XFS regression
         - make mark_page_accessed and pagefault_disable usage consistent with
           other IO paths"
      
      * tag 'xfs-iomap-for-linus-4.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs:
        xfs: remove OWN_AG rmap when allocating a block from the AGFL
        xfs: (re-)implement FIEMAP_FLAG_XATTR
        xfs: simplify xfs_file_iomap_begin
        iomap: mark ->iomap_end as optional
        iomap: prepare iomap_fiemap for attribute mappings
        iomap: fiemap should honor the FIEMAP_FLAG_SYNC flag
        iomap: remove superflous pagefault_disable from iomap_write_actor
        iomap: remove superflous mark_page_accessed from iomap_write_actor
        xfs: store rmapbt block count in the AGF
        xfs: don't invalidate whole file on DAX read/write
        xfs: fix bogus space reservation in xfs_iomap_write_allocate
        xfs: don't assert fail on non-async buffers on ioacct decrement
      a8414fa3
    • Linus Torvalds's avatar
      Merge tag 'hwmon-for-linus-v4.8-rc2' of... · 3f318b3c
      Linus Torvalds authored
      Merge tag 'hwmon-for-linus-v4.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
      
      Pull hwmon fixes from Guenter Roeck:
       "Fix a bug in it87 driver and URLs in ftsteutates driver"
      
      * tag 'hwmon-for-linus-v4.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
        hwmon: (ftsteutates) Correct ftp urls in driver documentation
        hwmon: (it87) Features mask must be 32 bit wide
      3f318b3c
  5. 18 Aug, 2016 24 commits
    • Linus Torvalds's avatar
      Merge tag 'drm-fixes-for-4.8-rc3-2' of git://people.freedesktop.org/~airlied/linux · 952b159f
      Linus Torvalds authored
      Pull more drm fixes from Dave Airlie:
       "Daniel pointed out I'd missed some i915 fixes, and I also found a
        single etnaviv fix I missed.
      
        So here they are"
      
      * tag 'drm-fixes-for-4.8-rc3-2' of git://people.freedesktop.org/~airlied/linux:
        drm/etnaviv: take GPU lock later in the submit process
        drm/i915: Fix modeset handling during gpu reset, v5.
        drm/i915: fix aliasing_ppgtt leak
        drm/i915: fix WaInsertDummyPushConstPs
        drm/i915: Fix iboost setting for SKL Y/U DP DDI buffer translation entry 2
        drm/i915/gen9: Give one extra block per line for SKL plane WM calculations
        drm/i915: Acquire audio powerwell for HD-Audio registers
        drm/i915: Add missing rpm wakelock to GGTT pread
        drm/i915/fbc: FBC causes display flicker when VT-d is enabled on Skylake
        drm/i915: Clean up the extra RPM ref on CHV with i915.enable_rc6=0
        drm/i915: Program iboost settings for HDMI/DVI on SKL
        drm/i915: Fix iboost setting for DDI with 4 lanes on SKL
        drm/i915: Handle ENOSPC after failing to insert a mappable node
        drm/i915: Flush GT idle status upon reset
      952b159f
    • Linus Torvalds's avatar
      Merge tag 'devicetree-fixes-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux · d8298d26
      Linus Torvalds authored
      Pull DeviceTree fixes from Rob Herring:
      
       - a couple of DT node ref counting fixes
      
       - fix __unflatten_device_tree for PPC PCI hotplug case
      
       - rework marking irq controllers as OF_POPULATED in cases where real
         driver is used.
      
       - disable of_platform_default_populate_init on PPC.  The change in
         initcall order causes problems which need to be sorted out later.
      
