Merge series from Peter Ujfalusi <peter.ujfalusi@linux.intel.com>:
There are devices where the iDisp HDA codec for HDMI is disconnected
and it is not present on the HDA bus.
This usually happens on systems with dGPU, but not limited to them.
How SOF tried to deal with this is to drop in a dummy codec in place of
the iDisp to allow the topology to be loaded, but these PCM devices are
unusable, they fail when user tries to use them.
PA/PW is probing the PCM devices on probe and that causes the kernel log
to fill up with errors, which is harmless but disturbing.
This series will use the filter function to prevent the creation of the
HDMI PCM devices in the first place (like HDA legacy stack will not
present HDMI devices if the codec is not visible).
The topology still loads, we still use dummy codec to satisfy it, but
there will be no dummy PCM devices created.
The first two patch handles the same issue that was discovered by the
ignored link: a NULL dereference.
I'm not sure if both is needed, but I felt that fixing it in one place
and leaving the other open might not be future proof.
If I would to pick one, I would likely go with the patch for the
soc-core.
struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://patch.msgid.link/20250610-gpiochip-set-rv-ssb-v1-1-0bee5b45b411@linaro.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Don't populate the read-only array cfg_offset on the stack at run time,
instead make it static const.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Link: https://patch.msgid.link/20250619082554.1834654-1-colin.i.king@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Since secs_to_jiffies()(commit:b35108a51cf7) has been introduced, we can
use it to avoid scaling the time to msec.
Signed-off-by: Yuesong Li <liyuesong@vivo.com>
Link: https://patch.msgid.link/20250613102624.3077418-1-liyuesong@vivo.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Since secs_to_jiffies()(commit:b35108a51cf7) has been introduced, we can
use it to avoid scaling the time to msec.
Signed-off-by: Yuesong Li <liyuesong@vivo.com>
Acked-by: Stanislaw Gruszka <stf_xl@wp.pl>
Link: https://patch.msgid.link/20250612021446.3465972-1-liyuesong@vivo.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
In the case of SME-in-driver, the driver can internally choose to
update the links based on the AP MLD recommendation and do link
reconfiguration negotiation with AP MLD.
(e.g., After the driver processing the BSS Transition Management request
frame received from the AP MLD with Neighbor Report containing
Multi-Link element with recommended links information chooses to do link
reconfiguration negotiation with AP MLD).
To support this, extend cfg80211_mlo_reconf_add_done() and
NL80211_CMD_ASSOC_MLO_RECONF to indicate added links information for
driver-initiated link reconfiguration requests. For removed links,
the driver indicates links information using the
NL80211_CMD_LINKS_REMOVED event for driver-initiated cases, the same as
supplicant initiated cases.
For the driver-initiated case, cfg80211 will receive link
reconfiguration result asynchronously from driver so holding BSSes of
the accepted add links is needed in the event path. Also, no need of
unhold call for the rejected add link BSSes since there was no hold call
happened previously.
Once the supplicant receives the NL80211_CMD_ASSOC_MLO_RECONF event,
it needs to process the information about newly added links and install
per-link group keys (e.g., GTK/IGTK/BIGTK etc.).
In case of the SME-in-driver, using a vendor interface etc. to notify
the supplicant to initiate a link reconfiguration request and then
supplicant sending command to the cfg80211 can lead to race conditions.
The correct design to avoid this is that the driver indicates the
cfg80211 directly with the results of the link reconfiguration
negotiation.
Signed-off-by: Kavita Kavita <quic_kkavita@quicinc.com>
Link: https://patch.msgid.link/20250604105757.2542-3-quic_kkavita@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The existing documentation for the NL80211_CMD_ASSOC_MLO_RECONF
does not clearly explain handling of link reconfiguration request
results from the driver.
Add documentation to explain that the command is used as an event to
notify userspace about added links information, and that the existing
NL80211_CMD_LINKS_REMOVED command is used to notify userspace about
removed links information.
