1. 19 Nov, 2014 2 commits
    • Steven Rostedt (Red Hat)'s avatar
      ftrace/x86: Add frames pointers to trampoline as necessary · 9960efeb
      Steven Rostedt (Red Hat) authored
      When CONFIG_FRAME_POINTERS are enabled, it is required that the
      ftrace_caller and ftrace_regs_caller trampolines set up frame pointers
      otherwise a stack trace from a function call wont print the functions
      that called the trampoline. This is due to a check in
      __save_stack_address():
      
       #ifdef CONFIG_FRAME_POINTER
      	if (!reliable)
      		return;
       #endif
      
      The "reliable" variable is only set if the function address is equal to
      contents of the address before the address the frame pointer register
      points to. If the frame pointer is not set up for the ftrace caller
      then this will fail the reliable test. It will miss the function that
      called the trampoline. Worse yet, if fentry is used (gcc 4.6 and
      beyond), it will also miss the parent, as the fentry is called before
      the stack frame is set up. That means the bp frame pointer points
      to the stack of just before the parent function was called.
      
      Link: http://lkml.kernel.org/r/20141119034829.355440340@goodmis.org
      
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: x86@kernel.org
      Cc: stable@vger.kernel.org # 3.7+
      Acked-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      9960efeb
    • Steven Rostedt (Red Hat)'s avatar
      tracing: Fix race of function probes counting · a9ce7c36
      Steven Rostedt (Red Hat) authored
      The function probe counting for traceon and traceoff suffered a race
      condition where if the probe was executing on two or more CPUs at the
      same time, it could decrement the counter by more than one when
      disabling (or enabling) the tracer only once.
      
      The way the traceon and traceoff probes are suppose to work is that
      they disable (or enable) tracing once per count. If a user were to
      echo 'schedule:traceoff:3' into set_ftrace_filter, then when the
      schedule function was called, it would disable tracing. But the count
      should only be decremented once (to 2). Then if the user enabled tracing
      again (via tracing_on file), the next call to schedule would disable
      tracing again and the count would be decremented to 1.
      
      But if multiple CPUS called schedule at the same time, it is possible
      that the count would be decremented more than once because of the
      simple "count--" used.
      
      By reading the count into a local variable and using memory barriers
      we can guarantee that the count would only be decremented once per
      disable (or enable).
      
      The stack trace probe had a similar race, but here the stack trace will
      decrement for each time it is called. But this had the read-modify-
      write race, where it could stack trace more than the number of times
      that was specified. This case we use a cmpxchg to stack trace only the
      number of times specified.
      
      The dump probes can still use the old "update_count()" function as
      they only run once, and that is controlled by the dump logic
      itself.
      
      Link: http://lkml.kernel.org/r/20141118134643.4b550ee4@gandalf.local.homeSigned-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      a9ce7c36
  2. 14 Nov, 2014 9 commits
  3. 11 Nov, 2014 6 commits
  4. 31 Oct, 2014 2 commits
    • Steven Rostedt (Red Hat)'s avatar
      ftrace/x86: Show trampoline call function in enabled_functions · 15d5b02c
      Steven Rostedt (Red Hat) authored
      The file /sys/kernel/debug/tracing/eneabled_functions is used to debug
      ftrace function hooks. Add to the output what function is being called
      by the trampoline if the arch supports it.
      
      Add support for this feature in x86_64.
      
      Cc: H. Peter Anvin <hpa@linux.intel.com>
      Tested-by: default avatarMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Tested-by: default avatarJiri Kosina <jkosina@suse.cz>
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      15d5b02c
    • Steven Rostedt (Red Hat)'s avatar
      ftrace/x86: Add dynamic allocated trampoline for ftrace_ops · f3bea491
      Steven Rostedt (Red Hat) authored
      The current method of handling multiple function callbacks is to register
      a list function callback that calls all the other callbacks based on
      their hash tables and compare it to the function that the callback was
      called on. But this is very inefficient.
      