      * tag 'devicetree-fixes-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
        of: fix reference counting in of_graph_get_endpoint_by_regs
        of/platform: disable the of_platform_default_populate_init() for all the ppc boards
        ARM: imx6: mark GPC node as not populated after irq init to probe pm domain driver
        of/irq: Mark interrupt controllers as populated before initialisation
        drivers/of: Validate device node in __unflatten_device_tree()
        of: Delete an unnecessary check before the function call "of_node_put"
      d8298d26
    • Linus Torvalds's avatar
      Merge tag '4.8-doc-fixes' of git://git.lwn.net/linux · 5cae6fe2
      Linus Torvalds authored
      Pull documentation fixes from Jonathan Corbet:
       "Three small fixes for Sphinx-formatted documentation generation"
      
      * tag '4.8-doc-fixes' of git://git.lwn.net/linux:
        doc-rst: customize RTD theme, drop padding of inline literal
        docs: kernel-documentation: remove some highlight directives
        docs: Set the Sphinx default highlight language to "guess"
      5cae6fe2
    • Dave Airlie's avatar
      Merge tag 'drm-intel-fixes-2016-08-15' of git://anongit.freedesktop.org/drm-intel into drm-fixes · 2c24ba21
      Dave Airlie authored
      Collection of i915 fixes.
      
      * tag 'drm-intel-fixes-2016-08-15' of git://anongit.freedesktop.org/drm-intel:
        drm/i915: Fix modeset handling during gpu reset, v5.
        drm/i915: fix aliasing_ppgtt leak
        drm/i915: fix WaInsertDummyPushConstPs
        drm/i915: Fix iboost setting for SKL Y/U DP DDI buffer translation entry 2
        drm/i915/gen9: Give one extra block per line for SKL plane WM calculations
        drm/i915: Acquire audio powerwell for HD-Audio registers
        drm/i915: Add missing rpm wakelock to GGTT pread
        drm/i915/fbc: FBC causes display flicker when VT-d is enabled on Skylake
        drm/i915: Clean up the extra RPM ref on CHV with i915.enable_rc6=0
        drm/i915: Program iboost settings for HDMI/DVI on SKL
        drm/i915: Fix iboost setting for DDI with 4 lanes on SKL
        drm/i915: Handle ENOSPC after failing to insert a mappable node
        drm/i915: Flush GT idle status upon reset
      2c24ba21
    • Dave Airlie's avatar
      Merge branch 'drm-etnaviv-fixes' of git://git.pengutronix.de/git/lst/linux into drm-fixes · aae2d1fc
      Dave Airlie authored
      Single GPU recovery fix
      * 'drm-etnaviv-fixes' of git://git.pengutronix.de/git/lst/linux:
        drm/etnaviv: take GPU lock later in the submit process
      aae2d1fc
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 3408fef7
      Linus Torvalds authored
      Pull x86 fixes from Ingo Molnar:
       "An initrd microcode loading fix, and an SMP bootup topology setup fix
        to resolve crashes on SGI/UV systems if the BIOS is configured in a
        certain way"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/smp: Fix __max_logical_packages value setup
        x86/microcode/AMD: Fix initrd loading with CONFIG_RANDOMIZE_MEMORY=y
      3408fef7
    • Linus Torvalds's avatar
      Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · b061b4f3
      Linus Torvalds authored
      Pull timer fixes from Ingo Molnar:
       "Three clocksource driver fixes"
      
      * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        clocksource/drivers/mips-gic-timer: Make gic_clocksource_of_init() return int
        clocksource/drivers/kona: Fix get_counter() error handling
        clocksource/drivers/time-armada-370-xp: Fix the clock reference
      b061b4f3
    • Linus Torvalds's avatar
      Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · ac78bc71
      Linus Torvalds authored
      Pull scheduler fixes from Ingo Molnar:
       "Two cputime fixes - hopefully the last ones"
      
      * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/cputime: Resync steal time when guest & host lose sync
        sched/cputime: Fix NO_HZ_FULL getrusage() monotonicity regression
      ac78bc71
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 0dcb7b6f
      Linus Torvalds authored
      Pull perf fixes from Ingo Molnar:
       "Mostly tooling fixes, but also start/stop filter related fixes, a perf
        event read() fix, a fix uncovered by fuzzing, and an uprobes leak fix"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/core: Check return value of the perf_event_read() IPI
        perf/core: Enable mapping of the stop filters
        perf/core: Update filters only on executable mmap
        perf/core: Fix file name handling for start/stop filters
        perf/core: Fix event_function_local()
        uprobes: Fix the memcg accounting
        perf intel-pt: Fix occasional decoding errors when tracing system-wide
        tools: Sync kvm related header files for arm64 and s390
        perf probe: Release resources on error when handling exit paths
        perf probe: Check for dup and fdopen failures
        perf symbols: Fix annotation of objects with debuginfo files
        perf script: Don't disable use_callchain if input is pipe
        perf script: Show proper message when failed list scripts
        perf jitdump: Add the right header to get the major()/minor() definitions
        perf ppc64le: Fix build failure when libelf is not present
        perf tools mem: Fix -t store option for record command
        perf intel-pt: Fix ip compression
      0dcb7b6f
    • Linus Torvalds's avatar
      Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · bd3fd451
      Linus Torvalds authored
      Pull locking fixes from Ingo Molnar:
       "Two lockless_dereference() related fixes"
      
      * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        locking/barriers: Suppress sparse warnings in lockless_dereference()
        Revert "drm/fb-helper: Reduce READ_ONCE(master) to lockless_dereference"
      bd3fd451
    • Linus Torvalds's avatar
      Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · f28535c1
      Linus Torvalds authored
      Pull arm64 fixes from Catalin Marinas:
      
       - Avoid a literal load with the MMU off on the CPU resume path
         (potential inconsistency between cache and RAM)
      
       - Build error with CONFIG_ACPI=n fixed
      
       - Compiler warning in the arch/arm64/mm/dump.c code fixed
      
      * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
        arm64: Fix shift warning in arch/arm64/mm/dump.c
        arm64: kernel: avoid literal load of virtual address with MMU off
        arm64: Fix NUMA build error when !CONFIG_ACPI
      f28535c1
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm · 114e3bae
      Linus Torvalds authored
      Pull ARM fixes from Russell King:
       "Only three fixes this time:
      
         - Emil found an overflow problem with the memory layout sanity check.
      
         - Ard Biesheuvel noticed that late-allocated page tables (for EFI)
           weren't being properly constructed.
      
         - Guenter Roeck reported a problem found on qemu caused by the recent
           addr_limit changes"
      
      * 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
        ARM: fix address limit restoration for undefined instructions
        ARM: 8591/1: mm: use fully constructed struct pages for EFI pgd allocations
        ARM: 8590/1: sanity_check_meminfo(): avoid overflow on vmalloc_limit
      114e3bae
    • Linus Torvalds's avatar
      Merge tag 'pm-4.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 395c4342
      Linus Torvalds authored
      Pull power management fixes from Rafael Wysocki:
       "More hibernation-related material: one fix for a recent regression in
        the core, one small cleanup of the x86-64 resume code and a
        documentation update.
      
        Specifics:
      
         - Fix a hibernate core regression resulting from uncovering a latent
           bug in its implementation of memory bitmaps by a recent commit
           (James Morse).
      
         - Use __pa() to compute a physical address in the x86-64 code
           finalizing resume from hibernation (Rafael Wysocki).
      
         - Update power management documentation related to system sleep
           states to remove outdated information from it and to add a
           description of a recently introduced hibernation debug feature to
           it (Rafael Wysocki)"
      
      * tag 'pm-4.8-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        PM / hibernate: Fix rtree_next_node() to avoid walking off list ends
        x86/power/64: Use __pa() for physical address computation
        PM / sleep: Update some system sleep documentation
      395c4342
    • Linus Torvalds's avatar
      Merge tag 'drm-fixes-for-4.8-rc3' of git://people.freedesktop.org/~airlied/linux · 76dcd939
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "Pretty quiet so far:
      
         - a few amdgpu/radeon fixup for pcie pm changes
         - a couple of amdgpu fixes
         - some build fixes
         - printk fix"
      
      * tag 'drm-fixes-for-4.8-rc3' of git://people.freedesktop.org/~airlied/linux:
        drm/amdgpu: Change GART offset to 64-bit
        drm/mediatek: add ARM_SMCCC dependency
        drm/mediatek: add CONFIG_OF dependency
        drm/mediatek: add COMMON_CLK dependency
        drm/amdgpu: Fix memory trashing if UVD ring test fails
        drm/amdgpu: fix vm init error path
        drm/amdkfd: print doorbell offset as a hex value
        Revert "drm/radeon: work around lack of upstream ACPI support for D3cold"
        Revert "drm/amdgpu: work around lack of upstream ACPI support for D3cold"
      76dcd939
    • Johannes Berg's avatar
      locking/barriers: Suppress sparse warnings in lockless_dereference() · 112dc0c8
      Johannes Berg authored
      After Peter's commit:
      
        331b6d8c ("locking/barriers: Validate lockless_dereference() is used on a pointer type")
      
      ... we get a lot of sparse warnings (one for every rcu_dereference, and more)
      since the expression here is assigning to the wrong address space.
      