Signed-off-by: Kavita Kavita <quic_kkavita@quicinc.com>
Link: https://patch.msgid.link/20250604105757.2542-2-quic_kkavita@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Currently, in ieee80211_assign_beacon() mbssid count is updated as link's
bssid_indicator. mbssid count is the total number of MBSSID elements in
the beacon instead of Max BSSID indicator of the Multiple BSS set.
This will result in drivers obtaining an invalid bssid_indicator for BSSes
in a Multiple BSS set.
Fix this by updating link's bssid_indicator from MBSSID element for
Transmitting BSS and update the same for all of its Non-Transmitting BSSes.
Fixes: dde78aa520 ("mac80211: update bssid_indicator in ieee80211_assign_beacon")
Signed-off-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>
Link: https://patch.msgid.link/20250530040940.3188537-1-rameshkumar.sundaram@oss.qualcomm.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Currently, in multi-radio wiphy cases, if one radio is operating on a DFS
channel, -EBUSY is returned even when a scan is requested on a different
radio. Because of this, an MLD AP with one radio (link) on a DFS channel
and Automatic Channel Selection (ACS) on another radio (link) cannot be
brought up.
In multi-radio wiphy cases, multiple radios are grouped under a single
wiphy. Hence, if a radio is operating on a DFS channel and a scan is
requested on a different radio of the same wiphy, the scan can be allowed
simultaneously without impacting the DFS operations.
Add logic to check the underlying radio used for the requested scan. If the
radio on which DFS is already running is not being used, allow the scan
operation; otherwise, return -EBUSY.
Signed-off-by: Raj Kumar Bhagat <quic_rajkbhag@quicinc.com>
Link: https://patch.msgid.link/20250527-mlo-dfs-acs-v2-3-92c2f37c81d9@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Currently, in multi-radio wiphy cases, if a scan is ongoing on one radio,
-EBUSY is returned when DFS or a channel switch is initiated on another
radio. Because of this, an MLD AP with one radio (link) in an ongoing scan
cannot initiate DFS or a channel switch on another radio (link).
In multi-radio wiphy cases, multiple radios are grouped under a single
wiphy. Hence, if a scan is ongoing on one underlying radio and DFS or a
channel switch is requested on a different underlying radio of the same
wiphy, these operations can be allowed simultaneously.
Add logic to check the underlying radio used for the ongoing scan. If the
radio on which DFS or a channel switch is requested is not being used for
the scan, allow the operation; otherwise, return -EBUSY.
Signed-off-by: Aditya Kumar Singh <aditya.kumar.singh@oss.qualcomm.com>
Co-developed-by: Raj Kumar Bhagat <quic_rajkbhag@quicinc.com>
Signed-off-by: Raj Kumar Bhagat <quic_rajkbhag@quicinc.com>
Link: https://patch.msgid.link/20250527-mlo-dfs-acs-v2-2-92c2f37c81d9@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Add utility API cfg80211_get_radio_idx_by_chan() to retrieve the radio
index corresponding to a given channel in a multi-radio wiphy.
This utility function can be used when we want to check the radio-specific
data for a channel in a multi-radio wiphy. For example, it can help
determine the radio index required to handle a scan request. This index
can then be used to decide whether the scan can proceed without
interfering with ongoing DFS operations on another radio.
Signed-off-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Co-developed-by: Raj Kumar Bhagat <quic_rajkbhag@quicinc.com>
Signed-off-by: Raj Kumar Bhagat <quic_rajkbhag@quicinc.com>
Link: https://patch.msgid.link/20250527-mlo-dfs-acs-v2-1-92c2f37c81d9@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Drivers that support Tx power insertion could examine the outgoing Radio
measurement packet and depending on the packet type, the driver can
insert specific data fields in it. These action field values will help
drivers classify the action code within the Radio Measurement action
packet.
These action fields are defined in IEEE 802.11-2024 - Table 9-470, Radio
Measurement Action field values.
Signed-off-by: Aditya Kumar Singh <aditya.kumar.singh@oss.qualcomm.com>
Link: https://patch.msgid.link/20250528-add_rrm_action_code-v1-1-6b7c78b5bbaf@oss.qualcomm.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Limit rate_idx to IL_LAST_OFDM_RATE for 5GHz band for thinkable case
the index is incorrect.
