02 Nov, 2017

1 commit

  • Many source files in the tree are missing licensing information, which
    makes it harder for compliance tools to determine the correct license.

    By default all files without license information are under the default
    license of the kernel, which is GPL version 2.

    Update the files which contain no license information with the 'GPL-2.0'
    SPDX license identifier. The SPDX identifier is a legally binding
    shorthand, which can be used instead of the full boiler plate text.

    This patch is based on work done by Thomas Gleixner and Kate Stewart and
    Philippe Ombredanne.

    How this work was done:

    Patches were generated and checked against linux-4.14-rc6 for a subset of
    the use cases:
    - file had no licensing information it it.
    - file was a */uapi/* one with no licensing information in it,
    - file was a */uapi/* one with existing licensing information,

    Further patches will be generated in subsequent months to fix up cases
    where non-standard license headers were used, and references to license
    had to be inferred by heuristics based on keywords.

    The analysis to determine which SPDX License Identifier to be applied to
    a file was done in a spreadsheet of side by side results from of the
    output of two independent scanners (ScanCode & Windriver) producing SPDX
    tag:value files created by Philippe Ombredanne. Philippe prepared the
    base worksheet, and did an initial spot review of a few 1000 files.

    The 4.13 kernel was the starting point of the analysis with 60,537 files
    assessed. Kate Stewart did a file by file comparison of the scanner
    results in the spreadsheet to determine which SPDX license identifier(s)
    to be applied to the file. She confirmed any determination that was not
    immediately clear with lawyers working with the Linux Foundation.

    Criteria used to select files for SPDX license identifier tagging was:
    - Files considered eligible had to be source code files.
    - Make and config files were included as candidates if they contained >5
    lines of source
    - File already had some variant of a license header in it (even if
    Reviewed-by: Philippe Ombredanne
    Reviewed-by: Thomas Gleixner
    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman
     

23 Sep, 2017

1 commit


13 Jul, 2017

1 commit

  • For architectures that define HAVE_NMI_WATCHDOG, instead of having them
    provide the complete touch_nmi_watchdog() function, just have them
    provide arch_touch_nmi_watchdog().

    This gives the generic code more flexibility in implementing this
    function, and arch implementations don't miss out on touching the
    softlockup watchdog or other generic details.

    Link: http://lkml.kernel.org/r/20170616065715.18390-3-npiggin@gmail.com
    Signed-off-by: Nicholas Piggin
    Reviewed-by: Don Zickus
    Reviewed-by: Babu Moger
    Tested-by: Babu Moger [sparc]
    Cc: Benjamin Herrenschmidt
    Cc: Paul Mackerras
    Cc: Michael Ellerman
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Nicholas Piggin
     

07 Jul, 2017

1 commit


29 Jun, 2017

1 commit

  • The only user of thread_saved_pc() in non-arch-specific code was removed
    in commit 8243d5597793 ("sched/core: Remove pointless printout in
    sched_show_task()"). Remove the implementations as well.

    Some architectures use thread_saved_pc() in their arch-specific code.
    Leave their thread_saved_pc() intact.

    Signed-off-by: Tobias Klauser
    Acked-by: Geert Uytterhoeven
    Cc: Ingo Molnar
    Signed-off-by: Linus Torvalds

    Tobias Klauser
     

16 May, 2017

1 commit


02 May, 2017

1 commit

  • Pull timer updates from Thomas Gleixner:
    "The timer departement delivers:

    - more year 2038 rework

    - a massive rework of the arm achitected timer

    - preparatory patches to allow NTP correction of clock event devices
    to avoid early expiry

    - the usual pile of fixes and enhancements all over the place"

    * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (91 commits)
    timer/sysclt: Restrict timer migration sysctl values to 0 and 1
    arm64/arch_timer: Mark errata handlers as __maybe_unused
    Clocksource/mips-gic: Remove redundant non devicetree init
    MIPS/Malta: Probe gic-timer via devicetree
    clocksource: Use GENMASK_ULL in definition of CLOCKSOURCE_MASK
    acpi/arm64: Add SBSA Generic Watchdog support in GTDT driver
    clocksource: arm_arch_timer: add GTDT support for memory-mapped timer
    acpi/arm64: Add memory-mapped timer support in GTDT driver
    clocksource: arm_arch_timer: simplify ACPI support code.
    acpi/arm64: Add GTDT table parse driver
    clocksource: arm_arch_timer: split MMIO timer probing.
    clocksource: arm_arch_timer: add structs to describe MMIO timer
    clocksource: arm_arch_timer: move arch_timer_needs_of_probing into DT init call
    clocksource: arm_arch_timer: refactor arch_timer_needs_probing
    clocksource: arm_arch_timer: split dt-only rate handling
    x86/uv/time: Set ->min_delta_ticks and ->max_delta_ticks
    unicore32/time: Set ->min_delta_ticks and ->max_delta_ticks
    um/time: Set ->min_delta_ticks and ->max_delta_ticks
    tile/time: Set ->min_delta_ticks and ->max_delta_ticks
    score/time: Set ->min_delta_ticks and ->max_delta_ticks
    ...

    Linus Torvalds
     

15 Apr, 2017

1 commit

  • In preparation for making the clockevents core NTP correction aware,
    all clockevent device drivers must set ->min_delta_ticks and
    ->max_delta_ticks rather than ->min_delta_ns and ->max_delta_ns: a
    clockevent device's rate is going to change dynamically and thus, the
    ratio of ns to ticks ceases to stay invariant.

    Make the mn10300 arch's clockevent driver initialize these fields properly.

    This patch alone doesn't introduce any change in functionality as the
    clockevents core still looks exclusively at the (untouched) ->min_delta_ns
    and ->max_delta_ns. As soon as this has changed, a followup patch will
    purge the initialization of ->min_delta_ns and ->max_delta_ns from this
    driver.

    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: Daniel Lezcano
    Cc: Richard Cochran
    Cc: Prarit Bhargava
    Cc: Stephen Boyd
    Cc: David Howells
    Cc: linux-am33-list@redhat.com
    Signed-off-by: Nicolai Stange
    Signed-off-by: John Stultz

    Nicolai Stange
     

29 Mar, 2017

1 commit


02 Mar, 2017

6 commits


28 Feb, 2017

1 commit

  • Apart from adding the helper function itself, the rest of the kernel is
    converted mechanically using:

    git grep -l 'atomic_inc.*mm_count' | xargs sed -i 's/atomic_inc(&\(.*\)->mm_count);/mmgrab\(\1\);/'
    git grep -l 'atomic_inc.*mm_count' | xargs sed -i 's/atomic_inc(&\(.*\)\.mm_count);/mmgrab\(\&\1\);/'

    This is needed for a later patch that hooks into the helper, but might
    be a worthwhile cleanup on its own.

    (Michal Hocko provided most of the kerneldoc comment.)

    Link: http://lkml.kernel.org/r/20161218123229.22952-1-vegard.nossum@oracle.com
    Signed-off-by: Vegard Nossum
    Acked-by: Michal Hocko
    Acked-by: Peter Zijlstra (Intel)
    Acked-by: David Rientjes
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Vegard Nossum
     

25 Dec, 2016

2 commits


12 Oct, 2016

1 commit

  • Pull uaccess.h prepwork from Al Viro:
    "Preparations to tree-wide switch to use of linux/uaccess.h (which,
    obviously, will allow to start unifying stuff for real). The last step
    there, ie

    PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*'
    sed -i -e "s!$PATT!#include !" \
    `git grep -l "$PATT"|grep -v ^include/linux/uaccess.h`

    is not taken here - I would prefer to do it once just before or just
    after -rc1. However, everything should be ready for it"

