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git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
Pull power supply fixes from Sebastian Reichel:
"power-supply core:
- prevent unregistering a power supply while a callback runs
power-supply drivers:
- generic-adc-battery: Fix temperature IIO channel conversion
- ds2780: Fix ds2780_get_capacity() returning raw value
- max17042_battery: Fix vmin assigned instead of vmax in DT parsing
- Fix maintenance charge table kernel-doc"
* tag 'for-v7.3-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply:
power: supply: core: prevent unregistering a power supply while a callback runs
power: supply: generic-adc-battery: Fix temperature IIO channel conversion
power: supply: ds2780: Fix ds2780_get_capacity() returning raw value
power: supply: Fix maintenance charge table kernel-doc
power: supply: max17042_battery: Fix vmin assigned instead of vmax in DT parsing
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Remove need in header file in preparation for pdata probing removal.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Link: https://patch.msgid.link/20261013181417.492252-4-clamor95@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Svyatoslav Ryhel <clamor95@gmail.com> says:
Add support for auxiliary devices, such as amplifiers, sound-muxes or dsp,
to be added to the sound card.
Link: https://patch.msgid.link/20261013180253.477605-1-clamor95@gmail.com
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bui duc phuc <phucduc.bui@gmail.com> says:
This series fixes clock error handling in the Atmel I2S driver by
propagating errors, using optional clock APIs, and simplifying probe
error reporting.
Found by manual code inspection.
Compile-tested only.
Link: https://patch.msgid.link/20261002043856.97295-1-phucduc.bui@gmail.com
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https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into soc/arm
Samsung mach/soc changes for v7.4
Switch to software nodes for GPIO keys, which will allow later dropping
platform data from gpio-keys driver. Likewise improve samsung-keypad
input driver and drop platform data there as well.
* tag 'samsung-soc-7.4' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
ARM: EXYNOS: Replace __ASSEMBLY__ with __ASSEMBLER__
ARM: s3c: crag6410: use software nodes/properties to set up GPIO keys
Input: samsung-keypad - remove support for platform data
ARM: s3c: crag6410: switch keypad device to software properties
ARM: s3c: register and attach software nodes for Samsung gpio_chips
Input: samsung-keypad - handle compact binding
dt-bindings: input: samsung,s3c6410-keypad: introduce compact binding
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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https://git.kernel.org/pub/scm/linux/kernel/git/chleroy/linux into soc/drivers
FSL SOC Changes for 7.4
Freescale QUICC Engine:
- Fix sparse warnings in GPIO
- Drop GPIOD_FLAGS_BIT_NONEXCLUSIVE
Freescale CPM1 Timeslot Assigner:
- Fix clock leak in tsa_of_parse_tdms()
Data Path I/O:
- Free the IRQ before releasing the I/O object
- Fix cleanup on IRQ registration failure
Freescale Management Complex:
- Annotate fsl_mc_io.portal_virt_addr with __counted_by_ptr
- Drop the fwnode links of the dpmacs nodes
- Register the object drivers after misc_class exists
- Set dma_mask for the DPRC devices
- Fix repeated word 'for' in comment
* tag 'soc_fsl-7.4-1' of https://git.kernel.org/pub/scm/linux/kernel/git/chleroy/linux:
soc: fsl: dpio: Free the IRQ before releasing the I/O object
soc: fsl: dpio: Fix cleanup on IRQ registration failure
bus: fsl-mc: Annotate fsl_mc_io.portal_virt_addr with __counted_by_ptr
bus: fsl-mc: drop the fwnode links of the dpmacs nodes
soc: fsl: cpm1: tsa: Fix clock leak in tsa_of_parse_tdms()
soc: fsl: qe: drop GPIOD_FLAGS_BIT_NONEXCLUSIVE
bus: fsl-mc: register the object drivers after misc_class exists
bus: fsl-mc: set dma_mask for the DPRC devices
bus: fsl-mc: fix repeated word 'for' in comment
soc: fsl: qe: Fix sparse warnings in GPIO
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux into soc/drivers
TI SoC driver updates for v7.4
Small cleanup-only pull request for drivers/firmware and drivers/soc/ti.
It contains no functional changes to SoC behavior and no new features
Firmware:
- ti_sci: Simplify the buffer pointer allocation by using kzalloc() in place
of kcalloc()
- ti_sci: Fix a typo in comments
SoC drivers:
- k3-ringacc: Correct the ring API kernel-doc and the DMA ring initialization
kernel-doc so the documentation matches the code
- knav_qmss: Fix typos in comments
* tag 'ti-driver-soc-for-v7.4' of https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux:
soc: ti: k3-ringacc: Fix DMA ring initialization kernel-doc
soc: ti: k3-ringacc: Correct ring API kernel-doc
firmware: ti_sci: replace kcalloc with kzalloc for buffer pointer allocation
soc: ti: knav_qmss: Fix typos in comments
firmware: ti_sci: Fix typo "upto" in comments
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into soc/drivers
More Qualcomm driver updates for v7.4
Add SM8950 Maili and SM8975 Hawi SoC IDs. Document the Maili CPUCP
mailbox and PMIC arbiter compatibles.
Allow QSEECOM on the Kalambo CRD, Glymur QCB, and Lenovo ThinkPad T14s
Gen 7. Reuse Glymur's UBWC configuration for Kalambo, and add the Nord
LLCC configuration and binding.