      For example, if you are tracing all functions in the kernel and then
      add a kprobe to a function such that the kprobe uses ftrace, the
      mcount trampoline will switch from calling the function trace callback
      to calling the list callback that will iterate over all registered
      ftrace_ops (in this case, the function tracer and the kprobes callback).
      That means for every function being traced it checks the hash of the
      ftrace_ops for function tracing and kprobes, even though the kprobes
      is only set at a single function. The kprobes ftrace_ops is checked
      for every function being traced!
      
      Instead of calling the list function for functions that are only being
      traced by a single callback, we can call a dynamically allocated
      trampoline that calls the callback directly. The function graph tracer
      already uses a direct call trampoline when it is being traced by itself
      but it is not dynamically allocated. It's trampoline is static in the
      kernel core. The infrastructure that called the function graph trampoline
      can also be used to call a dynamically allocated one.
      
      For now, only ftrace_ops that are not dynamically allocated can have
      a trampoline. That is, users such as function tracer or stack tracer.
      kprobes and perf allocate their ftrace_ops, and until there's a safe
      way to free the trampoline, it can not be used. The dynamically allocated
      ftrace_ops may, although, use the trampoline if the kernel is not
      compiled with CONFIG_PREEMPT. But that will come later.
      Tested-by: default avatarMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Tested-by: default avatarJiri Kosina <jkosina@suse.cz>
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      f3bea491
  5. 24 Oct, 2014 2 commits
    • Steven Rostedt (Red Hat)'s avatar
      ftrace: Fix checking of trampoline ftrace_ops in finding trampoline · 4fc40904
      Steven Rostedt (Red Hat) authored
      When modifying code, ftrace has several checks to make sure things
      are being done correctly. One of them is to make sure any code it
      modifies is exactly what it expects it to be before it modifies it.
      In order to do so with the new trampoline logic, it must be able
      to find out what trampoline a function is hooked to in order to
      see if the code that hooks to it is what's expected.
      
      The logic to find the trampoline from a record (accounting descriptor
      for a function that is hooked) needs to only look at the "old_hash"
      of an ops that is being modified. The old_hash is the list of function
      an ops is hooked to before its update. Since a record would only be
      pointing to an ops that is being modified if it was already hooked
      before.
      
      Currently, it can pick a modified ops based on its new functions it
      will be hooked to, and this picks the wrong trampoline and causes
      the check to fail, disabling ftrace.
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      
      ftrace: squash into ordering of ops for modification
      4fc40904
    • Steven Rostedt (Red Hat)'s avatar
      ftrace: Set ops->old_hash on modifying what an ops hooks to · 8252ecf3
      Steven Rostedt (Red Hat) authored
      The code that checks for trampolines when modifying function hooks
      tests against a modified ops "old_hash". But the ops old_hash pointer
      is not being updated before the changes are made, making it possible
      to not find the right hash to the callback and possibly causing
      ftrace to break in accounting and disable itself.
      
      Have the ops set its old_hash before the modifying takes place.
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      8252ecf3
  6. 20 Oct, 2014 2 commits
    • Linus Torvalds's avatar
      Linux 3.18-rc1 · f114040e
      Linus Torvalds authored
      f114040e
    • Linus Torvalds's avatar
      Merge tag 'arm-soc-fixes-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · 4d3639ac
      Linus Torvalds authored
      Pull ARM SoC fixes from Olof Johansson:
       "A batch of fixes that have come in during the merge window.
      
        Some of them are defconfig updates for things that have now landed,
        some errata additions and a few general scattered fixes.
      
