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2013-06-20x86, trace: Introduce entering/exiting_irq()Seiji Aguchi
When implementing tracepoints in interrupt handers, if the tracepoints are simply added in the performance sensitive path of interrupt handers, it may cause potential performance problem due to the time penalty. To solve the problem, an idea is to prepare non-trace/trace irq handers and switch their IDTs at the enabling/disabling time. So, let's introduce entering_irq()/exiting_irq() for pre/post- processing of each irq handler. A way to use them is as follows. Non-trace irq handler: smp_irq_handler() { entering_irq(); /* pre-processing of this handler */ __smp_irq_handler(); /* * common logic between non-trace and trace handlers * in a vector. */ exiting_irq(); /* post-processing of this handler */ } Trace irq_handler: smp_trace_irq_handler() { entering_irq(); /* pre-processing of this handler */ trace_irq_entry(); /* tracepoint for irq entry */ __smp_irq_handler(); /* * common logic between non-trace and trace handlers * in a vector. */ trace_irq_exit(); /* tracepoint for irq exit */ exiting_irq(); /* post-processing of this handler */ } If tracepoints can place outside entering_irq()/exiting_irq() as follows, it looks cleaner. smp_trace_irq_handler() { trace_irq_entry(); smp_irq_handler(); trace_irq_exit(); } But it doesn't work. The problem is with irq_enter/exit() being called. They must be called before trace_irq_enter/exit(), because of the rcu_irq_enter() must be called before any tracepoints are used, as tracepoints use rcu to synchronize. As a possible alternative, we may be able to call irq_enter() first as follows if irq_enter() can nest. smp_trace_irq_hander() { irq_entry(); trace_irq_entry(); smp_irq_handler(); trace_irq_exit(); irq_exit(); } But it doesn't work, either. If irq_enter() is nested, it may have a time penalty because it has to check if it was already called or not. The time penalty is not desired in performance sensitive paths even if it is tiny. Signed-off-by: Seiji Aguchi <seiji.aguchi@hds.com> Link: http://lkml.kernel.org/r/51C3238D.9040706@hds.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Steven Rostedt <rostedt@goodmis.org>
2013-06-20tracing: Add DEFINE_EVENT_FN() macroSteven Rostedt
Each TRACE_EVENT() adds several helper functions. If two or more trace events share the same structure and print format, they can also share most of these helper functions and save a lot of space from duplicate code. This is why the DECLARE_EVENT_CLASS() and DEFINE_EVENT() were created. Some events require a trigger to be called at registering and unregistering of the event and to do so they use TRACE_EVENT_FN(). If multiple events require a trigger, they currently have no choice but to use TRACE_EVENT_FN() as there's no DEFINE_EVENT_FN() available. This unfortunately causes a lot of wasted duplicate code created. By adding a DEFINE_EVENT_FN(), these events can still use a DECLARE_EVENT_CLASS() and then define their own triggers. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/51C3236C.8030508@hds.com Signed-off-by: Seiji Aguchi <seiji.aguchi@hds.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-06-20x86, reloc: Use xorl instead of xorq in relocate_kernel_64.SH. Peter Anvin
There is no point in using "xorq" to clear a register... use "xorl" to clear the bottom 32 bits, and the upper 32 bits get cleared by virtue of zero extension. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Cc: Kees Cook <keescook@chromium.org> Link: http://lkml.kernel.org/n/tip-b76zi1gep39c0zs8fbvkhie9@git.kernel.org
2013-06-20Merge tag 'v3.10-rc6' into x86/cleanupsH. Peter Anvin
Linux 3.10-rc6 We need a change that is the mainline tree for further work. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-06-20x86, fpu: Use static_cpu_has_safe before alternativesBorislav Petkov
The call stack below shows how this happens: basically eager_fpu_init() calls __thread_fpu_begin(current) which then does if (!use_eager_fpu()), which, in turn, uses static_cpu_has. And we're executing before alternatives so static_cpu_has doesn't work there yet. Use the safe variant in this path which becomes optimal after alternatives have run. WARNING: at arch/x86/kernel/cpu/common.c:1368 warn_pre_alternatives+0x1e/0x20() You're using static_cpu_has before alternatives have run! Modules linked in: Pid: 0, comm: swapper Not tainted 3.9.0-rc8+ #1 Call Trace: warn_slowpath_common warn_slowpath_fmt ? fpu_finit warn_pre_alternatives eager_fpu_init fpu_init cpu_init trap_init start_kernel ? repair_env_string x86_64_start_reservations x86_64_start_kernel Signed-off-by: Borislav Petkov <bp@suse.de> Link: http://lkml.kernel.org/r/1370772454-6106-6-git-send-email-bp@alien8.de Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-06-20x86: Add a static_cpu_has_safe variantBorislav Petkov