    * 'work.uaccess2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
    remove a stray reference to asm/uaccess.h in docs
    sparc64: separate extable_64.h, switch elf_64.h to it
    score: separate extable.h, switch module.h to it
    mips: separate extable.h, switch module.h to it
    x86: separate extable.h, switch sections.h to it
    remove stray include of asm/uaccess.h from cacheflush.h
    mn10300: remove a bogus processor.h->uaccess.h include
    xtensa: split uaccess.h into C and asm sides
    bonding: quit messing with IOCTL
    kill __kernel_ds_p off
    mn10300: finish verify_area() off
    frv: move HAVE_ARCH_UNMAPPED_AREA to pgtable.h
    exceptions: detritus removal

    Linus Torvalds
     

08 Oct, 2016

1 commit

  • When doing an nmi backtrace of many cores, most of which are idle, the
    output is a little overwhelming and very uninformative. Suppress
    messages for cpus that are idling when they are interrupted and just
    emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN".

    We do this by grouping all the cpuidle code together into a new
    .cpuidle.text section, and then checking the address of the interrupted
    PC to see if it lies within that section.

    This commit suitably tags x86 and tile idle routines, and only adds in
    the minimal framework for other architectures.

    Link: http://lkml.kernel.org/r/1472487169-14923-5-git-send-email-cmetcalf@mellanox.com
    Signed-off-by: Chris Metcalf
    Acked-by: Peter Zijlstra (Intel)
    Tested-by: Peter Zijlstra (Intel)
    Tested-by: Daniel Thompson [arm]
    Tested-by: Petr Mladek
    Cc: Aaron Tomlin
    Cc: Peter Zijlstra (Intel)
    Cc: "Rafael J. Wysocki"
    Cc: Russell King
    Cc: Thomas Gleixner
    Cc: Ingo Molnar
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Chris Metcalf
     

28 Sep, 2016

1 commit


05 Aug, 2016

1 commit

  • Pull RTC updates from Alexandre Belloni:
    "RTC for 4.8

    Cleanups:
    - huge cleanup of rtc-generic and char/genrtc this allowed to cleanup
    rtc-cmos, rtc-sh, rtc-m68k, rtc-powerpc and rtc-parisc
    - move mn10300 to rtc-cmos

    Subsystem:
    - fix wakealarms after hibernate
    - multiples fixes for rctest
    - simplify implementations of .read_alarm

    New drivers:
    - Maxim MAX6916

    Drivers:
    - ds1307: fix weekday
    - m41t80: add wakeup support
    - pcf85063: add support for PCF85063A variant
    - rv8803: extend i2c fix and other fixes
    - s35390a: fix alarm reading, this fixes instant reboot after
    shutdown for QNAP TS-41x
    - s3c: clock fixes"

    * tag 'rtc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (65 commits)
    rtc: rv8803: Clear V1F when setting the time
    rtc: rv8803: Stop the clock while setting the time
    rtc: rv8803: Always apply the I²C workaround
    rtc: rv8803: Fix read day of week
    rtc: rv8803: Remove the check for valid time
    rtc: rv8803: Kconfig: Indicate rx8900 support
    rtc: asm9260: remove .owner field for driver
    rtc: at91sam9: Fix missing spin_lock_init()
    rtc: m41t80: add suspend handlers for alarm IRQ
    rtc: m41t80: make it a real error message
    rtc: pcf85063: Add support for the PCF85063A device
    rtc: pcf85063: fix year range
    rtc: hym8563: in .read_alarm set .tm_sec to 0 to signal minute accuracy
    rtc: explicitly set tm_sec = 0 for drivers with minute accurancy
    rtc: s3c: Add s3c_rtc_{enable/disable}_clk in s3c_rtc_setfreq()
    rtc: s3c: Remove unnecessary call to disable already disabled clock
    rtc: abx80x: use devm_add_action_or_reset()
    rtc: m41t80: use devm_add_action_or_reset()
    rtc: fix a typo and reduce three empty lines to one
    rtc: s35390a: improve two comments in .set_alarm
    ...

    Linus Torvalds
     

26 Jun, 2016

1 commit

  • nn10300 has a dependency on mc146818_get_time/mc146818_set_time,
    which we want to move from the mc146818rtc.h header into the
    rtc subsystem, which in turn is not usable on mn10300.