        There's also a qcom DT update that adds support for SATA on AP148, and
        basic support for Sony Xperia Z1 and CM-QS600 platforms that seemed
        isolated enough that we could merge it even if it's late"
      
      * tag 'arm-soc-fixes-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
        MAINTAINERS: corrected bcm2835 search
        ARM: dts: Explicitly set dr_mode on exynos5420-arndale-octa
        ARM: dts: Explicitly set dr_mode on exynos Peach boards
        ARM: dts: qcom: add CM-QS600 board
        ARM: dts: qcom: Add initial DTS file for Sony Xperia Z1 phone
        ARM: dts: qcom: Add SATA support on IPQ8064/AP148
        MAINTAINERS: Update Santosh Shilimkar's email id
        ARM: sunxi_defconfig: enable CONFIG_REGULATOR
        ARM: dts: Disable smc91x on n900 until bootloader dependency is removed
        ARM: omap2plus_defconfig: Enable ARM erratum 430973 for omap3
        ARM: exynos_defconfig: enable USB gadget support
        ARM: exynos_defconfig: Enable Maxim 77693 and I2C GPIO drivers
        ARM: mm: Fix ifdef around cpu_*_do_[suspend, resume] ops
        ARM: EXYNOS: Fix build with PM_SLEEP=n and ARM_EXYNOS_CPUIDLE=n
        ARM: SAMSUNG: Restore Samsung PM Debug functionality
        ARM: dts: Fix pull setting in sd4_width8 pin group for exynos4x12
        ARM: exynos_defconfig: Enable SBS battery support
        ARM: exynos_defconfig: Enable Control Groups support
        ARM: exynos_defconfig: Enable Atmel maXTouch support
        ARM: exynos_defconfig: Enable MAX77802
      4d3639ac
  7. 19 Oct, 2014 17 commits
    • Linus Torvalds's avatar
      Merge git://git.infradead.org/users/eparis/audit · ab074ade
      Linus Torvalds authored
      Pull audit updates from Eric Paris:
       "So this change across a whole bunch of arches really solves one basic
        problem.  We want to audit when seccomp is killing a process.  seccomp
        hooks in before the audit syscall entry code.  audit_syscall_entry
        took as an argument the arch of the given syscall.  Since the arch is
        part of what makes a syscall number meaningful it's an important part
        of the record, but it isn't available when seccomp shoots the
        syscall...
      
        For most arch's we have a better way to get the arch (syscall_get_arch)
        So the solution was two fold: Implement syscall_get_arch() everywhere
        there is audit which didn't have it.  Use syscall_get_arch() in the
        seccomp audit code.  Having syscall_get_arch() everywhere meant it was
        a useless flag on the stack and we could get rid of it for the typical
        syscall entry.
      
        The other changes inside the audit system aren't grand, fixed some
        records that had invalid spaces.  Better locking around the task comm
        field.  Removing some dead functions and structs.  Make some things
        static.  Really minor stuff"
      
      * git://git.infradead.org/users/eparis/audit: (31 commits)
        audit: rename audit_log_remove_rule to disambiguate for trees
        audit: cull redundancy in audit_rule_change
        audit: WARN if audit_rule_change called illegally
        audit: put rule existence check in canonical order
        next: openrisc: Fix build
        audit: get comm using lock to avoid race in string printing
        audit: remove open_arg() function that is never used
        audit: correct AUDIT_GET_FEATURE return message type
        audit: set nlmsg_len for multicast messages.
        audit: use union for audit_field values since they are mutually exclusive
        audit: invalid op= values for rules
        audit: use atomic_t to simplify audit_serial()
        kernel/audit.c: use ARRAY_SIZE instead of sizeof/sizeof[0]
        audit: reduce scope of audit_log_fcaps
        audit: reduce scope of audit_net_id
        audit: arm64: Remove the audit arch argument to audit_syscall_entry
        arm64: audit: Add audit hook in syscall_trace_enter/exit()
        audit: x86: drop arch from __audit_syscall_entry() interface
        sparc: implement is_32bit_task
        sparc: properly conditionalize use of TIF_32BIT
        ...
      ab074ade
    • Olof Johansson's avatar
      Merge tag 'qcom-dt-for-3.18-3' of... · 57764512
      Olof Johansson authored
      Merge tag 'qcom-dt-for-3.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/linux-qcom into fixes
      
