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2025-04-07pwm: axi-pwmgen: Let .round_waveform_tohw() signal when request was rounded upUwe Kleine-König
The .round_waveform_tohw() is supposed to return 1 if the requested waveform cannot be implemented by rounding down all parameters. Also adapt the corresponding comment to better describe why the implemented procedure is right. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Tested-by: Trevor Gamblin <tgamblin@baylibre.com> Link: https://lore.kernel.org/r/ba451573f0218d76645f068cec78bd97802cf010.1743844730.git.u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-04-07pwm: stm32: Search an appropriate duty_cycle if period cannot be modifiedUwe Kleine-König
If another channel is already enabled period must not be modified. If the requested period is smaller than this unchangable period the driver is still supposed to search a duty_cycle according to the usual rounding rules. So don't set the duty_cycle to 0 but continue to determine an appropriate value for ccr. Fixes: deaba9cff809 ("pwm: stm32: Implementation of the waveform callbacks") Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Link: https://lore.kernel.org/r/f0c50df31daa3d6069bfa8d7fb3e71fae241b026.1743844730.git.u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-04-07pwm: Let pwm_set_waveform() succeed even if lowlevel driver rounded upUwe Kleine-König
Waveform parameters are supposed to be rounded down to the next value possible for the hardware. However when a requested value is too small, .round_waveform_tohw() is supposed to pick the next bigger value and return 1. Let pwm_set_waveform() behave in the same way. This creates consistency between pwm_set_waveform_might_sleep() with exact=false and pwm_round_waveform_might_sleep() + pwm_set_waveform_might_sleep() with exact=true. The PWM_DEBUG rounding check has to be adapted to only trigger if no uprounding happend. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Tested-by: Trevor Gamblin <tgamblin@baylibre.com> Link: https://lore.kernel.org/r/353dc6ae31be815e41fd3df89c257127ca0d1a09.1743844730.git.u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-04-04pwm: fsl-ftm: Handle clk_get_rate() returning 0Uwe Kleine-König
Considering that the driver doesn't enable the used clocks (and also that clk_get_rate() returns 0 if CONFIG_HAVE_CLK is unset) better check the return value of clk_get_rate() for being non-zero before dividing by it. Fixes: 3479bbd1e1f8 ("pwm: fsl-ftm: More relaxed permissions for updating period") Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Link: https://lore.kernel.org/r/b68351a51017035651bc62ad3146afcb706874f0.1743501688.git.u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-04-04pwm: rcar: Improve register calculationUwe Kleine-König
There were several issues in the function rcar_pwm_set_counter(): - The u64 values period_ns and duty_ns were cast to int on function call which might loose bits on 32 bit architectures. Fix: Make parameters to rcar_pwm_set_counter() u64 - The algorithm divided by the result of a division which looses precision. Fix: Make use of mul_u64_u64_div_u64() - The calculated values were just masked to fit the respective register fields which again might loose bits. Fix: Explicitly check for overlow Implement the respective fixes. A side effect of fixing the 2nd issue is that there is no division by 0 if clk_get_rate() returns 0. Fixes: ed6c1476bf7f ("pwm: Add support for R-Car PWM Timer") Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Link: https://lore.kernel.org/r/ab3dac794b2216cc1cc56d65c93dd164f8bd461b.1743501688.git.u.kleine-koenig@baylibre.com [ukleinek: Added an explicit #include <linux/bitfield.h> to please the 0day build bot] Link: https://lore.kernel.org/oe-kbuild-all/202504031354.VJtxScP5-lkp@intel.com/ Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-04-02pwm: mediatek: Prevent divide-by-zero in pwm_mediatek_config()Josh Poimboeuf
With CONFIG_COMPILE_TEST && !CONFIG_HAVE_CLK, pwm_mediatek_config() has a divide-by-zero in the following line: do_div(resolution, clk_get_rate(pc->clk_pwms[pwm->hwpwm])); due to the fact that the !CONFIG_HAVE_CLK version of clk_get_rate() returns zero. This is presumably just a theoretical problem: COMPILE_TEST overrides the dependency on RALINK which would select COMMON_CLK. Regardless it's a good idea to check for the error explicitly to avoid divide-by-zero. Fixes the following warning: drivers/pwm/pwm-mediatek.o: warning: objtool: .text: unexpected end of section Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Link: https://lore.kernel.org/r/fb56444939325cc173e752ba199abd7aeae3bf12.1742852847.git.jpoimboe@kernel.org [ukleinek: s/CONFIG_CLK/CONFIG_HAVE_CLK/] Fixes: caf065f8fd58 ("pwm: Add MediaTek PWM support") Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Link: https://lore.kernel.org/r/9e78a0796acba3435553ed7db1c7965dcffa6215.1743501688.git.u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-03-10dt-bindings: pwm: imx: Add i.MX93, i.MX94 and i.MX95 supportFrank Li
