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This function does not need a mutable reference to its argument.
Signed-off-by: Daniel Zahka <daniel.zahka@gmail.com>
Link: https://patch.msgid.link/20250918155205.2197603-2-daniel.zahka@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Notice that acpi_processor_power_init() and acpi_processor_power_exit()
don't need to return any values because their callers don't check them
anyway, so redefine those functions as void.
While at it, rearrange the code in acpi_processor_power_init() to
reduce the indentation level, get rid of a redundant local variable
in that function, and rephrase a code comment in it.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
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Add small helpers (drm_dp_post_lt_adj_req_supported() and
drm_dp_post_lt_adj_req_in_progress()) to help with implementing
the POST_LT_ADJ_REQ sequence.
Tested-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250718120154.15492-3-ville.syrjala@linux.intel.com
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Add the bit definitions needed for POST_LT_ADJ sequence.
v2: DP_POST_LT_ADJ_REQ_IN_PROGRESS is bit 1 not 5 (Jani)
Tested-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250718120154.15492-2-ville.syrjala@linux.intel.com
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Pull io_uring fixes from Jens Axboe:
- Fix for a regression introduced in the io-wq worker creation logic.
- Remove the allocation cache for the msg_ring io_kiocb allocations. I
have a suspicion that there's a bug there, and since we just fixed
one in that area, let's just yank the use of that cache entirely.
It's not that important, and it kills some code.
- Treat a closed ring like task exiting in that any requests that
trigger post that condition should just get canceled. Doesn't fix any
real issues, outside of having tasks being able to rely on that
guarantee.
- Fix for a bug in the network zero-copy notification mechanism, where
a comparison for matching tctx/ctx for notifications was buggy in
that it didn't correctly compare with the previous notification.
* tag 'io_uring-6.17-20250919' of git://git.kernel.dk/linux:
io_uring: fix incorrect io_kiocb reference in io_link_skb
io_uring/msg_ring: kill alloc_cache for io_kiocb allocations
io_uring: include dying ring in task_work "should cancel" state
io_uring/io-wq: fix `max_workers` breakage and `nr_workers` underflow
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git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm
Pull pmdomain fixes from Ulf Hansson:
"pmdomain core:
- Restore behaviour for disabling unused PM domains and introduce the
GENPD_FLAG_NO_STAY_ON configuration bit
pmdomain providers:
- renesas: Don't keep unused PM domains powered-on
- rockchip: Fix regulator dependency with GENPD_FLAG_NO_STAY_ON"
* tag 'pmdomain-v6.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm:
pmdomain: renesas: rmobile-sysc: Don't keep unused PM domains powered-on
pmdomain: renesas: rcar-gen4-sysc: Don't keep unused PM domains powered-on
pmdomain: renesas: rcar-sysc: Don't keep unused PM domains powered-on
pmdomain: rockchip: Fix regulator dependency with GENPD_FLAG_NO_STAY_ON
pmdomain: core: Restore behaviour for disabling unused PM domains
pmdomain: renesas: rcar-sysc: Make rcar_sysc_onecell_np __initdata
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
"This fixes a NULL pointer dereference in ccp and a couple of bugs in
the af_alg interface"
* tag 'v6.17-p3' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg
crypto: af_alg - Set merge to zero early in af_alg_sendmsg
crypto: ccp - Always pass in an error pointer to __sev_platform_shutdown_locked()
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Converting bpf_insn_successors() to use lookup table makes it ~1.5
times faster.
Also remove unnecessary conditionals:
- `idx + 1 < prog->len` is unnecessary because after check_cfg() all
jump targets are guaranteed to be within a program;
- `i == 0 || succ[0] != dst` is unnecessary because any client of
bpf_insn_successors() can handle duplicate edges:
- compute_live_registers()
- compute_scc()
Moving bpf_insn_successors() to liveness.c allows its inlining in
liveness.c:__update_stack_liveness().
Such inlining speeds up __update_stack_liveness() by ~40%.
bpf_insn_successors() is used in both verifier.c and liveness.c.
perf shows such move does not negatively impact users in verifier.c,
as these are executed only once before main varification pass.
