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2017-01-17clocksource/exynos_mct: Clear interrupt when cpu is shut downJoonyoung Shim1-0/+1
When a CPU goes offline a potentially pending timer interrupt is not cleared. When the CPU comes online again then the pending interrupt is delivered before the per cpu clockevent device is initialized. As a consequence the tick interrupt handler dereferences a NULL pointer. [ 51.251378] Unable to handle kernel NULL pointer dereference at virtual address 00000040 [ 51.289348] task: ee942d00 task.stack: ee960000 [ 51.293861] PC is at tick_periodic+0x38/0xb0 [ 51.298102] LR is at tick_handle_periodic+0x1c/0x90 Clear the pending interrupt in the cpu dying path. Fixes: 56a94f13919c ("clocksource: exynos_mct: Avoid blocking calls in the cpu hotplug notifier") Reported-by: Seung-Woo Kim <sw0312.kim@samsung.com> Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Cc: linux-samsung-soc@vger.kernel.org Cc: cw00.choi@samsung.com Cc: daniel.lezcano@linaro.org Cc: stable@vger.kernel.org Cc: javier@osg.samsung.com Cc: kgene@kernel.org Cc: krzk@kernel.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1484628876-22065-1-git-send-email-jy0922.shim@samsung.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-25Merge branch 'timers-urgent-for-linus' of ↵Linus Torvalds32-70/+70
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer type cleanups from Thomas Gleixner: "This series does a tree wide cleanup of types related to timers/timekeeping. - Get rid of cycles_t and use a plain u64. The type is not really helpful and caused more confusion than clarity - Get rid of the ktime union. The union has become useless as we use the scalar nanoseconds storage unconditionally now. The 32bit timespec alike storage got removed due to the Y2038 limitations some time ago. That leaves the odd union access around for no reason. Clean it up. Both changes have been done with coccinelle and a small amount of manual mopping up" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: ktime: Get rid of ktime_equal() ktime: Cleanup ktime_set() usage ktime: Get rid of the union clocksource: Use a plain u64 instead of cycle_t
2016-12-25clocksource: Use a plain u64 instead of cycle_tThomas Gleixner32-70/+70
There is no point in having an extra type for extra confusion. u64 is unambiguous. Conversion was done with the following coccinelle script: @rem@ @@ -typedef u64 cycle_t; @fix@ typedef cycle_t; @@ -cycle_t +u64 Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: John Stultz <john.stultz@linaro.org>
2016-12-25cpu/hotplug: Cleanup state namesThomas Gleixner11-12/+12
When the state names got added a script was used to add the extra argument to the calls. The script basically converted the state constant to a string, but the cleanup to convert these strings into meaningful ones did not happen. Replace all the useless strings with 'subsys/xxx/yyy:state' strings which are used in all the other places already. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Link: http://lkml.kernel.org/r/20161221192112.085444152@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-19clocksource/drivers/moxart: Plug memory and mapping leaksSudip Mukherjee1-6/+16
If of_iomap() or any other subsequent function fails moxart_timer_init() exits without freeing memory and unmapping the timer base. Add proper cleanup points. Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Link: http://lkml.kernel.org/r/1482099996-1524-1-git-send-email-sudipm.mukherjee@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-15Merge tag 'armsoc-soc' of ↵Linus Torvalds1-6/+5
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC platform updates from Arnd Bergmann: "These are updates for platform specific code on 32-bit ARM machines, essentially anything that can not (yet) be expressed using DT files. Noteworthy changes include: - Added support for the TI DRA71x family of SoCs in mach-omap2, this is an new variant of the the DRA72x/DRA74x automotive infotainment chips we already supported for a while. - Added support for the ST STM32F746 SoC, the first Cortex-M7 based microcontroller we support, related to the smaller STM32F4 family. - Renesas adds support for r8a7743 and r8a7745 in mach-shmobile, see http://elinux.org/RZ-G - SMP is now supported on the OX820 platform - A lot of code in mach-omap2 gets removed as a follow-up to removing support for board files in the previous release - Davinci has some new work to improve USB support - For i.MX, the performance monitor now supports profiling the memory controller using 'perf'" * tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (95 commits) ARM: davinci: da830-evm: use gpio descriptor for mmc pins ARM: davinci: da850-evm: use gpio descriptor for mmc pins ARM: davinci: hawk: use gpio descriptor for mmc pins ARM: ARTPEC-6: add select MFD_SYSCON to MACH_ARTPEC6 ARM: davinci: da8xx: Fix ohci device name ARM: oxnas: Add OX820 config and makefile entry ARM: oxnas: Add OX820 SMP support ARM: davinci: PM: fix build when da850 not compiled in ARM: orion5x: remove legacy support of ls-chl ARM: integrator: drop EBI access use syscon ARM: BCM5301X: Add back handler ignoring external imprecise aborts ARM: davinci: PM: support da8xx DT platforms ARM: davinci: PM: cleanup: remove references to pdata ARM: davinci: PM: rework init, remove platform device ARM: Kconfig: Introduce MACH_STM32F746 flag ARM: mach-stm32: Add a new SOC - STM32F746 ARM: shmobile: document SK-RZG1E board ARM: shmobile: r8a7745: basic SoC support ARM: imx: mach-imx6ul: add imx6ull support ARM: zynq: Reserve correct amount of non-DMA RAM ...
