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* crypto: sha-mb - remove a bogus NULL checkDan Carpenter2014-11-251-2/+1
| | | | | | | | | | | This can't be NULL and we dereferenced it earlier. Smatch used to ignore these things where the pointer was obviously non-NULL but I've found that sometimes the intention was to check something else so we were maybe missing bugs. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: prefix module autoloading with "crypto-"Kees Cook2014-11-2444-71/+71
| | | | | | | | | | | This prefixes all crypto module loading with "crypto-" so we never run the risk of exposing module auto-loading to userspace via a crypto API, as demonstrated by Mathias Krause: https://lkml.org/lkml/2013/3/4/70 Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* ARM: at91/dt: add trng node to at91sam9g45Boris Brezillon2014-11-201-0/+7
| | | | | | | | | | | Add a DT node for the TRNG (True Random Number Generator) block. Keep this block enabled as it does not depend on any external connection, and thus should be available on all boards. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* crypto: crc32 - Add ARM64 CRC32 hw accelerated moduleYazen Ghannam2014-11-203-0/+282
| | | | | | | | | | | | | | | | This module registers a crc32 algorithm and a crc32c algorithm that use the optional CRC32 and CRC32C instructions in ARMv8. Tested on AMD Seattle. Improvement compared to crc32c-generic algorithm: TCRYPT CRC32C speed test shows ~450% speedup. Simple dd write tests to btrfs filesystem show ~30% speedup. Signed-off-by: Yazen Ghannam <yazen.ghannam@linaro.org> Acked-by: Steve Capper <steve.capper@linaro.org> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linuxHerbert Xu2014-11-12258-2111/+2040
|\ | | | | | | Merging 3.18-rc4 in order to pick up the memzero_explicit helper.
| * Merge tag 'arm64-fixes' of ↵Linus Torvalds2014-11-093-3/+27
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Catalin Marinas: - enable bpf syscall for compat - cpu_suspend fix when checking the idle state type - defconfig update * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: defconfig: update defconfig for 3.18 arm64: compat: Enable bpf syscall arm64: psci: fix cpu_suspend to check idle state type for index
| | * arm64: defconfig: update defconfig for 3.18Will Deacon2014-11-051-2/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch enables a few things missing from our defconfig: - PCI and MSI, including support for the x-gene host controller - BPF JIT - SPI, GPIO and MMC for Seattle - GPIO for x-gene - USB for Juno - RTC It also removes HMC_DRV, which was being built as a module for some reason. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| | * arm64: compat: Enable bpf syscallCatalin Marinas2014-11-051-0/+2
| | | | | | | | | | | | | | | | | | | | | Following the arm32 commit 2d605a302972 (ARM: enable bpf syscall), wire this syscall for arm64 compat as well. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| | * arm64: psci: fix cpu_suspend to check idle state type for indexAmit Daniel Kachhap2014-10-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fix rectifies the psci cpu_suspend implementation to check the PSCI power state parameter type field associated with the requested idle state index. Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
| * | Merge tag 'armsoc-for-rc4' of ↵Linus Torvalds2014-11-096-42/+126
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Olof Johansson: "Another quiet week: - a fix to silence edma probe error on non-supported platforms from Arnd - a fix to enable the PL clock for Parallella, to make mainline usable with the SDK. - a somewhat verbose fix for the PLL clock tree on VF610 - enabling of SD/MMC on one of the VF610-based boards (for testing) - a fix for i.MX where CONFIG_SPI used to be implicitly enabled and now needs to be added to the defconfig instead - another maintainer added for bcm2835: Lee Jones" * tag 'armsoc-for-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: dts: zynq: Enable PL clocks for Parallella dma: edma: move device registration to platform code ARM: dts: vf610: add SD node to cosmic dts MAINTAINERS: update bcm2835 entry ARM: imx: Fix the removal of CONFIG_SPI option ARM: imx: clk-vf610: define PLL's clock tree
