Add pin-control devicetree nodes and used them to
explicitly define uSD card interface pin configuration.
Signed-off-by: Ivan T. Ivanov <iivanov@suse.de>
Reviewed-by: Stefan Wahren <wahrenst@gmx.net>
Signed-off-by: Andrea della Porta <andrea.porta@suse.com>
Link: https://lore.kernel.org/r/5ceba8558e0007a9685f19b51d681d0ce79e7634.1756386531.git.andrea.porta@suse.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Select the on-chip pin controller driver for BCM2712 SoC.
On RapsberryPi 5 devices it is primarily needed to operate the
bluetooth and WiFi devices, to configure the uSD interface
and the power button.
Signed-off-by: Andrea della Porta <andrea.porta@suse.com>
Link: https://lore.kernel.org/all/38704a5ab6913845bbf9178170e83004ab3e8fcf.1756372805.git.andrea.porta@suse.com/
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Kernel Test Robot reported a compiler warning - a null pointer may be
passed to memmove in __bpf_dynptr_{read,write} when building without
networking support.
The warning is correct from a static analysis standpoint, but not actually
reachable. Without CONFIG_NET, creating dynptrs to skb metadata is
impossible since the constructor kfunc is missing.
Silence the false-postive diagnostic message by returning an error pointer
from bpf_skb_meta_pointer stub when CONFIG_NET=n.
Fixes: 6877cd392b ("bpf: Enable read/write access to skb metadata through a dynptr")
Closes: https://lore.kernel.org/oe-kbuild-all/202508212031.ir9b3B6Q-lkp@intel.com/
Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20250901-dynptr-skb-meta-no-net-v2-1-ce607fcb6091@cloudflare.com
Now when SRIOV is enabled, PF with multiple queues can only receive
all packets on queue 0. This is caused by an incorrect flag judgement,
which prevents RSS from being enabled.
In fact, RSS is supported for the functions when SRIOV is enabled.
Remove the flag judgement to fix it.
Fixes: c52d4b8989 ("net: libwx: Redesign flow when sriov is enabled")
Cc: stable@vger.kernel.org
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/A3B7449A08A044D0+20250904024322.87145-1-jiawenwu@trustnetic.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The survivability_mode attribute is applicable only for DGFX and
platforms newer than BATTLEMAGE. Use .is_visible() hook to hide
this attribute when above conditions are not met. Remove code that
was trying to fix such configuration during the runtime.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Riana Tauro <riana.tauro@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Link: https://lore.kernel.org/r/20250902131744.5076-4-michal.wajdeczko@intel.com
Implement empty ops.is_visible hook to allow filtering-out any not
supported attributes, as not all of them are applicable on all xe
platforms.
Since during creation of each new configfs directory we are looking
for xe device descriptor to validate that xe driver supports given
PCI device, store reference to that descriptor to allow later use
while doing attribute filtering.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Link: https://lore.kernel.org/r/20250902131744.5076-3-michal.wajdeczko@intel.com
This is a user controlled configfs attribute, we should not
modify that outside the configfs attr.store() implementation.
Fixes: bc417e54e2 ("drm/xe: Enable configfs support for survivability mode")
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Riana Tauro <riana.tauro@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250904103521.7130-1-michal.wajdeczko@intel.com
When printing the deprecation warning for scx_bpf_cpu_rq(), we may hit a
NULL pointer dereference if the kfunc is called before a BPF scheduler
is fully attached, for example, when invoked from a BPF timer or during
ops.init():
[ 50.752775] BUG: kernel NULL pointer dereference, address: 0000000000000331
...
[ 50.764205] RIP: 0010:scx_bpf_cpu_rq+0x30/0xa0
...
[ 50.787661] Call Trace:
[ 50.788398] <TASK>
[ 50.789061] bpf_prog_08f7fd2dcb187aaf_wakeup_timerfn+0x75/0x1a8
[ 50.792477] bpf_timer_cb+0x7e/0x140
[ 50.796003] hrtimer_run_softirq+0x91/0xe0
[ 50.796952] handle_softirqs+0xce/0x3c0
[ 50.799087] run_ksoftirqd+0x3e/0x70
[ 50.800197] smpboot_thread_fn+0x133/0x290
[ 50.802320] kthread+0x115/0x220
[ 50.804984] ret_from_fork+0x17a/0x1d0
[ 50.806920] ret_from_fork_asm+0x1a/0x30
[ 50.807799] </TASK>
Fix this by only printing the warning once the scheduler is fully
registered.
