In a later commit we'll use dma_alloc_noncoherent() which isn't
stubbed out for builds without CONFIG_DMA_ENGINE and results in the
following build error:
spi-fsl-dspi.c:(.text+0x644): undefined reference to `dma_free_pages'
m68k-linux-ld: spi-fsl-dspi.c:(.text+0x67a): undefined reference to `dma_free_pages'
To continue to support devices that only need XSPI mode and so that
randconfig builds work, stub out DMA functionality in the DSPI driver.
Although older parts of the DMA API have their own stubs, it's
intentional that newer parts don't follow the same pattern. Therefore
individual drivers should not compile in calls unless CONFIG_DMA_ENGINE
is set.
Link: https://lore.kernel.org/oe-kbuild-all/202506160036.t9VDxF6p-lkp@intel.com/
Signed-off-by: James Clark <james.clark@linaro.org>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Message-ID: <20250902-james-nxp-spi-dma-v6-3-f7aa2c5e56e2@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This will allow us to return a status from the interrupt handler in a
later commit and avoids copying it at the end of
dspi_transfer_one_message(). For consistency make polling and DMA modes
use the same mechanism.
No functional changes intended.
Signed-off-by: James Clark <james.clark@linaro.org>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Message-ID: <20250902-james-nxp-spi-dma-v6-2-f7aa2c5e56e2@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Refactor dspi_rxtx() and dspi_poll() to not return -EINPROGRESS because
this isn't actually a status that is ever returned to the core layer but
some internal state. Use true/false return value on dspi_rxtx() for this
instead.
This will help separate internal vs external status for the later change
to store the external status directly in cur_msg->status.
No functional changes intended.
Co-developed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Message-ID: <20250902-james-nxp-spi-dma-v6-1-f7aa2c5e56e2@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Merge tag 'ib-mfd-gpio-v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into gpio/for-next
Immutable branch between MFD and GPIO due for the v6.18 merge window
Convert GPIO drivers under drivers/mfd/ to using the modernized generic
GPIO chip API.
Trivial fix to spelling mistake in comment text.
Signed-off-by: Xichao Zhao <zhao.xichao@vivo.com>
Message-ID: <20250903020347.563003-1-zhao.xichao@vivo.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Merge tag 'ib-mfd-input-v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into next
Sync up with MFD tree to bring in support for tps6594.
Add a clock id for mipi dsi reference clock, mipi dsi node used it.
Signed-off-by: WeiHao Li <cn.liweihao@gmail.com>
Acked-by: "Rob Herring (Arm)" <robh@kernel.org>
Link: https://lore.kernel.org/r/20250831104855.45883-4-cn.liweihao@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
The dev_err_probe() doesn't do anything when error is '-ENOMEM'.
Therefore, remove the useless call to dev_err_probe(), and just return the
value instead.
Signed-off-by: Xichao Zhao <zhao.xichao@vivo.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250821093845.564496-1-zhao.xichao@vivo.com
Change the 'ret' variable from unsigned int to int to store negative error
codes or zero returned by other functions.
Storing the negative error codes in unsigned type, doesn't cause an issue
at runtime but assigning negative error codes to unsigned type may trigger
a compiler warning when the -Wsign-conversion flag is enabled.
Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/all/20250829132020.82077-1-rongqianfeng@vivo.com
An ITS cache invalidation has been performed immediately after programming
the L2 DTE in gicv5_its_device_register(). No need to perform it again
right after a successful gicv5_its_device_register().
Remove it.
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/all/20250903023319.1820-1-yuzenghui@huawei.com
Use comma between vendor-prefix and chip name as it is common.
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Fixes: 45601c66b5 ("dt-bindings: input: touchscreen: convert tsc2007.txt to yaml format")
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250830085326.36120-1-akemnade@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Convert the driver to using the new generic GPIO chip interfaces from
linux/gpio/generic.h.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250811-gpio-mmio-mfd-conv-v1-2-68c5c958cf80@linaro.org
Signed-off-by: Lee Jones <lee@kernel.org>
Commit 974cc7b934 ("mfd: vexpress: Define the device as MFD cells")
removed the return value check from the call to gpiochip_add_data() (or
rather gpiochip_add() back then and later converted to devres) with no
explanation. This function however can still fail, so check the return
value and bail-out if it does.