Add compatible string "fsl,imx93-pwm", "fsl,imx94-pwm" and "fsl,imx95-pwm", which is backward compatible with i.MX7ULP. Set it to fall back to "fsl,imx7ulp-pwm". Signed-off-by: Frank Li <Frank.Li@nxp.com> Acked-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20250306170845.240555-1-Frank.Li@nxp.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-03-09dt-bindings: pwm: rockchip: Add rockchip,rk3528-pwmChukun Pan
Document pwm compatible for rk3528 which is fallback compatible of rk3328-pwm group. Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn> Acked-by: Conor Dooley <conor.dooley@microchip.com> Acked-by: Uwe Kleine-König <ukleinek@kernel.org> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Link: https://lore.kernel.org/r/20250307120004.959980-2-amadeus@jmu.edu.cn Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-03-03pwm: stmpe: Allow to compile as a moduleUwe Kleine-König
pwm-stmpe is the only driver that cannot be built as a module. Add the necessary boilerplate to also make this driver modular. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Link: https://lore.kernel.org/r/20250215143723.636591-2-u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-28pwm: Check for CONFIG_PWM using IS_REACHABLE() in main headerUwe Kleine-König
Preparing CONFIG_PWM becoming tristate the right magic to check for the availability of the pwm functions is using IS_REACHABLE() and not IS_ENABLED(). The latter gives the wrong result for built-in code with CONFIG_PWM=m. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Link: https://lore.kernel.org/r/20250217102504.687916-2-u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-28dt-bindings: pwm: rockchip: Add rockchip,rk3562-pwmKever Yang
The PWM core on Rockchip's RK3562 is the same as the one already included in RK3328. Extend the binding accordingly to allow compatible = "rockchip,rk3562-pwm", "rockchip,rk3328-pwm"; Signed-off-by: Kever Yang <kever.yang@rock-chips.com> Acked-by: Uwe Kleine-König <ukleinek@kernel.org> Acked-by: Rob Herring (Arm) <robh@kernel.org> Link: https://lore.kernel.org/r/20250227111913.2344207-11-kever.yang@rock-chips.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-15pwm: Strengthen dependency for PWM_SIFIVEUwe Kleine-König
Back when the sifive pwm driver was added there was no symbol for sifive SoCs yet. Today there is ARCH_SIFIVE however. Let PWM_SIFIVE depend on that to ensure the driver is only build for platforms where there is a chance that the hardware is available. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Link: https://lore.kernel.org/r/20250127105001.587610-2-u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-15pwm: clps711x: Drop of_match_ptr() usage for .of_match_tableUwe Kleine-König
The pwm-clps711x driver depends on ARCH_CLPS711X || COMPILE_TEST. With the former being an ARCH_MULTI_V4T platform, there is always OF=y when ARCH_CLPS711X=y, so in practise clps711x_pwm_dt_ids[] is always used. (And in the case COMPILE_TEST=y + OF=n this only increases the driver size a bit but still compiles.) So drop the usage of of_match_ptr(). Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20250214163442.192006-2-u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-15pwm: pca9685: Drop ACPI_PTR() and of_match_ptr()Andy Shevchenko
Drop rather useless use of ACPI_PTR() and of_match_ptr(). It also removes the necessity to be dependent acpi.h inclusion. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20250214154031.3395014-1-andriy.shevchenko@linux.intel.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-12pwm: Add support for pwm nexus dt bindingsHerve Codina
Platforms can have a standardized connector/expansion slot that exposes signals like PWMs to expansion boards in an SoC agnostic way. The support for nexus node [1] has been added to handle those cases in commit bd6f2fd5a1d5 ("of: Support parsing phandle argument lists through a nexus node"). This commit introduced of_parse_phandle_with_args_map() to handle nexus nodes in a generic way and the gpio subsystem adopted the support in commit c11e6f0f04db ("gpio: Support gpio nexus dt bindings"). A nexus node allows to remap a phandle list in a consumer node through a connector node in a generic way. With this remapping supported, the consumer node needs to knwow only about the nexus node. Resources behind the nexus node are decoupled by the nexus node itself. This is particularly useful when this consumer is described in a device-tree overlay. Indeed, to have the exact same overlay reused with several base systems the overlay needs to known only about the connector is going to be applied to without any knowledge of the SoC (or the component providing the resource) available in the system. As an example, suppose 3 PWMs connected to