Fixes: 5c48d88fe0 ("sched_ext: deprecation warn for scx_bpf_cpu_rq()")
Cc: Christian Loehle <christian.loehle@arm.com>
Signed-off-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
When no other driver selects CONFIG_VIDEOMODE_HELPERS but
CONFIG_DRM_CDNS_DSI is enabled, there is a linker or modpost error:
ERROR: modpost: "drm_display_mode_to_videomode" [drivers/gpu/drm/bridge/cadence/cdns-dsi.ko] undefined!
Select VIDEOMODE_HELPERS to ensure that this helper function is
available to the driver.
Fixes: ce4bc5ca7c ("drm/bridge: cdns-dsi: Use video mode and clean up cdns_dsi_mode2cfg()")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250821-cdns-videohelpers-v1-1-853e021908cf@kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
The GuC communication protocol allows GuC to send NO_RESPONSE_RETRY
reply message to indicate that due to some interim condition it can
not handle incoming H2G request and the host shall resend it.
But in some cases, due to errors, this unsatisfied condition might
be final and this could lead to endless retries as it was recently
seen on the CI:
[drm] GT0: PF: VF1 FLR didn't finish in 5000 ms (-ETIMEDOUT)
[drm] GT0: PF: VF1 resource sanitizing failed (-ETIMEDOUT)
[drm] GT0: PF: VF1 FLR failed!
[drm:guc_ct_send_recv [xe]] GT0: H2G action 0x5503 retrying: reason 0x0
[drm:guc_ct_send_recv [xe]] GT0: H2G action 0x5503 retrying: reason 0x0
[drm:guc_ct_send_recv [xe]] GT0: H2G action 0x5503 retrying: reason 0x0
[drm:guc_ct_send_recv [xe]] GT0: H2G action 0x5503 retrying: reason 0x0
To avoid such dangerous loops allow only limited number of retries
(for now 50) and add some delays (n * 5ms) to slow down the rate of
resending this repeated request.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Stuart Summers <stuart.summers@intel.com>
Reviewed-by: Julia Filipchuk <julia.filipchuk@intel.com>
Link: https://lore.kernel.org/r/20250903223330.6408-1-michal.wajdeczko@intel.com
The workload hint may contain some other hints which are not defined.
So mask out unsupported types. Currently only lower 4 bits of workload
type hints are defined.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20250828201541.931425-1-srinivas.pandruvada@linux.intel.com
[ rjw: Subject cleanup ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Currently the very common retpoline: "CS CALL __x86_indirect_thunk_r11"
is transformed into "CALL *R11; NOP3" for eIBRS/BHI_NO parts.
Similarly, paranoid fineibt has: "CALL *R11; NOP".
Recognise that CS stuffing can avoid the extra NOP. However, due to
prefix decode penalties, make sure to not emit too many CS prefixes.
Notably: "CS CALL __x86_indirect_thunk_rax" must not become "CS CS CS
CS CALL *RAX". Prefix decode penalties are typically many more cycles
than decoding an extra NOP.
Additionally, if the retpoline is a tail-call, the "JMP *%\reg" should
be followed by INT3 for straight-line-speculation mitigation, since
emit_indirect() now has a length argument, move this into
emit_indirect() such that other users (paranoid-fineibt) also do this.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20250902104627.GM4068168@noisy.programming.kicks-ass.net
A while ago [0] FineIBT started using the 0xEA instruction to raise #UD.
All existing parts will generate #UD in 64bit mode on that instruction.
However; Intel/AMD have not blessed using this instruction, it is on
their 'reserved' opcode list for future use.
Peter Anvin worked the committees and got use of 0xD6 blessed, it
shall be called UDB (per the next SDM or so), and it being a single
byte instruction is easy to slip into a single byte immediate -- as
is done by this very patch.