We want to use this in early code where alternatives might not have run yet and for that case we fall back to the dynamic boot_cpu_has. For that, force a 5-byte jump since the compiler could be generating differently sized jumps for each label. Signed-off-by: Borislav Petkov <bp@suse.de> Link: http://lkml.kernel.org/r/1370772454-6106-5-git-send-email-bp@alien8.de Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-06-20x86: Sanity-check static_cpu_has usageBorislav Petkov
static_cpu_has may be used only after alternatives have run. Before that it always returns false if constant folding with __builtin_constant_p() doesn't happen. And you don't want that. This patch is the result of me debugging an issue where I overzealously put static_cpu_has in code which executed before alternatives have run and had to spend some time with scratching head and cursing at the monitor. So add a jump to a warning which screams loudly when we use this function too early. The alternatives patch that check away in conjunction with patching the rest of the kernel image. [ hpa: factored this into its own configuration option. If we want to have an overarching option, it should be an option which selects other options, not as a group option in the source code. ] Signed-off-by: Borislav Petkov <bp@suse.de> Link: http://lkml.kernel.org/r/1370772454-6106-4-git-send-email-bp@alien8.de Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-06-20x86, cpu: Add a synthetic, always true, cpu featureBorislav Petkov
This will be used in alternatives later as an always-replace flag. Signed-off-by: Borislav Petkov <bp@suse.de> Link: http://lkml.kernel.org/r/1370772454-6106-2-git-send-email-bp@alien8.de Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2013-06-20iscsi-target: Remove left over v3.10-rc debug printksNicholas Bellinger
Reported-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-06-20target/iscsi: Fix op=disable + error handling cases in np_store_iserAndy Grover
Writing 0 when iser was not previously enabled, so succeed but do nothing so that user-space code doesn't need a try: catch block when ib_isert logic is not available. Also, return actual error from add_network_portal using PTR_ERR during op=enable failure. Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-06-21Merge branch 'drm-fixes-3.10' of git://people.freedesktop.org/~agd5f/linux ↵Dave Airlie
into drm-fixes One user visible fix to stop misreport GPU hangs and subsequent resets. * 'drm-fixes-3.10' of git://people.freedesktop.org/~agd5f/linux: drm/radeon: update lockup tracking when scheduling in empty ring
2013-06-20ARM: dts: bcm281xx: change comment to C89 styleMatt Porter
CodingStyle does not allow C99 style comments. Since the dts files live in the kernel for now, make this compliant. Signed-off-by: Matt Porter <matt.porter@linaro.org> Acked-by: Christian Daudt <csd@broadcom.com>
2013-06-20ARM: mmc: bcm281xx SDHCI driver (dt mods)Christian Daudt
Add SDHCI bindings for the Broadcom 281xx SoCs. Changes from V2: - Documentation cleanups Changes from V1: - split original patch into 2, one for driver and this one for dt Signed-off-by: Christian Daudt <csd@broadcom.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20Merge branch 'for_3.11/dts' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/bcousson/linux-omap-dt into next/dt From Benoit Cousson: omap devicetree changes for v3.11 merge window - Add mandatory DT support for missing IPs, like USB host, bandgap, LED, NAND, LAN, CPSW, PWM for OMAP and AMXX devices. - Introduce new AM43x silicon. * 'for_3.11/dts' of git://git.kernel.org/pub/scm/linux/kernel/git/bcousson/linux-omap-dt: (52 commits) ARM: dts: omap5-uevm: Provide USB Host PHY clock frequency ARM: dts: omap4-panda: Fix DVI EDID reads ARM: dts: omap4-panda: Add USB Host support ARM: dts: AM43x EPOS EVM support ARM: dts: OMAP5: Add bandgap DT entry ARM: dts: AM33XX: Add pinmux configuration for CPSW to am335x EVM ARM: dts: AM33XX: Add pinmux configuration for CPSW to EVMsk ARM: dts: AM33XX: Add pinmux configuration for CPSW to beaglebone ARM: dts: omap3-overo: Add default trigger for TWL4030 LED ARM: dts: omap3-tobi: Correct polarity for GPIO LED ARM: dts: omap3-tobi: Add SMSC911X node ARM: dts: OMAP3: Include IRQ header ARM: dts: Protect pinctrl headers against multiple inclusions ARM: AM33XX: clock data: Enable clkout2 as part of init ARM: AM33XX: clock: Add debugSS clock nodes ARM: dts: OMAP5: Add Palmas MFD node and regulator nodes ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evmsk ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evm ARM: dts: AM33XX: Add PWMSS device tree nodes ARM: dts: OMAP4460: Add bandgap entry for OMAP4460 devices ... Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Tony Lindgren <tony@atomide.com>