2016-12-15Merge tag 'arc-4.10-rc1-part1' of ↵Linus Torvalds4-20/+561
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC updates from Vineet Gupta: "These are mostly timer/clocksource driver updates which were Reviewed/Acked by Daniel but had to be merged via ARC tree due to dependencies. I will follow up with another pull request with actual ARC changes early next week ! Summary: - Moving ARC timer driver into drivers/clocksource - EZChip timer driver updates [Noam] - ARC AXS103 and HAPS platform updates [Alexey]" * tag 'arc-4.10-rc1-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: axs10x: really enable ARC PGU ARC: rename Zebu platform support to HAPS clocksource: nps: avoid maybe-uninitialized warning clocksource: Add clockevent support to NPS400 driver clocksource: update "fn" at CLOCKSOURCE_OF_DECLARE() of nps400 timer soc: Support for NPS HW scheduling clocksource: import ARC timer driver ARC: breakout timer include code into separate header ... ARC: move mcip.h into include/soc and adjust the includes ARC: breakout aux handling into a separate header ARC: time: move time_init() out of the driver ARC: timer: gfrc, rtc: build under same option (64-bit timers) ARC: timer: gfrc, rtc: Read BCR to detect whether hardware exists ... ARC: timer: gfrc, rtc: deuglify big endian code
2016-11-30clocksource: nps: avoid maybe-uninitialized warningArnd Bergmann1-2/+3
We get a harmless false-positive warning with the newly added nps clocksource driver: drivers/clocksource/timer-nps.c: In function 'nps_setup_clocksource': drivers/clocksource/timer-nps.c:102:6: error: 'nps_timer1_freq' may be used uninitialized in this function [-Werror=maybe-uninitialized] Gcc here fails to identify that IS_ERR() is only true if PTR_ERR() has a nonzero value. Using PTR_ERR_OR_ZERO() to convert the result first makes this obvious and shuts up the warning. Fixes: 0ee4d9922df5 ("clocksource: Add clockevent support to NPS400 driver") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-11-30clocksource: Add clockevent support to NPS400 driverNoam Camus1-0/+170
Till now we used clockevent from generic ARC driver. This was enough as long as we worked with simple multicore SoC. When we are working with multithread SoC each HW thread can be scheduled to receive timer interrupt using timer mask register. This patch will provide a way to control clock events per HW thread. The design idea is that for each core there is dedicated register (TSI) serving all 16 HW threads. The register is a bitmask with one bit for each HW thread. When HW thread wants that next expiration of timer interrupt will hit it then the proper bit should be set in this dedicated register. When timer expires all HW threads within this core which their bit is set at the TSI register will be interrupted. Driver can be used from device tree by: compatible = "ezchip,nps400-timer0" <-- for clocksource compatible = "ezchip,nps400-timer1" <-- for clockevent Note that name convention for timer0/timer1 was taken from legacy ARC design. This design is our base before adding HW threads. For backward compatibility we keep "ezchip,nps400-timer" for clocksource Signed-off-by: Noam Camus <noamca@mellanox.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Rob Herring <robh@kernel.org>
2016-11-30clocksource: update "fn" at CLOCKSOURCE_OF_DECLARE() of nps400 timerNoam Camus1-26/+39
nps_setup_clocksource() should take node as only argument as defined by typedef int (*of_init_fn_1_ret)(struct device_node *) Therefore need to replace: int __init nps_setup_clocksource(struct device_node *node, struct clk *clk) with int __init nps_setup_clocksource(struct device_node *node) This patch also serve as preparation for next patch which add support for clockevents to nps400. Specifically we add new function nps_get_timer_clk() to serve clocksource and later clockevent registration. Signed-off-by: Noam Camus <noamca@mellanox.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-11-30clocksource: import ARC timer driverVineet Gupta3-0/+357
This adds support for - CONFIG_ARC_TIMERS : legacy 32-bit TIMER0 and TIMER1 which count UP from @CNT to @LIMIT, before optionally triggering an interrupt. These are programmed using ARC auxiliary register interface. These are present in all ARC cores (ARC700 and ARC HS38) TIMER0 serves as clockevent for all ARC linux builds. TIMER1 is used for clocksource in arc700 builds. - CONFIG_ARC_TIMERS_64BIT: 64-bit counters, RTC and GFRC found in ARC HS38 cores. These are independnet IP blocks with different programming model respectively. Link: http://lkml.kernel.org/r/20161111231132.GA4186@mai Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-11-22clocksource/drivers/bcm2835_timer: Unmap region obtained by of_iomapArvind Yadav1-4/+10
Free memory mapping, if bcm2835_timer_init is not successful. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-11-21clocksource/drivers/arm_arch_timer: Map frame with of_io_request_and_map()Stephen Boyd1-2/+3
Let's use the of_io_request_and_map() API so that the frame region is protected and shows up in /proc/iomem. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Marc Zyngier <marc.zyngier@arm.com>