      Merge "qcom DT changes for v3.18-3" from Kumar Gala:
      
      Qualcomm ARM Based Device Tree Updates for v3.18-3
      
      * Added Board support for CM-QS600 and Sony Xperia Z1 phone
      * Added SATA support on IPQ8064/AP148
      
      * tag 'qcom-dt-for-3.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/linux-qcom:
        ARM: dts: qcom: add CM-QS600 board
        ARM: dts: qcom: Add initial DTS file for Sony Xperia Z1 phone
        ARM: dts: qcom: Add SATA support on IPQ8064/AP148
      57764512
    • Olof Johansson's avatar
      Merge tag 'samsung-fixes-2' of... · e29c6486
      Olof Johansson authored
      Merge tag 'samsung-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes
      
      Pull more fixes from Kukjin Kim:
      
      2nd Samsung fixes for v3.18
      - Explicitly set dr_mode on exynos5800-peach-pi, exynos5420-peach-pit
        and exynos5420-arndale-octa boards, because the USB dwc3 controller
        will not work properly without dr_mode as host on above boards if
        the USB host and gadget are enabled in kernel configuration both.
      
      * tag 'samsung-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
        ARM: dts: Explicitly set dr_mode on exynos5420-arndale-octa
        ARM: dts: Explicitly set dr_mode on exynos Peach boards
      Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
      e29c6486
    • Scott Branden's avatar
      MAINTAINERS: corrected bcm2835 search · 9209bec4
      Scott Branden authored
      Corrected bcm2835 maintainer info by using N: to specify any files with
      bcm2835 in are directed to the proper maintainer.
      Also corrected minor mispelling of ARCHITECTURE in 2 comment locations.
      Signed-off-by: default avatarScott Branden <sbranden@broadcom.com>
      Signed-off-by: default avatarStephen Warren <swarren@wwwdotorg.org>
      Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
      9209bec4
    • Linus Torvalds's avatar
      Merge tag 'ntb-3.18' of git://github.com/jonmason/ntb · 61ed53de
      Linus Torvalds authored
      Pull ntb (non-transparent bridge) updates from Jon Mason:
       "Add support for Haswell NTB split BARs, a debugfs entry for basic
        debugging info, and some code clean-ups"
      
      * tag 'ntb-3.18' of git://github.com/jonmason/ntb:
        ntb: Adding split BAR support for Haswell platforms
        ntb: use errata flag set via DID to implement workaround
        ntb: conslidate reading of PPD to move platform detection earlier
        ntb: move platform detection to separate function
        NTB: debugfs device entry
      61ed53de
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · 278f1d07
      Linus Torvalds authored
      Pull i2c updates from Wolfram Sang:
       "Highlights from the I2C subsystem for 3.18:
      
         - new drivers for Axxia AM55xx, and Hisilicon hix5hd2 SoC.
      
         - designware driver gained AMD support, exynos gained exynos7 support
      
        The rest is usual driver stuff.  Hopefully no lowlights this time"
      
      * 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        i2c: i801: Add Device IDs for Intel Sunrise Point PCH
        i2c: hix5hd2: add i2c controller driver
        i2c-imx: Disable the clock on probe failure
        i2c: designware: Add support for AMD I2C controller
        i2c: designware: Rework probe() to get clock a bit later
        i2c: designware: Default to fast mode in case of ACPI
        i2c: axxia: Add I2C driver for AXM55xx
        i2c: exynos: add support for HSI2C module on Exynos7
        i2c: mxs: detect No Slave Ack on SELECT in PIO mode
        i2c: cros_ec: Remove EC_I2C_FLAG_10BIT
        i2c: cros-ec-tunnel: Add of match table
        i2c: rcar: remove sign-compare flaw
        i2c: ismt: Use minimum descriptor size
        i2c: imx: Add arbitration lost check
        i2c: rk3x: Remove unlikely() annotations
        i2c: rcar: check for no IRQ in rcar_i2c_irq()
        i2c: rcar: make rcar_i2c_prepare_msg() *void*
        i2c: rcar: simplify check for last message
        i2c: designware: add support of platform data to set I2C mode
        i2c: designware: add support of I2C standard mode
      278f1d07
    • Linus Torvalds's avatar
      Merge tag 'sound-fix-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · d590c6cd
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "Here are a collection of small fixes after 3.18 merge.
      