Unlike __update_stack_liveness() which can be triggered multiple
times.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20250918-callchain-sensitive-liveness-v3-10-c3cd27bacc60@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Remove register chain based liveness tracking:
- struct bpf_reg_state->{parent,live} fields are no longer needed;
- REG_LIVE_WRITTEN marks are superseded by bpf_mark_stack_write()
calls;
- mark_reg_read() calls are superseded by bpf_mark_stack_read();
- log.c:print_liveness() is superseded by logging in liveness.c;
- propagate_liveness() is superseded by bpf_update_live_stack();
- no need to establish register chains in is_state_visited() anymore;
- fix a bunch of tests expecting "_w" suffixes in verifier log
messages.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20250918-callchain-sensitive-liveness-v3-9-c3cd27bacc60@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Unlike the new algorithm, register chain based liveness tracking is
fully path sensitive, and thus should be strictly more accurate.
Validate the new algorithm by signaling an error whenever it considers
a stack slot dead while the old algorithm considers it alive.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20250918-callchain-sensitive-liveness-v3-8-c3cd27bacc60@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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This commit adds a flow-sensitive, context-sensitive, path-insensitive
data flow analysis for live stack slots:
- flow-sensitive: uses program control flow graph to compute data flow
values;
- context-sensitive: collects data flow values for each possible call
chain in a program;
- path-insensitive: does not distinguish between separate control flow
graph paths reaching the same instruction.
Compared to the current path-sensitive analysis, this approach trades
some precision for not having to enumerate every path in the program.
This gives a theoretical capability to run the analysis before main
verification pass. See cover letter for motivation.
The basic idea is as follows:
- Data flow values indicate stack slots that might be read and stack
slots that are definitely written.
- Data flow values are collected for each
(call chain, instruction number) combination in the program.
- Within a subprogram, data flow values are propagated using control
flow graph.
- Data flow values are transferred from entry instructions of callee
subprograms to call sites in caller subprograms.
In other words, a tree of all possible call chains is constructed.
Each node of this tree represents a subprogram. Read and write marks
are collected for each instruction of each node. Live stack slots are
first computed for lower level nodes. Then, information about outer
stack slots that might be read or are definitely written by a
subprogram is propagated one level up, to the corresponding call
instructions of the upper nodes. Procedure repeats until root node is
processed.
In the absence of value range analysis, stack read/write marks are
collected during main verification pass, and data flow computation is
triggered each time verifier.c:states_equal() needs to query the
information.
Implementation details are documented in kernel/bpf/liveness.c.
Quantitative data about verification performance changes and memory
consumption is in the cover letter.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20250918-callchain-sensitive-liveness-v3-6-c3cd27bacc60@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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The next patch would require doing postorder traversal of individual
subprograms. Facilitate this by moving env->cfg.insn_postorder
computation from check_cfg() to a separate pass, as check_cfg()
descends into called subprograms (and it needs to, because of
merge_callee_effects() logic).
env->cfg.insn_postorder is used only by compute_live_registers(),
this function does not track cross subprogram dependencies,
thus the change does not affect it's operation.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20250918-callchain-sensitive-liveness-v3-5-c3cd27bacc60@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Namely, rename the following functions and add prototypes to
bpf_verifier.h:
- find_containing_subprog -> bpf_find_containing_subprog
- insn_successors -> bpf_insn_successors
- calls_callback -> bpf_calls_callback
- fmt_stack_mask -> bpf_fmt_stack_mask
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20250918-callchain-sensitive-liveness-v3-4-c3cd27bacc60@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Prepare for bpf_reg_state->live field removal by introducing a
separate flag to track if clean_verifier_state() had been applied to
the state. No functional changes.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20250918-callchain-sensitive-liveness-v3-1-c3cd27bacc60@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of small fixes. The volume became higher than wished, but
nothing really stands out -- all small, nice and smooth.
A slightly large change is found in qcom USB-audio offload stuff, but
this is a regression fix specific to this device, hence it should be
safe to apply at this late stage.
