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WCN3990 and other similar WiFi/BT chips incorporate a simple on-chip PMU
(clearly described as such in the documentation). Provide DT schema
covering other Qualcomm WiFi/BT chips to cover these devices too.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Acked-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260106-wcn3990-pwrctl-v2-1-0386204328be@oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
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This patch adds a new sysfs node in /sys/fs/f2fs/<disk>/inject_lock_timeout,
it relies on CONFIG_F2FS_FAULT_INJECTION kernel config.
It can be used to simulate different type of timeout in lock duration.
========== ===============================
Flag_Value Flag_Description
========== ===============================
0x00000000 No timeout (default)
0x00000001 Simulate running time
0x00000002 Simulate IO type sleep time
0x00000003 Simulate Non-IO type sleep time
0x00000004 Simulate runnable time
========== ===============================
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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This patch introduce a new fault type FAULT_LOCK_TIMEOUT, it can
be used to inject timeout into lock duration.
Timeout type can be set via /sys/fs/f2fs/<disk>/inject_timeout_type
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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No logic changes.
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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This patch add a new sysfs node in /sys/fs/f2fs/<device>/max_lock_elapsed_time.
This is a threshold, once a thread enters critical region that lock covers,
total elapsed time exceeds this threshold, f2fs will print tracepoint to dump
information of related context. This sysfs entry can be used to control the
value of threshold, by default, the value is 500 ms.
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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On X86 AMD systems, mitigations=off also disables the Transient
Scheduler Attacks (TSA) mitigation. Add it to the list.
Signed-off-by: Yu Liao <liaoyu.ly@bytedance.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251225121438.38427-1-liaoyu.ly@bytedance.com>
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Fix a broken line break in the word "architecture" in the spufs
documentation.
Signed-off-by: Akiyoshi Kurita <weibu@redadmin.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251225161615.3107808-1-weibu@redadmin.org>
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'even codes' should be 'event codes' at the end of input.rst
Signed-off-by: Wu Canhong <canhong12@163.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251226160219.64818-1-canhong12@163.com>
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Remove the useless :c:func: annotations.
Suggested-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251222232506.2615-2-thorsten.blum@linux.dev>
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Convert internal cross-references in "Putting Your Stuff in the kernel"
section from inline code to internal links.
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251223035254.22894-4-bagasdotme@gmail.com>
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references
Do not italicize EXPORT_SYMBOL() and EXPORT_SYMBOL_GPL() references in
EXPORT_SYMBOL_NS() and EXPORT_SYMBOL_NS_GPL() subsections.
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251223035254.22894-3-bagasdotme@gmail.com>
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Remove unneeded :c:macro: annotation of current macro.
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251223035254.22894-2-bagasdotme@gmail.com>
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Remove /dev/cdwriter from the local symlinks table and from the related
note.
Creation of the symlink was removed from udev in commit [1] that
became a part of release 115 in 2007 [2].
The altered text was added in 1995 [3].
[1] https://git.kernel.org/pub/scm/linux/hotplug/udev.git/commit/?id=b1a2b83f2d
2007-08-11 14:06:03 +0200 Kay Sievers.
rules: update Fedora rules
[2] https://git.kernel.org/pub/scm/linux/hotplug/udev.git/commit/?h=7e599863919
2007-08-24 01:29:54 +0200 Kay Sievers.
release 115
[3] https://git.kernel.org/pub/scm/linux/kernel/git/history/history.git/diff/Documentation/devices.txt?h=v2.5.45&id=6e995ea941a
1995-11-21 Linus Torvalds.
Import 1.3.43
Signed-off-by: Max Nikulin <manikulin@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <f5c3f6e9-cd92-47e3-89c3-06dbcfc98c17@gmail.com>
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Signed-off-by: Akiyoshi Kurita <weibu@redadmin.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251223112946.2580519-1-weibu@redadmin.org>
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Extend the "depends on" syntax to support conditional dependencies
using "depends on X if Y". While functionally equivalent to "depends
on X || (Y == n)", "depends on X if Y" is much more readable and
makes the kconfig language uniform in supporting the "if <expr>"
suffix.