      Instead of validating that 'p' is a pointer this way, instead make
      it fail compilation when it's not by using sizeof(*(p)). This will
      not cause any sparse warnings (tested, likely since the address
      space is irrelevant for sizeof), and will fail compilation when
      'p' isn't a pointer type.
      Tested-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Chris Wilson <chris@chris-wilson.co.uk>
      Cc: Daniel Vetter <daniel.vetter@intel.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Fixes: 331b6d8c ("locking/barriers: Validate lockless_dereference() is used on a pointer type")
      Link: http://lkml.kernel.org/r/1470909022-687-2-git-send-email-johannes@sipsolutions.netSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      112dc0c8
    • Johannes Berg's avatar
      Revert "drm/fb-helper: Reduce READ_ONCE(master) to lockless_dereference" · f17b3ea3
      Johannes Berg authored
      This reverts commit:
      
        fa7d81bb ("drm/fb-helper: Reduce READ_ONCE(master) to lockless_dereference")
      
      As Peter explained:
      
        [...] lockless_dereference() is _stronger_ than READ_ONCE(), not weaker.
      
        [...]
      
        Also, clue is in the name: 'dereference', you don't actually dereference
        the pointer here, only load it.
      
      My next patch breaks the compile without this revert, because it assumes
      you want to deference and thus also need the struct type visible (which
      it isn't here), so revert it.
      Tested-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Chris Wilson <chris@chris-wilson.co.uk>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Link: http://lkml.kernel.org/r/1470909022-687-1-git-send-email-johannes@sipsolutions.netSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      f17b3ea3
    • Catalin Marinas's avatar
      arm64: Fix shift warning in arch/arm64/mm/dump.c · a93a4d62
      Catalin Marinas authored
      When building with 48-bit VAs and 16K page configuration, it's possible
      to get the following warning when building the arm64 page table dumping
      code:
      
      arch/arm64/mm/dump.c: In function ‘walk_pud’:
      arch/arm64/mm/dump.c:274:102: warning: right shift count >= width of type [-Wshift-count-overflow]
      
      This is because pud_offset(pgd, 0) performs a shift to the right by 36
      while the value 0 has the type 'int' by default, therefore 32-bit.
      
      This patch modifies all the p*_offset() uses in arch/arm64/mm/dump.c to
      use 0UL for the address argument.
      Acked-by: default avatarMark Rutland <mark.rutland@arm.com>
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      a93a4d62
    • Wanpeng Li's avatar
      sched/cputime: Resync steal time when guest & host lose sync · 03cbc732
      Wanpeng Li authored
      Commit:
      
        57430218 ("sched/cputime: Count actually elapsed irq & softirq time")
      
      ... fixed a bug but also triggered a regression:
      
      On an i5 laptop, 4 pCPUs, 4vCPUs for one full dynticks guest, there are four
      CPU hog processes(for loop) running in the guest, I hot-unplug the pCPUs
      on host one by one until there is only one left, then observe CPU utilization
      via 'top' in the guest, it shows:
      
        100% st for cpu0(housekeeping)
         75% st for other CPUs (nohz full mode)
      
      However, w/o this commit it shows the correct 75% for all four CPUs.
      
      When a guest is interrupted for a longer amount of time, missed clock ticks
      are not redelivered later. Because of that, we should not limit the amount
      of steal time accounted to the amount of time that the calling functions
      think have passed.
      
      However, the interval returned by account_other_time() is NOT rounded down
      to the nearest jiffy, while the base interval in get_vtime_delta() it is
      subtracted from is, so the max cputime limit is required to avoid underflow.
      