Add Shikra SoC and subsystem low-power statistics. Document its
modem_apps GLINK audio channel. Document MSM8952 SCM and record that
MSM8952 has no UBWC. Describe IPQ5424 IMEM as mmio-sram and add the
MSM8960 SPS interrupt-controller syscon compatible.
Fix SCM PAS resource-table retries and handling of empty tables. Use
sleepable one-time initialization for TZMEM, and correct SCM Kconfig
selection for non-Qualcomm builds. Disable the SHM bridge on SM7125
to avoid boot-time RCU stalls.
Fix PMIC GLINK probe ordering and PD charger ULOG removal races. Provide
I2C Hub serial-engine program-RAM depth without accessing absent DMA
registers.
* tag 'qcom-drivers-for-7.4-3' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux: (31 commits)
soc: qcom: geni-se: Drop unused icc_ddr parameter from geni_icc_get()
firmware: qcom: scm: Allow QSEECOM on ThinkPad T14s Gen 7
dt-bindings: mailbox: qcom: Document Maili CPUCP mailbox controller
dt-bindings: spmi: glymur-spmi-pmic-arb: Add compatible for Qualcomm Maili SoC
soc: qcom: pmic_pdcharger_ulog: prevent work requeue during remove
ASoC: dt-bindings: qcom,apr: Add modem_apps GLINK channel for shikra
firmware: qcom: tzmem: disable SHM bridge for SM7125 platform
soc: qcom: ubwc: Add Kalambo UBWC config
firmware: qcom: scm: Allow QSEECOM on Kalambo CRD
firmware: qcom: scm: Allow QSEECOM on the Glymur QCB
soc: qcom: stats: Add stats compatible and config for Shikra
dt-bindings: soc: qcom: stats: Add compatible for Shikra
soc: qcom: fix typo "upto" in comment
firmware: qcom: fix typo "uninterruptable" in comment
soc: qcom: socinfo: Add SM8950 SoC ID
dt-bindings: arm: qcom,ids: Add SoC ID for SM8950
soc: qcom: geni-se: provide PROG_RAM_DEPTH for I2C HUB Serial Engines
dt-bindings: mfd: syscon: add qcom,msm8960-sps-sic
firmware: qcom: scm: Hide QCOM_SCM instead of depending on ARCH_QCOM
soc: qcom: llcc: Add LLCC configuration for Nord
...
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into soc/drivers
Qualcomm driver updates for v7.4 (second attempt)
Add UBWC 7.0 configuration for Hawi and Maili, and reuse Glymur's UBWC
configuration for Nord.
Parse Glymur's DDR information from SMEM, including its frequency plan and
highest bank bit. Correct DDR frequency overflow and byte order, and handle
unrecognized DDR layouts correctly.
Configure dedicated LLCC slices for the IPQ5424 PPE and Wi-Fi datapaths,
adjust the CPU slice, and propagate errors from optional IRQ lookup.
Allow the GENI serial-engine driver to be selected on 32-bit Qualcomm SoCs
such as Kuno. Fix firmware loading bounds, endianness, and writes to
read-only firmware.
Allow QSEECOM on the Glymur-based HP EliteBook X G2q 14 AI, Lenovo Yoga
Slim 7x Gen11, and Asus Zenbook A14 (UX3407NA), enabling EFI variable
access on the HP and Asus laptops. Release SCM reserved memory on probe
failure or unbind, and limit Qualcomm firmware Kconfig options to Qualcomm
platforms.
Defer PMIC GLINK altmode work until devices resume to avoid accessing
suspended I2C controllers.
Fix cleanup of failed APR service registrations to prevent stale lookups,
and remove unused APR device-ID matching.
Add the SM7250 SoC ID, correct SMSM and SMP2P I/O annotations, and clean
up RPMh kernel-doc and redundant IRQ error messages.
Document the Kuno SCM interface, Shikra CTCU fallback, and Milos CPU
bandwidth monitor. Add Abel Vesa as a Qualcomm SoC reviewer.
* tag 'qcom-drivers-for-7.4-2' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux: (34 commits)
firmware: qcom: scm: Allow QSEECOM on Asus Zenbook A14 (UX3407NA)
firmware: qcom: scm: Allow QSEECOM on Yoga Slim 7x Gen11
MAINTAINERS: add Abel as reviewer for linux-arm-msm
soc: qcom: ubwcg: Add Nord UBWC config
firmware: QCOM interfaces should depend on ARCH_QCOM
firmware: qcom: scm: Use devm_of_reserved_mem_device_init()
soc: qcom: smp2p: fix __iomem annotation on entry->value pointer
soc: qcom: apr: clean up failed service registrations
soc: qcom: smem: Fix signedness bug in smem_dram_parse()
soc: qcom: ubwc: Add configuration for Maili
soc: qcom: ubwc: Add configuration for Hawi
soc: qcom: rpmh-rsc: fix kernel-doc issues in rpmh-rsc.c
soc: qcom: rpmh: fix kernel-doc issues in rpmh.c
soc: qcom: rpmh-internal: fix kernel-doc issues in rpmh-internal.h
soc: qcom: pmic_glink: Fix device access from worker during suspend
soc: qcom: llcc-qcom: Handle errors from optional IRQ lookup
soc: qcom: geni-se: Fix write to read-only firmware buffer
soc: qcom: geni-se: Fix fw_end computed before round-up; propagate size to caller
soc: qcom: geni-se: Widen fw_size to u32 to prevent wrap-around
soc: qcom: geni-se: Fix endian conversion for serial_protocol comparison
...