a connector. The connector PWM 0 and 2 comes from the PWM 1 and 3 of the pwm-controller1. The connector PWM 1 comes from the PWM 4 of the pwm-controller2. An expansion device is connected to the connector and uses the connector PMW 1. Nexus node support in PWM allows the following description: soc { soc_pwm1: pwm-controller1 { #pwm-cells = <3>; }; soc_pwm2: pwm-controller2 { #pwm-cells = <3>; }; }; connector: connector { #pwm-cells = <3>; pwm-map = <0 0 0 &soc_pwm1 1 0 0>, <1 0 0 &soc_pwm2 4 0 0>, <2 0 0 &soc_pwm1 3 0 0>; pwm-map-mask = <0xffffffff 0x0 0x0>; pwm-map-pass-thru = <0x0 0xffffffff 0xffffffff>; }; expansion_device { pwms = <&connector 1 57000 0>; }; >From the expansion device point of view, the PWM requested is the PWM 1 available at the connector regardless of the exact PWM wired to this connector PWM 1. Thanks to nexus node remapping described at connector node, this PWM is the PWM 4 of the pwm-controller2. The nexus node remapping handling consists in handling #pwm-cells, pwm-map, pwm-map-mask and pwm-map-pass-thru properties. This is already supported by of_parse_phandle_with_args_map() thanks to its stem_name parameter. Add support for nexus node device-tree binding and the related remapping in the PWM subsystem by simply using of_parse_phandle_with_args_map() instead of of_parse_phandle_with_args(). [1] https://github.com/devicetree-org/devicetree-specification/blob/v0.4/source/chapter2-devicetree-basics.rst#nexus-nodes-and-specifier-mapping Signed-off-by: Herve Codina <herve.codina@bootlin.com> Link: https://lore.kernel.org/r/20250205095547.536083-3-herve.codina@bootlin.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-12dt-bindings: pwm: Add support for PWM nexus nodeHerve Codina
Platforms can have a standardized connector/expansion slot that exposes PWMs signals to expansion boards. A nexus node [1] allows to remap a phandle list in a consumer node through a connector node in a generic way. With this remapping, the consumer node needs to know only about the nexus node. Resources behind the nexus node are decoupled by the nexus node itself. This is particularly useful when this consumer is described in a device-tree overlay. Indeed, to have the exact same overlay reused with several base systems the overlay needs to known only about the connector is going to be applied to without any knowledge of the SoC (or the component providing the resource) available in the system. As an example, suppose 3 PWMs connected to a connector. The connector PWM 0 and 2 comes from the PWM 1 and 3 of the pwm-controller1. The connector PWM 1 comes from the PWM 4 of the pwm-controller2. An expansion device is connected to the connector and uses the connector PMW 1. Nexus node support in PWM allows the following description: soc { soc_pwm1: pwm-controller1 { #pwm-cells = <3>; }; soc_pwm2: pwm-controller2 { #pwm-cells = <3>; }; }; connector: connector { #pwm-cells = <3>; pwm-map = <0 0 0 &soc_pwm1 1 0 0>, <1 0 0 &soc_pwm2 4 0 0>, <2 0 0 &soc_pwm1 3 0 0>; pwm-map-mask = <0xffffffff 0x0 0x0>; pwm-map-pass-thru = <0x0 0xffffffff 0xffffffff>; }; expansion_device { pwms = <&connector 1 57000 0>; }; >From the expansion device point of view, the PWM requested is the PWM 1 available at the connector regardless of the exact PWM wired to this connector PWM 1. Thanks to nexus node remapping described at connector node, this PWM is the PWM 4 of the pwm-controller2. [1] https://github.com/devicetree-org/devicetree-specification/blob/v0.4/source/chapter2-devicetree-basics.rst#nexus-nodes-and-specifier-mapping Signed-off-by: Herve Codina <herve.codina@bootlin.com> [ukleinek: Make description node use folded style (>) as suggested by Rob] Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://lore.kernel.org/r/20250205095547.536083-2-herve.codina@bootlin.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-10pwm: Add upgrade path to #pwm-cells = <3> for users of of_pwm_single_xlate()Uwe Kleine-König
The PWM chip on PXA only has a single output. Back when the device tree binding was defined it was considered a good idea to not pass the PWM line index as is done for all other PWM types as it would be always zero anyhow and so doesn't add any value. However for consistency reasons it is nice when all PWMs use the same binding. For that reason let of_pwm_single_xlate() (i.e. the function that implements the PXA behaviour) behave in the same way as of_pwm_xlate_with_flags() for 3 (or more) parameters. With that in place, the pxa-pwm binding can be updated to #pwm-cells = <3> without breaking old device trees that stick to #pwm-cells = <1>. Reviewed-by: Herve Codina <herve.codina@bootlin.com> Tested-by: Duje Mihanović <duje.mihanovic@skole.hr> Reviewed-by: Daniel Mack <daniel@zonque.org> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Link: https://lore.kernel.org/r/b33a84d3f073880e94fc303cd32ebe095eb5ce46.1738842938.git.u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-07pwm: gpio: Switch to use hrtimer_setup()Nam Cao