2016-11-21clocksource/drivers/arm_arch_timer: Don't assume clock runs in suspendBrian Norris1-1/+8
The ARM specifies that the system counter "must be implemented in an always-on power domain," and so we try to use the counter as a source of timekeeping across suspend/resume. Unfortunately, some SoCs (e.g., Rockchip's RK3399) do not keep the counter ticking properly when switched from their high-power clock to the lower-power clock used in system suspend. Support this quirk by adding a new device tree property. Signed-off-by: Brian Norris <briannorris@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-11-17Merge tag 'pxa-for-4.10' of https://github.com/rjarzmik/linux into next/socOlof Johansson1-6/+5
This is the pxa changes for v4.10 cycle. This cycle is covering : - some clock fixes common with sa1100 architecture - the consequence of the pxa_camera conversion to v4l2 - a small irq related fix for pxa25x device-tree only * tag 'pxa-for-4.10' of https://github.com/rjarzmik/linux: ARM: pxa: fix pxa25x interrupt init ARM: pxa: remove duplicated include from spitz.c ARM: pxa: em-x270: use the new pxa_camera platform_data ARM: pxa: ezx: use the new pxa_camera platform_data ARM: pxa: mioa701: use the new pxa_camera platform_data ARM: pxa: pxa_cplds: honor probe deferral ARM: sa11x0/pxa: get rid of get_clock_tick_rate watchdog: sa11x0/pxa: get rid of get_clock_tick_rate ARM: sa11x0/pxa: acquire timer rate from the clock rate clk: pxa25x: OSTIMER0 clocks from the main oscillator Signed-off-by: Olof Johansson <olof@lixom.net>
2016-10-20Revert "clocksource/drivers/timer_sun5i: Replace code by clocksource_mmio_init"Chen-Yu Tsai1-2/+14
struct clocksource is also used by the clk notifier callback, to unregister and re-register the clocksource with a different clock rate. clocksource_mmio_init does not pass back a pointer to the struct used, and the clk notifier callback assumes that the struct clocksource in struct sun5i_timer_clksrc is valid. This results in a kernel NULL pointer dereference when the hstimer clock is changed: Unable to handle kernel NULL pointer dereference at virtual address 00000004 [<c03a4678>] (clocksource_unbind) from [<c03a46d4>] (clocksource_unregister+0x2c/0x44) [<c03a46d4>] (clocksource_unregister) from [<c0a6f350>] (sun5i_rate_cb_clksrc+0x34/0x3c) [<c0a6f350>] (sun5i_rate_cb_clksrc) from [<c035ea50>] (notifier_call_chain+0x44/0x84) [<c035ea50>] (notifier_call_chain) from [<c035edc0>] (__srcu_notifier_call_chain+0x44/0x60) [<c035edc0>] (__srcu_notifier_call_chain) from [<c035edf4>] (srcu_notifier_call_chain+0x18/0x20) [<c035edf4>] (srcu_notifier_call_chain) from [<c0670174>] (__clk_notify+0x70/0x7c) [<c0670174>] (__clk_notify) from [<c06702c0>] (clk_propagate_rate_change+0xa4/0xc4) [<c06702c0>] (clk_propagate_rate_change) from [<c0670288>] (clk_propagate_rate_change+0x6c/0xc4) Revert the commit for now. clocksource_mmio_init can be made to pass back a pointer, but the code churn and usage of an inner struct might not be worth it. Fixes: 157dfadef832 ("clocksource/drivers/timer_sun5i: Replace code by clocksource_mmio_init") Reported-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Chen-Yu Tsai <wens@csie.org> Cc: linux-sunxi@googlegroups.com Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/20161018054918.26855-1-wens@csie.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-10-20clocksource: Add J-Core timer/clocksource driverRich Felker3-0/+260
At the hardware level, the J-Core PIT is integrated with the interrupt controller, but it is represented as its own device and has an independent programming interface. It provides a 12-bit countdown timer, which is not presently used, and a periodic timer. The interval length for the latter is programmable via a 32-bit throttle register whose units are determined by a bus-period register. The periodic timer is used to implement both periodic and oneshot clock event modes; in oneshot mode the interrupt handler simply disables the timer as soon as it fires. Despite its device tree node representing an interrupt for the PIT, the actual irq generated is programmable, not hard-wired. The driver is responsible for programming the PIT to generate the hardware irq number that the DT assigns to it. On SMP configurations, J-Core provides cpu-local instances of the PIT; no broadcast timer is needed. This driver supports the creation of the necessary per-cpu clock_event_device instances. A nanosecond-resolution clocksource is provided using the J-Core "RTC" registers, which give a 64-bit seconds count and 32-bit nanoseconds that wrap every second. The driver converts these to a full-range 32-bit nanoseconds count. Signed-off-by: Rich Felker <dalias@libc.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: devicetree@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Link: http://lkml.kernel.org/r/b591ff12cc5ebf63d1edc98da26046f95a233814.1476393790.git.dalias@libc.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-10-18ARM: sa11x0/pxa: acquire timer rate from the clock rateRobert Jarzmik1-6/+5
As both pxa and sa1100 provide a clock to the timer, the rate can be inferred from the clock rather than hard encoded in a functional call. This patch changes the pxa timer to have a mandatory clock which is used as the timer rate. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