| | * | ARM: dts: zynq: Enable PL clocks for ParallellaAndreas Färber2014-11-091-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Parallella board comes with a U-Boot bootloader that loads one of two predefined FPGA bitstreams before booting the kernel. Both define an AXI interface to the on-board Epiphany processor. Enable clocks FCLK0..FCLK3 for the Programmable Logic by default. Otherwise accessing, e.g., the ESYSRESET register freezes the board, as seen with the Epiphany SDK tools e-reset and e-hw-rev, using /dev/mem. Cc: <stable@vger.kernel.org> # 3.17.x Signed-off-by: Andreas Färber <afaerber@suse.de> Acked-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Olof Johansson <olof@lixom.net>
| | * | dma: edma: move device registration to platform codeArnd Bergmann2014-11-061-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The horrible split between the low-level part of the edma support and the dmaengine front-end driver causes problems on multiplatform kernels. This is an attempt to improve the situation slightly by only registering the dmaengine devices that are actually present. Signed-off-by: Arnd Bergmann <arnd@arndb.de> [olof: add missing include of linux/dma-mapping.h] Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Olof Johansson <olof@lixom.net>
| | * | ARM: dts: vf610: add SD node to cosmic dtsOlof Johansson2014-11-051-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Driver has been there since a while back, but the dts never seems to have been updated with the node (nor pinctrl). Do so now. Cc: Matt Porter <mporter@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Olof Johansson <olof@lixom.net>
| | * | Merge tag 'imx-fixes-3.18-2' of ↵Olof Johansson2014-11-0554-329/+265
| | |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into fixes Merge "ARM: imx: fixes for 3.18, 2nd round" from Shawn Guo: "This is the second round of i.MX fixes for 3.18. The clk-vf610 fix is relatively big, because it needs some adaption to the change made by offending commit dc4805c2e78b (ARM: imx: remove ENABLE and BYPASS bits from clk-pllv3 driver). And it should have been sent to you for earlier -rc inclusion, but unfortunately it got delayed for some time because Stefan wasn't aware of my email address change." The i.MX fixes for 3.18, 2nd round: - Fix a regression on Vybrid platform which is caused by commit dc4805c2e78b (ARM: imx: remove ENABLE and BYPASS bits from clk-pllv3 driver), and results in a missing configuration on PLL clocks. - Fix a regression with i.MX defconfig files where CONFIG_SPI option gets lost accidentally. * tag 'imx-fixes-3.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux: (460 commits) ARM: imx: Fix the removal of CONFIG_SPI option ARM: imx: clk-vf610: define PLL's clock tree + Linux 3.18-rc3 Signed-off-by: Olof Johansson <olof@lixom.net>
| | | * | ARM: imx: Fix the removal of CONFIG_SPI optionFabio Estevam2014-11-042-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since 64546e9fe3a5b8c ("ARM: imx_v6_v7_defconfig updates") and commit 0650f855d2e4b0b9 ("ARM: imx_v4_v5_defconfig: Select CONFIG_IMX_WEIM") CONFIG_SPI selection was dropped by savedefconfig for imx_v4_v5_defconfig and imx_v6_v7_defconfig. In order to keep the same behaviour as previous kernel versions and avoid regressions, let's add CONFIG_SPI option back. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
| | | * | ARM: imx: clk-vf610: define PLL's clock treeStefan Agner2014-11-041-42/+92
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | So far, the required PLL's (PLL1/PLL2/PLL5) have been initialized by boot loader and the kernel code defined fixed rates according to those default configurations. Beginning with the USB PLL7 the code started to initialize the PLL's itself (using imx_clk_pllv3). However, since commit dc4805c2e78ba5a22ea1632f3e3e4ee601a1743b (ARM: imx: remove ENABLE and BYPASS bits from clk-pllv3 driver) imx_clk_pllv3 no longer takes care of the ENABLE and BYPASS bits, hence the USB PLL were not configured correctly anymore. This patch not only fixes those USB PLL's, but also makes use of the imx_clk_pllv3 for all PLL's and alignes the code with the PLL support of the i.MX6 series. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
| * | | | Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds2014-11-0824-31/+142