Reported-by: Fedor Pchelkin <pchelkin@ispras.ru>
Reported-by: Alexei Safin <a.safin@rosa.ru>
Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl>
Reviewed-by: Fedor Pchelkin <pchelkin@ispras.ru>
Link: https://patch.msgid.link/20250525144524.GA172583@wp.pl
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The dev_hold() on skb->dev during packet reception was originally
added to prevent the device from being released prematurely during
asynchronous decryption operations.
As current hardware can offload decryption, this asynchronous path is
not always utilized. This often results in a pattern of dev_hold()
immediately followed by dev_put() for each packet, creating
unnecessary reference counting overhead detrimental to performance.
This patch optimizes this by skipping the dev_hold() and subsequent
dev_put() when asynchronous decryption is not being performed.
Signed-off-by: Jianbo Liu <jianbol@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Positivo P15X is equipped with ALC269VC, and needs a fix to make
the headset mic to work.
Also must to limits the internal microphone boost.
Signed-off-by: Edson Juliano Drosdeck <edson.drosdeck@gmail.com>
Link: https://patch.msgid.link/20250619191215.17203-1-edson.drosdeck@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
A relatively large collection of fixes and updates that came in since
the merge window. Of note are a couple of Cirrus ones which change the
firmware naming for some newly added devices, and a fix from Laurentiu
for issues booting firmwares on the DSPs on i.MX8 SoCs.
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Merge tag 'asoc-fix-v6.16-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v6.16
A relatively large collection of fixes and updates that came in since
the merge window. Of note are a couple of Cirrus ones which change the
firmware naming for some newly added devices, and a fix from Laurentiu
for issues booting firmwares on the DSPs on i.MX8 SoCs.
The usage of the mockdev pointer in struct gpio_device is limited to the
GPIO sysfs code. There's no reason to keep it in this top-level
structure. Create a separate structure containing the reference to the
GPIO device and the dummy class device that will be passed to
device_create_with_groups(). The !gdev->mockdev checks can be removed as
long as we make sure that all operations on the GPIO class are protected
with the sysfs lock.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250610-gpio-sysfs-chip-export-v1-6-a8c7aa4478b1@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
No symbols from the linux/idr.h or linux/spinlock.h headers are used in
this file so remove them. We also don't technically need linux/list.h
currently but one of the follow-up commits will start using it so let's
leave it.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250610-gpio-sysfs-chip-export-v1-5-a8c7aa4478b1@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Update the code to be more consistent with the rest of the codebase.
Mostly correctly align line-breaks, remove unneeded tabs, stray newlines
& spaces and tweak the comment style.
No functional change.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250610-gpio-sysfs-chip-export-v1-4-a8c7aa4478b1@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
While not critical, it's useful to have the corresponding call to
mutex_destroy() whenever we use mutex_init(). Add the call right before
kfreeing the GPIO data.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250610-gpio-sysfs-chip-export-v1-3-a8c7aa4478b1@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Since commit 700cdf7ed0 ("gpio: sysfs: make the sysfs export behavior
consistent"), named GPIO lines are no longer exported in sysfs as links
named after the them. Drop the misleading bit from the ABI docs.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250610-gpio-sysfs-chip-export-v1-1-a8c7aa4478b1@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Enabling the compile test should not cause automatic enabling of all
drivers. Restrict the default to ARCH also for individual driver, even
though its choice is not visible without selecting parent Kconfig
symbol, because otherwise selecting parent would select the child during
compile testing.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250404-kconfig-defaults-clk-v1-3-4d2df5603332@linaro.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Enabling the compile test should not cause automatic enabling of all
drivers. Restrict the default to ARCH also for individual driver, even
though its choice is not visible without selecting parent Kconfig
symbol, because otherwise selecting parent would select the child during
compile testing.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250404-kconfig-defaults-clk-v1-2-4d2df5603332@linaro.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Add kunit test suites clk_hw_get_dev() and clk_hw_get_of_node()
for clocks registered with clk_hw_register() and of_clk_hw_register()
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20250417-clk-hw-get-helpers-v1-2-7743e509612a@baylibre.com
Reviewed-by: Brian Masney <bmasney@redhat.com>
[sboyd@kernel.org: Drop genparams, rename tests, drop inits,
combine suites, add test for non-DT platform device]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Rename clk_register_clk_parent_data_device_driver() to
kunit_of_platform_driver_dev() and have it return a struct device
pointer while accepting a match table. This will be useful to
find the device associated with an OF node for more tests than
only the clk_parent_data tests.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
[sboyd@kernel.org: Split out from next patch, carry SoB and
authorship, rename API, return device pointer]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Documentation/filesystems/sysfs.rst mentions that show() should only
use sysfs_emit() or sysfs_emit_at() when formating the value to be
returned to user space. So replace scnprintf() with sysfs_emit().