hrtimer_setup() takes the callback function pointer as argument and initializes the timer completely. Replace hrtimer_init() and the open coded initialization of hrtimer::function with the new setup mechanism. Acked-by: Zack Rusin <zack.rusin@broadcom.com> Signed-off-by: Nam Cao <namcao@linutronix.de> Link: https://lore.kernel.org/r/7b7115da84372a49e36a0ac1a5ce553129c3ce0b.1738746904.git.namcao@linutronix.de Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-05pwm: sophgo: add driver for Sophgo SG2042 PWMChen Wang
Add a PWM driver for PWM controller in Sophgo SG2042 SoC. Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Chen Wang <unicorn_wang@outlook.com> Link: https://lore.kernel.org/r/ae8ea1bf0bb0a09336cd8b7f627a994630524bba.1738737617.git.unicorn_wang@outlook.com [ukleinek: Drop unneeded reset_control_assert() from error path] Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-05dt-bindings: pwm: sophgo: add PWM controller for SG2042Chen Wang
Sophgo SG2042 contains a PWM controller, which has 4 channels and can generate PWM waveforms output. Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Chen Wang <unicorn_wang@outlook.com> Link: https://lore.kernel.org/r/d739ea5a1bffcf762248efbe25fae9b9fda6f452.1738737617.git.unicorn_wang@outlook.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-04pwm: lpss: Only include <linux/pwm.h> where neededUwe Kleine-König
Among the three files that include pwm-lpss.h only pwm-lpss.c actually needs <linux/pwm.h>. So move the #include statement from the former to the latter. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Reviewed-by: Andy Shevchenko <andy@kernel.org> Link: https://lore.kernel.org/r/20250123103939.357160-2-u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
2025-02-02Linux 6.14-rc1v6.14-rc1Linus Torvalds
2025-02-02Merge tag 'turbostat-2025.02.02' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux Pull turbostat updates from Len Brown: - Fix regression that affinitized forked child in one-shot mode. - Harden one-shot mode against hotplug online/offline - Enable RAPL SysWatt column by default - Add initial PTL, CWF platform support - Harden initial PMT code in response to early use - Enable first built-in PMT counter: CWF c1e residency - Refuse to run on unsupported platforms without --force, to encourage updating to a version that supports the system, and to avoid no-so-useful measurement results * tag 'turbostat-2025.02.02' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: (25 commits) tools/power turbostat: version 2025.02.02 tools/power turbostat: Add CPU%c1e BIC for CWF tools/power turbostat: Harden one-shot mode against cpu offline tools/power turbostat: Fix forked child affinity regression tools/power turbostat: Add tcore clock PMT type tools/power turbostat: version 2025.01.14 tools/power turbostat: Allow adding PMT counters directly by sysfs path tools/power turbostat: Allow mapping multiple PMT files with the same GUID tools/power turbostat: Add PMT directory iterator helper tools/power turbostat: Extend PMT identification with a sequence number tools/power turbostat: Return default value for unmapped PMT domains tools/power turbostat: Check for non-zero value when MSR probing tools/power turbostat: Enhance turbostat self-performance visibility tools/power turbostat: Add fixed RAPL PSYS divisor for SPR tools/power turbostat: Fix PMT mmaped file size rounding tools/power turbostat: Remove SysWatt from DISABLED_BY_DEFAULT tools/power turbostat: Add an NMI column tools/power turbostat: add Busy% to "show idle" tools/power turbostat: Introduce --force parameter tools/power turbostat: Improve --help output ...
2025-02-02Merge tag 'sh-for-v6.14-tag1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux Pull sh updates from John Paul Adrian Glaubitz: "Fixes and improvements for sh: - replace seq_printf() with the more efficient seq_put_decimal_ull_width() to increase performance when stress reading /proc/interrupts (David Wang) - migrate sh to the generic rule for built-in DTB to help avoid race conditions during parallel builds which can occur because Kbuild decends into arch/*/boot/dts twice (Masahiro Yamada) - replace select with imply in the board Kconfig for enabling hardware with complex dependencies. This addresses warnings which were reported by the kernel test robot (Geert Uytterhoeven)" * tag 'sh-for-v6.14-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux: sh: boards: Use imply to enable hardware with complex dependencies sh: Migrate to the generic rule for built-in DTB sh: irq: Use seq_put_decimal_ull_width() for decimal values
2025-02-02tools/power turbostat: version 2025.02.02Len Brown
