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2017-08-14gpio: zynq: Fix kernel doc warningsNava kishore Manne1-2/+3
This patch fixes the kernel doc warnings in the driver. Signed-off-by: Nava kishore Manne <navam@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: zynq: Provided workaround for GPIOSwapna Manupati1-4/+37
This patch provides workaround in the gpio driver for Zynq and ZynqMP Platforms by reading pin value of EMIO banks through DATA register as it was unable to read the value of it from DATA_RO register. Signed-off-by: Swapna Manupati <swapnam@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: zynq: Add support for suspend resumeShubhrajyoti Datta1-3/+79
Add support for suspend resume. Now that we can lose context across a suspend/ resume cycle. Add support for the context restore. Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: Add support for TPS68470 GPIOsRajmohan Mani3-0/+192
This patch adds support for TPS68470 GPIOs. There are 7 GPIOs and a few sensor related GPIOs. These GPIOs can be requested and configured as appropriate. The GPIOs are also provided with descriptive names. However, the typical use case is that the OS GPIO driver will interact with TPS68470 GPIO driver to configure these GPIOs, as requested by the platform firmware. Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: davinci: Handle the return value of davinci_gpio_irq_setup functionKeerthy1-1/+4
Currently davinci_gpio_irq_setup return value is ignored. Handle the return value appropriately. Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14dt-bindings: gpio: davinci: Add keystone-k2g compatibleKeerthy1-2/+89
The patch adds keystone-k2g compatible, specific properties and an example. The patch also adds the details of supported SoCs for each compatible. Signed-off-by: Keerthy <j-keerthy@ti.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: vf610: add imx7ulp supportDong Aisheng1-3/+44
The Rapid General-Purpose Input and Output with 2 Ports (RGPIO2P) on MX7ULP is similar to GPIO on Vibrid. But unlike Vibrid, the RGPIO2P has an extra Port Data Direction Register (PDDR) used to configure the individual port pins for input or output. We introduce a bool have_paddr with fsl_gpio_soc_data data to distinguish this differences. And we support getting the output status by checking the GPIO direction in PDDR. Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Stefan Agner <stefan@agner.ch> Cc: Fugang Duan <fugang.duan@nxp.com> Cc: Peter Chen <peter.chen@nxp.com> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: msic: fix error return code in platform_msic_gpio_probe()Gustavo A. R. Silva1-2/+2
platform_get_irq() returns an error code, but the gpio-msic driver ignores it and always returns -EINVAL. This is not correct, and prevents -EPROBE_DEFER from being propagated properly. Notice that platform_get_irq() no longer returns 0 on error: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af Print and propagate the return value of platform_get_irq on failure. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: omap : Add missing clk_unprepare().Arvind Yadav1-0/+2
omap_gpio_probe() can fail here and we must disable clock. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: mb86s7x: Handle return value of clk_prepare_enable.Arvind Yadav1-1/+3
clk_prepare_enable() can fail here and we must check its return value. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: it87: add support for IT8772F Super I/O.Diego Elio Pettenò1-0/+3
From the datasheet, the GPIO interface is identical to IT8728 (same description), so just add it to the same case as the other chip. Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.eu> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: tegra: Use unsigned int where possibleThierry Reding1-32/+24
In most of the cases, integers in this file can't be negative, so the type can be more restricted for clarity. Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: tegra: Fix checkpatch warningsThierry Reding1-12/+20
Fix a couple of checkpatch warnings, such as complaints about bare unsigned being used (instead of unsigned int) and missing blank lines after declarations. Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: tegra: Prefer kcalloc() over kzalloc() with multipliesThierry Reding1-2/+2
Rather than manually compute the size of an array, pass the number and element size to kcalloc(). Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: tegra: Remove unnecessary checkThierry Reding1-9/+2
of_device_get_match_data() can never return NULL, therefore the check for NULL values is unnecessary. Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: Use unsigned int for of_gpio_n_cellsThierry Reding1-1/+1
The cell count for GPIO specifiers can never be negative, so make the field unsigned. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14docs: driver-api: Add GPIO sectionThierry Reding2-0/+46