Signed-off-by: Chelsy Ratnawat <chelsyratnawat2001@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Add "Thinkpad X1 Tablet Gen 2 Keyboard" PID to hid-lenovo driver to fix trackpoint not working issue.
Signed-off-by: Akira Inoue <niyarium@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Don't populate the read-only array reconnect_event on the stack
at run time, instead make it static const.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
This improves code readability by using the standard
kernel macro for minimal value selection while maintaining identical
functionality.
Signed-off-by: Yu Jiaoliang <yujiaoliang@vivo.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
During appletb_kbd_probe, probe attempts to get the backlight device
by name. When this happens backlight_device_get_by_name looks for a
device in the backlight class which has name "appletb_backlight" and
upon finding a match it increments the reference count for the device
and returns it to the caller. However this reference is never released
leading to a reference leak.
Fix this by decrementing the backlight device reference count on removal
via put_device and on probe failure.
Fixes: 93a0fc4894 ("HID: hid-appletb-kbd: add support for automatic brightness control while using the touchbar")
Cc: stable@vger.kernel.org
Signed-off-by: Qasim Ijaz <qasdev00@gmail.com>
Reviewed-by: Aditya Garg <gargaditya08@live.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Stephen Rothwell reports htmldocs warning:
Documentation/hid/intel-thc-hid.rst:200: ERROR: Unexpected indentation. [docutils]
Separate conditional list for max input size control by a blank line
to fix the warning.
Fixes: 45e92a0930 ("HID: Intel-thc-hid: Intel-thc: Introduce max input size control")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/linux-next/20250611142409.7d4683b0@canb.auug.org.au/
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Reviewed-by: Even Xu <even.xu@intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
in case we have GPIOLIB enabled the gpio pins are used
from the current driver as gpio pins. But may the gpio
functions of this pins are not enabled in the flash
of the chip and so gpio access fails.
In case CONFIG_IIO is not enabled we can prevent this
issue of the driver simply by enabling the gpio mode
for all pins.
Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Document the GPI DMA engine on the sc8280xp platform.
Signed-off-by: Pengyu Luo <mitltlatltl@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250617090032.1487382-2-mitltlatltl@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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Merge tag 'block-6.16-20250619' of git://git.kernel.dk/linux
Pull block fixes from Jens Axboe:
- Two fixes for aoe which fixes issues dating back to when this driver
was converted to blk-mq
- Fix for ublk, checking for valid queue depth and count values before
setting up a device
* tag 'block-6.16-20250619' of git://git.kernel.dk/linux:
ublk: santizize the arguments from userspace when adding a device
aoe: defer rexmit timer downdev work to workqueue
aoe: clean device rq_list in aoedev_downdev()
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Merge tag 'io_uring-6.16-20250619' of git://git.kernel.dk/linux
Pull io_uring fixes from Jens Axboe:
- Two fixes for error injection failures. One fixes a task leak issue
introduced in this merge window, the other an older issue with
handling allocation of a mapped buffer.