    This changes mn10300 to use the modern rtc-cmos driver instead
    of the old RTC driver, and that in turn lets us completely
    remove the read_persistent_clock/update_persistent_clock callbacks.

    Signed-off-by: Arnd Bergmann
    Signed-off-by: Alexandre Belloni

    Arnd Bergmann
     

25 Jun, 2016

1 commit

  • We've had the thread info allocated together with the thread stack for
    most architectures for a long time (since the thread_info was split off
    from the task struct), but that is about to change.

    But the patches that move the thread info to be off-stack (and a part of
    the task struct instead) made it clear how confused the allocator and
    freeing functions are.

    Because the common case was that we share an allocation with the thread
    stack and the thread_info, the two pointers were identical. That
    identity then meant that we would have things like

    ti = alloc_thread_info_node(tsk, node);
    ...
    tsk->stack = ti;

    which certainly _worked_ (since stack and thread_info have the same
    value), but is rather confusing: why are we assigning a thread_info to
    the stack? And if we move the thread_info away, the "confusing" code
    just gets to be entirely bogus.

    So remove all this confusion, and make it clear that we are doing the
    stack allocation by renaming and clarifying the function names to be
    about the stack. The fact that the thread_info then shares the
    allocation is an implementation detail, and not really about the
    allocation itself.

    This is a pure renaming and type fix: we pass in the same pointer, it's
    just that we clarify what the pointer means.

    The ia64 code that actually only has one single allocation (for all of
    task_struct, thread_info and kernel thread stack) now looks a bit odd,
    but since "tsk->stack" is actually not even used there, that oddity
    doesn't matter. It would be a separate thing to clean that up, I
    intentionally left the ia64 changes as a pure brute-force renaming and
    type change.

    Acked-by: Andy Lutomirski
    Signed-off-by: Linus Torvalds

    Linus Torvalds
     

04 Jun, 2016

1 commit

  • The genrtc driver serves no purpose on mn10300 because it drives the
    same hardware as the original rtc.c driver, and the newer rtc-generic.c
    or rtc-cmos.c drivers on architectures that use the asm-generic/rtc.h
    header.

    I assume it was initially only added for completeness when the
    mn10300 port was done, but the older rtc.c driver was always used
    instead.

    We can also stop include asm-generic/rtc.h now, because we
    just call mc146818_set_time() directly.

    It would be nice to change the architecture to use the rtc-cmos driver
    next, and remove support for the old rtc driver as well.

    [linux@roeck-us.net: Add missing include file to proc-init.c]
    Signed-off-by: Arnd Bergmann
    Signed-off-by: Guenter Roeck
    Acked-by: Geert Uytterhoeven
    Signed-off-by: Alexandre Belloni

    Arnd Bergmann
     

21 May, 2016

2 commits

  • We need to call exit_thread from copy_process in a fail path. So make it
    accept task_struct as a parameter.

    [v2]
    * s390: exit_thread_runtime_instr doesn't make sense to be called for
    non-current tasks.
    * arm: fix the comment in vfp_thread_copy
    * change 'me' to 'tsk' for task_struct
    * now we can change only archs that actually have exit_thread