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull MIPS updates from Ralf Baechle: "This weeks' round of MIPS bug fixes for 3.18: - wire up the bpf syscall - fix TLB dump output for R3000 class TLBs - fix strnlen_user return value if no NUL character was found. - fix build with binutils 2.24.51+. While there is no binutils 2.25 release yet, toolchains derived from binutils 2.24.51+ are already in common use. - the Octeon GPIO code forgot to offline GPIO IRQs. - fix build error for XLP. - fix possible BUG assertion with EVA for CMA" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: Fix build with binutils 2.24.51+ MIPS: R3000: Fix debug output for Virtual page number MIPS: Fix strnlen_user() return value in case of overlong strings. MIPS: CMA: Do not reserve memory if not required MIPS: Wire up bpf syscall. MIPS/Xlp: Remove the dead function destroy_irq() to fix build error MIPS: Octeon: Make Octeon GPIO IRQ chip CPU hotplug-aware
| | * | | | MIPS: Fix build with binutils 2.24.51+Manuel Lauss2014-11-0714-17/+118
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Starting with version 2.24.51.20140728 MIPS binutils complain loudly about mixing soft-float and hard-float object files, leading to this build failure since GCC is invoked with "-msoft-float" on MIPS: {standard input}: Warning: .gnu_attribute 4,3 requires `softfloat' LD arch/mips/alchemy/common/built-in.o mipsel-softfloat-linux-gnu-ld: Warning: arch/mips/alchemy/common/built-in.o uses -msoft-float (set by arch/mips/alchemy/common/prom.o), arch/mips/alchemy/common/sleeper.o uses -mhard-float To fix this, we detect if GAS is new enough to support "-msoft-float" command option, and if it does, we can let GCC pass it to GAS; but then we also need to sprinkle the files which make use of floating point registers with the necessary ".set hardfloat" directives. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Cc: Linux-MIPS <linux-mips@linux-mips.org> Cc: Matthew Fortune <Matthew.Fortune@imgtec.com> Cc: Markos Chandras <Markos.Chandras@imgtec.com> Cc: Maciej W. Rozycki <macro@linux-mips.org> Patchwork: https://patchwork.linux-mips.org/patch/8355/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * | | | MIPS: R3000: Fix debug output for Virtual page numberIsamu Mogi2014-11-061-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Virtual page number of R3000 in entryhi is 20 bit from MSB. But in dump_tlb(), the bit mask to read it from entryhi is 19 bit (0xffffe000). The patch fixes that to 0xfffff000. Signed-off-by: Isamu Mogi <isamu@leafytree.jp> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8290/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * | | | MIPS: Fix strnlen_user() return value in case of overlong strings.Ralf Baechle2014-11-041-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We were returning maxlen like the userland strnlen if no '\0' character was encountered while the kernel version is expected to return a value larger than maxlen. Fixed to return maxlen + 1. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * | | | MIPS: CMA: Do not reserve memory if not requiredZubair Lutfullah Kakakhel2014-10-291-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Even if CMA is disabled, the for_each_memblock macro expands to run reserve_bootmem once. Hence, reserve_bootmem attempts to reserve location 0 of size 0. Add a check to avoid that. Issue was highlighted during testing with EVA enabled. resrve_bootmem used to exit gracefully when passed arguments to reserve 0 size location at 0 without EVA. But with EVA enabled, macros would point to different addresses and the code would trigger a BUG. Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> Tested-by: Markos Chandras <markos.chandras@imgtec.com> Tested-by: Huacai Chen <chenhc@lemote.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/8231/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * | | | MIPS: Wire up bpf syscall.Ralf Baechle2014-10-275-6/+13