        The urgent one is the fix for kernel panics with linked PCM substream
        triggered by the recent nonatomic PCM ops support.  Other two fixes
        (emu10k1 and bebob) are stable fixes, and one easy PCI ID addition for
        a new Intel HD-audio controller"
      
      * tag 'sound-fix-3.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ALSA: hda_intel: Add Device IDs for Intel Sunrise Point PCH
        ALSA: emu10k1: Fix deadlock in synth voice lookup
        ALSA: pcm: Fix referred substream in snd_pcm_action_group() unlock loop
        ALSA: bebob: Fix failure to detect source of clock for Terratec Phase 88
      d590c6cd
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · fb378df5
      Linus Torvalds authored
      Pull second round of input updates from Dmitry Torokhov:
       "Mostly simple bug fixes, although we do have one brand new driver for
        Microchip AR1021 i2c touchscreen.
      
        Also there is the change to stop trying to use i8042 active
        multiplexing by default (it is still possible to activate it via
        i8042.nomux=0 on boxes that implement it)"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
        Input: xpad - add Thrustmaster as Xbox 360 controller vendor
        Input: xpad - add USB ID for Thrustmaster Ferrari 458 Racing Wheel
        Input: max77693-haptic - fix state check in imax77693_haptic_disable()
        Input: xen-kbdfront - free grant table entry in xenkbd_disconnect_backend
        Input: alps - fix v4 button press recognition
        Input: i8042 - disable active multiplexing by default
        Input: i8042 - add noloop quirk for Asus X750LN
        Input: synaptics - gate forcepad support by DMI check
        Input: Add Microchip AR1021 i2c touchscreen
        Input: cros_ec_keyb - add of match table
        Input: serio - avoid negative serio device numbers
        Input: avoid negative input device numbers
        Input: automatically set EV_ABS bit in input_set_abs_params
        Input: adp5588-keys - cancel workqueue in failure path
        Input: opencores-kbd - switch to using managed resources
        Input: evdev - fix EVIOCG{type} ioctl
      fb378df5
    • Linus Torvalds's avatar
      Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband · 2eb7f910
      Linus Torvalds authored
      Pull infiniband/RDMA updates from Roland Dreier:
       - large set of iSER initiator improvements
       - hardware driver fixes for cxgb4, mlx5 and ocrdma
       - small fixes to core midlayer
      
      * tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (47 commits)
        RDMA/cxgb4: Fix ntuple calculation for ipv6 and remove duplicate line
        RDMA/cxgb4: Add missing neigh_release in find_route
        RDMA/cxgb4: Take IPv6 into account for best_mtu and set_emss
        RDMA/cxgb4: Make c4iw_wr_log_size_order static
        IB/core: Fix XRC race condition in ib_uverbs_open_qp
        IB/core: Clear AH attr variable to prevent garbage data
        RDMA/ocrdma: Save the bit environment, spare unncessary parenthesis
        RDMA/ocrdma: The kernel has a perfectly good BIT() macro - use it
        RDMA/ocrdma: Don't memset() buffers we just allocated with kzalloc()
        RDMA/ocrdma: Remove a unused-label warning
        RDMA/ocrdma: Convert kernel VA to PA for mmap in user
        RDMA/ocrdma: Get vlan tag from ib_qp_attrs
        RDMA/ocrdma: Add default GID at index 0
        IB/mlx5, iser, isert: Add Signature API additions
        Target/iser: Centralize ib_sig_domain setting
        IB/iser: Centralize ib_sig_domain settings
        IB/mlx5: Use extended internal signature layout
        IB/iser: Set IP_CSUM as default guard type
        IB/iser: Remove redundant assignment
        IB/mlx5: Use enumerations for PI copy mask
        ...
      2eb7f910
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 1f6075f9
      Linus Torvalds authored
      Pull more perf updates from Ingo Molnar:
       "A second (and last) round of late coming fixes and changes, almost all
        of them in perf tooling:
      