2016-10-07Merge tag 'armsoc-drivers' of ↵Linus Torvalds2-1/+5
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC driver updates from Arnd Bergmann: "Driver updates for ARM SoCs, including a couple of newly added drivers: - The Qualcomm external bus interface 2 (EBI2), used in some of their mobile phone chips for connecting flash memory, LCD displays or other peripherals - Secure monitor firmware for Amlogic SoCs, and an NVMEM driver for the EFUSE based on that firmware interface. - Perf support for the AppliedMicro X-Gene performance monitor unit - Reset driver for STMicroelectronics STM32 - Reset driver for SocioNext UniPhier SoCs Aside from these, there are minor updates to SoC-specific bus, clocksource, firmware, pinctrl, reset, rtc and pmic drivers" * tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (50 commits) bus: qcom-ebi2: depend on HAS_IOMEM pinctrl: mvebu: orion5x: Generalise mv88f5181l support for 88f5181 clk: mvebu: Add clk support for the orion5x SoC mv88f5181 dt-bindings: EXYNOS: Add Exynos5433 PMU compatible clocksource: exynos_mct: Add the support for ARM64 perf: xgene: Add APM X-Gene SoC Performance Monitoring Unit driver Documentation: Add documentation for APM X-Gene SoC PMU DTS binding MAINTAINERS: Add entry for APM X-Gene SoC PMU driver bus: qcom: add EBI2 driver bus: qcom: add EBI2 device tree bindings rtc: rtc-pm8xxx: Add support for pm8018 rtc nvmem: amlogic: Add Amlogic Meson EFUSE driver firmware: Amlogic: Add secure monitor driver soc: qcom: smd: Reset rx tail rather than tx memory: atmel-sdramc: fix a possible NULL dereference reset: hi6220: allow to compile test driver on other architectures reset: zynq: add driver Kconfig option reset: sunxi: add driver Kconfig option reset: stm32: add driver Kconfig option reset: socfpga: add driver Kconfig option ...
2016-10-03Merge branch 'timers-core-for-linus' of ↵Linus Torvalds5-126/+174
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer updates from Thomas Gleixner: "A rather smalish set of updates for timers and timekeeping: - Two core fixes to prevent potential undefinded behaviour about which gcc is complaining rightfully. - A fix to prevent stopping the tick on an (soon) offline CPU so it can complete the shutdown procedure. - Wait for clocks to stabilize before making decisions, so a not yet validated clock is not rejected. - The usual pile of fixes to the various clocksource drivers. - Core code typo and include fixlets" * 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: timekeeping: Include the correct header for errno definitions clocksource/drivers/ti-32k: Prevent ftrace recursion clocksource/mips-gic-timer: Stop checking cpu_has_counter clocksource/mips-gic-timer: Print an error if IRQ setup fails tick/nohz: Prevent stopping the tick on an offline CPU clocksource/drivers/oxnas: Add OX820 compatible clocksource/drivers/timer-atmel-pit: Simplify IRQ handler clocksource/drivers/timer-atmel-pit: Remove uselesss WARN_ON_ONCE clocksource/drivers/timer-atmel-pit: Drop at91sam926x_pit_common_init clocksource/drivers/moxart: Replace panic by pr_err clocksource/drivers/moxart: Replace setup_irq by request_irq clocksource/drivers/moxart: Add Aspeed support clocksource/drivers/moxart: Use struct to hold state clocksource/drivers/moxart: Refactor enable/disable time: Avoid undefined behaviour in ktime_add_safe() time: Avoid undefined behaviour in timespec64_add_safe() timekeeping: Prints the amounts of time spent during suspend clocksource: Defer override invalidation unless clock is unstable hrtimer: Spelling fixes
2016-10-03Merge tag 'arm64-upstream' of ↵Linus Torvalds2-7/+116
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Will Deacon: "It's a bit all over the place this time with no "killer feature" to speak of. Support for mismatched cache line sizes should help people seeing whacky JIT failures on some SoCs, and the big.LITTLE perf updates have been a long time coming, but a lot of the changes here are cleanups. We stray outside arch/arm64 in a few areas: the arch/arm/ arch_timer workaround is acked by Russell, the DT/OF bits are acked by Rob, the arch_timer clocksource changes acked by Marc, CPU hotplug by tglx and jump_label by Peter (all CC'd). Summary: - Support for execute-only page permissions - Support for hibernate and DEBUG_PAGEALLOC - Support for heterogeneous systems with mismatches cache line sizes - Errata workarounds (A53 843419 update and QorIQ A-008585 timer bug) - arm64 PMU perf updates, including cpumasks for heterogeneous systems - Set UTS_MACHINE for building rpm packages - Yet another head.S tidy-up - Some cleanups and refactoring, particularly in the NUMA code - Lots of random, non-critical fixes across the board" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (100 commits) arm64: tlbflush.h: add __tlbi() macro arm64: Kconfig: remove SMP dependence for NUMA arm64: Kconfig: select OF/ACPI_NUMA under NUMA config arm64: fix dump_backtrace/unwind_frame with NULL tsk arm/arm64: arch_timer: Use archdata to indicate vdso suitability arm64: arch_timer: Work around QorIQ Erratum A-008585 arm64: arch_timer: Add device tree binding for A-008585 erratum arm64: Correctly bounds check virt_addr_valid arm64: migrate exception table users off module.h and onto extable.h arm64: pmu: Hoist pmu platform device name arm64: pmu: Probe default hw/cache counters arm64: pmu: add fallback probe table MAINTAINERS: Update ARM PMU PROFILING AND DEBUGGING entry arm64: Improve kprobes test for atomic sequence arm64/kvm: use alternative auto-nop arm64: use alternative auto-nop arm64: alternative: add auto-nop infrastructure arm64: lse: convert lse alternatives NOP padding to use __nops arm64: barriers: introduce nops and __nops macros for NOP sequences arm64: sysreg: replace open-coded mrs_s/msr_s with {read,write}_sysreg_s ...