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * | | | MIPS/Xlp: Remove the dead function destroy_irq() to fix build errorYijing Wang2014-10-271-3/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 465665f78a7 ("mips: Kill pointless destroy_irq()") removed the destroy_irq(). So remove the leftover one in xlp_setup_msix() to fix build error. arch/mips/pci/msi-xlp.c: In function 'xlp_setup_msix': arch/mips/pci/msi-xlp.c:447:3: error: implicit declaration of function 'destroy_irq'.. cc1: some warnings being treated as errors make[1]: *** [arch/mips/pci/msi-xlp.o] Error 1 make: *** [arch/mips/pci/] Error 2 Signed-off-by: Yijing Wang <wangyijing@huawei.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: linux-pci@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Xinwei Hu <huxinwei@huawei.com> Cc: Wuyun <wuyun.wu@huawei.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Russell King <linux@arm.linux.org.uk> Cc: linux-arch@vger.kernel.org Cc: arnab.basu@freescale.com Cc: Bharat.Bhushan@freescale.com Cc: x86@kernel.org Cc: Arnd Bergmann <arnd@arndb.de> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: xen-devel@lists.xenproject.org Cc: Joerg Roedel <joro@8bytes.org> Cc: iommu@lists.linux-foundation.org Cc: linux-mips@linux-mips.org Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Cc: Sebastian Ott <sebott@linux.vnet.ibm.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-ia64@vger.kernel.org Cc: David S. Miller <davem@davemloft.net> Cc: sparclinux@vger.kernel.org Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Liviu Dudau <liviu@dudau.co.uk> Patchwork: https://patchwork.linux-mips.org/patch/8087/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * | | | MIPS: Octeon: Make Octeon GPIO IRQ chip CPU hotplug-awareAlexander Sverdlin2014-10-271-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make Octeon GPIO IRQ chip CPU hotplug-aware Seems that irq_cpu_offline callbacks were forgotten in v1 and v2 CIU GPIO chips. There is such a callback for octeon_irq_chip_ciu2_gpio, covering CIU2 chips. Without this callback GPIO IRQs are not being migrated during core offlining. Patch is tested on Octeon II. Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nsn.com> Cc: David Daney <ddaney.cavm@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8201/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | | | | Merge branch 'for-linus' of ↵Linus Torvalds2014-11-0511-90/+67
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 update from Martin Schwidefsky: "One small improvement for the cputime accounting, two bug fixes and an update for the default configuration files" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/ftrace: add ftrace_graph_is_dead() check s390: update default configuration s390/vdso: fix stack corruption s390/time: use stck clock fast for do_account_vtime
| | * | | | | s390/ftrace: add ftrace_graph_is_dead() checkHeiko Carstens2014-10-281-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add an ftrace_graph_is_dead() check to prepare_ftrace_return() in order to detect an internal ftrace graph error. This allows to prevent further ftrace graph handling and hopefully keeps the kernel alive. This patch is the same like for all other architectures. For unkown reasons s390 was left out. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| | * | | | | s390: update default configurationMartin Schwidefsky2014-10-275-74/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| | * | | | | s390/vdso: fix stack corruptionHeiko Carstens2014-10-274-16/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kernel provided vdso functions do not get a stack frame from the calling function and therefore may not change the stack contents, unless they allocate space on their own. This problem was exposed with 070b7be633dc "s390/vdso: replace stck with stcke" which writes 16 bytes instead of 8 bytes into the stack frame. These additional 8 bytes however were indeed used by the caller (glibc) to save data and therefore this data was corrupted by the vdso code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| | * | | | | s390/time: use stck clock fast for do_account_vtimeMartin Schwidefsky2014-10-271-0/+4
| | |/ / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The last high frequency call site of the STCK instruction is do_account_vtime. Replace it with the faster STCKF instruction. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | | | | Merge branch 'for-linus' of ↵Linus Torvalds2014-11-047-88/+163
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux Pull powerpc fixes from Michael Ellerman: "Some more powerpc fixes if you please" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: powerpc: use device_online/offline() instead of cpu_up/down() powerpc/powernv: Properly fix LPC debugfs endianness powerpc: do_notify_resume can be called with bad thread_info flags argument powerpc/fadump: Fix endianess issues in firmware assisted dump handling powerpc: Fix section mismatch warning