- Fix for a syzbot issue that triggers a kmalloc warning on attempting
an allocation that's too large
- Fix for an error injection failure causing a double put of a task,
introduced in this merge window
* tag 'io_uring-6.16-20250619' of git://git.kernel.dk/linux:
io_uring: fix potential page leak in io_sqe_buffer_register()
io_uring/sqpoll: don't put task_struct on tctx setup failure
io_uring: remove duplicate io_uring_alloc_task_context() definition
io_uring: fix task leak issue in io_wq_create()
io_uring/rsrc: validate buffer count with offset for cloning
and reinstates a Kconfig option to control the extra self-tests.
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Merge tag 'v6.16-p5' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
"This fixes a regression in ahash (broken fallback finup) and
reinstates a Kconfig option to control the extra self-tests"
* tag 'v6.16-p5' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: ahash - Fix infinite recursion in ahash_def_finup
crypto: testmgr - reinstate kconfig control over full self-tests
msync and nommu are directly related to memory mapping, mincore is less so
but all are roughly speaking operating on virtual memory mappings from the
point of view of the user so this seems the most appropriate place for
them.
Link: https://lkml.kernel.org/r/20250617144130.147847-1-lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Pedro Falcato <pfalcato@suse.de>
Acked-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jann Horn <jannh@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
These files seem best suited to shmem.
Link: https://lkml.kernel.org/r/20250617161359.166955-1-lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
page_vma_mapped_walk() is used to traverse page tables from a VMA, used by
rmap logic once the reverse mapping has been traversed to the VMA level.
It is also used by other users (migration, damon, etc.) but is primarily
used by the reverse mapping and is a key part of its logic, so it seems
appropriate to place it here.
Link: https://lkml.kernel.org/r/20250617165142.173716-1-lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Rik van Riel <riel@surriel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This file is clearly specific to hugetlb so this seems the most
appropriate place for it.
Link: https://lkml.kernel.org/r/20250617171538.178042-1-lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
These files comprise the bootmem info logic which is initialised on
startup and also memory tests that are run on startup and as such this
seems the most appropriate section for them.
Link: https://lkml.kernel.org/r/20250617174538.188977-1-lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Change my role to Maintainer as I am quite involved in HugeTLB
development, and will be more so with the upcoming HugetLB-pagewalk
unification, so I would like to help Munchun take care of the code.
Besides, having two people will help in offloading some pressure.
Also add David as a Reviewer since he has quite some knowledge in the
field and has already provided valuable feedback.
Link: https://lkml.kernel.org/r/20250617185910.471406-1-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Muchun Song <muchun.song@linux.dev>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Temporarily clear the preallocation flag when explicitly requesting
allocations. Pre-existing allocations are already counted against the
request through mas_node_count_gfp(), but the allocations will not happen
if the MA_STATE_PREALLOC flag is set. This flag is meant to avoid
re-allocating in bulk allocation mode, and to detect issues with
preallocation calculations.
The MA_STATE_PREALLOC flag should also always be set on zero allocations
so that detection of underflow allocations will print a WARN_ON() during
consumption.
User visible effect of this flaw is a WARN_ON() followed by a null pointer
dereference when subsequent requests for larger number of nodes is
ignored, such as the vma merge retry in mmap_region() caused by drivers
altering the vma flags (which happens in v6.6, at least)
Link: https://lkml.kernel.org/r/20250616184521.3382795-3-Liam.Howlett@oracle.com
Fixes: 54a611b605 ("Maple Tree: add new data structure")
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reported-by: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
Reported-by: Hailong Liu <hailong.liu@oppo.com>
Link: https://lore.kernel.org/all/1652f7eb-a51b-4fee-8058-c73af63bacd1@oppo.com/
Link: https://lore.kernel.org/all/20250428184058.1416274-1-Liam.Howlett@oracle.com/
Link: https://lore.kernel.org/all/20250429014754.1479118-1-Liam.Howlett@oracle.com/
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Hailong Liu <hailong.liu@oppo.com>
Cc: zhangpeng.00@bytedance.com <zhangpeng.00@bytedance.com>
Cc: Steve Kang <Steve.Kang@unisoc.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