- Various small fixes for ASoC Cirrus, Realtek, lpass, Intel and
Qualcomm drivers
- ASoC SoundWire fixes
- A few TAS2781 HD-audio side-codec driver fixes
- A fix for Qualcomm USB-audio offload breakage
- Usual a few HD-audio quirks"
* tag 'sound-6.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (35 commits)
ALSA: hda/realtek: Fix mute led for HP Laptop 15-dw4xx
ALSA: hda: intel-dsp-config: Prevent SEGFAULT if ACPI_HANDLE() is NULL
ALSA: usb: qcom: Fix false-positive address space check
ASoC: rt5682s: Adjust SAR ADC button mode to fix noise issue
ASoC: Intel: PTL: Add entry for HDMI-In capture support to non-I2S codec boards.
ASoC: amd: acp: Fix incorrect retrival of acp_chip_info
ASoC: Intel: sof_sdw: use PRODUCT_FAMILY for Fatcat series
ASoC: qcom: sc8280xp: Fix sound card driver name match data for QCS8275
ALSA: hda/realtek: Fix volume control on Lenovo Thinkbook 13x Gen 4
ALSA: hda/realtek: Support Lenovo Thinkbook 13x Gen 5
ALSA: hda: cs35l41: Support Lenovo Thinkbook 13x Gen 5
ALSA: hda/realtek: Add ALC295 Dell TAS2781 I2C fixup
ALSA: hda/tas2781: Fix a potential race condition that causes a NULL pointer in case no efi.get_variable exsits
ASoC: qcom: sc8280xp: Enable DAI format configuration for MI2S interfaces
ASoC: qcom: q6apm-lpass-dais: Fix missing set_fmt DAI op for I2S
ASoC: qcom: audioreach: Fix lpaif_type configuration for the I2S interface
ASoC: Intel: catpt: Expose correct bit depth to userspace
ALSA: hda/tas2781: Fix the order of TAS2781 calibrated-data
ASoC: codecs: lpass-wsa-macro: Fix speaker quality distortion
ASoC: codecs: lpass-rx-macro: Fix playback quality distortion
...
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Make it easier to grep and rename to ns_count.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Stop accessing ns.count directly.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Stop accessing ns.count directly.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Stop accessing ns.count directly.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Stop accessing ns.count directly.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Stop accessing ns.count directly.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Stop accessing ns.count directly.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Stop accessing ns.count directly.
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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And drop ns_free_inum(). Anything common that can be wasted centrally
should be wasted in the new common helper.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Merge series from Dharma Balasubiramani <dharma.b@microchip.com>:
This patch series adds support for SAM9X7 and sama7d65 QSPI controller
along with the SoC-specific capabilities.
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Merge series from Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>:
All the Qualcomm WCD codecs and WCD based codecs have lots of code in
common, resulting in lot of duplicate code.
This series is an attempt to clean some of this by moving the common
code to wcd-common library or to soundwire helper functions.
Currently I have done cleanups for 4 codecs wcd934x, wcd937x, wcd938x
and wcd939x, however any new Qualcomm codecs can avoid this duplication
by using the wcd-common library.
I have also added two helpers of_sdw_find_device_by_node() and
sdw_slave_get_current_bank() in soundwire layer for the codecs to use them,
this series was already acked by Soundwire maintainer Vinod.
As original cleanup series was depending on the new soundwire interfaces
I have combined both the series as they are cleaning up code
duplications.
As am touching the same codec drivers, 2 bug fixes are also added at the
start of the series.
There is still lot of code that is duplicate, but this is just a
starting point for such cleanups.
I have tested this on T14s, any testing is appreciated.
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Since addition of raw opus codec support we need to update
compress API minor version by one.
Bump the SNDRV_COMPRESS_VERSION to 0.4.1.
Signed-off-by: Alexey Klimov <alexey.klimov@linaro.org>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Adds a raw opus codec define and raw opus decoder structs.
This is for raw OPUS packets not packed in any type of container
(for instance OGG container). The decoder struct fields are
taken from corresponding RFC document: RFC 7845 Section 5.