| | * | | | | powerpc: use device_online/offline() instead of cpu_up/down()Dan Streetman2014-11-021-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In powerpc pseries platform dlpar operations, use device_online() and device_offline() instead of cpu_up() and cpu_down(). Calling cpu_up/down() directly does not update the cpu device offline field, which is used to online/offline a cpu from sysfs. Calling device_online/offline() instead keeps the sysfs cpu online value correct. The hotplug lock, which is required to be held when calling device_online/offline(), is already held when dlpar_online/offline_cpu() are called, since they are called only from cpu_probe|release_store(). This patch fixes errors on phyp (PowerVM) systems that have cpu(s) added/removed using dlpar operations; without this patch, the /sys/devices/system/cpu/cpuN/online nodes do not correctly show the online state of added/removed cpus. Signed-off-by: Dan Streetman <ddstreet@ieee.org> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Fixes: 0902a9044fa5 ("Driver core: Use generic offline/online for CPU offline/online") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| | * | | | | powerpc/powernv: Properly fix LPC debugfs endiannessBenjamin Herrenschmidt2014-10-311-0/+59
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Endian is hard, especially when I designed a stupid FW interface, and I should know better... oh well, this is attempt #2 at fixing this properly. This time it seems to work with all access sizes and I can run my flashing tool (which exercises all sort of access sizes and types to access the SPI controller in the BMC) just fine. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: stable@vger.kernel.org Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| | * | | | | powerpc: do_notify_resume can be called with bad thread_info flags argumentAnton Blanchard2014-10-311-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Back in 7230c5644188 ("powerpc: Rework lazy-interrupt handling") we added a call out to restore_interrupts() (written in c) before calling do_notify_resume: bl restore_interrupts addi r3,r1,STACK_FRAME_OVERHEAD bl do_notify_resume Unfortunately do_notify_resume takes two arguments, the second one being the thread_info flags: void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags) We do populate r4 (the second argument) earlier, but restore_interrupts() is free to muck it up all it wants. My guess is the gcc compiler gods shone down on us and its register allocator never used r4. Sometimes, rarely, luck is on our side. LLVM on the other hand did trample r4. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: stable@vger.kernel.org Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| | * | | | | powerpc/fadump: Fix endianess issues in firmware assisted dump handlingHari Bathini2014-10-303-85/+95
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Firmware-assisted dump (fadump) kernel code is not endian safe. The below patch fixes this issue. Tested this patch with upstream kernel. Below output shows crash tool successfully opening LE fadump vmcore. # crash vmlinux vmcore GNU gdb (GDB) 7.6 This GDB was configured as "powerpc64le-unknown-linux-gnu"... KERNEL: vmlinux DUMPFILE: vmcore CPUS: 16 DATE: Wed Dec 31 19:00:00 1969 UPTIME: 00:03:28 LOAD AVERAGE: 0.46, 0.86, 0.41 TASKS: 268 NODENAME: linux-dhr2 RELEASE: 3.17.0-rc5-7-default VERSION: #6 SMP Tue Sep 30 01:06:34 EDT 2014 MACHINE: ppc64le (4116 Mhz) MEMORY: 40 GB PANIC: "Oops: Kernel access of bad area, sig: 11 [#1]" (check log for details) PID: 6223 COMMAND: "bash" TASK: c0000009661b2500 [THREAD_INFO: c000000967ac0000] CPU: 2 STATE: TASK_RUNNING (PANIC) Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> [mpe: Make the comment in pSeries_lpar_hptab_clear() clearer] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| | * | | | | powerpc: Fix section mismatch warningFabian Frederick2014-10-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add __init to MMU_setup() which uses __initdata boot_command_line. Also MMU_setup() is only called from MMU_init(), which is also __init. Warning appeared since commit 3e47d1474c2b. Fixes: 3e47d1474c2b ("powerpc: Remove powerpc specific cmd_line") Signed-off-by: Fabian Frederick <fabf@skynet.be> [mpe: Update changelog] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| * | | | | | Merge branch 'for-linus' of ↵Linus Torvalds2014-11-033-1/+3