    [akpm@linux-foundation.org: coding-style fixes]
    Signed-off-by: Jiri Slaby
    Cc: "David S. Miller"
    Cc: "H. Peter Anvin"
    Cc: "James E.J. Bottomley"
    Cc: Aurelien Jacquiot
    Cc: Benjamin Herrenschmidt
    Cc: Catalin Marinas
    Cc: Chen Liqin
    Cc: Chris Metcalf
    Cc: Chris Zankel
    Cc: David Howells
    Cc: Fenghua Yu
    Cc: Geert Uytterhoeven
    Cc: Guan Xuetao
    Cc: Haavard Skinnemoen
    Cc: Hans-Christian Egtvedt
    Cc: Heiko Carstens
    Cc: Helge Deller
    Cc: Ingo Molnar
    Cc: Ivan Kokshaysky
    Cc: James Hogan
    Cc: Jeff Dike
    Cc: Jesper Nilsson
    Cc: Jiri Slaby
    Cc: Jonas Bonn
    Cc: Koichi Yasutake
    Cc: Lennox Wu
    Cc: Ley Foon Tan
    Cc: Mark Salter
    Cc: Martin Schwidefsky
    Cc: Matt Turner
    Cc: Max Filippov
    Cc: Michael Ellerman
    Cc: Michal Simek
    Cc: Mikael Starvik
    Cc: Paul Mackerras
    Cc: Peter Zijlstra
    Cc: Ralf Baechle
    Cc: Rich Felker
    Cc: Richard Henderson
    Cc: Richard Kuo
    Cc: Richard Weinberger
    Cc: Russell King
    Cc: Steven Miao
    Cc: Thomas Gleixner
    Cc: Tony Luck
    Cc: Vineet Gupta
    Cc: Will Deacon
    Cc: Yoshinori Sato
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jiri Slaby
     
  • We need to call exit_thread from copy_process in a fail path. Since
    exit_thread on mn10300 calls exit_thread_runtime_instr, make it accept
    task_struct as a parameter now.

    Signed-off-by: Jiri Slaby
    Cc: "David S. Miller"
    Cc: "H. Peter Anvin"
    Cc: "James E.J. Bottomley"
    Cc: Aurelien Jacquiot
    Cc: Benjamin Herrenschmidt
    Cc: Catalin Marinas
    Cc: Chen Liqin
    Cc: Chris Metcalf
    Cc: Chris Zankel
    Cc: David Howells
    Cc: Fenghua Yu
    Cc: Geert Uytterhoeven
    Cc: Guan Xuetao
    Cc: Haavard Skinnemoen
    Cc: Hans-Christian Egtvedt
    Cc: Heiko Carstens
    Cc: Helge Deller
    Cc: Ingo Molnar
    Cc: Ivan Kokshaysky
    Cc: James Hogan
    Cc: Jeff Dike
    Cc: Jesper Nilsson
    Cc: Jiri Slaby
    Cc: Jonas Bonn
    Cc: Koichi Yasutake
    Cc: Lennox Wu
    Cc: Ley Foon Tan
    Cc: Mark Salter
    Cc: Martin Schwidefsky
    Cc: Matt Turner
    Cc: Max Filippov
    Cc: Michael Ellerman
    Cc: Michal Simek
    Cc: Mikael Starvik
    Cc: Paul Mackerras
    Cc: Peter Zijlstra
    Cc: Ralf Baechle
    Cc: Rich Felker
    Cc: Richard Henderson
    Cc: Richard Kuo
    Cc: Richard Weinberger
    Cc: Russell King
    Cc: Steven Miao
    Cc: Thomas Gleixner
    Cc: Tony Luck
    Cc: Vineet Gupta
    Cc: Will Deacon
    Cc: Yoshinori Sato
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jiri Slaby
     

18 Mar, 2016

1 commit


02 Mar, 2016

1 commit

  • Let the non boot cpus call into idle with the corresponding hotplug state, so
    the hotplug core can handle the further bringup. That's a first step to
    convert the boot side of the hotplugged cpus to do all the synchronization
    with the other side through the state machine. For now it'll only start the
    hotplug thread and kick the full bringup of the cpu.

    Signed-off-by: Thomas Gleixner
    Cc: linux-arch@vger.kernel.org
    Cc: Rik van Riel
    Cc: Rafael Wysocki
    Cc: "Srivatsa S. Bhat"
    Cc: Peter Zijlstra
    Cc: Arjan van de Ven
    Cc: Sebastian Siewior
    Cc: Rusty Russell
    Cc: Steven Rostedt
    Cc: Oleg Nesterov
    Cc: Tejun Heo
    Cc: Andrew Morton
    Cc: Paul McKenney
    Cc: Linus Torvalds
    Cc: Paul Turner
    Link: http://lkml.kernel.org/r/20160226182341.614102639@linutronix.de
    Signed-off-by: Thomas Gleixner

    Thomas Gleixner
     

02 Sep, 2015

1 commit

  • Pull irq updates from Thomas Gleixner:
    "This updated pull request does not contain the last few GIC related
    patches which were reported to cause a regression. There is a fix
    available, but I let it breed for a couple of days first.