This adds a section about the various parts of the GPIO subsystem to the driver API documentation. Note that this isn't exhaustive documentation, but rather focusses on pulling in the kerneldoc from various sources, in order to improve coverage of kerneldoc processing. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: sysfs: Fixup kerneldocThierry Reding1-4/+4
Fix up some references to parameters to match the code. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: acpi: Fixup kerneldocThierry Reding1-2/+2
Fix up a parameter description to match the code and fix markup for a constant to prettify output. Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: devres: Improve kerneldocThierry Reding1-0/+3
Add missing descriptions for some parameters to match the code. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: of: Improve kerneldocThierry Reding2-4/+22
Add descriptions for missing fields and fix up some parameter references to match the code. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: Cleanup kerneldocThierry Reding2-24/+61
Some kerneldoc has become stale or wasn't quite correct from the outset. Fix up the most serious issues to silence warnings when building the documentation. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: tegra: Use platform_get_irq()Thierry Reding1-5/+5
Instead of using platform_get_resource() and getting the interrupts from the resource, use platform_get_irq() which is slightly easier to use and covers some special cases that the former doesn't. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: tegra: Use platform_irq_count()Thierry Reding1-7/+6
Use platform_irq_count() instead of open-coding the same code sequence. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: Convert to using %pOF instead of full_nameRob Herring10-35/+31
Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Tien Hock Loh <thloh@altera.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Brian Norris <computersforpeace@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: bcm-kernel-feedback-list@broadcom.com Cc: Michal Simek <michal.simek@xilinx.com> Cc: "Sören Brinkmann" <soren.brinkmann@xilinx.com> Cc: linux-gpio@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Acked-by: Gregory Fong <gregory.0xf0@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: davinci: Convert prinkt to dev_errKeerthy1-2/+1
In case of devm_clk_get failure use dev_err instead of printk Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: davinci: Use devm_gpiochip_add_data in place of gpiochip_add_dataKeerthy1-2/+12
Use the devm version of gpiochip_add_data and pass on the return value. This avoids memory leak due to gpiochip_add_data in case the driver is unbound. Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: altera-a10sr: constify gpio_chip structureGustavo A. R. Silva1-1/+1
This structure is only used to copy into another structure, so declare it as const. This issue was detected using Coccinelle and the following semantic patch: @r disable optional_qualifier@ identifier i; position p; @@ static struct gpio_chip i@p = { ... }; @ok@ identifier r.i; expression e; position p; @@ e = i@p; @bad@ position p != {r.p,ok.p}; identifier r.i; struct gpio_chip e; @@ e@i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct gpio_chip i = { ... }; In the following log you can see a significant difference in the code size and data segment, hence in the dec segment. This log is the output of the size command, before and after the code change: before: text data bss dec hex filename 1954 600 0 2554 9fa drivers/gpio/gpio-altera-a10sr.o after: text data bss dec hex filename 1655 512 0 2167 877 drivers/gpio/gpio-altera-a10sr.o Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Reviewed-by: Thor Thayer <thor.thayer@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14dt-bindings: gpio-vf610: add imx7ulp supportDong Aisheng1-1/+3
The Rapid General-Purpose Input and Output with 2 Ports (RGPIO2P) on MX7ULP is similar to GPIO on Vibrid, except it has an extra Port Data Direction Register (PDDR) used to configure the individual port pins for input or output. Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Stefan Agner <stefan@agner.ch> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: gpio-mxc: gpio_set_wake_irq() use proper return valuesPhilipp Rosenberger1-5/+6
Errors from enable_irq_wake() in gpio_set_wake_irq() were silently ignored. Thus led to the problem that gpio_set_wake_irq() always returned successfully, even if enable_irq_wake() returned an error. Signed-off-by: Philipp Rosenberger <p.rosenberger@linutronix.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: rcar: add gen[123] fallback compatibility stringsSimon Horman2-4/+21