2016-09-23arm/arm64: arch_timer: Use archdata to indicate vdso suitabilityScott Wood1-8/+3
Instead of comparing the name to a magic string, use archdata to explicitly communicate whether the arch timer is suitable for direct vdso access. Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Russell King <rmk+kernel@armlinux.org.uk> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Scott Wood <oss@buserror.net> Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-09-23arm64: arch_timer: Work around QorIQ Erratum A-008585Scott Wood2-0/+114
Erratum A-008585 says that the ARM generic timer counter "has the potential to contain an erroneous value for a small number of core clock cycles every time the timer value changes". Accesses to TVAL (both read and write) are also affected due to the implicit counter read. Accesses to CVAL are not affected. The workaround is to reread TVAL and count registers until successive reads return the same value. Writes to TVAL are replaced with an equivalent write to CVAL. The workaround is to reread TVAL and count registers until successive reads return the same value, and when writing TVAL to retry until counter reads before and after the write return the same value. The workaround is enabled if the fsl,erratum-a008585 property is found in the timer node in the device tree. This can be overridden with the clocksource.arm_arch_timer.fsl-a008585 boot parameter, which allows KVM users to enable the workaround until a mechanism is implemented to automatically communicate this information. This erratum can be found on LS1043A and LS2080A. Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Scott Wood <oss@buserror.net> [will: renamed read macro to reflect that it's not usually unstable] Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-09-22clocksource/drivers/ti-32k: Prevent ftrace recursionJisheng Zhang1-1/+1
Currently ti-32k can be used as a scheduler clock. We properly marked omap_32k_read_sched_clock() as notrace but we then call another function ti_32k_read_cycles() that _wasn't_ notrace. Having a traceable function in the sched_clock() path leads to a recursion within ftrace and a kernel crash. Fix this by adding notrace attribute to the ti_32k_read_cycles() function. Signed-off-by: Jisheng Zhang <jszhang@marvell.com> Cc: daniel.lezcano@linaro.org Cc: linux-arm-kernel@lists.infradead.org Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20160922075621.3725-1-jszhang@marvell.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-09-20clocksource/mips-gic-timer: Stop checking cpu_has_counterPaul Burton1-1/+1
The cpu_has_counter macro indicates whether the current CPU has a working coprocessor 0 count & compare registers, and has no bearing on the GIC. Stop checking it. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Link: http://lkml.kernel.org/r/20160913165644.627-2-paul.burton@imgtec.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-09-20clocksource/mips-gic-timer: Print an error if IRQ setup failsPaul Burton1-1/+4
We've checked for errors from setup_irq_percpu since commit f95ac8558b88 ("CLOCKSOURCE: mips-gic: Add missing error returns checks") but didn't print an error message in the failure case. This makes it very easy to overlook the GIC timer clock event driver not being registered, since we'll generally just use a different clock event driver if that happens. Print an error if IRQ setup fails in order to make such problems harder to miss (ie. not completely silent). Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Link: http://lkml.kernel.org/r/20160913165644.627-1-paul.burton@imgtec.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-09-19Merge tag 'samsung-drivers-4.9-2' of ↵Arnd Bergmann2-1/+5
git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into next/drivers Pull "Samsung drivers/soc update for v4.9" from Krzysztof Kozlowski: 1. Allow compile testing of exynos-mct clocksource driver on ARM64. 2. Document Exynos5433 PMU compatible (already used by clkout driver and more will be coming soon). * tag 'samsung-drivers-4.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux: dt-bindings: EXYNOS: Add Exynos5433 PMU compatible clocksource: exynos_mct: Add the support for ARM64
2016-09-16clocksource: exynos_mct: Add the support for ARM64Chanwoo Choi2-1/+5
This patch allows building and compile-testing the driver also for ARM64. The delay_timer is only supported on ARMv7. Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> [k.kozlowski: Adjusted commit msg] Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