2013-06-20Merge tag 'samsung-defconfig-1' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/soc From Kukjin Kim: update exynos_defconfig - enable GPIO buttons and RTC drivers * tag 'samsung-defconfig-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: exynos_defconfig: Enable GPIO buttons and RTC drivers Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20Merge tag 'remove-nondt-exynos-3' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/soc From Kukjin Kim: cleanup and removing dead code for only support DT for exynos - remove board file for exynos - remove legacy files which are not used anymore - decouple ARCH_EXYNOS from PLAT_S5P * tag 'remove-nondt-exynos-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: (35 commits) ARM: EXYNOS: Remove remaining dead code after non-DT support removal ARM: EXYNOS: Remove legacy L2X0 initialization ARM: EXYNOS: Use exynos_init_io() as map_io callback ARM: EXYNOS: Remove custom init_irq callbacks ARM: EXYNOS: Remove mach/regs-usb-phy.h header thermal: exynos: Support both EXYNOS4X12 SoCs ARM: EXYNOS: Remove unused base addresses from mach/map.h header ARM: EXYNOS: Remove mach/irqs.h header ARM: EXYNOS: Select SPARSE_IRQ for Exynos ARM: SAMSUNG: Make legacy MFC support code depend on SAMSUNG_ATAGS ARM: EXYNOS: Remove mach/regs-gpio.h header ARM: EXYNOS: Remove mach/gpio.h ARM: EXYNOS: Remove setup-i2c0.c ARM: EXYNOS: Do not select legacy Kconfig symbols any more ARM: SAMSUNG: Include most of mach/ headers conditionally ARM: EXYNOS: Decouple ARCH_EXYNOS from PLAT_S5P USB: Check for ARCH_EXYNOS separately platform: Check for ARCH_EXYNOS separately ARM: SAMSUNG: Compile legacy IRQ and GPIO PM code only with ATAGS support ARM: EXYNOS: Provide compatibility stubs for PM code in pm-core.h header ... Conflicts: arch/arm/mach-exynos/Kconfig Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20Merge tag 's3c24xx-pinctrl-2' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/drivers From Kukjin Kim: based on s3c24xx-pinctrl - use correct header for chained_irq functions for s3c24xx-pinctrl * tag 's3c24xx-pinctrl-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: pinctrl: s3c24xx: use correct header for chained_irq functions Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20Merge tag 'common-clk-audio' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/drivers From Kukjin Kim: based on exynos-dt-2 and s3c24xx-dt-2 - use #include for all Samsung DT - add clk for exynos audio subsystem (audss) and i2s - support audss and i2s for exynos5250 * tag 'common-clk-audio' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: clk: exynos5250: Add enum entries for divider clock of i2s1 and i2s2 ARM: dts: Update Samsung I2S documentation ARM: dts: add clock provider information for i2s controllers in Exynos5250 ARM: dts: add Exynos audio subsystem clock controller node clk: samsung: register audio subsystem clocks using common clock framework ARM: dts: use #include for all device trees for Samsung Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20Merge branches 'samsung/exynos-dt2' and 'samsung/s3c24xx-dt2' into next/driversArnd Bergmann
This is the merge base for samsung/common-clk-audio Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20Merge tag 's3c24xx-dt-2' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/dt From Kukjin Kim: based on tags/s3c24xx-dt-1 - update uart addresses in s3c2416-dt auxdata due to removing S3C2410_PA_UARTX * tag 's3c24xx-dt-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: S3C24XX: update uart addresses in s3c2416-dt auxdata Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20Merge tag 'exynos-dt-2' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/dt From Kukjin Kim: 2nd exynos dt update based on tags/exynos-dt-1 - enable RTC on exynos5250 snow and Arndale boards - add support LCD and PWM for exynos4210 Origen board - update bootargs to support 8GiB for exynos5440 SSDK5440 and SD5v1 boards - enable spi and add opp level for exynos5440 - add example doc for samsung-pinctrl dt bindings * tag 'exynos-dt-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: dts: Set BUCK7 as always on for Origen board ARM: dts: Add FIMD node to Origen4210 board ARM: dts: Add LCD related pinctrl entries for exynos4210 ARM: dts: Add PWM related pinctrl entries for exynos4210 Documentation: Add examples to samsung-pinctrl device tree bindings documentation ARM: dts: Enable RTC node for exynos5250-snow ARM: dts: Enable RTC node for Arndale ARM: dts: Removing pdma for exynos5440 ARM: dts: update bootargs to support 8GiB for SSDK5440 and SD5v1 ARM: dts: Add more opp levels in exynos5440 ARM: dts: Add wm8994 regulator support on smdk5250 ARM: dts: enable spi for EXYNOS5440 SOC Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20Merge tag 'exynos-arch-2' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/soc From Kukjin Kim: arch/arm/mach-exynos update - enable XHCI on exynos5 - enable Pinctrl on exynos4 and exynos5 - calling scu_enable() is only available on Cortex-A9 * tag 'exynos-arch-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: EXYNOS: call scu_enable() only in case of cortex-A9 processor ARM: EXYNOS: Select PINCTRL_EXYNOS for exynos4/5 at chip level ARM: EXYNOS: Enable XHCI support on exynos5 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20Merge tag 'omap-for-v3.11/mailbox-signed' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/drivers From Tony Lindgren: Move OMAP Mailbox framework to drivers via Suman Anna <s-anna@ti.com> The OMAP Mailbox driver framework is moved out of arch/arm folder into drivers/mailbox folder, to re-enable building it and also serve as a baseline for adapting to the new mailbox driver framework. The changes mainly contain: - a minor bug fix and cleanup of mach-specific mailbox code - remove any header dependencies from plat-omap for multi-platform support - represent mailbox device data through platform data/hwmod attrs - move the omap mailbox code out of plat-omap/mach-omapX to drivers/mailbox folder * tag 'omap-for-v3.11/mailbox-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: mailbox/omap: move the OMAP mailbox framework to drivers ARM: OMAP2+: add user and fifo info to mailbox platform data ARM: OMAP2+: mbox: remove dependencies with soc.h omap: mailbox: correct the argument type for irq ops omap: mailbox: call request_irq after mbox queues are allocated omap: mailbox: check iomem resource before dereferencing it Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20Merge tag 'omap-for-v3.11/gpmc-part2-signed' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/drivers From Tony Lindgren: GPMC suspend patch that was left out of the earlier omap-for-v3.11/gpmc-signed branch because of a compile error it caused. The compile error is fixed in this version. * tag 'omap-for-v3.11/gpmc-part2-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: OMAP2+: gpmc: Low power transition support Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20Merge tag 'omap-for-v3.11/board-signed' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/boards From Tony Lindgren: Minor board changes for v3.11 merge window. These are tapering down finally as we're getting closer to making omap2+ DT only. * tag 'omap-for-v3.11/board-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: omap2plus_defconfig: enable USB_PHY and NOP_USB_XCEIV ARM: OMAP1: nokia770: enable Tahvo ARM: OMAP3EVM: Marking omap3_evm_display_init() with CONFIG_BROKEN arm: omap: board-overo: reset GPIO for SMSC911x Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20drm/radeon: update lockup tracking when scheduling in empty ringJerome Glisse
There might be issue with lockup detection when scheduling on an empty ring that have been sitting idle for a while. Thus update the lockup tracking data when scheduling new work in an empty ring. Signed-off-by: Jerome Glisse <jglisse@redhat.com> Tested-by: Andy Lutomirski <luto@amacapital.net> Cc: stable@vger.kernel.org Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-06-20ARM: picoxcell: remove .nr_irqs referenceArnd Bergmann
A recent cleanup caused build errors in some configurations because the header defining NR_IRQS_LEGACY is not included here. Since that value is the default, we can just as well leave it out. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Jamie Iles <jamie@jamieiles.com>
2013-06-20Merge branch 'sched-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fixes from Ingo Molnar: "Two smaller fixes - plus a context tracking tracing fix that is a bit bigger" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: tracing/context-tracking: Add preempt_schedule_context() for tracing sched: Fix clear NOHZ_BALANCE_KICK sched/x86: Construct all sibling maps if smt
2013-06-20Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Ingo Molnar: "Four fixes. The mmap ones are unfortunately larger than desired - fuzzing uncovered bugs that needed perf context life time management changes to fix properly" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86: Fix broken PEBS-LL support on SNB-EP/IVB-EP perf: Fix mmap() accounting hole perf: Fix perf mmap bugs kprobes: Fix to free gone and unused optprobes