      This patch fixes the regression by limiting the account_other_time() from
      get_vtime_delta() to avoid underflow, and lets the other three call sites
      (in account_other_time() and steal_account_process_time()) account however
      much steal time the host told us elapsed.
      Suggested-by: default avatarRik van Riel <riel@redhat.com>
      Suggested-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      Signed-off-by: default avatarWanpeng Li <wanpeng.li@hotmail.com>
      Reviewed-by: default avatarRik van Riel <riel@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Radim Krcmar <rkrcmar@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: kvm@vger.kernel.org
      Link: http://lkml.kernel.org/r/1471399546-4069-1-git-send-email-wanpeng.li@hotmail.com
      [ Improved the changelog. ]
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      03cbc732
    • Peter Zijlstra's avatar
      sched/cputime: Fix NO_HZ_FULL getrusage() monotonicity regression · 173be9a1
      Peter Zijlstra authored
      Mike reports:
      
       Roughly 10% of the time, ltp testcase getrusage04 fails:
       getrusage04    0  TINFO  :  Expected timers granularity is 4000 us
       getrusage04    0  TINFO  :  Using 1 as multiply factor for max [us]time increment (1000+4000us)!
       getrusage04    0  TINFO  :  utime:           0us; stime:         179us
       getrusage04    0  TINFO  :  utime:        3751us; stime:           0us
       getrusage04    1  TFAIL  :  getrusage04.c:133: stime increased > 5000us:
      
      And tracked it down to the case where the task simply doesn't get
      _any_ [us]time ticks.
      
      Update the code to assume all rtime is utime when we lack information,
      thus ensuring a task that elides the tick gets time accounted.
      Reported-by: default avatarMike Galbraith <umgwanakikbuti@gmail.com>
      Tested-by: default avatarMike Galbraith <umgwanakikbuti@gmail.com>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Fredrik Markstrom <fredrik.markstrom@gmail.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Radim <rkrcmar@redhat.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Cc: Wanpeng Li <wanpeng.li@hotmail.com>
      Cc: stable@vger.kernel.org # 4.3+
      Fixes: 9d7fb042 ("sched/cputime: Guarantee stime + utime == rtime")
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      173be9a1
    • David Carrillo-Cisneros's avatar
      perf/core: Check return value of the perf_event_read() IPI · 71e7bc2b
      David Carrillo-Cisneros authored
      The call to smp_call_function_single in perf_event_read() may fail if
      an invalid or not online CPU index is passed. Warn user if such bug is
      present and return error.
      Signed-off-by: default avatarDavid Carrillo-Cisneros <davidcc@google.com>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Kan Liang <kan.liang@intel.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Paul Turner <pjt@google.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vegard Nossum <vegard.nossum@gmail.com>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Link: http://lkml.kernel.org/r/1471467307-61171-2-git-send-email-davidcc@google.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      71e7bc2b
    • Mathieu Poirier's avatar
      perf/core: Enable mapping of the stop filters · 99f5bc9b
      Mathieu Poirier authored
      At this time the perf_addr_filter_needs_mmap() function will _not_
      return true on a user space 'stop' filter.  But stop filters need
      exactly the same kind of mapping that range and start filters get.
      Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Acked-by: default avatarAlexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Link: http://lkml.kernel.org/r/1468860187-318-4-git-send-email-mathieu.poirier@linaro.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      99f5bc9b
    • Mathieu Poirier's avatar
      perf/core: Update filters only on executable mmap · 12b40a23
      Mathieu Poirier authored
      Function perf_event_mmap() is called by the MM subsystem each time
      part of a binary is loaded in memory.  There can be several mapping
      for a binary, many times unrelated to the code section.
      
      Each time a section of a binary is mapped address filters are
      updated, event when the map doesn't pertain to the code section.
      The end result is that filters are configured based on the last map
      event that was received rather than the last mapping of the code
      segment.
      
      For example if we have an executable 'main' that calls library
      'libcstest.so.1.0', and that we want to collect traces on code
      that is in that library.  The perf cmd line for this scenario
      would be:
      
        perf record -e cs_etm// --filter 'filter 0x72c/0x40@/opt/lib/libcstest.so.1.0' --per-thread ./main
      