2016-09-12clocksource/drivers/oxnas: Add OX820 compatibleNeil Armstrong1-0/+2
In order to support the Oxford Semiconductor OX820 SoC, add new compatible string to rps timer driver. Also add new string in the dt-bindings. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-09-12clocksource/drivers/timer-atmel-pit: Simplify IRQ handlerAlexandre Belloni1-8/+3
Because the PIT is also a proper clocksource, the timekeeping code is already able to handle lost ticks. Reported-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-09-12clocksource/drivers/timer-atmel-pit: Remove uselesss WARN_ON_ONCEAlexandre Belloni1-6/+0
IRQ handlers are running with IRQ disabled for a while, remove wrong comment and useless test. Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-09-12clocksource/drivers/timer-atmel-pit: Drop at91sam926x_pit_common_initAlexandre Belloni1-45/+34
Merge at91sam926x_pit_common_init in at91sam926x_pit_dt_init as this is the only initialization method now. Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-09-12clocksource/drivers/moxart: Replace panic by pr_errDaniel Lezcano1-2/+4
The clksrc-of code is supposed to catch the return code and fail gracefully. Don't panic on error, but print the error and exit with a relevant error code. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Joel Stanley <joel@jms.id.au>
2016-09-12clocksource/drivers/moxart: Replace setup_irq by request_irqDaniel Lezcano1-6/+2
Save memory space and line of code by replacing setup_irq by request_irq. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Joel Stanley <joel@jms.id.au>
2016-09-09clocksource/drivers/moxart: Add Aspeed supportJoel Stanley1-0/+32
The Aspeed SoC has timer IP with a very similar register layout to the moxart timer. This patch adds support for the fourth and fifth gen aspeed SoCs, and has been tested on the ast2400 and ast2500. Signed-off-by: Joel Stanley <joel@jms.id.au> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-09-09clocksource/drivers/moxart: Use struct to hold stateJoel Stanley1-61/+86
Add a struct moxart_timer to hold the driver state, including the irqaction and struct clock_event_device. Most importantly this holds values for enabling and disabling the timer, so future support can be added for devices that use different bits for enable/disable. In preparation for future hardware support we add a MOXART prefix to the existing values. Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-09-09clocksource/drivers/moxart: Refactor enable/disableJoel Stanley1-6/+16
This patch abstracts the enable and disable register writes into their own functions in preparation for future changes to use SoC specific values for the writes. Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-08-29clocksource/drivers/atmel-pit: Fix compilation errorDaniel Lezcano1-0/+1
The previous fix introduced a check against the ret variable which is not defined, hence producing a compilation error: linux/drivers/clocksource/timer-atmel-pit.c: In function ‘at91sam926x_pit_dt_init’: linux/drivers/clocksource/timer-atmel-pit.c:264:2: error: ‘ret’ undeclared (first use in this function) ret = clk_prepare_enable(data->mck); ^ linux/drivers/clocksource/timer-atmel-pit.c:264:2: note: each undeclared identifier is reported only once for each function it appears in Add the missing the variable 'ret'. Fixes: 504f34c9e45c "clocksource/drivers/atmel-pit: Convert init function to return error" Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: alexandre.belloni@free-electrons.com Cc: motobud@gmail.com Cc: realbright@lgcns.com Link: http://lkml.kernel.org/r/1472453043-24287-1-git-send-email-daniel.lezcano@linaro.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-08-26clocksource/drivers/sun4i: Clear interrupts after stopping timer in probe ↵Chen-Yu Tsai1-1/+8
function The bootloader (U-boot) sometimes uses this timer for various delays. It uses it as a ongoing counter, and does comparisons on the current counter value. The timer counter is never stopped. In some cases when the user interacts with the bootloader, or lets it idle for some time before loading Linux, the timer may expire, and an interrupt will be pending. This results in an unexpected interrupt when the timer interrupt is enabled by the kernel, at which point the event_handler isn't set yet. This results in a NULL pointer dereference exception, panic, and no way to reboot. Clear any pending interrupts after we stop the timer in the probe function to avoid this. Cc: stable@vger.kernel.org Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-08-26drivers/clocksource/pistachio: Fix memory corruption in initMarcin Nowakowski1-4/+4
Driver init code incorrectly uses the block base address and as a result clears clocksource structure's fields instead of the hardware registers. Commit 09a998201649 ("timekeeping: Lift clocksource cacheline restriction") has changed the offsets within pistachio_clocksource structure and what has previously gone unnoticed now leads to a kernel panic during boot. Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-08-26clocksource/drivers/timer-atmel-pit: Enable mck clockAlexandre Belloni1-0/+6