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k Pull m68k update from Geert Uytterhoeven. Just wiring up the bpf system call. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k: Wire up bpf
| | * | | | | | m68k: Wire up bpfGeert Uytterhoeven2014-10-273-1/+3
| | | |/ / / / | | |/| | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Alexei Starovoitov <ast@plumgrid.com>
| * | | | | | Merge tag 'armsoc-for-rc3' of ↵Linus Torvalds2014-11-037-48/+44
| |\ \ \ \ \ \ | | | |_|/ / / | | |/| | / / | | |_|_|/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Olof Johansson: "A surprisingly small batch of fixes for -rc3. Suspiciously small, I'd say. Anyway, most of this are a few defconfig updates. Some for omap to deal with kernel binary size (moving ipv6 to module, etc). A larger one for socfpga that refreshes with some churn, but also turns on a few options that makes the newly-added board in my bootfarm usable for testing. OMAP3 will also now warn when booted with legacy (non-DT) boot protocols, hopefully encouraging those who still care about some of those platforms to submit DT support and report bugs where needed. Nothing stops working though, this is just to warn for future deprecation. Beyond this, very few actual bugfixes. A PXA fix for DEBUG_LL boot hangs, a missing terminting entry in a dt_match array on RealView a MTD fix on OMAP with NAND" [ Obviously missed rc3, will make rc4 instead ;) ] * tag 'armsoc-for-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: MAINTAINERS: drop list entry for davinci ARM: OMAP2+: Warn about deprecated legacy booting mode ARM: omap2plus_defconfig: Fix errors with NAND BCH ARM: multi_v7_defconfig: fix support for APQ8084 soc: versatile: Add terminating entry for realview_soc_of_match ARM: ixp4xx: remove compilation warnings in io.h MAINTAINERS: Add Soren as reviewer for Zynq ARM: omap2plus_defconfig: Fix bloat caused by having ipv6 built-in ARM: socfpga_defconfig: Update defconfig for SoCFPGA ARM: pxa: fix hang on startup with DEBUG_LL
| | * | | | Merge tag 'fixes-against-v3.18-rc2' of ↵Olof Johansson2014-11-02142-1486/+1212
| | |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes Merge "omap fixes against v3.18-rc2" from Tony Lindgren: Few fixes for omaps to enable NAND BCH so devices won't produce errors when booted with omap2plus_defconfig, and reduce bloat by making IPV6 a loadable module. Also let's add a warning about legacy boot being deprecated for omap3. We now have things working with device tree, and only omap3 is still booting in legacy mode. So hopefully this warning will help move the remaining legacy mode users to boot with device tree. As the total reduction of code and static data is somewhere around 20000 lines of code once we remove omap3 legacy mode booting, we really do want to make omap3 to boot also in device tree mode only over the next few merge cycles. * tag 'fixes-against-v3.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (407 commits) ARM: OMAP2+: Warn about deprecated legacy booting mode ARM: omap2plus_defconfig: Fix errors with NAND BCH ARM: omap2plus_defconfig: Fix bloat caused by having ipv6 built-in + Linux 3.18-rc2 Signed-off-by: Olof Johansson <olof@lixom.net>
| | | * | | | ARM: OMAP2+: Warn about deprecated legacy booting modeTony Lindgren2014-10-291-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We're moving omaps to use device tree based booting and already have omap2, omap4, omap5, am335x and am437x booting in device tree only mode. Only omap3 still has legacy booting still around and we really want to make that device tree only. So let's add a warning about deprecated legacy booting so we get people to upgrade their boards to use device tree based booting and find out about any remaining issues. Note that for most boards we already have the .dts file and those can be booted with without changing the bootloader using the appended DTB mode. Acked-By: Sebastian Reichel <sre@kernel.org> Reviewed-by: Aaro Koskinen <aaro.koskinen@iki.fi> Reviewed-by: Javier Martinez Canillas <javier@dowhile0.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | | * | | | ARM: omap2plus_defconfig: Fix errors with NAND BCHTony Lindgren2014-10-291-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Looks like we need to have BCH enabled to get NAND working and to avoid getting: nand: error: CONFIG_MTD_NAND_ECC_BCH not enabled Signed-off-by: Tony Lindgren <tony@atomide.com>