    The irq departement provides:

    - new infrastructure to support non PCI based MSI interrupts
    - a couple of new irq chip drivers
    - the usual pile of fixlets and updates to irq chip drivers
    - preparatory changes for removal of the irq argument from interrupt
    flow handlers
    - preparatory changes to remove IRQF_VALID"

    * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (129 commits)
    irqchip/imx-gpcv2: IMX GPCv2 driver for wakeup sources
    irqchip: Add bcm2836 interrupt controller for Raspberry Pi 2
    irqchip: Add documentation for the bcm2836 interrupt controller
    irqchip/bcm2835: Add support for being used as a second level controller
    irqchip/bcm2835: Refactor handle_IRQ() calls out of MAKE_HWIRQ
    PCI: xilinx: Fix typo in function name
    irqchip/gic: Ensure gic_cpu_if_up/down() programs correct GIC instance
    irqchip/gic: Only allow the primary GIC to set the CPU map
    PCI/MSI: pci-xgene-msi: Consolidate chained IRQ handler install/remove
    unicore32/irq: Prepare puv3_gpio_handler for irq argument removal
    tile/pci_gx: Prepare trio_handle_level_irq for irq argument removal
    m68k/irq: Prepare irq handlers for irq argument removal
    C6X/megamode-pic: Prepare megamod_irq_cascade for irq argument removal
    blackfin: Prepare irq handlers for irq argument removal
    arc/irq: Prepare idu_cascade_isr for irq argument removal
    sparc/irq: Use access helper irq_data_get_affinity_mask()
    sparc/irq: Use helper irq_data_get_irq_handler_data()
    parisc/irq: Use access helper irq_data_get_affinity_mask()
    mn10300/irq: Use access helper irq_data_get_affinity_mask()
    irqchip/i8259: Prepare i8259_irq_dispatch for irq argument removal
    ...

    Linus Torvalds
     

10 Aug, 2015

1 commit

  • Migrate mn10300 driver to the new 'set-state' interface provided by
    clockevents core, the earlier 'set-mode' interface is marked obsolete
    now.

    This also enables us to implement callbacks for new states of clockevent
    devices, for example: ONESHOT_STOPPED.

    We weren't doing anything in the ->set_mode() callback. So, this patch
    doesn't provide any set-state callbacks.

    Cc: David Howells
    Cc: Koichi Yasutake
    Cc: linux-am33-list@redhat.com
    Signed-off-by: Viresh Kumar
    Signed-off-by: Daniel Lezcano

    Viresh Kumar
     

01 Aug, 2015

1 commit

  • Use access helper irq_data_get_affinity_mask() to hide implementation
    details of struct irq_desc.

    Signed-off-by: Jiang Liu
    Cc: Konrad Rzeszutek Wilk
    Cc: Tony Luck
    Cc: linux-am33-list@redhat.com
    Cc: Bjorn Helgaas
    Cc: Benjamin Herrenschmidt
    Cc: Randy Dunlap
    Cc: Yinghai Lu
    Cc: Borislav Petkov
    Cc: David Howells
    Cc: Koichi Yasutake
    Link: http://lkml.kernel.org/r/1433145945-789-23-git-send-email-jiang.liu@linux.intel.com
    Signed-off-by: Thomas Gleixner

    Jiang Liu
     

25 Jun, 2015

1 commit

  • The field affinity in struct irq_data is type of cpumask_var_t, so
    we should pass in data->affinity instead of &data->affinity when
    calling cpumask_xxxx().