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/coresight/linux into char-misc-next
Suzuki writes:
coresight: updates for Linux v7.4
CoreSight selfhosted tracing subsystem updates for Linux v7.4, includes:
- Separating the ETM configurations for sysfs and perf to avoid corrupting
each other while in use
- Hide sysfs control for TRBE as it is not supported
- Constify Amba device table for tnoc
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
* tag 'coresight-next-v7.4' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/coresight/linux:
coresight: tnoc: Constify amba_id table
coresight: etm3x: rename drvdata->config to sysfs_config
coresight: etm3x: rename local config as curr_config referring drvdata->curr_config
coresight: etm3x: introduce struct etm_caps
coresight: etm4x: rename drvdata->config to sysfs_config
coresight: etm4x: rename local config as curr_config referring drvdata->curr_config
coresight: etm4x: remove s_ex_level from config
coresight: etm4x: exclude ss_status from drvdata->config
coresight: etm4x: introduce struct etm4_caps
coresight: etm3x: remove redundant cpu online check on etm_enable_sysfs()
coresight: etm3x: fix inconsistencies with sysfs configuration
coresight: etm4x: fix inconsistencies with sysfs configuration
coresight: etm3x: Prohibit modifying cntr_val while session is enabled
coresight: etm4x: prohibit modifying cntr_val while session is enabled
coresight: etm4x: Prohibit TRCSEQSTR modifications while tracing enabled
coresight: trbe: Hide enable_sink sysfs file
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ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/mani/mhi into char-misc-next
Manivannan writes:
MHI Host
--------
- Add a host-side loopback client driver that binds to the standard MHI
LOOPBACK channel and exposes a sysfs interface for data path testing. The
interface lets users configure the TRE buffer size and count, trigger a
loopback test, and read back the result to validate the MHI data path
between host and endpoint.
- Add the IP_CTRL channel (18/19) to the Sierra EM919x/EM929x channel
configuration. IP_CTRL is a standard Qualcomm MHI control channel that
carries the host serial control lines (DTR/RTS) to the modem, which the
host previously had no way to drive for these devices.
- Add the DUN uplink (32) and downlink (33) channels to the Qualcomm modem
channel configuration. These channels transport AT commands over MHI and
let userspace reach the modem AT interface through the MHI WWAN client
driver.
- Add support for the Quectel RM500Q-AE (SDX55) module. It provides MBIM
control on channels 12/13, not the QMI setup that the generic SDX55 entry
assumes, so QMI requests over the control channel were timing out. Add an
entry matched by its subsystem ID that reuses the Quectel MBIM channel
configuration, so no out-of-tree driver is needed.
- Fix a runtime PM usage count imbalance for no_m3 devices in the pci_generic
driver. Probe only dropped the reference taken by the PCI core when the
device supported both PME from D3hot and M3, while remove re-took it based
on PME capability alone. The count therefore crept up on every bind/unbind
cycle and could end up preventing runtime suspend. QDU100 is the only
affected device today.
- Convert the %pK pointer format specifier to %p. Pointers are hashed by
default now, so %pK is no longer needed to prevent address leaks, and %p
keeps the value available for debugging.
- Fix a spelling typo ("intented") in a comment.
MHI Endpoint
------------
- Add the mhi_ep_queue_buf() API for queuing raw buffers on downlink
transfers, for endpoint clients that do not use socket buffers. The
existing mhi_ep_queue_skb() is refactored to share a common internal
helper with the new API.
- Add an endpoint-side loopback client driver that binds to the LOOPBACK
channel and echoes received data back to the host. On a Linux-based
endpoint there is no modem firmware to provide the echo, so this driver
acts as the software echo partner for the host loopback driver and
completes the end-to-end MHI data path test.
- Pass IRQF_NO_AUTOEN to request_irq() for the doorbell IRQ instead of
setting IRQ_NOAUTOEN on the descriptor by hand. The manual flag was never
cleared on the error paths or at unregister, so it leaked onto the
descriptor after the IRQ was freed.
* tag 'mhi-for-v7.4' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/mani/mhi:
bus: mhi: ep: clients: Add loopback driver for data path testing
bus: mhi: ep: Add mhi_ep_queue_buf() API for raw buffer queuing
bus: mhi: host: clients: Add loopback driver with sysfs interface
bus: mhi: host: pci_generic: Add Quectel RM500Q-AE support
bus: mhi: host: pci_generic: Add DUN channel configuration
bus: mhi: ep: Use IRQF_NO_AUTOEN flag in request_irq()
bus: mhi: host: Use %p for pointer formatting
bus: mhi: host: Fix typo "intented" in comment
bus: mhi: host: pci_generic: Fix runtime PM imbalance for no_m3 devices
bus: mhi: host: pci_generic: Add IP_CTRL channel for Sierra EM919x/EM929x
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No more users.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260715192415.1326037-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
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Returning an error code from pm_runtime_put_autosuspend() merely means
that it has not queued up a timer or work item to check whether or not
the device can be suspended and there are many perfectly valid
situations in which that can happen, like after writing "on" to the
device's runtime PM "control" attribute in sysfs for one example.