mck is needed to get the PIT working. Explicitly prepare_enable it instead of assuming it is enabled. This solves an issue where the system is freezing when the ETM/ETB drivers are enabled. Reported-by: Olivier Schonken <olivier.schonken@gmail.com> Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2016-08-24clocksource/drivers/pxa: Fix include files for compilationBaoyou Xie1-0/+2
We get 1 warning about global functions without a declaration in the clocksource/drivers/pxa driver when building with W=1: drivers/clocksource/pxa_timer.c:221:13: warning: no previous prototype for 'pxa_timer_nodt_init' [-Wmissing-prototypes] void __init pxa_timer_nodt_init(int irq, void __iomem *base, In fact, this function is declared in pxa.h, so this patch add missing header dependencies. Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Cc: daniel.lezcano@linaro.org Cc: xie.baoyou@zte.com.cn Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1471965569-4104-1-git-send-email-baoyou.xie@linaro.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-08-17clocksource/drivers/mips-gic-timer: Make gic_clocksource_of_init() return intPaul Gortmaker1-1/+1
In commit: d8152bf85d2c0 ("clocksource/drivers/mips-gic-timer: Convert init function to return error") several return values were added to a void function resulting in the following warnings: clocksource/mips-gic-timer.c: In function 'gic_clocksource_of_init': clocksource/mips-gic-timer.c:175:3: warning: 'return' with a value, in function returning void [enabled by default] clocksource/mips-gic-timer.c:183:4: warning: 'return' with a value, in function returning void [enabled by default] clocksource/mips-gic-timer.c:190:3: warning: 'return' with a value, in function returning void [enabled by default] clocksource/mips-gic-timer.c:195:3: warning: 'return' with a value, in function returning void [enabled by default] clocksource/mips-gic-timer.c:200:3: warning: 'return' with a value, in function returning void [enabled by default] clocksource/mips-gic-timer.c:211:2: warning: 'return' with a value, in function returning void [enabled by default] clocksource/mips-gic-timer.c: At top level: clocksource/mips-gic-timer.c:213:1: warning: comparison of distinct pointer types lacks a cast [enabled by default] clocksource/mips-gic-timer.c: In function 'gic_clocksource_of_init': clocksource/mips-gic-timer.c:183:18: warning: ignoring return value of 'PTR_ERR', declared with attribute warn_unused_result [-Wunused-result] Given that the addition of the return values was intentional, it seems that the conversion of the containing function from void to int was simply overlooked. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-mips@linux-mips.org Fixes: d8152bf85d2c ("clocksource/drivers/mips-gic-timer: Convert init function to return error") Link: http://lkml.kernel.org/r/1471429296-9053-3-git-send-email-daniel.lezcano@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-08-17clocksource/drivers/kona: Fix get_counter() error handlingArnd Bergmann1-6/+10
I could not figure out why, but GCC cannot prove that the kona_timer_init() function always initializes its two outputs, and we get a warning for the use of the 'lsw' variable later, which is obviously correct. drivers/clocksource/bcm_kona_timer.c: In function 'kona_timer_init': drivers/clocksource/bcm_kona_timer.c:119:13: error: 'lsw' may be used uninitialized in this function [-Werror=maybe-uninitialized] Slightly reordering the loop makes the warning disappear, after it becomes more obvious to the compiler that the loop is always entered on the first iteration. As pointed out by Ray Jui, there is a related problem in the way we deal with the loop running into the limit, as we just keep going there with an invalid counter data, so instead we now propagate a -ETIMEDOUT result to the caller. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Ray Jui <ray.jui@broadcom.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: bcm-kernel-feedback-list@broadcom.com Link: http://lkml.kernel.org/r/1471429296-9053-2-git-send-email-daniel.lezcano@linaro.org Link: https://patchwork.kernel.org/patch/9174261/ Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-08-17clocksource/drivers/time-armada-370-xp: Fix the clock referenceGregory CLEMENT1-1/+0
While converting the init function to return an error, the wrong clock was get. This leads to the wrong clock rate and slows down the kernel. For example, it affects typical boot time: - without fix: over 1 minute - with fix: 15 seconds Tested-by: Stefan Roese <sr@denx.de> Tested-by: Ralph Sennhauser <ralph.sennhauser@gmail.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 12549e27c63c ("clocksource/drivers/time-armada-370-xp: Convert init function to return error") Link: http://lkml.kernel.org/r/1471429296-9053-1-git-send-email-daniel.lezcano@linaro.org [ Refined the changelog. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-08-10Merge branch 'linus' into timers/urgent, to pick up fixesIngo Molnar1-1/+1