Cc: Srinivas Kandagatla <srini@kernel.org>
Cc: Vinod Koul <vkoul@kernel.org>
Co-developed-by: Annemarie Porter <annemari@quicinc.com>
Signed-off-by: Annemarie Porter <annemari@quicinc.com>
Signed-off-by: Alexey Klimov <alexey.klimov@linaro.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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There's a lot of information that namespace implementers don't need to
know about at all. Encapsulate this all in the initialization helper.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Add an inode number anonymous namespaces.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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We have dedicated headers for all namespace types. Add one for the
cgroup namespace as well. Now it's consistent for all namespace types
and easy to figure out what to include.
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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It's really awkward spilling the ns common infrastructure into multiple
headers. Move it to a separate file.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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There's various scenarios where we need to know whether we are in the
initial set of namespaces or not to e.g., shortcut permission checking.
All namespaces expose that information. Let's do that too.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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We have dedicated headers for all namespace types. Add one for the uts
namespace as well. Now it's consistent for all namespace types.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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The mount namespace has supported id retrieval for a while already.
Add support for the other types as well.
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Pidfd file handles are exhaustive meaning they don't require a handle on
another pidfd to pass to open_by_handle_at() so it can derive the
filesystem to decode in. Instead it can be derived from the file
handle itself. The same is possible for namespace file handles.
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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A while ago we added support for file handles to pidfs so pidfds can be
encoded and decoded as file handles. Userspace has adopted this quickly
and it's proven very useful. Implement file handles for namespaces as
well.
A process is not always able to open /proc/self/ns/. That requires
procfs to be mounted and for /proc/self/ or /proc/self/ns/ to not be
overmounted. However, userspace can always derive a namespace fd from
a pidfd. And that always works for a task's own namespace.
There's no need to introduce unnecessary behavioral differences between
/proc/self/ns/ fds, pidfd-derived namespace fds, and file-handle-derived
namespace fds. So namespace file handles are always decodable if the
caller is located in the namespace the file handle refers to.
This also allows a task to e.g., store a set of file handles to its
namespaces in a file on-disk so it can verify when it gets rexeced that
they're still valid and so on. This is akin to the pidfd use-case.
Or just plainly for namespace comparison reasons where a file handle to
the task's own namespace can be easily compared against others.
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Add a helper to easily check whether a given namespace is the caller's
current namespace. This is currently open-coded in a lot of places.
Simply switch on the type and compare the results.
Reviewed-by: Aleksa Sarai <cyphar@cyphar.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Every namespace type has a container_of(ns, <ns_type>, ns) static inline
function that is currently not exposed in the header. So we have a bunch
of places that open-code it via container_of(). Move it to the headers
so we can use it directly.
Reviewed-by: Aleksa Sarai <cyphar@cyphar.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Support the generic ns lookup infrastructure to support file handles for
namespaces.
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Bring in the fix for removing a mount namespace from the mount namespace
rbtree and list.
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Move the namespace iteration infrastructure originally introduced for
mount namespaces into a generic library usable by all namespace types.
Signed-off-by: Christian Brauner <brauner@kernel.org>
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It's now unused.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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No point in cargo-culting the same code across all the different types.
Use one common initializer.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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And move the stuff out from proc_ns.h where it really doesn't belong.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Move the helper to ns_common.h where it belongs.
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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Add trace_inode_switch_wbs_queue tracepoint to allow insight into how
many inodes are queued to switch their bdi_writeback structure.
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
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There can be multiple inode switch works that are trying to switch
inodes to / from the same wb. This can happen in particular if some
cgroup exits which owns many (thousands) inodes and we need to switch
them all. In this case several inode_switch_wbs_work_fn() instances will
be just spinning on the same wb->list_lock while only one of them makes
forward progress. This wastes CPU cycles and quickly leads to softlockup
reports and unusable system.
Instead of running several inode_switch_wbs_work_fn() instances in
parallel switching to the same wb and contending on wb->list_lock, run
just one work item per wb and manage a queue of isw items switching to
this wb.
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
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With the introduction of proper S1G channel flags, this function is no
longer used. Remove it.
Signed-off-by: Lachlan Hodges <lachlan.hodges@morsemicro.com>
Link: https://patch.msgid.link/20250918051913.500781-4-lachlan.hodges@morsemicro.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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