Modify gb_pm_runtime_put_autosuspend() to discard the
pm_runtime_put_autosuspend() return value, change its return type to
void, and update its caller in the Greybus power supply driver
accordingly. Also drop the redundant pm_runtime_mark_last_busy() call
from gb_pm_runtime_put_autosuspend() while we're here, as this is
already part of pm_runtime_put_autosuspend().
Note that this resolves a bug in the power_supply driver: in tracking
'gbpsy->pm_acquired', it erroneously assumed that
pm_runtime_put_autosuspend() would not release a refcount when it
returned a non-zero value. That's a false assumption.
This will facilitate a planned change of the
pm_runtime_put_autosuspend() return type to void in the future, similar
to commit 3afd8df02433 ("PM: runtime: Change pm_runtime_put() return
type to void").
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Alex Elder <elder@riscstar.com>
Link: https://patch.msgid.link/20261006161337.7.Ib0925681ca623093ddf812cc4de848e10ec07c73@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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gso_features_check() decides whether an egress device can offload a GSO
skb as a single TSO frame by comparing the segment count and the frame
length against the device limits. The resegmentation path added by a
later patch caps the MSS segments per output skb and needs the same
features computed without those limits, so put the two tests in a helper
and gate them with one flag.
__netif_skb_features() takes that flag and takes the place of
netif_skb_features(), which becomes an inline wrapper in netdevice.h and
passes the flag set. Existing callers keep their call, and the
resegmentation path asks for the features without the limit checks.
No functional changes.
Reviewed-by: Willem de Bruijn <willemb@google.com>
Assisted-by: LLM
Signed-off-by: Wang Zhan <wang.zhan@smartx.com>
Link: https://patch.msgid.link/20261008100651.2534957-3-wang.zhan@smartx.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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gso_features_check() compares the frame length against
netif_get_gso_max_size(), which picks the IPv4 or the IPv6 limit from
skb->protocol. A tag which is already inside the frame replaces that field
with the VLAN ethertype, as skb_vlan_push() does, and an IPv6 packet is
then measured against the IPv4 limit and segmented although the device
could send it as one TSO frame.
The lookup moves from netdevice.h into dev.c: vlan_get_protocol() reads the
L3 protocol from behind an in-frame tag, while if_vlan.h includes
netdevice.h, so an inline in that header cannot call it. dev.c is the only
file which calls the lookup, so it becomes a static helper there.
Reviewed-by: Willem de Bruijn <willemb@google.com>
Assisted-by: LLM
Signed-off-by: Wang Zhan <wang.zhan@smartx.com>
Link: https://patch.msgid.link/20261008100651.2534957-2-wang.zhan@smartx.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into soc/drivers
Qualcomm driver fixes for v7.3
All clients was migrated from the Qualcomm SCM PAS API to the Qualcomm
PAS API in v7.3, remove the now unused direct API.
* tag 'qcom-drivers-fixes-for-7.3' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux:
firmware: qcom_scm: Remove SCM PAS wrappers
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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rb_add_augmented_cached() links the new node and then calls
->propagate() from the parent up to the root to bring the augmented
data of the ancestors up to date. It marks that as "suboptimal": every
augmented user that open-codes its insertion (interval trees, vmalloc,
drm_mm, gpu buddy, ...) instead folds the new node's value into each
ancestor while walking down, which touches no sibling and needs no
second pass. ->propagate() has to read both children of every
ancestor until it finds one whose value did not change.
Add a ->merge() callback to struct rb_augment_callbacks that folds the
augmented data of a node being inserted into one of its future
ancestors, and use it on the descent. RB_DECLARE_CALLBACKS() derives
it from the RB_AUG() list, so every user of the template gets it for
free, and sched/eevdf, the only caller of the helper, needs no change.
The new node's augmented data must describe the node alone before the
call. That was already required, since ->propagate() read it, and
sched/eevdf sets it up that way.
Measured with rbtree_test's cached augmented test switched to
rb_add_augmented_cached() (next patch), nnodes cached insert+delete,
median of 5 runs, for reference also the open-coded descent used by
augmented test 1. Raspberry Pi 4 Model B (Cortex-A72, 1.8 GHz), arch
timer ticks (54 MHz):
nnodes open-coded before after
100 459 500 442 (-11.6%)
10000 182046 186144 180208 (-3.2%)
100000 5533679 5711647 5579444 (-2.3%)
x86-64 KVM guest (Intel i7-13800H), cycles:
nnodes open-coded before after
100 7657 7622 7059 (-7.4%)
10000 4738075 5075847 4627462 (-8.8%)
100000 75618429 79840335 71324700 (-10.7%)
The other rbtree_test numbers are unchanged and the augmented invariant
checks still pass on both.
Signed-off-by: Yiwei Lin <s921975628@gmail.com>
Assisted-by: LLM
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20261005093236.62702-4-s921975628@gmail.com
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RB_DECLARE_CALLBACKS_MULTI() asks its user for a function that copies
the augmented fields and one that recomputes them from the children,
with the early-exit protocol of ->propagate() hand-coded in the latter.
sched/eevdf, its only user, needs five helpers for three fields.