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-08-01Merge tag 'armsoc-drivers' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC driver updates from Olof Johansson: "Driver updates for ARM SoCs. A slew of changes this release cycle. The reset driver tree, that we merge through arm-soc for historical reasons, is also sizable this time around. Among the changes: - clps711x: Treewide changes to compatible strings, merged here for simplicity. - Qualcomm: SCM firmware driver cleanups, move to platform driver - ux500: Major cleanups, removal of old mach-specific infrastructure. - Atmel external bus memory driver - Move of brcmstb platform to the rest of bcm - PMC driver updates for tegra, various fixes and improvements - Samsung platform driver updates to support 64-bit Exynos platforms - Reset controller cleanups moving to devm_reset_controller_register() APIs - Reset controller driver for Amlogic Meson - Reset controller driver for Hisilicon hi6220 - ARM SCPI power domain support" * tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (100 commits) ARM: ux500: consolidate base platform files ARM: ux500: move soc_id driver to drivers/soc ARM: ux500: call ux500_setup_id later ARM: ux500: consolidate soc_device code in id.c ARM: ux500: remove cpu_is_u* helpers ARM: ux500: use CLK_OF_DECLARE() ARM: ux500: move l2x0 init to .init_irq mfd: db8500 stop passing around platform data ASoC: ab8500-codec: remove platform data based probe ARM: ux500: move ab8500_regulator_plat_data into driver ARM: ux500: remove unused regulator data soc: raspberrypi-power: add CONFIG_OF dependency firmware: scpi: add CONFIG_OF dependency video: clps711x-fb: Changing the compatibility string to match with the smallest supported chip input: clps711x-keypad: Changing the compatibility string to match with the smallest supported chip pwm: clps711x: Changing the compatibility string to match with the smallest supported chip serial: clps711x: Changing the compatibility string to match with the smallest supported chip irqchip: clps711x: Changing the compatibility string to match with the smallest supported chip clocksource: clps711x: Changing the compatibility string to match with the smallest supported chip clk: clps711x: Changing the compatibility string to match with the smallest supported chip ...
2016-08-01clocksource/arm_arch_timer: Force per-CPU interrupt to be level-triggeredMarc Zyngier1-3/+23
The ARM architected timer produces level-triggered interrupts (this is mandated by the architecture). Unfortunately, a number of device-trees get this wrong, and expose an edge-triggered interrupt. Until now, this wasn't too much an issue, as the programming of the trigger would fail (the corresponding PPI cannot be reconfigured), and the kernel would be happy with this. But we're about to change this, and trust DT a lot if the driver doesn't provide its own trigger information. In that context, the timer breaks badly. While we do need to fix the DTs, there is also some userspace out there (kvmtool) that generates the same kind of broken DT on the fly, and that will completely break with newer kernels. As a safety measure, and to keep buggy software alive as well as buying us some time to fix DTs all over the place, let's check what trigger configuration has been given us by the firmware. If this is not a level configuration, then we know that the DT/ACPI configuration is bust, and we pick some defaults which won't be worse than the existing setup. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Liu Gang <Gang.Liu@nxp.com> Cc: Mark Rutland <marc.rutland@arm.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Wenbin Song <Wenbin.Song@freescale.com> Cc: Mingkai Hu <Mingkai.Hu@freescale.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Michal Simek <michal.simek@xilinx.com> Cc: Jon Hunter <jonathanh@nvidia.com> Cc: arm@kernel.org Cc: bcm-kernel-feedback-list@broadcom.com Cc: linux-arm-kernel@lists.infradead.org Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Ray Jui <rjui@broadcom.com> Cc: "Hou Zhiqiang" <B48286@freescale.com> Cc: Tirumalesh Chalamarla <tchalamarla@cavium.com> Cc: linux-samsung-soc@vger.kernel.org Cc: Yuan Yao <yao.yuan@nxp.com> Cc: Jan Glauber <jglauber@cavium.com> Cc: Gregory Clement <gregory.clement@free-electrons.com> Cc: linux-amlogic@lists.infradead.org Cc: soren.brinkmann@xilinx.com Cc: Rajesh Bhagat <rajesh.bhagat@freescale.com> Cc: Scott Branden <sbranden@broadcom.com> Cc: Duc Dang <dhdang@apm.com> Cc: Kukjin Kim <kgene@kernel.org> Cc: Carlo Caione <carlo@caione.org> Cc: Dinh Nguyen <dinguyen@opensource.altera.com> Link: http://lkml.kernel.org/r/1470045256-9032-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-07-15clocksource/atlas7: Convert to hotplug state machineRichard Cochran1-32/+9
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. Signed-off-by: Richard Cochran <rcochran@linutronix.de> Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Barry Song <baohua@kernel.org> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20160713153338.310333816@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-15clocksource/armada-370-xp: Convert to hotplug state machineRichard Cochran1-30/+11
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. Signed-off-by: Richard Cochran <rcochran@linutronix.de> Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20160713153338.229913786@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
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