summaryrefslogtreecommitdiff
path: root/Documentation
AgeCommit message (Collapse)Author
2023-04-11dt-bindings: PCI: qcom: Add "mhi" register region to supported SoCsManivannan Sadhasivam
"mhi" register region contains the MHI registers that could be used by the PCIe controller drivers to get debug information like PCIe link transition counts on newer SoCs. Link: https://lore.kernel.org/r/20230316081117.14288-16-manivannan.sadhasivam@linaro.org Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
2023-04-10net: provide macros for commonly copied lockless queue stop/wake codeJakub Kicinski
A lot of drivers follow the same scheme to stop / start queues without introducing locks between xmit and NAPI tx completions. I'm guessing they all copy'n'paste each other's code. The original code dates back all the way to e1000 and Linux 2.6.19. Smaller drivers shy away from the scheme and introduce a lock which may cause deadlocks in netpoll. Provide macros which encapsulate the necessary logic. The macros do not prevent false wake ups, the extra barrier required to close that race is not worth it. See discussion in: https://lore.kernel.org/all/c39312a2-4537-14b4-270c-9fe1fbb91e89@gmail.com/ Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-04-10docs: net: use C syntax highlight in driver.rstJakub Kicinski
Use syntax highlight, comment out the "..." since they are not valid C. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-04-10docs: net: move the probe and open/close sections of driver.rst upJakub Kicinski
Somehow it feels more right to start from the probe then open, then tx... Much like the lifetime of the driver itself. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-04-10docs: net: reformat driver.rst from a list to sectionsJakub Kicinski
driver.rst had a historical form of list of common problems. In the age os Sphinx and rendered documentation it's better to use the more usual title + text format. This will allow us to render kdoc into the output more naturally. No changes to the actual text. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-04-10Documentation: Add document for false sharingFeng Tang
When doing performance tuning or debugging performance regressions, more and more cases are found to be related to false sharing [1][2][3], and the situation can be worse for newer platforms with hundreds of CPUs. There are already many commits in current kernel specially for mitigating the performance degradation due to false sharing. False sharing could harm the performance silently without being noticed, due to reasons like: * data members of a big data structure randomly sitting together in one cache line * global data of small size are linked compactly together So it's better to make a simple document about the normal pattern of false sharing, basic ways to mitigate it and call out to developers to pay attention during code-writing. [ Many thanks to Dave Hansen, Ying Huang, Tim Chen, Julie Du and Yu Chen for their contributions ] [1]. https://lore.kernel.org/lkml/20220619150456.GB34471@xsang-OptiPlex-9020/ [2]. https://lore.kernel.org/lkml/20201102091543.GM31092@shao2-debian/ [3]. https://lore.kernel.org/lkml/20230307125538.818862491@linutronix.de/ Signed-off-by: Feng Tang <feng.tang@intel.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Reviewed-by: Shakeel Butt <shakeelb@google.com> Link: https://lore.kernel.org/r/20230407041235.37886-1-feng.tang@intel.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-04-10dma-api-howto: typo fixMichael S. Tsirkin
Stumbled upon a typo while reading the doc, here's a fix. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Link: https://lore.kernel.org/r/af1505348a67981f63ccff4e3c3d45b686cda43f.1680864874.git.mst@redhat.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-04-10docs: move m68k architecture documentation under Documentation/arch/Jonathan Corbet
Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Move Documentation/m68k into arch/ and fix all in-tree references. Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-04-10docs: move parisc documentation under Documentation/arch/Jonathan Corbet
Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Move Documentation/parisc into arch/ and fix all in-tree references. Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Helge Deller <deller@gmx.de> Cc: Alex Shi <alexs@kernel.org> Reviewed-by: Yanteng Si <siyanteng@loongson.cn> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-04-10docs: move ia64 architecture docs under Documentation/arch/Jonathan Corbet
Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Move Documentation/ia64 into arch/ and fix all in-tree references. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-04-10docs: Move arc architecture docs under Documentation/arch/Jonathan Corbet
Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Move Documentation/arc into arch/ and fix all in-tree references. Acked-by: Vineet Gupta <vgupta@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2023-04-11dt-bindings: pinctrl: mediatek,mt8365-pinctrl: add drive strength propertyAlexandre Mergnat
This SoC is able to drive the following output current: - 2 mA - 4 mA - 6 mA - 8 mA - 10 mA - 12 mA - 14 mA - 16 mA Then drive-strength property is set with enum to reflect its HW capability. Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com> Link: https://lore.kernel.org/r/20230327-cleanup-pinctrl-binding-v3-3-6f56d5c7a8de@baylibre.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2023-04-11dt-bindings: pinctrl: mediatek: deprecate custom bias pull properties for mt8365Alexandre Mergnat
In order to be more generic, "mediatek,pull-up-adv" and "mediatek,pull-down-adv" should be deprecated. Use "bias-pull-up" and "bias-pull-down" instead. Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://lore.kernel.org/r/20230327-cleanup-pinctrl-binding-v3-2-6f56d5c7a8de@baylibre.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2023-04-11dt-bindings: pinctrl: mediatek: deprecate custom drive strength propertyAlexandre Mergnat
Deprecate mediatek,drive-strength-adv which shall not exist, that was an unnecessary property that leaked upstream from downstream kernels and there's no reason to use it. The generic property drive-strength-microamp should be used instead. Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://lore.kernel.org/r/20230327-cleanup-pinctrl-binding-v3-1-6f56d5c7a8de@baylibre.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2023-04-11dt-bindings: pinctrl: qcom,pmic-gpio: add compatible for pmm8654au-gpioBartosz Golaszewski
Add a new compatible for the GPIO controller on the pm8654au PMIC. It has 12 pins with no holes. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Cc: Linus Walleij <linus.walleij@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20230327125316.210812-13-brgl@bgdev.pl Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2023-04-10dt-bindings: memory-controllers: mediatek,smi-larb: add mt8365Alexandre Mergnat
Add binding description for mediatek,mt8365-smi-larb Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com> Link: https://lore.kernel.org/r/20230407-smi-driver-v2-3-8da6683cdb5c@baylibre.com Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
2023-04-10dt-bindings: memory-controllers: mediatek,smi-common: add mt8365Alexandre Mergnat
Add binding description for mediatek,mt8365-smi-common Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com> Link: https://lore.kernel.org/r/20230407-smi-driver-v2-2-8da6683cdb5c@baylibre.com Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
2023-04-10media: add RealVideo format RV30 and RV40Ming Qian
RealVideo, or also spelled as Real Video, is a suite of proprietary video compression formats developed by RealNetworks - the specific format changes with the version. RealVideo codecs are identified by four-character codes. RV30 and RV40 are RealNetworks' proprietary H.264-based codecs. Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Signed-off-by: Ming Qian <ming.qian@nxp.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-04-10media: add Sorenson Spark video formatMing Qian
Sorenson Spark is an implementation of H.263 for use in Flash Video and Adobe Flash files. Sorenson Spark is an incomplete implementation of H.263. It differs mostly in header structure and ranges of the coefficients. Signed-off-by: Ming Qian <ming.qian@nxp.com> Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-04-10media: dt-bindings: media: mediatek: vcodec: Change the max reg value to 2Yunfei Dong
Need to add racing control register base in device node for mt8195 support inner racing mode. Changing the max reg value from 1 to 2. Adding the description for VDEC_SYS and VDEC_MISC. Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com> Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com> Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> Tested-by: Chen-Yu Tsai <wenst@chromium.org> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-04-10media: dt-bindings: media: mediatek: vcodec: adapt to the 'clock-names' of ↵Yunfei Dong
different platforms mt8195 and mt8192 have different clock numbers, separate 'clock-names' according to compatible name. Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com> Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> Tested-by: Chen-Yu Tsai <wenst@chromium.org> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-04-10media: dt-bindings: media: mediatek: Remove "dma-ranges" property for decoderAllen-KH Cheng