        User visible tooling changes:
      
         - Add period data column and make it default in 'perf script' (Jiri
           Olsa)
      
         - Add a visual cue for toggle zeroing of samples in 'perf top'
           (Taeung Song)
      
         - Improve callchains when using libunwind (Namhyung Kim)
      
        Tooling fixes and infrastructure changes:
      
         - Fix for double free in 'perf stat' when using some specific invalid
           command line combo (Yasser Shalabi)
      
         - Fix off-by-one bugs in map->end handling (Stephane Eranian)
      
         - Fix off-by-one bug in maps__find(), also related to map->end
           handling (Namhyung Kim)
      
         - Make struct symbol->end be the first addr after the symbol range,
           to make it match the convention used for struct map->end.  (Arnaldo
           Carvalho de Melo)
      
         - Fix perf_evlist__add_pollfd() error handling in 'perf kvm stat
           live' (Jiri Olsa)
      
         - Fix python test build by moving callchain_param to an object linked
           into the python binding (Jiri Olsa)
      
         - Document sysfs events/ interfaces (Cody P Schafer)
      
         - Fix typos in perf/Documentation (Masanari Iida)
      
         - Add missing 'struct option' forward declaration (Arnaldo Carvalho
           de Melo)
      
         - Add option to copy events when queuing for sorting across cpu
           buffers and enable it for 'perf kvm stat live', to avoid having
           events left in the queue pointing to the ring buffer be rewritten
           in high volume sessions.  (Alexander Yarygin, improving work done
           by David Ahern):
      
         - Do not include a struct hists per perf_evsel, untangling the
           histogram code from perf_evsel, to pave the way for exporting a
           minimalistic tools/lib/api/perf/ library usable by tools/perf and
           initially by the rasd daemon being developed by Borislav Petkov,
           Robert Richter and Jean Pihet.  (Arnaldo Carvalho de Melo)
      
         - Make perf_evlist__open(evlist, NULL, NULL), i.e. without cpu and
           thread maps mean syswide monitoring, reducing the boilerplate for
           tools that only want system wide mode.  (Arnaldo Carvalho de Melo)
      
         - Move exit stuff from perf_evsel__delete to perf_evsel__exit, delete
           should be just a front end for exit + free (Arnaldo Carvalho de
           Melo)
      
         - Add support to new style format of kernel PMU event.  (Kan Liang)
      
        and other misc fixes"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (45 commits)
        perf script: Add period as a default output column
        perf script: Add period data column
        perf evsel: No need to drag util/cgroup.h
        perf evlist: Add missing 'struct option' forward declaration
        perf evsel: Move exit stuff from __delete to __exit
        kprobes/x86: Remove stale ARCH_SUPPORTS_KPROBES_ON_FTRACE define
        perf kvm stat live: Enable events copying
        perf session: Add option to copy events when queueing
        perf Documentation: Fix typos in perf/Documentation
        perf trace: Use thread_{,_set}_priv helpers
        perf kvm: Use thread_{,_set}_priv helpers
        perf callchain: Create an address space per thread
        perf report: Set callchain_param.record_mode for future use
        perf evlist: Fix for double free in tools/perf stat
        perf test: Add test case for pmu event new style format
        perf tools: Add support to new style format of kernel PMU event
        perf tools: Parse the pmu event prefix and suffix
        Revert "perf tools: Default to cpu// for events v5"
        perf Documentation: Remove Ruplicated docs for powerpc cpu specific events
        perf Documentation: sysfs events/ interfaces
        ...
      1f6075f9
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · 5e2ee7cd
      Linus Torvalds authored
      Pull sparc fixes from David Miller:
       "Here we have two bug fixes:
      
        1) The current thread's fault_code is not setup properly upon entry to
           do_sparc64_fault() in some paths, leading to spurious SIGBUS.
      