| | | * | | | ARM: omap2plus_defconfig: Fix bloat caused by having ipv6 built-inTony Lindgren2014-10-271-2/+1
| | | |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 673ce00c5d6c (ARM: omap2plus_defconfig: Add support for distros with systemd) caused considerable bloat as noted by Paul Walmsley <paul@pwsan.com>. Let's fix this issue by making what we can into loadable modules for the systemd options. That's only IPV6 and AUTOFS4_FS it seems, and IPv6 defaults to a loadable module. Reported-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | | | ARM: multi_v7_defconfig: fix support for APQ8084Srinivas Kandagatla2014-10-281-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch enables configs required to boot IFC6540 board with atleast a serial console. Without this patch there is no serial console. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| | * | | | ARM: ixp4xx: remove compilation warnings in io.hStefan Hengelein2014-10-281-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When arch/arm/mach-ixp4xx/common-pci.c is compiled, two warnings occur: arch/arm/mach-ixp4xx/include/mach/io.h:144: warning: passing argument 1 of '__raw_readb' makes pointer from integer without a cast arch/arm/mach-ixp4xx/include/mach/io.h:79: warning: passing argument 2 of '__raw_writeb' makes pointer from integer without a cast Both functions expect an 'volatile void __iomem *' but get an u32. The 'u32 addr' variable is initialized with the address of an 'volatile void __iomem *' pointer. Passing the pointer directly, avoids the warning and semantics are preserved. This warning was found with vampyr. Signed-off-by: Stefan Hengelein <stefan.hengelein@fau.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
| | * | | | Merge tag 'socfpga_defconfig_for_v3.19' of ↵Olof Johansson2014-10-271-43/+28
| | |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.rocketboards.org/linux-socfpga-next into fixes Merge "SOCFPGA defconfig update" from Dinh Nguyen: Remove extra un-used options in the socfpga_defconfig by doing "make savedefconfig". Along with this commit, add the configs to enable support for most filesystems, add regulator and SRAM support, and time stamps on printk(). * tag 'socfpga_defconfig_for_v3.19' of git://git.rocketboards.org/linux-socfpga-next: ARM: socfpga_defconfig: Update defconfig for SoCFPGA Signed-off-by: Olof Johansson <olof@lixom.net>
| | | * | | | ARM: socfpga_defconfig: Update defconfig for SoCFPGADinh Nguyen2014-10-241-43/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up the socfpga_defconfig file by doing: make socfpga_defconfig make make savedefconfig Then add the following to socfpga_defconfig: CONFIG_SIGNALFD=y CONFIG_REGULATOR=y CONFIG_REGULATOR_FIXED_VOLTAGE=y CONFIG_SRAM=y CONFIG_DEVTMPFS_MOUNT=y CONFIG_CONFIGFS_FS=y CONFIG_PMBUS=y CONFIG_SENSORS_PMBUS=y CONFIG_SENSORS_LTC2978=y CONFIG_SENSORS_LTC2978_REGULATOR=y CONFIG_PRINTK_TIME=y CONFIG_EXT4_FS=y Signed-off-by: Thor Thayer <tthayer@opensource.altera.com> Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> Signed-off-by: Alan Tull <atull@opensource.altera.com> Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
| | * | | | | Merge tag 'fixes-for-v3.18-rc2' of https://github.com/rjarzmik/linux into fixesOlof Johansson2014-10-272-1/+6
| | |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge "arm: pxa: fixes for v3.18-rc2" from Robert Jarzmik: One small fix for a bug triggered by the activation of low level debug code in all pxa variants in v3.17. The fix is a trivial Kconfig value fix for an addressing conflict.
| | | * | | | | ARM: pxa: fix hang on startup with DEBUG_LLRobert Jarzmik2014-10-202-1/+6
| | | |/ / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The commit 2111667b4677 ("ARM: pxa: call debug_ll_io_init for earlyprintk") triggers in the current kernel the attached backtrace on PXA/tosa early in the boot time when DEBUG_LL is enabled. It is due to overlap between uart virtual memory defined in DEBUG_UART_VIRT and mapped by debug_ll_io_init() and peripheral bus mapped by pxa_map_io at the same address, 0xf2100000. As hinted by Arnd, map early virtual memory for low level debug on address 0xf6200000, even if that means 2 virtual mappings will give access to the pxa internal UARTs (FFUART, BTUART, STUART, ...). ------------[ cut here ]------------ kernel BUG at /home/lumag/linux/mm/vmalloc.c:1143! Internal error: Oops - BUG: 0 [#1] PREEMPT