Because the decoder nodes already make use of the iommus property to configure the IOMMU for address translations, having a dma-ranges property makes no sense. In fact, after commit f1ad5338a4d5 ("of: Fix "dma-ranges" handling for bus controllers"), having a dma-ranges property causes IOMMU faults. Remove the dma-ranges property and update the example. Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> Tested-by: Chen-Yu Tsai <wenst@chromium.org> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-04-10media: dt-bindings: media: mediatek: Rename child node names for decoderAllen-KH Cheng
In order to make the names of the child nodes more generic, we rename "vcodec-lat" and "vcodec-core" to "video-codec" for decoder in patternProperties and example. Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> Tested-by: Chen-Yu Tsai <wenst@chromium.org> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-04-10dt-bindings: iio: light: Support ROHM BU27034Matti Vaittinen
ROHM BU27034 is an ambient light sesnor with 3 channels and 3 photo diodes capable of detecting a very wide range of illuminance. Typical application is adjusting LCD and backlight power of TVs and mobile phones. Add dt-bindings. Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/66a222574176ee2adbfccf6d9a591c04571a18d9.1680263956.git.mazziesaccount@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2023-04-10doc: Make sysfs-bus-iio doc more exactMatti Vaittinen
A few IIC channel descriptions explained used units as: data is in foo "that can be processed into an" [unit] value. The "can be processed into" is quite broad statement as it does not really explain what this processing means. This makes units pretty much useless. After discussion with Jonathan, it seems the units for these channels should also be well-defined as for all other channels. The processing means the standard scale and offset application that is used throughout the IIO. Let's make it more obvious by stating that the units are [unit] after scale ane offset are applied. Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com> Link: https://lore.kernel.org/r/41eafb0caa510cddf650cf5ff940639a184f3005.1677331779.git.mazziesaccount@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2023-04-10dt-bindings: iio: temperature: ltc2983: Make 'adi,custom-thermocouple' signedRob Herring
The 'adi,custom-thermocouple' property is signed based on the example and driver, so it's type should be int64-matrix rather than uint64-matrix. Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230404205014.644336-2-robh@kernel.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2023-04-10dt-bindings: iio: temperature: ltc2983: Fix child node unevaluated propertiesRob Herring
The child node schemas are missing 'unevaluatedProperties' constraints, so any unknown properties are allowed. The current structure with multiple patternProperties schemas doesn't work for unevaluatedProperties as each sub-schema is evaluated independently. To fix this, move the sub-schema for all child nodes to a $defs entry and reference it from each named child node. Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230404205014.644336-1-robh@kernel.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2023-04-10dt-bindings: iio: st-sensors: Fix repeated textLinus Walleij
The description oddly contains a copy of the initial paragraph. Let's not repeat ourselves. Suggested-by: Diederik de Haas <didi.debian@cknow.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20230329074614.1037625-1-linus.walleij@linaro.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2023-04-10Merge 6.3-rc6 into usb-nextGreg Kroah-Hartman
We need the USB fixes in here for testing, and this resolves two merge conflicts, one pointed out by linux-next: drivers/usb/dwc3/dwc3-pci.c drivers/usb/host/xhci-pci.c Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-04-10Merge 6.3-rc6 into tty-nextGreg Kroah-Hartman
We need the tty/serial fixes in here for testing. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-04-10Merge 6.3-rc6 into char-misc-nextGreg Kroah-Hartman
We need it here to apply other char/misc driver changes to. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-04-09Merge branch 'hwmon-const' of ↵Jakub Kicinski
git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging Pull in pre-requisite patches from Guenter Roeck to constify pointers to hwmon_channel_info. * 'hwmon-const' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: constify pointers to hwmon_channel_info Link: https://lore.kernel.org/all/3a0391e7-21f6-432a-9872-329e298e1582@roeck-us.net/ Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2023-04-09fs/9p: Rework cache modes and add new options to DocumentationEric Van Hensbergen