Reworking the FineIBT code to use UDB wasn't entirely trivial. Notably
the FineIBT-BHI1 case ran out of bytes. In order to condense the
encoding some it was required to move the hash register from R10D to
EAX (thanks hpa!).
Per the x86_64 ABI, RAX is used to pass the number of vector registers
for vararg function calls -- something that should not happen in the
kernel. More so, the kernel is built with -mskip-rax-setup, which
should leave RAX completely unused, allowing its re-use.
[ For BPF; while the bpf2bpf tail-call uses RAX in its calling
convention, that does not use CFI and is unaffected. Only the
'regular' C->BPF transition is covered by CFI. ]
The ENDBR poison value is changed from 'OSP NOP3' to 'NOPL -42(%RAX)',
this is basically NOP4 but with UDB as its immediate. As such it is
still a non-standard NOP value unique to prior ENDBR sites, but now
also provides UDB.
Per Agner Fog's optimization guide, Jcc is assumed not-taken. That is,
the expected path should be the fallthrough case for improved
throughput.
Since the preamble now relies on the ENDBR poison to provide UDB, the
code is changed to write the poison right along with the initial
preamble -- this is possible because the ITS mitigation already
disabled IBT over rewriting the CFI scheme.
The scheme in detail:
Preamble:
FineIBT FineIBT-BHI1 FineIBT-BHI
__cfi_\func: __cfi_\func: __cfi_\func:
endbr endbr endbr
subl $0x12345678, %eax subl $0x12345678, %eax subl $0x12345678, %eax
jne.d32,np \func+3 cmovne %rax, %rdi cs cs call __bhi_args_N
jne.d8,np \func+3
\func: \func: \func:
nopl -42(%rax) nopl -42(%rax) nopl -42(%rax)
Notably there are 7 bytes available after the SUBL; this enables the
BHI1 case to fit without the nasty overlapping case it had previously.
The !BHI case uses Jcc.d32,np to consume all 7 bytes without the need
for an additional NOP, while the BHI case uses CS padding to align the
CALL with the end of the preamble such that it returns to \func+0.
Caller:
FineIBT Paranoid-FineIBT
fineibt_caller: fineibt_caller:
mov $0x12345678, %eax mov $0x12345678, %eax
lea -10(%r11), %r11 cmp -0x11(%r11), %eax
nop5 cs lea -0x10(%r11), %r11
retpoline: retpoline:
cs call __x86_indirect_thunk_r11 jne fineibt_caller+0xd
call *%r11
nop
Notably this is before apply_retpolines() which will fix up the
retpoline call -- since all parts with IBT also have eIBRS (lets
ignore ITS). Typically the retpoline site is rewritten (when still
intact) into:
call *%r11
nop3
[0] 06926c6cdb ("x86/ibt: Optimize the FineIBT instruction sequence")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20250901191307.GI4067720@noisy.programming.kicks-ass.net
Commit 66f793099a ("x86/retpoline: Avoid retpolines for built-in __init
functions") disabled retpolines in __init sections (__noinitretpoline)
as a precaution against potential issues with retpolines in early boot,
but it has not been a problem in practice (i.e. see Clang below).
Commit 87358710c1 ("x86/retpoline: Support retpoline builds with Clang")
narrowed this to only GCC, as Clang doesn't have per-function control
over retpoline emission. As such, Clang has been booting with retpolines
in __init since retpoline support was introduced.
Clang KCFI has been instrumenting __init since CFI was introduced.
With the introduction of KCFI for GCC, KCFI instrumentation with
retpolines disabled means that objtool does not construct .retpoline_sites
section entries for the non-retpoline KCFI calls. At boot, the KCFI
rehashing code, via __apply_fineibt(), misses all __init KCFI calls
(since they are not retpolines), resulting in immediate hash mismatches:
all preambles are rehashed (via .cfi_sites) and none of the __init call
sites are rehashed.
Remove __noinitretpoline since it provides no meaningful utility and
creates problems with CFI. Additionally remove __noretpoline since it
is now unused.