ARM Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 3.17.0-00032-g8e0d202-dirty #23 task: c062a5a8 ti: c0620000 task.ti: c0620000 PC is at vm_area_add_early+0x54/0x84 LR is at add_static_vm_early+0xc/0x60 pc : [<c03e1100>] lr : [<c03d9ef4>] psr: 800001d3 sp : c0621f04 ip : c03efa74 fp : c03edf84 r10: c0637e98 r9 : 40000001 r8 : c03da57c r7 : c3ffcfb0 r6 : 00000000 r5 : c3ffcfb0 r4 : 02000000 r3 : c3ffcfd8 r2 : f2100000 r1 : f4000000 r0 : c3ffcfb0 Flags: Nzcv IRQs off FIQs off Mode SVC_32 ISA ARM Segment kernel Control: 00007977 Table: a0004000 DAC: 00000017 Process swapper (pid: 0, stack limit = 0xc06201c8) Stack: (0xc0621f04 to 0xc0622000) 1f00: c3ffcfd8 40000001 c3ffcfd8 c03ee08c c03da570 c03db90c c0637d24 1f20: 00000000 c03ec7cc c066e654 a0700000 000a0700 c03db914 c03db90c c03daf84 1f40: 00000000 000a0000 c0000000 c03ec7cc 000a0700 c0700000 ffff1000 000a3fff 1f60: 00001000 00000007 00000000 c03ec7cc c0008000 c03ed748 c0621fd4 c03d5d18 1f80: 69052d00 a03ec48c 00000000 c03d8ad0 0000006c 00007977 c036c6e8 00000001 1fa0: c0621fd4 c03ed744 c0628000 a0004000 69052d00 a03ec48c 00000000 c03d68d4 1fc0: 00000000 00000000 00000000 00000000 00000000 c03ed748 c0649894 c062801c 1fe0: c03ed744 c062b2f0 a0004000 69052d00 a03ec48c a0008040 00000000 00000000 [<c03e1100>] (vm_area_add_early) from [<c03d9ef4>] (add_static_vm_early+0xc/0x60) [<c03d9ef4>] (add_static_vm_early) from [<c03da570>] (iotable_init.part.6+0xa8/0xb4) [<c03da570>] (iotable_init.part.6) from [<c03db914>] (pxa25x_map_io+0x8/0x24) [<c03db914>] (pxa25x_map_io) from [<c03daf84>] (paging_init+0x744/0x8d8) [<c03daf84>] (paging_init) from [<c03d8ad0>] (setup_arch+0x354/0x608) [<c03d8ad0>] (setup_arch) from [<c03d68d4>] (start_kernel+0xa8/0x3dc) [<c03d68d4>] (start_kernel) from [<a0008040>] (0xa0008040) Code: e5904008 e0811004 e1520001 2a000005 (e7f001f2) ---[ end trace f24b6c88ae00fa9a ]--- Kernel panic - not syncing: Attempted to kill the idle task! ---[ end Kernel panic - not syncing: Attempted to kill the idle task! Cc: <stable@vger.kernel.org> Reported-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Arnd Bergmann <arnd@arndb.de>
| * | | | | | Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds2014-11-025-9/+23
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull ARM fixes from Russell King: - add the new bpf syscall to ARM. - drop a redundant return statement in __iommu_alloc_remap() - fix a performance issue noticed by Thomas Petazzoni with kmap_atomic(). - fix an issue with the L2 cache OF parsing code which caused it to incorrectly print warnings on each boot, and make the warning text more consistent with the rest of the code * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: ARM: 8180/1: mm: implement no-highmem fast path in kmap_atomic_pfn() ARM: 8183/1: l2c: Improve l2c310_of_parse() error message ARM: 8181/1: Drop extra return statement ARM: 8182/1: l2c: Make l2x0_cache_size_of_parse() return 'int' ARM: enable bpf syscall
| | * | | | | | ARM: 8180/1: mm: implement no-highmem fast path in kmap_atomic_pfn()Thomas Petazzoni2014-10-291-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since CONFIG_HIGHMEM got enabled on ARMv5 Kirkwood, we have noticed a very significant drop in networking performance. The test were conducted on an OpenBlocks A7 board. Without this patch, the outgoing performance measured with iperf are: - highmem OFF, TSO OFF 544 Mbit/s - highmem OFF, TSO ON 942 Mbit/s - highmem ON, TSO OFF 306 Mbit/s - highmem ON, TSO ON 246 Mbit/s On this Kirkwood platform, the L2 cache is a Feroceon cache, and with this cache, all the range operations have to be done on virtual addresses and not physical addresses. Therefore, whenever CONFIG_HIGHMEM is enabled, the cache maintenance operations call kmap_atomic_pfn() and kunmap_atomic(). However, kmap_atomic_pfn() does not implement the same fast path for non-highmem pages as the one implemented in kmap_atomic(), and this is one of the reason for the performance drop. While this patch does not fully restore the performances, it clearly improves them a lot: without patch with patch - highmem ON, TSO OFF 306 Mbit/s 387 Mbit/s - highmem ON, TSO ON 246 Mbit/s 434 Mbit/s We're still far from the !CONFIG_HIGHMEM performances, but it does improve a bit the situation. Thanks a lot to Ezequiel Garcia and Gregory Clement for all the testing work around this topic. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>