Summary of Changes since 2024.11.30: Fix regression in 2023.11.07 that affinitized forked child in one-shot mode. Harden one-shot mode against hotplug online/offline Enable RAPL SysWatt column by default. Add initial PTL, CWF platform support. Harden initial PMT code in response to early use. Enable first built-in PMT counter: CWF c1e residency Refuse to run on unsupported platforms without --force, to encourage updating to a version that supports the system, and to avoid no-so-useful measurement results. Signed-off-by: Len Brown <len.brown@intel.com>
2025-02-01Merge tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds
Pull misc vfs cleanups from Al Viro: "Two unrelated patches - one is a removal of long-obsolete include in overlayfs (it used to need fs/internal.h, but the extern it wanted has been moved back to include/linux/namei.h) and another introduces convenience helper constructing struct qstr by a NUL-terminated string" * tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: add a string-to-qstr constructor fs/overlayfs/namei.c: get rid of include ../internal.h
2025-02-01Merge tag 'mips_6.14_1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux Pull MIPS fix from Thomas Bogendoerfer: "Revert commit breaking sysv ipc for o32 ABI" * tag 'mips_6.14_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: Revert "mips: fix shmctl/semctl/msgctl syscall for o32"
2025-02-01Merge tag 'v6.14-rc-smb3-client-fixes-part2' of ↵Linus Torvalds
git://git.samba.org/sfrench/cifs-2.6 Pull more smb client updates from Steve French: - various updates for special file handling: symlink handling, support for creating sockets, cleanups, new mount options (e.g. to allow disabling using reparse points for them, and to allow overriding the way symlinks are saved), and fixes to error paths - fix for kerberos mounts (allow IAKerb) - SMB1 fix for stat and for setting SACL (auditing) - fix an incorrect error code mapping - cleanups" * tag 'v6.14-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6: (21 commits) cifs: Fix parsing native symlinks directory/file type cifs: update internal version number cifs: Add support for creating WSL-style symlinks smb3: add support for IAKerb cifs: Fix struct FILE_ALL_INFO cifs: Add support for creating NFS-style symlinks cifs: Add support for creating native Windows sockets cifs: Add mount option -o reparse=none cifs: Add mount option -o symlink= for choosing symlink create type cifs: Fix creating and resolving absolute NT-style symlinks cifs: Simplify reparse point check in cifs_query_path_info() function cifs: Remove symlink member from cifs_open_info_data union cifs: Update description about ACL permissions cifs: Rename struct reparse_posix_data to reparse_nfs_data_buffer and move to common/smb2pdu.h cifs: Remove struct reparse_posix_data from struct cifs_open_info_data cifs: Remove unicode parameter from parse_reparse_point() function cifs: Fix getting and setting SACLs over SMB1 cifs: Remove intermediate object of failed create SFU call cifs: Validate EAs for WSL reparse points cifs: Change translation of STATUS_PRIVILEGE_NOT_HELD to -EPERM ...
2025-02-01Merge tag 'driver-core-6.14-rc1-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull debugfs fix from Greg KH: "Here is a single debugfs fix from Al to resolve a reported regression in the driver-core tree. It has been reported to fix the issue" * tag 'driver-core-6.14-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: debugfs: Fix the missing initializations in __debugfs_file_get()
2025-02-01Merge tag 'mm-hotfixes-stable-2025-02-01-03-56' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc fixes from Andrew Morton: "21 hotfixes. 8 are cc:stable and the remainder address post-6.13 issues. 13 are for MM and 8 are for non-MM. All are singletons, please see the changelogs for details" * tag 'mm-hotfixes-stable-2025-02-01-03-56' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (21 commits) MAINTAINERS: include linux-mm for xarray maintenance revert "xarray: port tests to kunit" MAINTAINERS: add lib/test_xarray.c mailmap, MAINTAINERS, docs: update Carlos's email address mm/hugetlb: fix hugepage allocation for interleaved memory nodes mm: gup: fix infinite loop within __get_longterm_locked mm, swap: fix reclaim offset calculation error during allocation .mailmap: update email address for Christopher Obbard kfence: skip __GFP_THISNODE allocations on NUMA systems nilfs2: fix possible int overflows in nilfs_fiemap() mm: compaction: use the proper flag to determine watermarks kernel: be more careful about dup_mmap() failures and uprobe registering mm/fake-numa: handle cases with no SRAT info mm: kmemleak: fix upper boundary check for physical address objects mailmap: add an entry for Hamza Mahfooz MAINTAINERS: mailmap: update Yosry Ahmed's email address scripts/gdb: fix aarch64 userspace detection in get_current_task mm/vmscan: accumulate nr_demoted for accurate demotion statistics ocfs2: fix incorrect CPU endianness conversion causing mount failure mm/zsmalloc: add __maybe_unused attribute for is_first_zpdesc() ...