      Resulting in binaries being mapped this way:
      
        root@linaro-nano:~# cat /proc/1950/maps
        00400000-00401000 r-xp 00000000 08:02 33169     /home/linaro/main
        00410000-00411000 r--p 00000000 08:02 33169     /home/linaro/main
        00411000-00412000 rw-p 00001000 08:02 33169     /home/linaro/main
        7fa2464000-7fa2474000 rw-p 00000000 00:00 0
        7fa2474000-7fa25a4000 r-xp 00000000 08:02 543   /lib/aarch64-linux-gnu/libc-2.21.so
        7fa25a4000-7fa25b3000 ---p 00130000 08:02 543   /lib/aarch64-linux-gnu/libc-2.21.so
        7fa25b3000-7fa25b7000 r--p 0012f000 08:02 543   /lib/aarch64-linux-gnu/libc-2.21.so
        7fa25b7000-7fa25b9000 rw-p 00133000 08:02 543   /lib/aarch64-linux-gnu/libc-2.21.so
        7fa25b9000-7fa25bd000 rw-p 00000000 00:00 0
        7fa25bd000-7fa25be000 r-xp 00000000 08:02 38308 /opt/lib/libcstest.so.1.0
        7fa25be000-7fa25cd000 ---p 00001000 08:02 38308 /opt/lib/libcstest.so.1.0
        7fa25cd000-7fa25ce000 r--p 00000000 08:02 38308 /opt/lib/libcstest.so.1.0
        7fa25ce000-7fa25cf000 rw-p 00001000 08:02 38308 /opt/lib/libcstest.so.1.0
        7fa25cf000-7fa25eb000 r-xp 00000000 08:02 574   /lib/aarch64-linux-gnu/ld-2.21.so
        7fa25ef000-7fa25f2000 rw-p 00000000 00:00 0
        7fa25f7000-7fa25f9000 rw-p 00000000 00:00 0
        7fa25f9000-7fa25fa000 r--p 00000000 00:00 0     [vvar]
        7fa25fa000-7fa25fb000 r-xp 00000000 00:00 0     [vdso]
        7fa25fb000-7fa25fc000 r--p 0001c000 08:02 574   /lib/aarch64-linux-gnu/ld-2.21.so
        7fa25fc000-7fa25fe000 rw-p 0001d000 08:02 574   /lib/aarch64-linux-gnu/ld-2.21.so
        7ff2ea8000-7ff2ec9000 rw-p 00000000 00:00 0     [stack]
        root@linaro-nano:~#
      
      Before 'main()' can execute 'libcstest.so.1.0' has to be loaded in
      memory.  Once that has been done perf_event_mmap() has been called
      4 times, with the last map starting at address 0x7fa25ce000 and
      the address filter configured to start filtering when the
      IP has passed over address 0x0x7fa25ce72c (0x7fa25ce000 + 0x72c).
      
      But that is wrong since the code segment for library 'libcstest.so.1.0'
      as been mapped at 0x7fa25bd000, resulting in traces not being
      collected.
      
      This patch corrects the situation by requesting that address
      filters be updated only if the mapped event is for a code
      segment.
      Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Acked-by: default avatarAlexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Link: http://lkml.kernel.org/r/1468860187-318-3-git-send-email-mathieu.poirier@linaro.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      12b40a23
    • Mathieu Poirier's avatar
      perf/core: Fix file name handling for start/stop filters · 4059ffd0
      Mathieu Poirier authored
      Binary file names have to be supplied for both range and start/stop
      filters but the current code only processes the filename if an
      address range filter is specified.  This code adds processing of
      the filename for start/stop filters.
      Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Acked-by: default avatarAlexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Vince Weaver <vincent.weaver@maine.edu>
      Link: http://lkml.kernel.org/r/1468860187-318-2-git-send-email-mathieu.poirier@linaro.orgSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      4059ffd0
    • Peter Zijlstra's avatar
      perf/core: Fix event_function_local() · cca20946
      Peter Zijlstra authored
      Vincent reported triggering the WARN_ON_ONCE() in event_function_local().
      
      While thinking through cases I noticed that by using event_function()
      directly, we miss the inactive case usually handled by
      event_function_call().
      
      Therefore construct a blend of event_function_call() and
      event_function() that handles the cases relevant to
      event_function_local().
      Reported-by: default avatarVince Weaver <vincent.weaver@maine.edu>
      Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
      Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: stable@vger.kernel.org # 4.5+
      Fixes: fae3fde6 ("perf: Collapse and fix event_function_call() users")
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      cca20946