Alternatively, cfi_rand_callers() could walk the .kcfi_traps section which
is exactly the list of KCFI instrumentation sites. But it seems better to
have as few differences in common instruction sequences between compilers
as possible, so better to remove the special handling of retpolines in
__init for GCC.
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250904034656.3670313-6-kees@kernel.org
Add "debug" option for "cfi=" bootparam to get details on early CFI
initialization steps so future Kees can find breakage easier.
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250904034656.3670313-5-kees@kernel.org
Use a regular "CFI:" prefix for CFI reports during alternatives setup,
including reporting when nothing has happened (i.e. CONFIG_FINEIBT=n).
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20250904034656.3670313-4-kees@kernel.org
The kernel-parameters.txt didn't have a section for the cfi= options.
Add it.
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20250904034656.3670313-3-kees@kernel.org
Just a nit-picky change to the KCFI indirect call check instruction
documentation. The addl offset isn't always -4 (it depends on patchable
function entry configuration).
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250904034656.3670313-2-kees@kernel.org
Prepare for GCC KCFI support and move the __nocfi attribute from
compiler-clang.h to compiler_types.h. This was already gated by
CONFIG_CFI_CLANG, so this remains safe for non-KCFI GCC builds.
Signed-off-by: Kees Cook <kees@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20250904034656.3670313-1-kees@kernel.org
The current behavior of the Step-wise thermal governor is to increase
the cooling level one step at a time after trip point threshold passing
by thermal zone temperature until the temperature stops to rise. Then,
nothing is done until the temperature decreases below the (possibly
updated) trip point threshold, at which point the cooling level is
reduced straight to the applicable minimum.
While this generally works, it is not in agreement with the throttling
logic description comment in step_wise_manage() any more after some
relatively recent changes, and in the case of passive cooling, it may
lead to undesirable performance oscillations between high and low
levels.
For this reason, modify the governor's cooling device state selection
function, get_target_state(), to reduce cooling by one level even if
the temperature is still above the thermal zone threshold, but the
temperature has started to fall down. However, ensure that the cooling
level will remain above the applicable minimum in that case to pull
the zone temperature further down, possibly until it falls below the
trip threshold (which may now be equal to the low temperature of the
trip).
Doing so should help higher performance to be restored earlier in some
cases which is desirable especially for passive trip points with
relatively high hysteresis values.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://patch.msgid.link/1947735.tdWV9SEqCh@rafael.j.wysocki
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The cooling logic description comment next to the get_target_state()
definition is slightly ambiguous in what it means by "lower cooling
state", so clarify that by replacing the ambuguous phrase with "the
minimum applicable cooling state".
No functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://patch.msgid.link/4690596.LvFx2qVVIh@rafael.j.wysocki
Make the initialization of local variable throttle in
thermal_zone_trip_update() more straightforward.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://patch.msgid.link/6203592.lOV4Wx5bFT@rafael.j.wysocki
Absolute majority of callers are passing the 4th argument equal to
strlen() of the 3rd one.
Drop the v_size argument, add vfs_parse_fs_qstr() for the cases that
want independent length.
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Move pm_wakeup_clear() to the same location as other functions that do
bookkeeping prior to suspend_prepare().
Since calling pm_wakeup_clear() is a prerequisite to setting up for
suspend and enabling functionalities of suspend (like aborting during
suspend), moving pm_wakeup_clear() higher up the call stack makes its
intent more clear and obvious that it is called prior to
suspend_prepare().
After this change, there is a slightly larger window when abort events
can be registered, but otherwise suspend functionality is the same.
Suggested-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Samuel Wu <wusamuel@google.com>
Link: https://patch.msgid.link/20250821004237.2712312-2-wusamuel@google.com
Reviewed-by: Saravana Kannan <saravanak@google.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
- Add support to find OPP for a set of keys (Krishna Chaitanya Chundru).
- Minor optimization to OPP Rust implementation (Onur Özkan).
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Merge tag 'opp-updates-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm
Merge OPP (operating performance points) updates for 6.18 from Viresh
Kumar:
"- Add support to find OPP for a set of keys (Krishna Chaitanya Chundru).
- Minor optimization to OPP Rust implementation (Onur Özkan)."