2025-02-01Merge tag 'media/v6.14-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media fix from Mauro Carvalho Chehab: "A revert for a regression in the uvcvideo driver" * tag 'media/v6.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: Revert "media: uvcvideo: Require entities to have a non-zero unique ID"
2025-02-01MAINTAINERS: include linux-mm for xarray maintenanceAndrew Morton
MM developers have an interest in the xarray code. Cc: David Gow <davidgow@google.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com> Cc: Tamir Duberstein <tamird@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01revert "xarray: port tests to kunit"Andrew Morton
Revert c7bb5cf9fc4e ("xarray: port tests to kunit"). It broke the build when compiing the xarray userspace test harness code. Reported-by: Sidhartha Kumar <sidhartha.kumar@oracle.com> Closes: https://lkml.kernel.org/r/07cf896e-adf8-414f-a629-a808fc26014a@oracle.com Cc: David Gow <davidgow@google.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Tamir Duberstein <tamird@gmail.com> Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01MAINTAINERS: add lib/test_xarray.cTamir Duberstein
Ensure test-only changes are sent to the relevant maintainer. Link: https://lkml.kernel.org/r/20250129-xarray-test-maintainer-v1-1-482e31f30f47@gmail.com Signed-off-by: Tamir Duberstein <tamird@gmail.com> Cc: Mattew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01mailmap, MAINTAINERS, docs: update Carlos's email addressCarlos Bilbao
Update .mailmap to reflect my new (and final) primary email address, carlos.bilbao@kernel.org. Also update contact information in files Documentation/translations/sp_SP/index.rst and MAINTAINERS. Link: https://lkml.kernel.org/r/20250130012248.1196208-1-carlos.bilbao@kernel.org Signed-off-by: Carlos Bilbao <carlos.bilbao@kernel.org> Cc: Carlos Bilbao <bilbao@vt.edu> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mattew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01mm/hugetlb: fix hugepage allocation for interleaved memory nodesRitesh Harjani (IBM)
gather_bootmem_prealloc() assumes the start nid as 0 and size as num_node_state(N_MEMORY). That means in case if memory attached numa nodes are interleaved, then gather_bootmem_prealloc_parallel() will fail to scan few of these nodes. Since memory attached numa nodes can be interleaved in any fashion, hence ensure that the current code checks for all numa node ids (.size = nr_node_ids). Let's still keep max_threads as N_MEMORY, so that it can distributes all nr_node_ids among the these many no. threads. e.g. qemu cmdline ======================== numa_cmd="-numa node,nodeid=1,memdev=mem1,cpus=2-3 -numa node,nodeid=0,cpus=0-1 -numa dist,src=0,dst=1,val=20" mem_cmd="-object memory-backend-ram,id=mem1,size=16G" w/o this patch for cmdline (default_hugepagesz=1GB hugepagesz=1GB hugepages=2): ========================== ~ # cat /proc/meminfo |grep -i huge AnonHugePages: 0 kB ShmemHugePages: 0 kB FileHugePages: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 1048576 kB Hugetlb: 0 kB with this patch for cmdline (default_hugepagesz=1GB hugepagesz=1GB hugepages=2): =========================== ~ # cat /proc/meminfo |grep -i huge AnonHugePages: 0 kB ShmemHugePages: 0 kB FileHugePages: 0 kB HugePages_Total: 2 HugePages_Free: 2 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 1048576 kB Hugetlb: 2097152 kB Link: https://lkml.kernel.org/r/f8d8dad3a5471d284f54185f65d575a6aaab692b.1736592534.git.ritesh.list@gmail.com Fixes: b78b27d02930 ("hugetlb: parallelize 1G hugetlb initialization") Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> Reported-by: Pavithra Prakash <pavrampu@linux.ibm.com> Suggested-by: Muchun Song <muchun.song@linux.dev> Tested-by: Sourabh Jain <sourabhjain@linux.ibm.com> Reviewed-by: Luiz Capitulino <luizcap@redhat.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Donet Tom <donettom@linux.ibm.com> Cc: Gang Li <gang.li@linux.dev> Cc: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01mm: gup: fix infinite loop within __get_longterm_lockedZhaoyang Huang
We can run into an infinite loop in __get_longterm_locked() when collect_longterm_unpinnable_folios() finds only folios that are isolated from the LRU or were never added to the LRU. This can happen when all folios to be pinned are never added to the LRU, for example when vm_ops->fault allocated pages using cma_alloc() and never added them to the LRU. Fix it by simply taking a look at the list in the single caller, to see if anything was added. [zhaoyang.huang@unisoc.com: move definition of local] Link: https://lkml.kernel.org/r/20250122012604.3654667-1-zhaoyang.huang@unisoc.com Link: https://lkml.kernel.org/r/20250121020159.3636477-1-zhaoyang.huang@unisoc.com Fixes: 67e139b02d99 ("mm/gup.c: refactor check_and_migrate_movable_pages()") Signed-off-by: Zhaoyang Huang <zhaoyang.huang@unisoc.com> Reviewed-by: John Hubbard <jhubbard@nvidia.com> Reviewed-by: David Hildenbrand <david@redhat.com> Suggested-by: David Hildenbrand <david@redhat.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Aijun Sun <aijun.sun@unisoc.com> Cc: Alistair Popple <apopple@nvidia.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01mm, swap: fix reclaim offset calculation error during allocationKairui Song
There is a code error that will cause the swap entry allocator to reclaim and check the whole cluster with an unexpected tail offset instead of the part that needs to be reclaimed. This may cause corruption of the swap map, so fix it. Link: https://lkml.kernel.org/r/20250130115131.37777-1-ryncsn@gmail.com Fixes: 3b644773eefd ("mm, swap: reduce contention on device lock") Signed-off-by: Kairui Song <kasong@tencent.com> Cc: Chris Li <chrisl@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01.mailmap: update email address for Christopher ObbardChristopher Obbard