    Signed-off-by: Jiang Liu
    Cc: Konrad Rzeszutek Wilk
    Cc: Tony Luck
    Cc: linux-am33-list@redhat.com
    Cc: Bjorn Helgaas
    Cc: Benjamin Herrenschmidt
    Cc: Randy Dunlap
    Cc: Yinghai Lu
    Cc: Borislav Petkov
    Cc: David Howells
    Cc: Koichi Yasutake
    Link: http://lkml.kernel.org/r/1433145945-789-14-git-send-email-jiang.liu@linux.intel.com
    Signed-off-by: Thomas Gleixner

    Jiang Liu
     

13 Apr, 2015

1 commit


13 Feb, 2015

1 commit

  • If an attacker can cause a controlled kernel stack overflow, overwriting
    the restart block is a very juicy exploit target. This is because the
    restart_block is held in the same memory allocation as the kernel stack.

    Moving the restart block to struct task_struct prevents this exploit by
    making the restart_block harder to locate.

    Note that there are other fields in thread_info that are also easy
    targets, at least on some architectures.

    It's also a decent simplification, since the restart code is more or less
    identical on all architectures.

    [james.hogan@imgtec.com: metag: align thread_info::supervisor_stack]
    Signed-off-by: Andy Lutomirski
    Cc: Thomas Gleixner
    Cc: Al Viro
    Cc: "H. Peter Anvin"
    Cc: Ingo Molnar
    Cc: Kees Cook
    Cc: David Miller
    Acked-by: Richard Weinberger
    Cc: Richard Henderson
    Cc: Ivan Kokshaysky
    Cc: Matt Turner
    Cc: Vineet Gupta
    Cc: Russell King
    Cc: Catalin Marinas
    Cc: Will Deacon
    Cc: Haavard Skinnemoen
    Cc: Hans-Christian Egtvedt
    Cc: Steven Miao
    Cc: Mark Salter
    Cc: Aurelien Jacquiot
    Cc: Mikael Starvik
    Cc: Jesper Nilsson
    Cc: David Howells
    Cc: Richard Kuo
    Cc: "Luck, Tony"
    Cc: Geert Uytterhoeven
    Cc: Michal Simek
    Cc: Ralf Baechle
    Cc: Jonas Bonn
    Cc: "James E.J. Bottomley"
    Cc: Helge Deller
    Cc: Benjamin Herrenschmidt
    Cc: Paul Mackerras
    Acked-by: Michael Ellerman (powerpc)
    Tested-by: Michael Ellerman (powerpc)
    Cc: Martin Schwidefsky
    Cc: Heiko Carstens
    Cc: Chen Liqin
    Cc: Lennox Wu
    Cc: Chris Metcalf
    Cc: Guan Xuetao
    Cc: Chris Zankel
    Cc: Max Filippov
    Cc: Oleg Nesterov
    Cc: Guenter Roeck
    Signed-off-by: James Hogan
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andy Lutomirski
     

06 Aug, 2014

2 commits


05 Mar, 2014

2 commits

  • This patch removes the IRQF_DISABLED flag from mn10300 architecture
    code. It's a NOOP since 2.6.35 and it will be removed one day.

    Signed-off-by: Michael Opdenacker
    Cc: srivatsa.bhat@linux.vnet.ibm.com
    Cc: linux-am33-list@redhat.com
    Cc: dhowells@redhat.com
    Cc: yasutake.koichi@jp.panasonic.com
    Link: http://lkml.kernel.org/r/1393965111-17092-1-git-send-email-michael.opdenacker@free-electrons.com
    Signed-off-by: Thomas Gleixner

    Michael Opdenacker
     
  • Let the core do the irq_desc resolution.

    No functional change.

    Signed-off-by: Thomas Gleixner
    Cc: Peter Zijlstra
    Cc: David Howells
    Cc: mn10300
    Link: http://lkml.kernel.org/r/20140223212737.751487689@linutronix.de
    Signed-off-by: Thomas Gleixner

    Thomas Gleixner
     

08 Oct, 2013

1 commit