* tag 'opp-updates-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
OPP: Add support to find OPP for a set of keys
rust: opp: use to_result for error handling
Remove unused 'elf' and 'path' parameters from parse_usdt_note function
signature. These parameters are not referenced within the function body
and only add unnecessary complexity.
The function only requires the note header, data buffer, offsets, and
output structure to perform USDT note parsing.
Update function declaration, definition, and the single call site in
collect_usdt_targets() to match the simplified signature.
This is a safe internal cleanup as parse_usdt_note is a static function.
Signed-off-by: Jiawei Zhao <phoenix500526@163.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/bpf/20250904030525.1932293-1-phoenix500526@163.com
Merge series from Charles Keepax <ckeepax@opensource.cirrus.com>:
Just some minor SDCA bug fixes and some minor structure reordering to
improve the padding.
Convert the ASpeed GFX Display Controller binding to DT schema format.
There was a duplicate, incomplete binding in mfd which can be dropped.
Add the missing 'aspeed,ast2600-gfx' compatible and 'syscon' property.
Reviewed-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Link: https://lore.kernel.org/r/20250829230442.1495926-1-robh@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Just like the other Vivobooks here, the N6506CU has its keyboard IRQ
described as ActiveLow in the DSDT, which the kernel overrides to
EdgeHigh, causing the internal keyboard not to work.
Add the N6506CU to the irq1_level_low_skip_override[] quirk table to fix
this.
Signed-off-by: Sam van Kampen <sam@tehsvk.net>
Link: https://patch.msgid.link/20250829145221.2294784-2-sam@tehsvk.net
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Some x86/ACPI laptops with MIPI cameras have a INTC10DE or INTC10E0 ACPI
device in the _DEP dependency list of the ACPI devices for the camera-
sensors (which have flags.honor_deps set).
These devices are for an Intel Vision CVS chip for which an out of tree
driver is available [1].
The camera sensor works fine without a driver being loaded for this
ACPI device on the 2 laptops this was tested on:
ThinkPad X1 Carbon Gen 12 (Meteor Lake)
ThinkPad X1 2-in-1 Gen 10 (Arrow Lake)
For now add these HIDs to acpi_ignore_dep_ids[] so that
acpi_dev_ready_for_enumeration() will return true once the other _DEP
dependencies are met and an i2c_client for the camera sensor will get
instantiated.
Link: https://github.com/intel/vision-drivers/ [1]
Signed-off-by: Hans de Goede <hansg@kernel.org>
Link: https://patch.msgid.link/20250829142748.21089-1-hansg@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Both acpi_fan_has_fst() and acpi_fan_is_acpi4() are called from one
place only, so fold them both into there caller which yields slightly
leaner code that is somewhat easier to follow.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/3386797.aeNJFYEL58@rafael.j.wysocki
The second argument of acpi_bus_update_power() can be NULL, so drop the
power_state dummy local variable in acpi_thermal_resume() used just for
avoiding passing NULL as the second argument to that function.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/13851842.uLZWGnKmhe@rafael.j.wysocki
While a BH work item is canceled, the core code spins until it
determines that the item completed. On PREEMPT_RT the spinning relies on
a lock in local_bh_disable() to avoid a live lock if the canceling
thread has higher priority than the BH-worker and preempts it. This lock
ensures that the BH-worker makes progress by PI-boosting it.
This lock in local_bh_disable() is a central per-CPU BKL and about to be
removed.
To provide the required synchronisation add a per pool lock. The lock is
acquired by the bh_worker at the begin while the individual callbacks
are invoked. To enforce progress in case of interruption, __flush_work()
needs to acquire the lock.
This will flush all BH-work items assigned to that pool.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
cgroup_subsys::post_attach callback was introduced in commit 5cf1cacb49
("cgroup, cpuset: replace cpuset_post_attach_flush() with
cgroup_subsys->post_attach callback") and only cpuset would use this
callback to wait for the mm migration to complete at the end of
__cgroup_procs_write(). Since the previous patch defer the flush operation
until returning to userspace, no one use this callback now. Remove this
callback from cgroup_subsys.