Describe each augmented field instead: RB_AUG(val, aug, fold) names the
per-node value, the member holding the subtree aggregate and how two
aggregates combine (min, max, a sum, ...). RB_AUG_FUNC() takes a
function for the per-node value. The template then generates, per
field, a recompute that works on a local and stores once, and a copy,
and combines them into the callbacks; the early exit is the AND of the
per-field results.
RB_DECLARE_CALLBACKS() is the only template left.
RB_DECLARE_CALLBACKS_MAX() becomes RB_AUG_FUNC(RBVALUE, RBAUGMENTED,
max) in a wrapper, with its RBCOMPUTE argument renamed to RBVALUE,
since it returns the per-node scalar and is a different thing from the
RBCOMPUTE of the generic template it used to build on.
RB_DECLARE_CALLBACKS_MULTI() goes away.
sched/eevdf shrinks to a wrapping-safe min() for min_vruntime and
three RB_AUG() lines.
No functional change intended.
[yiwei: take a fold(a, b) instead of a "replace?" compare so that sums
and counts can be expressed too, which also lets min()/max() replace
RB_MIN()/RB_MAX(); wrapped the lines over 100 columns]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Yiwei Lin <s921975628@gmail.com>
Assisted-by: LLM
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20260928213736.GA2947991@noisy.programming.kicks-ass.net
Link: https://patch.msgid.link/20261005093236.62702-3-s921975628@gmail.com
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Pickup dependencies; notably the RB-tree fix.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
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The core provides helper functions and structures for handling
transaction requests to local address regions.
Add kerneldoc comments for these symbols.
Link: https://lore.kernel.org/r/20261013111509.612518-3-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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The core provides helper functions and structures for initiating
asynchronous transactions.
Add kerneldoc comments for these symbols.
Link: https://lore.kernel.org/r/20261013111509.612518-2-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
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memmap_alloc() was the only in-kernel caller of
memblock_alloc_exact_nid_raw(). After removing its unused exact_nid
argument, the function no longer has any callers.
Remove memblock_alloc_exact_nid_raw() and its declaration. The remaining
callers of memblock_alloc_internal() always allow allocation to fall back
to other NUMA nodes, so remove its exact_nid argument and pass false
directly to memblock_alloc_range_nid().
Suggested-by: Lorenzo Stoakes <ljs@kernel.org>
Signed-off-by: Kaitao Cheng <chengkaitao@kylinos.cn>
Link: https://patch.msgid.link/20260919135327.74089-4-kaitao.cheng@linux.dev
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
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series
Newer ASUS ProArt laptops (e.g. H7606 series) implement dGPU power
control on WMI DEVID 0x00090120 instead of the usual 0x00090020.
The default DEVID returns 0xFFFFFFE2 on these models, so the
dgpu_disable firmware attribute is never created and the dGPU cannot
be re-enabled from Linux at all.
Add a fallback probe for device ID 0x00090120 following the same
approach as the gpu_mux_dev_id probe.
Details for 0x00090120 (confirmed on H7606W using direct WMNB calls
and inspecting the DSDT DEVS handler):
- Reading DSTS returns 0x00010001 when the dGPU is off (CUMA=1),
or 0x00010000 when it's on.
- Writing DEVS: 0 enables the dGPU (calls PG00._ON() + Notifies
PEGP, Device Check), and 1 disables or ejects it.
This behavior matches the dgpu_disable attribute (1 = disabled).
Signed-off-by: Denis Benato <denis.benato@linux.dev>
Link: https://patch.msgid.link/20260925144229.3693-4-denis.benato@linux.dev
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
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Add support for WMI device 0x0004001c and register it as the
platform::mute LED using the audio-mute trigger.
The device ID is present in the PM3406CKA DSDT and is also used
by GHelper for controlling the same LED.
Tested on ASUS ExpertBook PM3406CKA.
Signed-off-by: Patryk Dańków <patryk.dankow@protonmail.com>
Reviewed-by: Denis Benato <denis.benato@linux.dev>
Link: https://patch.msgid.link/20260915174110.67871-2-patryk.dankow@protonmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
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Add str_supported_unsupported() to return "supported" or "unsupported"
depending on the boolean argument. Also add the inverse
str_unsupported_supported().
Suggested-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Thorsten Blum <blum@kernel.org>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Link: https://patch.msgid.link/20260907084319.351688-5-blum@kernel.org
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
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damon_set_attrs() accepts sample_interval == 0. This was reported as a
bug in v1 of this patch (rejecting it in damon_set_attrs()). A similar
patch was already declined for the same reason: a zero interval is
intentionally supported [1].
Document the behavior instead of changing it.
Link: https://lore.kernel.org/20260921151547.78472-5-sj@kernel.org
Link: https://lore.kernel.org/all/20260722094304.3132750-1-dayou5941@163.com/ [1]
Signed-off-by: Karthikeyan KS <karthiproffesional@gmail.com>
Signed-off-by: SJ Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: SJ Park <sj@kernel.org>
Cc: Adrian Huang <adrianhuang0701@gmail.com>
Cc: Liew Rui Yan <aethernet65535@gmail.com>
Cc: Xuewen Wang <wangxuewen@kylinos.cn>
Cc: Zenghui Yu (Huawei) <zenghui.yu@linux.dev>
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The set_memory() and set_direct_map() APIs change permissions of existing
kernel mappings, but their semantics are only described by the code, and
that code differs from architecture to architecture.