Switch cache modes to a bit-mask and use legacy cache names as shortcuts. Update documentation to include information on both shortcuts and bitmasks. This patch also fixes missing guards related to fscache. Update the documentation for new mount flags and cache modes. Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>
2023-04-08kcov: improve documentationAndrey Konovalov
Improve KCOV documentation: - Use KCOV instead of kcov, as the former is more widely-used. - Mention Clang in compiler requirements. - Use ``annotations`` for inline code. - Rework remote coverage collection documentation for better clarity. - Various smaller changes. [andreyknvl@google.com: v2] Link: https://lkml.kernel.org/r/583f41c49eef15210fa813e8229730d11427efa7.1677614637.git.andreyknvl@google.com [andreyknvl@google.com: fix ``annotation`` for KCOV_REMOTE_ENABLE] Link: https://lkml.kernel.org/r/72be5c215c275f35891229b90622ed859f196a46.1677684837.git.andreyknvl@google.com Link: https://lkml.kernel.org/r/0b5efd70e31bba7912cf9a6c951f0e76a8df27df.1677517724.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Reviewed-by: Dmitry Vyukov <dvyukov@google.com> Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Marco Elver <elver@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-04-08delayacct: improve the average delay precision of getdelay tool to microsecondWang Yong
Improve the average delay precision of getdelay tool to microsecond. When using the getdelay tool, it is sometimes found that the average delay except CPU is not 0, but display is 0, because the precison is too low. For example, see delay average of SWAP below when using ZRAM. print delayacct stats ON PID 32915 CPU count real total virtual total delay total delay average 339202 2793871936 9233585504 7951112 0.000ms IO count delay total delay average 41 419296904 10ms SWAP count delay total delay average 242589 1045792384 0ms This wrong display is misleading, so improve the millisecond precision of the average delay to microsecond just like CPU. Then user would get more accurate information of delay time. Link: https://lkml.kernel.org/r/202302131408087983857@zte.com.cn Signed-off-by: Wang Yong <wang.yong12@zte.com.cn> Reviewed-by: Yang Yang <yang.yang29@zte.com.cn> Cc: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-04-08Merge tag 'tty-6.3-rc6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial driver fixes from Greg KH: "Here are some small tty and serial driver fixes for some reported problems: - fsl_uart driver bugfixes - sh-sci serial driver bugfixes - renesas serial driver DT binding bugfixes - 8250 DMA bugfix All of these have been in linux-next for a while with no reported problems" * tag 'tty-6.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: tty: serial: sh-sci: Fix Rx on RZ/G2L SCI tty: serial: fsl_lpuart: fix crash in lpuart_uport_is_active tty: serial: fsl_lpuart: avoid checking for transfer complete when UARTCTRL_SBK is asserted in lpuart32_tx_empty serial: 8250: Prevent starting up DMA Rx on THRI interrupt dt-bindings: serial: renesas,scif: Fix 4th IRQ for 4-IRQ SCIFs tty: serial: sh-sci: Fix transmit end interrupt handler
2023-04-08Merge tag 'mm-hotfixes-stable-2023-04-07-16-23' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM fixes from Andrew Morton: "28 hotfixes. 23 are cc:stable and the other five address issues which were introduced during this merge cycle. 20 are for MM and the remainder are for other subsystems" * tag 'mm-hotfixes-stable-2023-04-07-16-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (28 commits) maple_tree: fix a potential concurrency bug in RCU mode maple_tree: fix get wrong data_end in mtree_lookup_walk() mm/swap: fix swap_info_struct race between swapoff and get_swap_pages() nilfs2: fix sysfs interface lifetime mm: take a page reference when removing device exclusive entries mm: vmalloc: avoid warn_alloc noise caused by fatal signal nilfs2: initialize "struct nilfs_binfo_dat"->bi_pad field nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread() zsmalloc: document freeable stats zsmalloc: document new fullness grouping fsdax: force clear dirty mark if CoW mm/hugetlb: fix uffd wr-protection for CoW optimization path mm: enable maple tree RCU mode by default maple_tree: add RCU lock checking to rcu callback functions maple_tree: add smp_rmb() to dead node detection maple_tree: fix write memory barrier of nodes once dead for RCU mode maple_tree: remove extra smp_wmb() from mas_dead_leaves() maple_tree: fix freeing of nodes in rcu mode maple_tree: detect dead nodes in mas_start() maple_tree: be more cautious about dead nodes ...