Signed-off-by: Chuyi Zhou <zhouchuyi@bytedance.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Now in cpuset_attach(), we need to synchronously wait for
flush_workqueue to complete. The execution time of flushing
cpuset_migrate_mm_wq depends on the amount of mm migration initiated by
cpusets at that time. When the cpuset.mems of a cgroup occupying a large
amount of memory is modified, it may trigger extensive mm migration,
causing cpuset_attach() to block on flush_workqueue for an extended period.
This could be dangerous because cpuset_attach() is within the critical
section of cgroup_mutex, which may ultimately cause all cgroup-related
operations in the system to be blocked.
This patch attempts to defer the flush_workqueue() operation until
returning to userspace using the task_work which is originally proposed by
tejun[1], so that flush happens after cgroup_mutex is dropped. That way we
maintain the operation synchronicity while avoiding bothering anyone else.
[1]: https://lore.kernel.org/cgroups/ZgMFPMjZRZCsq9Q-@slm.duckdns.org/T/#m117f606fa24f66f0823a60f211b36f24bd9e1883
Originally-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Chuyi Zhou <zhouchuyi@bytedance.com>
Reviewed-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
It is unnecessary to always wait for the flush operation of
cpuset_migrate_mm_wq to complete in cpuset_write_resmask, as modifying
cpuset.cpus or cpuset.exclusive does not trigger mm migrations. The
flush_workqueue can be executed only when cpuset.mems is modified.
Signed-off-by: Chuyi Zhou <zhouchuyi@bytedance.com>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Reviewed-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
When the 3.3Vaux supply is present, fetch it at the probe time and keep it
enabled for the entire PCIe controller lifecycle so that the link can enter
L2 state and the devices can signal wakeup using either Beacon or WAKE#
mechanisms.
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
[mani: reworded the subject, description and error message]
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20250820022328.2143374-1-hongxing.zhu@nxp.com
Merge series from Charles Keepax <ckeepax@opensource.cirrus.com>:
cs42l43 uses pm_runtime_force_suspend() during system suspend, however
this means care must be taken that IRQ handler code isn't running when
entering system suspend as force suspend will ignore that the handler
is holding a pm reference. Typically the result of this is just a few
error messages, but better to improve the handling and ensure that all
IRQ processing is synchronised in before system suspend.
Merge series from Jihed Chaibi <jihed.chaibi.dev@gmail.com>:
The series adds pin names for the es8316, wm8960, and nau8825
codecs to their respective binding files to improve the user
experience for board developers.
We're reverting the removal of a Sundance driver, a user has appeared.
This makes the PR rather large in terms of LoC.
There's a conspicuous absence of real, user-reported 6.17 issues.
Slightly worried that the summer distracted people from testing.
Previous releases - regressions:
- ax25: properly unshare skbs in ax25_kiss_rcv()
Previous releases - always broken:
- phylink: disable autoneg for interfaces that have no inband,
fix regression on pcs-lynx (NXP LS1088)
- vxlan: fix null-deref when using nexthop objects
- batman-adv: fix OOB read/write in network-coding decode
- icmp: icmp_ndo_send: fix reversing address translation for replies
- tcp: fix socket ref leak in TCP-AO failure handling for IPv6
- mctp:
- mctp_fraq_queue should take ownership of passed skb
- usb: initialise mac header in RX path, avoid WARN
- wifi: mac80211: do not permit 40 MHz EHT operation on 5/6 GHz,
respect device limitations
- wifi: wilc1000: avoid buffer overflow in WID string configuration
- wifi: mt76:
- fix regressions from mt7996 MLO support rework
- fix offchannel handling issues on mt7996
- fix multiple wcid linked list corruption issues
- mt7921: don't disconnect when AP requests switch to a channel which
requires radar detection
- mt7925u: use connac3 tx aggr check in tx complete
- wifi: intel:
- improve validation of ACPI DSM data
- cfg: restore some 1000 series configs
- wifi: ath:
- ath11k: a fix for GTK rekeying
- ath12k: a missed WiFi7 capability (multi-link EMLSR)
- eth: intel:
- ice: fix races in "low latency" firmware interface for Tx timestamps
- idpf: set mac type when adding and removing MAC filters
- i40e: remove racy read access to some debugfs files
Misc:
- Revert "eth: remove the DLink/Sundance (ST201) driver"
- netfilter: conntrack: helper: Replace -EEXIST by -EBUSY, avoid confusing
modprobe
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-6.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from netfilter, wireless and Bluetooth.