Add Documentation/mm/kernel-page-tables.rst that briefly describes what
the kernel page tables consist of, defines the semantics both APIs have in
common, including the parts that are easy to get wrong, and lists the
differences between the architecture implementations.
Add kernel-doc comments for the generic set_memory() and set_direct_map()
stubs and link them into Documentation/core-api/mm-api.rst.
[rppt@kernel.org: fix phrasing, per Kevin]
Link: https://lore.kernel.org/arJNn2QD_pY6e14R@kernel.org
Link: https://lore.kernel.org/20260919-set-memory-docs-v2-1-a2a4b3657690@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Kevin Brodsky <kevin.brodsky@arm.com>
Assisted-by: copilot:claude-opus
Cc: "David Hildenbrand (arm)" <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Shuah khan <skhan@linuxfoundation.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: "Vlastimil Babka (SUSE)" <vbabka@kernel.org>
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Generic MM default pxdp_get() helpers fetch the values contained in
pgtable entries via READ_ONCE() without modifying them. Just make their
arguments explicitly 'const' for some additional protection.
Link: https://lore.kernel.org/20260918064928.793742-1-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Suggested-by: David Hildenbrand <david@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Reviewed-by: SJ Park <sj@kernel.org>
Cc: Pedro Falcato <pfalcato@suse.de>
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Since commit 93976a20345b ("mm: eliminate further swapops predicates"),
is_hwpoison_entry() has no callers.
So remove it.
No functional change.
Link: https://lore.kernel.org/20260918165642.1014988-1-ekffu200098@gmail.com
Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: SJ Park <sj@kernel.org>
Reviewed-by: Zenghui Yu (Huawei) <zenghui.yu@linux.dev>
Reviewed-by: Barry Song <baohua@kernel.org>
Acked-by: Chris Li <chrisl@kernel.org>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Youngjun Park <youngjun.park@lge.com>
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Patch series "mm/damon: improve readability, clarity and test coverage".
Yet another batch of miscellaneous DAMON minor improvements. Mostly
focused on readability and clarity of code and document, and unit/self
test coverage. No user-visible behavioral change is intended.
This patch (of 10):
Nobody uses NR_DAMOS_FILTER_TYPES. Remove it.
Link: https://lore.kernel.org/20260917142210.90829-1-sj@kernel.org
Link: https://lore.kernel.org/20260917142210.90829-2-sj@kernel.org
Signed-off-by: SJ Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Asier Gutierrez <gutierrez.asier@huawei-partners.com>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: David Gow <davidgow@davidgow.net>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
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A PG_dropbehind folio is dropped from its cache once writeback completes
rather than left for reclaim to find later; this is implemented for file
folios in folio_end_dropbehind(). Extend it to swap cache folios.
The drop blocks on the folio lock, so it cannot run in interrupt
context. Set BIO_COMPLETE_IN_TASK on the write, as the file dropbehind
paths do, and drop the folio directly from folio_end_writeback().
It has to block rather than trylock: the folio is off the LRU, so
skipping it would leave it in the swap cache with nothing able to
reclaim it, and it cannot be put back while another thread holds its
lock.
Link: https://lore.kernel.org/20260921151306.625134-3-alex@ghiti.fr
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Suggested-by: Yosry Ahmed <yosry@kernel.org>
Suggested-by: Johannes Weiner <hannes@cmpxchg.org>
Suggested-by: Nhat Pham <nphamcs@gmail.com>
Reviewed-by: Nhat Pham <nphamcs@gmail.com>
Reviewed-by: Kunwu Chan <kunwu.chan@gmail.com>
Reviewed-by: Barry Song <baohua@kernel.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Chis Li <chrisl@kernel.org>
Cc: Christian Brauner (Amutable) <brauner@kernel.org>
Cc: "David Hildenbrand (arm)" <david@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Qi Zheng <qi.zheng@linux.dev>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Tal Zussman <tz2294@columbia.edu>
Cc: Usama Arif <usama.arif@linux.dev>
Cc: Wei Xu <weixugc@google.com>
Cc: Youngjun Park <youngjun.park@lge.com>
Cc: Yuanchu Xie <yuanchu@google.com>
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mem_cgroup_zswap_writeback_enabled() only reads the zswap_writeback flags,
and mem_cgroup_get_socket_pressure() only reads the socket pressure
timestamp. Constify them.
Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-11-c239a6010b58@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Muchun Song <muchun.song@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
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Both only read swappiness and the memory limits. Constify them.
Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-10-c239a6010b58@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Muchun Song <muchun.song@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
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mem_cgroup_get_nr_swap_pages(), mem_cgroup_get_folio_swap_margin(), and
mem_cgroup_swap_full() only read swap counters and limits. Constify them.
Remove externs from function declarations while at it.
Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-9-c239a6010b58@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Muchun Song <muchun.song@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
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The memcg_page_state(), memcg_events(), and lruvec_page_state() families
only read counters. Constify them.
Use container_of_const() in the lruvec_page_state() family while at it, so
the const isn't silently cast away.
Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-8-c239a6010b58@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Muchun Song <muchun.song@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
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mem_cgroup_protection(), mem_cgroup_unprotected(), mem_cgroup_below_low(),
and mem_cgroup_below_min() only read the protection state. Constify them.
Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-7-c239a6010b58@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Muchun Song <muchun.song@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
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Both only read the counter. Constify them so that users can read counters
from const memcgs.
Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-6-c239a6010b58@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
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mem_cgroup_id(), parent_mem_cgroup(), mem_cgroup_is_root(),
mem_cgroup_is_descendant(), memcg_kmem_id(), and the other memcg accessors
only read from the memcg. Constify them, along with
mem_cgroup_shrink_is_root()'s shrink_control.
mem_cgroup_print_oom_context()'s task stays non-const, as task_cgroup()
takes a non-const task.
Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-5-c239a6010b58@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Muchun Song <muchun.song@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
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The lruvec lookup helpers only read from the memcg, folio, or lruvec they
are given. Constify them, along with lruvec_pgdat() and the folio
argument of the folio_lruvec_relock_irq() helpers. mem_cgroup_lruvec()
may update lruvec->pgdat for a newly onlined node, but that lives in the
per-node structure, not the memcg. Similarly, lruvec_pgdat() still
returns a non-const pgdat and does not use container_of_const().
Use container_of_const() in lruvec_memcg() and
mem_cgroup_get_zone_lru_size(), so the const isn't silently cast away.
Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-3-c239a6010b58@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
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obj_cgroup_memcg() and get_mem_cgroup_from_objcg() only read from the
objcg. Constify them.
Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-2-c239a6010b58@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
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Patch series "mm: memcontrol: constify the read side of the read side of
the memcg API", v3.
The memcg accessors, lruvec helpers, and stat readers only read from the
memcg, folio, or lruvec they are given, but take non-const pointers.
Constify them, along with the page_counter readers and the swap I/O blkg
helpers along the way.
This patch (of 11):
The folio_memcg() family only reads from the folio, and everything it
calls already takes a const folio. Constify it, along with the page
wrappers built on top of it and get_obj_cgroup_from_folio(), which only
reads the folio's objcg.
Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-0-c239a6010b58@columbia.edu
Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-1-c239a6010b58@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Baoquan He <baoquan.he@linux.dev>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
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Patch series "mm/damon: introduce hugepage_size probe filter".
Knowing whether a given memory is backed by a hugepage of specific size
is useful for efficient utilization of hugepages. For easy monitoring
of the information, introduce a new data attribute probe filter type,
hugepage_size. It works similar to the DAMOS filter of the same name.
It works for memory that is backed by a hugepage of a given size range.
Patch 1 introduces the new probe filter type to DAMON API and extends
related data structures. Patch 2 updates probe filter commit logic to
handle the size range. Patch 3 Updates the filtering logic to support
the new type. Patch 4 adds new DAMON sysfs files for the size range.
Patch 5 updates DAMON sysfs interface to fully support the new filter
type. Patches 6-8 updates design, usage and ABI documents for the new
feature.
This patch (of 8):
Introduce a new data attribute probe filter type, hugepage_size. It will
work for memory that is backed by a hugepage of a given size range. Add a
new damon_filter_type enum DAMON_FILTER_TYPE_HUGEPAGE_SIZE to identify the
type. Add two new fields in the damon_filter struct for saving the size
range.
Link: https://lore.kernel.org/20260915143359.91472-1-sj@kernel.org
Link: https://lore.kernel.org/20260915143359.91472-2-sj@kernel.org
Signed-off-by: SJ Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
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misc.2026.10.06a: Miscellaneous fixes.
torture.2026.10.12a: Make call_{s,}rcu() invocable from any environment,
add atomic SRCU, additional SRCU updates, and torture-test updates.
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srcu_read_lock_atomic() and srcu_read_unlock_atomic() arm and disarm
might_sleep() checks via non_block_start()/non_block_end(), skipping
hardirq so the update does not land on the interrupted task's
->non_block_count.
Inline softirqs run on the interrupted task's stack as well, so a
timer callback running atomic-SRCU readers races with the interrupted
task's own ->non_block_count updates, as KCSAN reports:
BUG: KCSAN: data-race in srcu_torture_read_lock / srcu_torture_read_unlock
write to 0xffffa00f818ea418 of 4 bytes by interrupt on cpu 0:
srcu_torture_read_lock+0x422/0x470
rcutorture_one_extend+0xdc/0x600
rcu_torture_one_read+0xd1/0x330
rcu_torture_timer+0x75/0x140
call_timer_fn+0xe6/0x2f0
...
run_timer_softirq+0xb7/0x130
handle_softirqs+0xfc/0x3f0
__irq_exit_rcu+0x8e/0x100
Use in_task() so the annotation is applied only in task context; it
is redundant elsewhere because might_sleep() already warns about
sleeping from atomic context.
Signed-off-by: Kunwu Chan <kunwu.chan@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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In the core kernel, an srcu_struct structure created by DEFINE_SRCU()
or friends lives as long as the kernel does, so there are no particular
requirements surrounding the end of that structure's life. In contrast,
when DEFINE_SRCU() and friends are used within a module, the corresponding
srcu_struct structures' lifetimes end when that module exits. This in
turn means that if such a structure was passed to call_srcu(), then
srcu_barrier() must be invoked after the last call_srcu() invocation
but before the module exits.
This commit therefore adds a comment stating this.