2023-04-08Documentation/llvm: Add a note about prebuilt kernel.org toolchainsNathan Chancellor
I recently started uploading prebuilt stable versions of LLVM to kernel.org, which should make building the kernel with LLVM more accessible to maintainers and developers. Link them in the LLVM documentation to make this more visible. Link: https://lore.kernel.org/20230319235619.GA18547@dev-arch.thelio-3990X/ Suggested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Bill Wendling <morbo@google.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2023-04-08irqchip/gicv3: Workaround for NVIDIA erratum T241-FABRIC-4Shanker Donthineni
The T241 platform suffers from the T241-FABRIC-4 erratum which causes unexpected behavior in the GIC when multiple transactions are received simultaneously from different sources. This hardware issue impacts NVIDIA server platforms that use more than two T241 chips interconnected. Each chip has support for 320 {E}SPIs. This issue occurs when multiple packets from different GICs are incorrectly interleaved at the target chip. The erratum text below specifies exactly what can cause multiple transfer packets susceptible to interleaving and GIC state corruption. GIC state corruption can lead to a range of problems, including kernel panics, and unexpected behavior. >From the erratum text: "In some cases, inter-socket AXI4 Stream packets with multiple transfers, may be interleaved by the fabric when presented to ARM Generic Interrupt Controller. GIC expects all transfers of a packet to be delivered without any interleaving. The following GICv3 commands may result in multiple transfer packets over inter-socket AXI4 Stream interface: - Register reads from GICD_I* and GICD_N* - Register writes to 64-bit GICD registers other than GICD_IROUTERn* - ITS command MOVALL Multiple commands in GICv4+ utilize multiple transfer packets, including VMOVP, VMOVI, VMAPP, and 64-bit register accesses." This issue impacts system configurations with more than 2 sockets, that require multi-transfer packets to be sent over inter-socket AXI4 Stream interface between GIC instances on different sockets. GICv4 cannot be supported. GICv3 SW model can only be supported with the workaround. Single and Dual socket configurations are not impacted by this issue and support GICv3 and GICv4." Link: https://developer.nvidia.com/docs/t241-fabric-4/nvidia-t241-fabric-4-errata.pdf Writing to the chip alias region of the GICD_In{E} registers except GICD_ICENABLERn has an equivalent effect as writing to the global distributor. The SPI interrupt deactivate path is not impacted by the erratum. To fix this problem, implement a workaround that ensures read accesses to the GICD_In{E} registers are directed to the chip that owns the SPI, and disable GICv4.x features. To simplify code changes, the gic_configure_irq() function uses the same alias region for both read and write operations to GICD_ICFGR. Co-developed-by: Vikram Sethi <vsethi@nvidia.com> Signed-off-by: Vikram Sethi <vsethi@nvidia.com> Signed-off-by: Shanker Donthineni <sdonthineni@nvidia.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com> (for SMCCC/SOC ID bits) Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230319024314.3540573-2-sdonthineni@nvidia.com
2023-04-07dt-bindings: arm: qcom: document MI01.6 board based on IPQ5332 familyKathiravan T
Document the MI01.6 (Reference Design Platform 468) board based on IPQ5332 family of SoCs. Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20230323093120.20558-2-quic_kathirav@quicinc.com