2013-06-20Merge branch 'core-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull cpu idle fixes from Thomas Gleixner: - Add a missing irq enable. Fallout of the idle conversion - Fix stackprotector wreckage caused by the idle conversion * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: idle: Enable interrupts in the weak arch_cpu_idle() implementation idle: Add the stack canary init to cpu_startup_entry()
2013-06-20Merge branch 'timers-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fixes from Thomas Gleixner: - Fix inconstinant clock usage in virtual time accounting - Fix a build error in KVM caused by the NOHZ work - Remove a pointless timekeeping duty assignment which breaks NOHZ - Use a proper notifier return value to avoid random behaviour * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: tick: Remove useless timekeeping duty attribution to broadcast source nohz: Fix notifier return val that enforce timekeeping kvm: Move guest entry/exit APIs to context_tracking vtime: Use consistent clocks among nohz accounting
2013-06-20Merge branch 'merge' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc fix fro, Benjamin Herrenschmidt: "We accidentally broke hugetlbfs on Freescale embedded processors which use a slightly different page table layout than our server processors" * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc: Fix bad pmd error with book3E config
2013-06-20Merge branch 'stable' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile Pull tilepro fix from Chris Metcalf: "This change allows the older tilepro architecture to be correctly built by newer gccs, despite a change that caused gcc to start trying to use an out-of-line implementation for __builtin_ffsll(). This should be inline again starting with gcc 4.7.4 and 4.8.2 or so, but meanwhile this change keeps things from breaking, with the only cost being a few bytes of code in the kernel to provide __ffsdi2 even for compilers that do inline it" * 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: tilepro: work around module link error with gcc 4.7
2013-06-20Merge tag 'arm64-stable' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64 Pull arm64 perf fix from Catalin Marinas: "Perf fix (user-mode PC recording)" * tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: perf: arm64: Record the user-mode PC in the call chain.
2013-06-20arm64: Add initial DTS for APM X-Gene Storm SOC and APM Mustang boardVinayak Kale
This patch adds initial DTS files required for APM Mustang board. Signed-off-by: Kumar Sankaran <ksankaran@apm.com> Signed-off-by: Loc Ho <lho@apm.com> Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-20arm64: Add defines for APM ARMv8 implementationVinayak Kale
This patch adds defines for APM CPU implementer ID and APM CPU part numbers in asm/cputype.h Signed-off-by: Kumar Sankaran <ksankaran@apm.com> Signed-off-by: Loc Ho <lho@apm.com> Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-20arm64: Enable APM X-Gene SOC family in the defconfigVinayak Kale
This patch enables APM X-Gene SOC family in the defconfig. It also enables 8250 serial driver needed by X-Gene SOC family. Signed-off-by: Kumar Sankaran <ksankaran@apm.com> Signed-off-by: Loc Ho <lho@apm.com> Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-20arm64: Add Kconfig option for APM X-Gene SOC familyVinayak Kale
This patch adds arm64/Kconfig option for APM X-Gene SOC family. Signed-off-by: Kumar Sankaran <ksankaran@apm.com> Signed-off-by: Loc Ho <lho@apm.com> Signed-off-by: Feng Kan <fkan@apm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2013-06-20hw_breakpoint: Introduce "struct bp_cpuinfo"Oleg Nesterov
This patch simply moves all per-cpu variables into the new single per-cpu "struct bp_cpuinfo". To me this looks more logical and clean, but this can also simplify the further potential changes. In particular, I do not think this memory should be per-cpu, it is never used "locally". After this change it is trivial to turn it into, say, bootmem[nr_cpu_ids]. Reported-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/20130620155020.GA6350@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-20hw_breakpoint: Simplify *register_wide_hw_breakpoint()Oleg Nesterov
1. register_wide_hw_breakpoint() can use unregister_ if failure, no need to duplicate the code. 2. "struct perf_event **pevent" adds the unnecesary lever of indirection and complication, use per_cpu(*cpu_events, cpu). Reported-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/20130620155018.GA6347@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-20hw_breakpoint: Introduce cpumask_of_bp()Oleg Nesterov