Cc: stable@vger.kernel.org
Fixes: 974cc7b934 ("mfd: vexpress: Define the device as MFD cells")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250811-gpio-mmio-mfd-conv-v1-1-68c5c958cf80@linaro.org
Signed-off-by: Lee Jones <lee@kernel.org>
Add support for lpass wsa codec macro version 2.9, which is available in
Qualcomm Glymur SoCs.
Its compatible with 2.8 w.r.t register layouts
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Message-ID: <20250902140044.54508-7-srinivas.kandagatla@oss.qualcomm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add support for lpass codec macro version 2.9, which is available in
Qualcomm Glymur SoCs.
Its compatible with 2.8 w.r.t register layouts.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Message-ID: <20250902140044.54508-6-srinivas.kandagatla@oss.qualcomm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Document compatibles for Qualcomm Glymur SoC macro digital codecs
(VA and WSA), compatible with previous generation (SM8550 and SM8650).
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Message-ID: <20250902140044.54508-5-srinivas.kandagatla@oss.qualcomm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add support for glymur SoC based sound card support.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Message-ID: <20250902140044.54508-4-srinivas.kandagatla@oss.qualcomm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Document the bindings for the glymur sound card which is
audioreach based architecture.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Message-ID: <20250902140044.54508-3-srinivas.kandagatla@oss.qualcomm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Sound machine drivers for Qualcomm SoCs can be reused across multiple
SoCs. But user space ALSA UCM files depend on the card driver name which
should be set per board/SoC.
Allow such customization by using driver match data as sound card driver
name.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Message-ID: <20250902140044.54508-2-srinivas.kandagatla@oss.qualcomm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-18-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-17-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-16-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-15-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-14-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-13-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-12-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
To allow for multiple instances of the card, move away from static
dai_link declaration.
While at it, simplify the code as the name of the platform component
matches the name of the card's platform_device:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-11-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-10-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-9-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-8-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-7-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-6-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-5-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
To allow for multiple instances of the card, move away from static
dai_link declaration.
While at it, simplify the code as the name of the platform component
matches the name of the card's platform_device:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-4-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-3-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The name of the platform component matches the name of the card's
platform_device.
This allows for simplifying card and dai_link initialization:
- drop mach->mach_params.platform usage
- drop snd_soc_fixup_dai_links_platform_name() usage
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Message-ID: <20250902094853.1231842-2-cezary.rojewski@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Fail early from panthor_vm_bind_prepare_op_ctx instead of late from
ops->map_pages.
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20250828200116.3532255-1-olvaffe@gmail.com
The generic vDSO library uses the UAPI headers. On arm64 __BITS_PER_LONG is
always '64' even when used from the compat vDSO. In that case __GENMASK()
does an illegal bitshift, invoking undefined behaviour.
Change __BITS_PER_LONG to also work when used from the comapt vDSO.
To not confuse real userspace, only do this when building the kernel.
Reported-by: John Stultz <jstultz@google.com>
Closes: https://lore.kernel.org/lkml/CANDhNCqvKOc9JgphQwr0eDyJiyG4oLFS9R8rSFvU0fpurrJFDg@mail.gmail.com/
Fixes: cd3557a761 ("vdso/gettimeofday: Add support for auxiliary clocks")
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: John Stultz <jstultz@google.com>
Link: https://lore.kernel.org/r/20250821-vdso-arm64-compat-bitsperlong-v1-1-700bcabe7732@linutronix.de
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
PSR idle frames in VBT binary is a 4 bits wide bitfield. Checking if it's
below 0 or over 15 doesn't make sense. Remove these checks.
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://lore.kernel.org/r/20250901101033.4176277-1-jouni.hogander@intel.com
There is a kernel panic due to WARN_ONCE when panic_on_warn is set.
This issue occurs when writeback is triggered due to sync call for an
opened file(ie, writeback reason is WB_REASON_SYNC). When f2fs balance
is needed at sync path, flush for quota_release_work is triggered.
By default quota_release_work is queued to "events_unbound" queue which
does not have WQ_MEM_RECLAIM flag. During f2fs balance "writeback"
workqueue tries to flush quota_release_work causing kernel panic due to
MEM_RECLAIM flag mismatch errors.
This patch creates dedicated workqueue with WQ_MEM_RECLAIM flag
for work quota_release_work.