2023-04-07dt-bindings: crypto: Add Qualcomm Inline Crypto EngineAbel Vesa
Add schema file for new Qualcomm Inline Crypto Engine driver. Signed-off-by: Abel Vesa <abel.vesa@linaro.org> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20230407105029.2274111-2-abel.vesa@linaro.org
2023-04-07dt-bindings: arm: qcom: Document xiaomi,laurel-sprout boardLux Aliaga
Document the Xiaomi Mi A3 (xiaomi-laurel-sprout) smartphone which is based on the Snapdragon 665 SoC. Signed-off-by: Lux Aliaga <they@mint.lgbt> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20230306170817.3806-6-they@mint.lgbt
2023-04-07dt-bindings: arm: qcom: Add QRB2210/QCM2290 and RB1 boardKonrad Dybcio
Document QRB210, a QRB version of QCM2290. Document QTI Robotics RB1 as a QRB2210 device. Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20230403-topic-rb1_qcm-v2-2-dae06f8830dc@linaro.org
2023-04-07dt-bindings: firmware: document Qualcomm QCM2290 SCMKonrad Dybcio
Add a compatible for Qualcomm QCM2290 SCM and add it to the core clock users list. Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20230403-topic-rb1_qcm-v2-1-dae06f8830dc@linaro.org
2023-04-07ASoC: dt-bindings: asahi-kasei,ak4458: fix missing quotes around hashKrzysztof Kozlowski
The yamllint expect comments to start with hash and space ('# '), so quote the description to fix: asahi-kasei,ak4458.yaml:40:30: [error] missing starting space in comment (comments) Reported-by: Rob Herring <robh@kernel.org> Closes: https://lore.kernel.org/all/CAL_JsqJzxQb1g=yVgHduLnYOpk8-Q3jppA1qQT1Ce51_gNWjhg@mail.gmail.com/ Fixes: 009e83b591dd ("ASoC: dt-bindings: ak4458: Convert to dtschema") Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20230407170032.102412-1-krzysztof.kozlowski@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
2023-04-07Merge branch 'ib-qcom-quad-spi' of ↵Bjorn Andersson
https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl into arm64-for-6.4 Merge the support for output-enable/disable in the pinctrl-msm driver, to ensure that bisection across the following SC7180/SC7280 DeviceTree changes result in something electrically sound. Signed-off-by: Bjorn Andersson <andersson@kernel.org>
2023-04-07Merge branch '20230316072940.29137-2-quic_devipriy@quicinc.com' into HEADBjorn Andersson
Merge the IPQ9574 Global Clock Controller Devicetree binding, to make available the clock definitions used in the Devicetree source.
2023-04-07Merge branch '20230316072940.29137-2-quic_devipriy@quicinc.com' into clk-for-6.4Bjorn Andersson
Merge IPQ9574 Global Clock Controller binding through a topic branch to allow it also be introduced in the Devicetree source tree.
2023-04-07dt-bindings: clock: Add ipq9574 clock and reset definitionsDevi Priya
Add clock and reset ID definitions for ipq9574 Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Co-developed-by: Anusha Rao <quic_anusha@quicinc.com> Signed-off-by: Anusha Rao <quic_anusha@quicinc.com> Signed-off-by: Devi Priya <quic_devipriy@quicinc.com> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20230316072940.29137-2-quic_devipriy@quicinc.com
2023-04-07hwmon: constify pointers to hwmon_channel_infoKrzysztof Kozlowski
HWmon core receives an array of pointers to hwmon_channel_info and it does not modify it, thus it can be array of const pointers for safety. This allows drivers to make them also const. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
generated by cgit (git 2.34.1) at 2025-07-19 06:20:01 +0000