Add fallback compatibility string for R-Car Gen 1, 2 and 3. In the case of Renesas R-Car hardware we know that there are generations of SoCs, f.e. Gen 1 and 2. But beyond that its not clear what the relationship between IP blocks might be. For example, I believe that r8a7790 is older than r8a7791 but that doesn't imply that the latter is a descendant of the former or vice versa. We can, however, by examining the documentation and behaviour of the hardware at run-time observe that the current driver implementation appears to be compatible with the IP blocks on SoCs within a given generation. For the above reasons and convenience when enabling new SoCs a per-generation fallback compatibility string scheme being adopted for drivers for Renesas SoCs. Also deprecate renesas,gpio-rcar as its name is more generic than its implementation. Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: replace __maybe_unused in gpiolib.h with static inlineMasahiro Yamada1-1/+1
In header files, static inline is more commonly used. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: tegra: remove gpio_to_irq() from hw irq handlersGrygorii Strashko1-1/+2
gpio_to_irq() API expected to be used by GPIO consumers and not drivers and there are no guarantee that its gpiolib implementation is irq safe. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: pxa: remove gpio_to_irq() from hw irq handlersGrygorii Strashko1-3/+5
gpio_to_irq() API expected to be used by GPIO consumers and not drivers and there are no guarantee that its gpiolib implementation is irq safe. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpiolib: allow gpio irqchip to map irqs dynamicallyGrygorii Strashko1-23/+6
Now IRQ mappings are always created for all (allowed) GPIOs in gpiochip in gpiochip_irqchip_add_key() which goes against the idea of SPARSE_IRQ and, as result, leads to: - increasing of memory consumption for IRQ descriptors most of which will never ever be used (espessially on platform with a high number of GPIOs). (sizeof(struct irq_desc) == 256 on my tested platforms) - imposibility to use GPIO irqchip APIs by gpio drivers when HW implements GPIO IRQ functionality as IRQ crossbar/router which has only limited number of IRQ outputs (example from [1], all GPIOs can be mapped on only 8 IRQs). Hence, remove static IRQ mapping code from gpiochip_irqchip_add_key() and instead replace irq_find_mapping() with irq_create_mapping() in gpiochip_to_irq(). Also add additional gpiochip_irqchip_irq_valid() calls in gpiochip_to_irq() and gpiochip_irq_map(). After this change gpio2irq mapping will happen the following way when GPIO irqchip APIs are used by gpio driver: - IRQ mappings will be created statically if driver passes first_irq>0 vlaue in gpiochip_irqchip_add_key(). - IRQ mappings will be created dynamically from gpio_to_irq() or of_irq_get(). Tested on am335x-evm and dra72-evm-revc. - dra72-evm-revc: number of created irq mappings decreased from 402 -> 135 Mem savings 267*256 = 68352 (66kB) - am335x-evm: number of created irq mappings decreased from 188 -> 63 Mem savings 125*256 = 32000 (31kB) [1] https://lkml.org/lkml/2017/6/15/428 Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpiolib: request the gpio before querying its directionTimur Tabi1-0/+11
Before querying a GPIO to determine its direction, the GPIO should be formally requested. This allows the GPIO driver to block access to unavailable GPIOs, which makes it easier for some drivers to support sparse GPIO maps. Signed-off-by: Timur Tabi <timur@codeaurora.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-14gpio: pca953x: remove incorrect le16_to_cpu callsAndy Shevchenko1-5/+3
i2c_smbus commands handle the correct byte order for smbus transactions internally. This will currently result in incorrect operation on big endian systems. Suggested-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-08-13Linux 4.13-rc5Linus Torvalds1-1/+1
2017-08-12mtd: blkdevs: Fix mtd block write failureAbhishek Sahu1-0/+1
All the MTD block write requests are failing with following error messages mkfs.ext4 /dev/mtdblock0 print_req_error: I/O error, dev mtdblock0, sector 0 Buffer I/O error on dev mtdblock0, logical block 0, lost async page write The control is going to default case after block write request because of missing return. Fixes: commit 2a842acab109 ("block: introduce new block status code type") Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2017-08-11pnfs/blocklayout: require 64-bit sector_tChristoph Hellwig1-0/+1
The blocklayout code does not compile cleanly for a 32-bit sector_t, and also has no reliable checks for devices sizes, which makes it unsafe to use with a kernel that doesn't support large block devices. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Arnd Bergmann <arnd@arndb.de> Fixes: 5c83746a0cf2 ("pnfs/blocklayout: in-kernel GETDEVICEINFO XDR parsing") Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2017-08-11iommu/arm-smmu: fix null-pointer dereference in arm_smmu_add_deviceArtem Savkov1-0/+7
Commit c54451a "iommu/arm-smmu: Fix the error path in arm_smmu_add_device" removed fwspec assignment in legacy_binding path as redundant which is wrong. It needs to be updated after fwspec initialisation in arm_smmu_register_legacy_master() as it is dereferenced later. Without this there is a NULL-pointer dereference panic during boot on some hosts. Signed-off-by: Artem Savkov <asavkov@redhat.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2017-08-11xen/events: Fix interrupt lost during irq_disable and irq_enableLiu Shuo1-1/+1