Update my email address. Link: https://lkml.kernel.org/r/20250122-wip-obbardc-update-email-v2-1-12bde6b79ad0@linaro.org Signed-off-by: Christopher Obbard <christopher.obbard@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01kfence: skip __GFP_THISNODE allocations on NUMA systemsMarco Elver
On NUMA systems, __GFP_THISNODE indicates that an allocation _must_ be on a particular node, and failure to allocate on the desired node will result in a failed allocation. Skip __GFP_THISNODE allocations if we are running on a NUMA system, since KFENCE can't guarantee which node its pool pages are allocated on. Link: https://lkml.kernel.org/r/20250124120145.410066-1-elver@google.com Fixes: 236e9f153852 ("kfence: skip all GFP_ZONEMASK allocations") Signed-off-by: Marco Elver <elver@google.com> Reported-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Christoph Lameter <cl@linux.com> Cc: Alexander Potapenko <glider@google.com> Cc: Chistoph Lameter <cl@linux.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01nilfs2: fix possible int overflows in nilfs_fiemap()Nikita Zhandarovich
Since nilfs_bmap_lookup_contig() in nilfs_fiemap() calculates its result by being prepared to go through potentially maxblocks == INT_MAX blocks, the value in n may experience an overflow caused by left shift of blkbits. While it is extremely unlikely to occur, play it safe and cast right hand expression to wider type to mitigate the issue. Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE. Link: https://lkml.kernel.org/r/20250124222133.5323-1-konishi.ryusuke@gmail.com Fixes: 622daaff0a89 ("nilfs2: fiemap support") Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01mm: compaction: use the proper flag to determine watermarksyangge
There are 4 NUMA nodes on my machine, and each NUMA node has 32GB of memory. I have configured 16GB of CMA memory on each NUMA node, and starting a 32GB virtual machine with device passthrough is extremely slow, taking almost an hour. Long term GUP cannot allocate memory from CMA area, so a maximum of 16 GB of no-CMA memory on a NUMA node can be used as virtual machine memory. There is 16GB of free CMA memory on a NUMA node, which is sufficient to pass the order-0 watermark check, causing the __compaction_suitable() function to consistently return true. For costly allocations, if the __compaction_suitable() function always returns true, it causes the __alloc_pages_slowpath() function to fail to exit at the appropriate point. This prevents timely fallback to allocating memory on other nodes, ultimately resulting in excessively long virtual machine startup times. Call trace: __alloc_pages_slowpath if (compact_result == COMPACT_SKIPPED || compact_result == COMPACT_DEFERRED) goto nopage; // should exit __alloc_pages_slowpath() from here We could use the real unmovable allocation context to have __zone_watermark_unusable_free() subtract CMA pages, and thus we won't pass the order-0 check anymore once the non-CMA part is exhausted. There is some risk that in some different scenario the compaction could in fact migrate pages from the exhausted non-CMA part of the zone to the CMA part and succeed, and we'll skip it instead. But only __GFP_NORETRY allocations should be affected in the immediate "goto nopage" when compaction is skipped, others will attempt with DEF_COMPACT_PRIORITY anyway and won't fail without trying to compact-migrate the non-CMA pageblocks into CMA pageblocks first, so it should be fine. After this fix, it only takes a few tens of seconds to start a 32GB virtual machine with device passthrough functionality. Link: https://lore.kernel.org/lkml/1736335854-548-1-git-send-email-yangge1116@126.com/ Link: https://lkml.kernel.org/r/1737788037-8439-1-git-send-email-yangge1116@126.com Signed-off-by: yangge <yangge1116@126.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Barry Song <21cnbao@gmail.com> Cc: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01kernel: be more careful about dup_mmap() failures and uprobe registeringLiam R. Howlett
If a memory allocation fails during dup_mmap(), the maple tree can be left in an unsafe state for other iterators besides the exit path. All the locks are dropped before the exit_mmap() call (in mm/mmap.c), but the incomplete mm_struct can be reached through (at least) the rmap finding the vmas which have a pointer back to the mm_struct. Up to this point, there have been no issues with being able to find an mm_struct that was only partially initialised. Syzbot was able to make the incomplete mm_struct fail with recent forking changes, so it has been proven unsafe to use the mm_struct that hasn't been initialised, as referenced in the link below. Although 8ac662f5da19f ("fork: avoid inappropriate uprobe access to invalid mm") fixed the uprobe access, it does not completely remove the race. This patch sets the MMF_OOM_SKIP to avoid the iteration of the vmas on the oom side (even though this is extremely unlikely to be selected as an oom victim in the race window), and sets MMF_UNSTABLE to avoid other potential users from using a partially initialised mm_struct. When registering vmas for uprobe, skip the vmas in an mm that is marked unstable. Modifying a vma in an unstable mm may cause issues if the mm isn't fully initialised. Link: https://lore.kernel.org/all/6756d273.050a0220.2477f.003d.GAE@google.com/ Link: https://lkml.kernel.org/r/20250127170221.1761366-1-Liam.Howlett@oracle.com Fixes: d24062914837 ("fork: use __mt_dup() to duplicate maple tree in dup_mmap()") Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Jann Horn <jannh@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Peng Zhang <zhangpeng.00@bytedance.com> Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01mm/fake-numa: handle cases with no SRAT infoBruno Faccini