Add the trivial helper which simply returns cpumask_of() or cpu_possible_mask depending on bp->cpu. Change fetch_bp_busy_slots() and toggle_bp_slot() to always do for_each_cpu(cpumask_of_bp) to simplify the code and avoid the code duplication. Reported-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/20130620155015.GA6340@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-20hw_breakpoint: Simplify the "weight" usage in toggle_bp_slot() pathsOleg Nesterov
Change toggle_bp_slot() to make "weight" negative if !enable. This way we can always use "+ weight" without additional "if (enable)" check and toggle_bp_task_slot() no longer needs this arg. Reported-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/20130620155013.GA6337@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-20hw_breakpoint: Simplify list/idx mess in toggle_bp_slot() pathsOleg Nesterov
The enable/disable logic in toggle_bp_slot() is not symmetrical and imho very confusing. "old_count" in toggle_bp_task_slot() is actually new_count because this bp was already removed from the list. Change toggle_bp_slot() to always call list_add/list_del after toggle_bp_task_slot(). This way old_idx is task_bp_pinned() and this entry should be decremented, new_idx is +/-weight and we need to increment this element. The code/logic looks obvious. Reported-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/20130620155011.GA6330@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-20Merge branch 'perf/urgent' into perf/coreIngo Molnar
Merge in two hw_breakpoint fixes, before applying another 5. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-20hw_breakpoint: Use cpu_possible_mask in {reserve,release}_bp_slot()Oleg Nesterov
fetch_bp_busy_slots() and toggle_bp_slot() use for_each_online_cpu(), this is obviously wrong wrt cpu_up() or cpu_down(), we can over/under account the per-cpu numbers. For example: # echo 0 >> /sys/devices/system/cpu/cpu1/online # perf record -e mem:0x10 -p 1 & # echo 1 >> /sys/devices/system/cpu/cpu1/online # perf record -e mem:0x10,mem:0x10,mem:0x10,mem:0x10 -C1 -a & # taskset -p 0x2 1 triggers the same WARN_ONCE("Can't find any breakpoint slot") in arch_install_hw_breakpoint(). Reported-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/20130620155009.GA6327@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-20hw_breakpoint: Fix cpu check in task_bp_pinned(cpu)Oleg Nesterov
trinity fuzzer triggered WARN_ONCE("Can't find any breakpoint slot") in arch_install_hw_breakpoint() but the problem is not arch-specific. The problem is, task_bp_pinned(cpu) checks "cpu == iter->cpu" but this doesn't account the "all cpus" events with iter->cpu < 0. This means that, say, register_user_hw_breakpoint(tsk) can happily create the arbitrary number > HBP_NUM of breakpoints which can not be activated. toggle_bp_task_slot() is equally wrong by the same reason and nr_task_bp_pinned[] can have negative entries. Simple test: # perl -e 'sleep 1 while 1' & # perf record -e mem:0x10,mem:0x10,mem:0x10,mem:0x10,mem:0x10 -p `pidof perl` Before this patch this triggers the same problem/WARN_ON(), after the patch it correctly fails with -ENOSPC. Reported-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/20130620155006.GA6324@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-06-20Merge branch 'omap/pm-voltdomain-cleanup' into next/socArnd Bergmann
Conflicts: arch/arm/mach-omap2/Makefile arch/arm/mach-omap2/io.c Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20ARM: s5p64x0: avoid build warning for uncompress.hArnd Bergmann
Commit 5336539 "ARM: S5P64X0: Use common uncompress.h part for plat-samsung" was missing a type cast, this brings it in line with the other samsung platforms. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2013-06-20splice: don't pass the address of ->f_pos to methodsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-06-20Merge tag 'samsung-cleanup-1' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/cleanup From Kukjin Kim: - Consolidate uncompress subroutines and s5p64x0-uncompress - Cleanup watchdog support on Samsung to support multiplatform * tag 'samsung-cleanup-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: SAMSUNG: Remove unused plat/regs-watchdog.h header ARM: SAMSUNG: Remove legacy watchdog reset code ARM: SAMSUNG: Let platforms use the new watchdog reset driver ARM: SAMSUNG: Add watchdog reset driver ARM: SAMSUNG: Use local definitions of watchdog registers watchdog: s3c2410_wdt: Use local register definitions ARM: S5P64X0: Use common uncompress.h part for plat-samsung ARM: SAMSUNG: Consolidate uncompress subroutine Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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