We're reverting the removal of a Sundance driver, a user has appeared.
This makes the PR rather large in terms of LoC.
There's a conspicuous absence of real, user-reported 6.17 issues.
Slightly worried that the summer distracted people from testing.
Previous releases - regressions:
- ax25: properly unshare skbs in ax25_kiss_rcv()
Previous releases - always broken:
- phylink: disable autoneg for interfaces that have no inband, fix
regression on pcs-lynx (NXP LS1088)
- vxlan: fix null-deref when using nexthop objects
- batman-adv: fix OOB read/write in network-coding decode
- icmp: icmp_ndo_send: fix reversing address translation for replies
- tcp: fix socket ref leak in TCP-AO failure handling for IPv6
- mctp:
- mctp_fraq_queue should take ownership of passed skb
- usb: initialise mac header in RX path, avoid WARN
- wifi: mac80211: do not permit 40 MHz EHT operation on 5/6 GHz,
respect device limitations
- wifi: wilc1000: avoid buffer overflow in WID string configuration
- wifi: mt76:
- fix regressions from mt7996 MLO support rework
- fix offchannel handling issues on mt7996
- fix multiple wcid linked list corruption issues
- mt7921: don't disconnect when AP requests switch to a channel
which requires radar detection
- mt7925u: use connac3 tx aggr check in tx complete
- wifi: intel:
- improve validation of ACPI DSM data
- cfg: restore some 1000 series configs
- wifi: ath:
- ath11k: a fix for GTK rekeying
- ath12k: a missed WiFi7 capability (multi-link EMLSR)
- eth: intel:
- ice: fix races in "low latency" firmware interface for Tx timestamps
- idpf: set mac type when adding and removing MAC filters
- i40e: remove racy read access to some debugfs files
Misc:
- Revert "eth: remove the DLink/Sundance (ST201) driver"
- netfilter: conntrack: helper: Replace -EEXIST by -EBUSY, avoid
confusing modprobe"
* tag 'net-6.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (99 commits)
phy: mscc: Stop taking ts_lock for tx_queue and use its own lock
selftest: net: Fix weird setsockopt() in bind_bhash.c.
MAINTAINERS: add Sabrina to TLS maintainers
gve: update MAINTAINERS
ppp: fix memory leak in pad_compress_skb
net: xilinx: axienet: Add error handling for RX metadata pointer retrieval
net: atm: fix memory leak in atm_register_sysfs when device_register fail
netfilter: nf_tables: Introduce NFTA_DEVICE_PREFIX
selftests: netfilter: fix udpclash tool hang
ax25: properly unshare skbs in ax25_kiss_rcv()
mctp: return -ENOPROTOOPT for unknown getsockopt options
net/smc: Remove validation of reserved bits in CLC Decline message
ipv4: Fix NULL vs error pointer check in inet_blackhole_dev_init()
net: thunder_bgx: decrement cleanup index before use
net: thunder_bgx: add a missing of_node_put
net: phylink: move PHY interrupt request to non-fail path
net: lockless sock_i_ino()
tools: ynl-gen: fix nested array counting
wifi: wilc1000: avoid buffer overflow in WID string configuration
wifi: cfg80211: sme: cap SSID length in __cfg80211_connect_result()
...
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Merge tag 'slab-for-6.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
Pull slab fixes from Vlastimil Babka:
- Stable fix to make slub_debug code not access invalid pointers in the
process of reporting issues (Li Qiong)
- Stable fix to make object tracking pass gfp flags to stackdepot to
avoid deadlock in contexts that can't even wake up kswapd due to e.g.
timers debugging enabled (yangshiguang)
* tag 'slab-for-6.17-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
mm: slub: avoid wake up kswapd in set_track_prepare
mm/slub: avoid accessing metadata when pointer is invalid in object_err()