        2) Don't use a zero length array at the end of thread_info on sparc64,
           otherwise end_of_stack() isn't right"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
        sparc64: Do not define thread fpregs save area as zero-length array.
        sparc64: Fix corrupted thread fault code.
      5e2ee7cd
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · e25b4927
      Linus Torvalds authored
      Pull networking fixes from David Miller:
       "A quick batch of bug fixes:
      
        1) Fix build with IPV6 disabled, from Eric Dumazet.
      
        2) Several more cases of caching SKB data pointers across calls to
           pskb_may_pull(), thus referencing potentially free'd memory.  From
           Li RongQing.
      
        3) DSA phy code tests operation presence improperly, instead of going:
      
              if (x->ops->foo)
                      r = x->ops->foo(args);
      
           it was going:
      
              if (x->ops->foo(args))
                      r = x->ops->foo(args);
      
         Fix from Andew Lunn"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
        Net: DSA: Fix checking for get_phy_flags function
        ipv6: fix a potential use after free in sit.c
        ipv6: fix a potential use after free in ip6_offload.c
        ipv4: fix a potential use after free in gre_offload.c
        tcp: fix build error if IPv6 is not enabled
      e25b4927
    • Andrew Lunn's avatar
      Net: DSA: Fix checking for get_phy_flags function · 228b16cb
      Andrew Lunn authored
      The check for the presence or not of the optional switch function
      get_phy_flags() called the function, rather than checked to see if it
      is a NULL pointer. This causes a derefernce of a NULL pointer on all
      switch chips except the sf2, the only switch to implement this call.
      Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
      Fixes: 6819563e ("net: dsa: allow switch drivers to specify phy_device::dev_flags")
      Cc: Florian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      228b16cb
    • David S. Miller's avatar
      sparc64: Do not define thread fpregs save area as zero-length array. · e2653143
      David S. Miller authored
      This breaks the stack end corruption detection facility.
      
      What that facility does it write a magic value to "end_of_stack()"
      and checking to see if it gets overwritten.
      
      "end_of_stack()" is "task_thread_info(p) + 1", which for sparc64 is
      the beginning of the FPU register save area.
      
      So once the user uses the FPU, the magic value is overwritten and the
      debug checks trigger.
      
      Fix this by making the size explicit.
      
      Due to the size we use for the fpsaved[], gsr[], and xfsr[] arrays we
      are limited to 7 levels of FPU state saves.  So each FPU register set
      is 256 bytes, allocate 256 * 7 for the fpregs area.
      Reported-by: default avatarMeelis Roos <mroos@linux.ee>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      e2653143
    • David S. Miller's avatar
      sparc64: Fix corrupted thread fault code. · 84bd6d8b
      David S. Miller authored
      Every path that ends up at do_sparc64_fault() must install a valid
      FAULT_CODE_* bitmask in the per-thread fault code byte.
      
      Two paths leading to the label winfix_trampoline (which expects the
      FAULT_CODE_* mask in register %g4) were not doing so:
      
      1) For pre-hypervisor TLB protection violation traps, if we took
         the 'winfix_trampoline' path we wouldn't have %g4 initialized
         with the FAULT_CODE_* value yet.  Resulting in using the
         TLB_TAG_ACCESS register address value instead.
      
      2) In the TSB miss path, when we notice that we are going to use a
         hugepage mapping, but we haven't allocated the hugepage TSB yet, we
         still have to take the window fixup case into consideration and
         in that particular path we leave %g4 not setup properly.
      
      Errors on this sort were largely invisible previously, but after
      commit 4ccb9272 ("sparc64: sun4v TLB
      error power off events") we now have a fault_code mask bit
      (FAULT_CODE_BAD_RA) that triggers due to this bug.
      