Here is a device has xen-pirq-MSI interrupt. Dom0 might lost interrupt during driver irq_disable/irq_enable. Here is the scenario, 1. irq_disable -> disable_dynirq -> mask_evtchn(irq channel) 2. dev interrupt raised by HW and Xen mark its evtchn as pending 3. irq_enable -> startup_pirq -> eoi_pirq -> clear_evtchn(channel of irq) -> clear pending status 4. consume_one_event process the irq event without pending bit assert which result in interrupt lost once 5. No HW interrupt raising anymore. Now use enable_dynirq for enable_pirq of xen_pirq_chip to remove eoi_pirq when irq_enable. Signed-off-by: Liu Shuo <shuo.a.liu@intel.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-08-11xen: avoid deadlock in xenbusJuergen Gross1-1/+2
When starting the xenwatch thread a theoretical deadlock situation is possible: xs_init() contains: task = kthread_run(xenwatch_thread, NULL, "xenwatch"); if (IS_ERR(task)) return PTR_ERR(task); xenwatch_pid = task->pid; And xenwatch_thread() does: mutex_lock(&xenwatch_mutex); ... event->handle->callback(); ... mutex_unlock(&xenwatch_mutex); The callback could call unregister_xenbus_watch() which does: ... if (current->pid != xenwatch_pid) mutex_lock(&xenwatch_mutex); ... In case a watch is firing before xenwatch_pid could be set and the callback of that watch unregisters a watch, then a self-deadlock would occur. Avoid this by setting xenwatch_pid in xenwatch_thread(). Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-08-11xen: fix hvm guest with kaslr enabledJuergen Gross1-2/+14
A Xen HVM guest running with KASLR enabled will die rather soon today because the shared info page mapping is using va() too early. This was introduced by commit a5d5f328b0e2baa5ee7c119fd66324eb79eeeb66 ("xen: allocate page for shared info page from low memory"). In order to fix this use early_memremap() to get a temporary virtual address for shared info until va() can be used safely. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-08-11xen: split up xen_hvm_init_shared_info()Juergen Gross1-21/+24
Instead of calling xen_hvm_init_shared_info() on boot and resume split it up into a boot time function searching for the pfn to use and a mapping function doing the hypervisor mapping call. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-08-11x86: provide an init_mem_mapping hypervisor hookJuergen Gross2-0/+13
Provide a hook in hypervisor_x86 called after setting up initial memory mapping. This is needed e.g. by Xen HVM guests to map the hypervisor shared info page. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-08-11fuse: set mapping error in writepage_locked when it failsJeff Layton1-0/+1
This ensures that we see errors on fsync when writeback fails. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2017-08-10userfaultfd: replace ENOSPC with ESRCH in case mm has gone during copy/zeropageMike Rapoport1-2/+2
When the process exit races with outstanding mcopy_atomic, it would be better to return ESRCH error. When such race occurs the process and it's mm are going away and returning "no such process" to the uffd monitor seems better fit than ENOSPC. Link: http://lkml.kernel.org/r/1502111545-32305-1-git-send-email-rppt@linux.vnet.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Suggested-by: Michal Hocko <mhocko@suse.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com> Cc: Pavel Emelyanov <xemul@virtuozzo.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-10zram: rework copy of compressor name in comp_algorithm_store()Matthias Kaehlcke1-2/+2
comp_algorithm_store() passes the size of the source buffer to strlcpy() instead of the destination buffer size. Make it explicit that the two buffers have the same size and use strcpy() instead of strlcpy(). The latter can be done safely since the function ensures that the string in the source buffer is terminated. Link: http://lkml.kernel.org/r/20170803163350.45245-1-mka@chromium.org Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Acked-by: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-10rmap: do not call mmu_notifier_invalidate_page() under ptlKirill A. Shutemov1-22/+30
MMU notifiers can sleep, but in page_mkclean_one() we call mmu_notifier_invalidate_page() under page table lock. Let's instead use mmu_notifier_invalidate_range() outside page_vma_mapped_walk() loop. [jglisse@redhat.com: try_to_unmap_one() do not call mmu_notifier under ptl] Link: http://lkml.kernel.org/r/20170809204333.27485-1-jglisse@redhat.com Link: http://lkml.kernel.org/r/20170804134928.l4klfcnqatni7vsc@black.fi.intel.com Fixes: c7ab0d2fdc84 ("mm: convert try_to_unmap_one() to use page_vma_mapped_walk()") Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Jérôme Glisse <jglisse@redhat.com> Reported-by: axie <axie@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: "Writer, Tim" <Tim.Writer@amd.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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