------------[ cut here ]------------
WARNING: CPU: 4 PID: 14867 at kernel/workqueue.c:3721 check_flush_dependency+0x13c/0x148
Call trace:
check_flush_dependency+0x13c/0x148
__flush_work+0xd0/0x398
flush_delayed_work+0x44/0x5c
dquot_writeback_dquots+0x54/0x318
f2fs_do_quota_sync+0xb8/0x1a8
f2fs_write_checkpoint+0x3cc/0x99c
f2fs_gc+0x190/0x750
f2fs_balance_fs+0x110/0x168
f2fs_write_single_data_page+0x474/0x7dc
f2fs_write_data_pages+0x7d0/0xd0c
do_writepages+0xe0/0x2f4
__writeback_single_inode+0x44/0x4ac
writeback_sb_inodes+0x30c/0x538
wb_writeback+0xf4/0x440
wb_workfn+0x128/0x5d4
process_scheduled_works+0x1c4/0x45c
worker_thread+0x32c/0x3e8
kthread+0x11c/0x1b0
ret_from_fork+0x10/0x20
Kernel panic - not syncing: kernel: panic_on_warn set ...
Fixes: ac6f420291 ("quota: flush quota_release_work upon quota writeback")
CC: stable@vger.kernel.org
Signed-off-by: Shashank A P <shashank.ap@samsung.com>
Link: https://patch.msgid.link/20250901092905.2115-1-shashank.ap@samsung.com
Signed-off-by: Jan Kara <jack@suse.cz>
Add a system level power-off handler if the "system-power-controller"
flag is set for this device in the device tree.
A power-off request is triggered by writing the TRIGGER_I2C_0 bit (which
is actually just a convention and really depends on the freely
programmable FSM).
Co-developed-by: Job Sava <jsava@criticallink.com>
Signed-off-by: Job Sava <jsava@criticallink.com>
Signed-off-by: Michael Walle <mwalle@kernel.org>
Link: https://lore.kernel.org/r/20250826134631.1499936-4-mwalle@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
The PMIC has a multi-function pin PB/EN/VSENSE. If it is configured as
push-button (PB), add the corresponding device for it.
Co-developed-by: Job Sava <jsava@criticallink.com>
Signed-off-by: Job Sava <jsava@criticallink.com>
Signed-off-by: Michael Walle <mwalle@kernel.org>
Link: https://lore.kernel.org/r/20250826134631.1499936-3-mwalle@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
TPS6594 defines two interrupts for the power button one for push and
one for release.
This driver is very simple in that it maps the push interrupt to a key
input and the release interrupt to a key release.
Signed-off-by: Job Sava <jsava@criticallink.com>
Signed-off-by: Michael Walle <mwalle@kernel.org>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://lore.kernel.org/r/20250826134631.1499936-2-mwalle@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
b3c869d35b ("jiffies: Remove compile time assumptions about
CLOCK_TICK_RATE") removed the last definition of SHIFTED_HZ but left
behind comments about it. Remove the comments as well.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250825203425.796034-1-helgaas@kernel.org
The call to __iter_div_u64_rem() in vdso_time_update_aux() is a wrapper
around subtraction. It cannot be used to divide large numbers, as that
introduces long, computationally expensive delays. A regular u64 division
is also not possible in the timekeeper update path as it can be too slow.
Instead of splitting the ktime_t offset into into second and subsecond
components during the timekeeper update fast-path, do it together with the
adjustment of tk->offs_aux in the slow-path. Equivalent to the handling of
offs_boot and monotonic_to_boot.
Reuse the storage of monotonic_to_boot for the new field, as it is not used
by auxiliary timekeepers.
Fixes: 380b84e168 ("vdso/vsyscall: Update auxiliary clock data in the datapage")
Reported-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250825-vdso-auxclock-division-v1-1-a1d32a16a313@linutronix.de
Closes: https://lore.kernel.org/lkml/aKwsNNWsHJg8IKzj@localhost/
Currently, only one pair of mixers is supported, so a non-zero counter
value is sufficient to identify the correct mixer within that pair.
However, future implementations may involve multiple mixer pairs. With
the current implementation, all mixers within the second pair would be
incorrectly selected as right mixer. To correctly select the mixer
within a pair, test the least significant bit of the counter. If the
least significant bit is not set, select the mixer as left one;
otherwise, select the mixer as right one for all pairs.
Signed-off-by: Jun Nie <jun.nie@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/669226/
Link: https://lore.kernel.org/r/20250819-v6-16-rc2-quad-pipe-upstream-v15-3-2c7a85089db8@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