      FAULT_CODE_BAD_RA triggers because this bit is set in TLB_TAG_ACCESS
      (see #1 above) and thus we get seemingly random bus errors triggered
      for user processes.
      
      Fixes: 4ccb9272 ("sparc64: sun4v TLB error power off events")
      Reported-by: default avatarMeelis Roos <mroos@linux.ee>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      84bd6d8b
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma · 52d589a0
      Linus Torvalds authored
      Pull slave-dmaengine updates from Vinod Koul:
       "For dmaengine contributions we have:
         - designware cleanup by Andy
         - my series moving device_control users to dmanegine_xxx APIs for
           later removal of device_control API
         - minor fixes spread over drivers mainly mv_xor, pl330, mmp, imx-sdma
           etc"
      
      * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (60 commits)
        serial: atmel: add missing dmaengine header
        dmaengine: remove FSLDMA_EXTERNAL_START
        dmaengine: freescale: remove FSLDMA_EXTERNAL_START control method
        carma-fpga: move to fsl_dma_external_start()
        carma-fpga: use dmaengine_xxx() API
        dmaengine: freescale: add and export fsl_dma_external_start()
        dmaengine: add dmaengine_prep_dma_sg() helper
        video: mx3fb: use dmaengine_terminate_all() API
        serial: sh-sci: use dmaengine_terminate_all() API
        net: ks8842: use dmaengine_terminate_all() API
        mtd: sh_flctl: use dmaengine_terminate_all() API
        mtd: fsmc_nand: use dmaengine_terminate_all() API
        V4L2: mx3_camer: use dmaengine_pause() API
        dmaengine: coh901318: use dmaengine_terminate_all() API
        pata_arasan_cf: use dmaengine_terminate_all() API
        dmaengine: edma: check for echan->edesc => NULL in edma_dma_pause()
        dmaengine: dw: export probe()/remove() and Co to users
        dmaengine: dw: enable and disable controller when needed
        dmaengine: dw: always export dw_dma_{en,dis}able
        dmaengine: dw: introduce dw_dma_on() helper
        ...
      52d589a0
    • Linus Torvalds's avatar
      Merge tag 'fbdev-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux · 0a582821
      Linus Torvalds authored
      Pull fbdev updates from Tomi Valkeinen:
       - new 6x10 font
       - various small fixes and cleanups
      
      * tag 'fbdev-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (30 commits)
        fonts: Add 6x10 font
        videomode: provide dummy inline functions for !CONFIG_OF
        video/atmel_lcdfb: Introduce regulator support
        fbdev: sh_mobile_hdmi: Re-init regs before irq re-enable on resume
        framebuffer: fix screen corruption when copying
        framebuffer: fix border color
        arm, fbdev, omap2, LLVMLinux: Remove nested function from omapfb
        arm, fbdev, omap2, LLVMLinux: Remove nested function from omap2 dss
        video: fbdev: valkyriefb.c: use container_of to resolve fb_info_valkyrie from fb_info
        video: fbdev: pxafb.c: use container_of to resolve pxafb_info/layer from fb_info
        video: fbdev: cyber2000fb.c: use container_of to resolve cfb_info from fb_info
        video: fbdev: controlfb.c: use container_of to resolve fb_info_control from fb_info
        video: fbdev: sa1100fb.c: use container_of to resolve sa1100fb_info from fb_info
        video: fbdev: stifb.c: use container_of to resolve stifb_info from fb_info
        video: fbdev: sis: sis_main.c: Cleaning up missing null-terminate in conjunction with strncpy
        video: valkyriefb: Fix unused variable warning in set_valkyrie_clock()
        video: fbdev: use %*ph specifier to dump small buffers
        video: mx3fb: always enable BACKLIGHT_LCD_SUPPORT
        video: fbdev: au1200fb: delete double assignment
        video: fbdev: sis: delete double assignment
        ...
      0a582821