Reported-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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This commit adds the Tiny SRCU counterpart to Tree SRCU's
synchronize_srcu_atomic(). One might hope that this could be as trivial
as Tiny RCU's synchronize_rcu(), and there was a time when it would
have been. But lazy preemption really can preempt an SRCU read-side
critical section, which means that synchronize_srcu_atomic() really must
be prepared to spin waiting for it.
This spinning currently consists of cond_resched_tasks_rcu_qs()
and cpu_relax(). It would be better to have some way of telling the
scheduler that there is nothing useful for us to do. We cannot use
the traditional wait_event() approach because synchronize_srcu_atomic()
is not permitted to block.
[ paulmck: Apply Kunwu Chan and Joel Fernandes feedback. ]
Co-developed-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Assisted-by: Claude:claude-mythos-5
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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Some dedicated srcu_struct users have read-side critical sections
which are short, never sleep, and never block on anything which may
itself depend on memory allocation — because they were, until
recently, spinlock or rwlock critical sections. For such a domain the
update side can safely wait for readers by spinning, from contexts
where sleeping is undesirable or the grace-period machinery's
latency (workqueue scheduling, jiffy-paced retries) dominates the
actual reader drain time.
But that is only safe if every reader keeps the promise. Make the
promise explicit and machine-checkable:
- srcu_read_lock_atomic() / srcu_read_unlock_atomic() enter the
usual (smp_mb-based) read-side critical section with preemption
disabled and (except in hardirq, where it is redundant)
non_block_start() armed, recording SRCU_READ_FLAVOR_ATOMIC in the
per-CPU reader flavor. Disabling preemption enforces the
no-sleeping promise on every configuration and bounds the section,
so it is always running on some CPU; non_block_start() extends the
enforcement to even potentially-sleeping calls on paths which
happen not to block. The existing reader-flavor consistency checks
complain about any mixing with other flavors.
- synchronize_srcu_atomic() waits for all pre-existing readers by
repeating the try_synchronize_srcu() both-epoch counter proof with
cpu_relax() until it succeeds: no sleeping, no index flip, no
grace-period sequence update, and therefore no interaction with
concurrent call_srcu(), synchronize_srcu() or srcu_barrier(). It
always provides the full grace-period guarantee: if the domain
turns out to have had readers of any other flavor — a caller bug,
since such a reader may be asleep and spinning on it would be
unbounded — it complains and falls back to a real (sleeping) grace
period internally, that being the only correct wait for a
possibly-sleeping reader. The flavor mask is rechecked on every
iteration so a first non-atomic reader appearing mid-spin takes
the same path.
The immediate motivation is the proposed conversion of KVM's
gfn_to_pfn_cache to SRCU¹, whose mmu_notifier invalidation path drains
readers before the primary MMU zaps a page. With the readers declared
atomic, that drain becomes spin-only: no sleeping at all in the
notifier, bounded by the longest reader section, satisfying even the
strictest reading of the OOM-reaper non-blocking requirement without
needing to touch the non_block_start() annotation².
This commit also adds atomic-SRCU-specific initializers:
init_srcu_struct_atomic(), DEFINE_SRCU_ATOMIC(), and
DEFINE_STATIC_SRCU_ATOMIC().
This commit implements only Tree SRCU. Tiny SRCU will follow.
¹ https://lore.kernel.org/all/20260811132237.102400-1-dwmw2@infradead.org/
² https://lore.kernel.org/all/20260812134934.GC662699@ziepe.ca/
[ paulmck: Apply Kunwu Chan feedback. ]
Co-developed-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Assisted-by: Claude:claude-mythos-5
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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On systems with CONFIG_PROVE_RAW_LOCK_NESTING enabled, Apple GPIO probe
triggers an "Invalid wait context" lockdep warning.
The driver uses a regmap with a raw spinlock and REGCACHE_FLAT. During
regcache_init(), regcache_flat_init() allocates memory while holding the
raw spinlock. The memory allocator can acquire a non-raw spinlock, which
causes an invalid raw-to-non-raw lock nesting error. The abbreviated call
chain is:
apple_gpio_pinctrl_probe
regcache_init
regcache_flat_init
__kmalloc_noprof
__pcs_replace_empty_main
refill_objects
_raw_spin_lock_irqsave
Cache allocation occurs before the regmap is published, cache destruction
occurs after users have stopped accessing it, and regmap_reinit_cache()
requires callers to prevent concurrent access. Remove the outer map lock
from cache initialization and destruction. Keep it for cache population
and normal register access.
The Maple cache still uses its internal spinlock during teardown. That
lock can also be acquired from hard IRQ context during register access.
Add Maple-state irqsave helpers and use them during teardown to preserve
the lock's IRQ-safe lockdep state.
Fixes: fd4ebc07b4df ("regmap: Hold the regmap lock when allocating and freeing the cache")
Suggested-by: Mark Brown <broonie@kernel.org>
Suggested-by: Liam R. Howlett <liam@infradead.org>
Signed-off-by: Michael Reeves <michael.reeves077@gmail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Link: https://patch.msgid.link/20261006-regcache-lifecycle-submit-v3-2-37bdd82fd47c@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Aayush Kumar <code@aayushk.dev> says:
Convert the sysfs show() functions to use sysfs_emit() instead of
sprintf().
Link: https://patch.msgid.link/20261009133631.579644-1-code@aayushk.dev
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