Handle more gracefully cases where no SRAT information is available, like in VMs with no Numa support, and allow fake-numa configuration to complete successfully in these cases Link: https://lkml.kernel.org/r/20250127171623.1523171-1-bfaccini@nvidia.com Fixes: 63db8170bf34 (“mm/fake-numa: allow later numa node hotplug”) Signed-off-by: Bruno Faccini <bfaccini@nvidia.com> Cc: David Hildenbrand <david@redhat.com> Cc: Hyeonggon Yoo <hyeonggon.yoo@sk.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Len Brown <lenb@kernel.org> Cc: "Mike Rapoport (IBM)" <rppt@kernel.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01mm: kmemleak: fix upper boundary check for physical address objectsCatalin Marinas
Memblock allocations are registered by kmemleak separately, based on their physical address. During the scanning stage, it checks whether an object is within the min_low_pfn and max_low_pfn boundaries and ignores it otherwise. With the recent addition of __percpu pointer leak detection (commit 6c99d4eb7c5e ("kmemleak: enable tracking for percpu pointers")), kmemleak started reporting leaks in setup_zone_pageset() and setup_per_cpu_pageset(). These were caused by the node_data[0] object (initialised in alloc_node_data()) ending on the PFN_PHYS(max_low_pfn) boundary. The non-strict upper boundary check introduced by commit 84c326299191 ("mm: kmemleak: check physical address when scan") causes the pg_data_t object to be ignored (not scanned) and the __percpu pointers it contains to be reported as leaks. Make the max_low_pfn upper boundary check strict when deciding whether to ignore a physical address object and not scan it. Link: https://lkml.kernel.org/r/20250127184233.2974311-1-catalin.marinas@arm.com Fixes: 84c326299191 ("mm: kmemleak: check physical address when scan") Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Reported-by: Jakub Kicinski <kuba@kernel.org> Tested-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Cc: Patrick Wang <patrick.wang.shcn@gmail.com> Cc: <stable@vger.kernel.org> [6.0.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01mailmap: add an entry for Hamza MahfoozHamza Mahfooz
Map my previous work email to my current one. Link: https://lkml.kernel.org/r/20250120205659.139027-1-hamzamahfooz@linux.microsoft.com Signed-off-by: Hamza Mahfooz <hamzamahfooz@linux.microsoft.com> Cc: David S. Miller <davem@davemloft.net> Cc: Hans verkuil <hverkuil@xs4all.nl> Cc: Matthieu Baerts <matttbe@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01MAINTAINERS: mailmap: update Yosry Ahmed's email addressYosry Ahmed
Moving to a linux.dev email address. Link: https://lkml.kernel.org/r/20250123231344.817358-1-yosry.ahmed@linux.dev Signed-off-by: Yosry Ahmed <yosry.ahmed@linux.dev> Cc: Chengming Zhou <chengming.zhou@linux.dev> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Nhat Pham <nphamcs@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01scripts/gdb: fix aarch64 userspace detection in get_current_taskJan Kiszka
At least recent gdb releases (seen with 14.2) return SP_EL0 as signed long which lets the right-shift always return 0. Link: https://lkml.kernel.org/r/dcd2fabc-9131-4b48-8419-6444e2d67454@siemens.com Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Barry Song <baohua@kernel.org> Cc: Kieran Bingham <kbingham@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01mm/vmscan: accumulate nr_demoted for accurate demotion statisticsLi Zhijian
In shrink_folio_list(), demote_folio_list() can be called 2 times. Currently stat->nr_demoted will only store the last nr_demoted( the later nr_demoted is always zero, the former nr_demoted will get lost), as a result number of demoted pages is not accurate. Accumulate the nr_demoted count across multiple calls to demote_folio_list(), ensuring accurate reporting of demotion statistics. [lizhijian@fujitsu.com: introduce local nr_demoted to fix nr_reclaimed double counting] Link: https://lkml.kernel.org/r/20250111015253.425693-1-lizhijian@fujitsu.com Link: https://lkml.kernel.org/r/20250110122133.423481-1-lizhijian@fujitsu.com Fixes: f77f0c751478 ("mm,memcg: provide per-cgroup counters for NUMA balancing operations") Signed-off-by: Li Zhijian <lizhijian@fujitsu.com> Acked-by: Kaiyang Zhao <kaiyang2@cs.cmu.edu> Tested-by: Donet Tom <donettom@linux.ibm.com> Reviewed-by: Donet Tom <donettom@linux.ibm.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-02-01ocfs2: fix incorrect CPU endianness conversion causing mount failureHeming Zhao
Commit 23aab037106d ("ocfs2: fix UBSAN warning in ocfs2_verify_volume()") introduced a regression bug. The blksz_bits value is already converted to CPU endian in the previous code; therefore, the code shouldn't use le32_to_cpu() anymore. Link: https://lkml.kernel.org/r/20250121112204.12834-1-heming.zhao@suse.com Fixes: 23aab037106d ("ocfs2: fix UBSAN warning in ocfs2_verify_volume()") Signed-off-by: Heming Zhao <heming.zhao@suse.com> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Jun Piao <piaojun@huawei.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
generated by cgit (git 2.34.1) at 2025-10-01 17:07:38 +0000