This also improves readability for "optional" dependencies, which
are the subset of conditional dependencies where X is Y.
Previously such optional dependencies had to be expressed as
the counterintuitive "depends on X || !X", now this can be
represented as "depends on X if X".
The change is implemented by converting the "X if Y" syntax into the
"X || (Y == n)" syntax during "depends on" token processing.
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
[Graham Roff: Rewrote commit message, updated patch, added tests]
Signed-off-by: Graham Roff <grahamr@qti.qualcomm.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://patch.msgid.link/20251215-kconfig_conditional_deps-v3-1-59519af0a5df@qti.qualcomm.com
[nathan: Minor adjustments to spacing]
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
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Add guidance for AI assistants and developers using AI tools for kernel
contributions, per the consensus reached at the 2025 Maintainers Summit.
Create Documentation/process/coding-assistants.rst with detailed guidance
on licensing, Signed-off-by requirements, and attribution format. The
README points AI tools to this documentation.
This will allow coding assistants to easily parse these instructions and
comply with guidelines set by the community.
Link: https://lwn.net/Articles/1049830/
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251223122110.2496946-1-sashal@kernel.org>
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The memory-barriers.txt Korean translation is quite outdated. The last
update on the translation was made on 2022-10-10, by commit ee5a86f451f7
("docs/memory-barriers.txt/kokr: Fix confusing name of 'data dependency
barrier'"). After the date, the original memory-barriers.txt got seven
more changes so far. The most recent one was made on 2025-11-05. But
none of those are applied to the translation.
Maybe I can work again on keeping it updated. But, given the
advancement of translation tools, I think it might not be worth keeping
it at all. Remove the outdated translation.
If it turns out to be worthy to keep the translation and someone willing
to keep it updated steps up, this could be reverted.
This change was inspired from the last kernel summit discussion [1].
[1] https://lpc.events/event/19/contributions/2259/
Cc: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: SeongJae Park <sj@kernel.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251225014027.15948-1-sj@kernel.org>
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For review of patches that revisioned multiple times, patch changelogs
are very useful. Adding actual links to the previous versions can
further help the review. Using such links, reviewers can double check
the changelog by themselves, and find previous discussions. Nowadays
having such links (e.g., lore.kernel.org archive links) is easy and
reliable. Suggest adding such links if available.
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251225015447.16387-1-sj@kernel.org>
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The documentation states that:
make W=n
can be used to verify the documentation format. This is true for .c
files but not for headers [1].
Modify the documentation to specify that headers files are not covered
by make W=n and that these need to be checked separately with
scripts/kernel-doc.
[1] commit 3a025e1d1c2e ("Add optional check for bad kernel-doc comments")
Link: https://git.kernel.org/torvalds/c/3a025e1d1c2e
Signed-off-by: Vincent Mailhol <mailhol@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251225-doc-format-check-v1-1-dff637a4d275@kernel.org>
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Fixed capitalization and punctuation in process documentation.
Signed-off-by: Volodymyr Kot <volodymyr.kot.ua@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251225133911.87512-1-volodymyr.kot.ua@gmail.com>
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While reading the git-format-patch manpages [1], I discovered the existence
of the "Toggle Line Wrap" extension for Thunderbird which I found rather
convenient.
Looking at the history, the ancestor of this extension was added to the
documentation in commit e0e34e977a7c ("Documentation/email-clients.txt:
update Thunderbird docs with wordwrap plugin") but then removed in commit
f9a0974d3f70 ("Documentation: update thunderbird email client settings").
Extend the paragraph on Thunderbird's mailnews.wraplength register to
mention the existence of the "Toggle Line Wrap" extension. The goal is not
to create a war on what is the best option so make it clear that this is
just an alternative.
[1] man git-format-patch -- §Thunderbird
Link: https://git-scm.com/docs/git-format-patch#_thunderbird
Signed-off-by: Vincent Mailhol <mailhol@kernel.org>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Acked-by: Sotir Danailov <sndanailov@gmail.com> # As past commit author
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251226-docs_thunderbird-toggle-line-wrap-v2-1-aebb8c60025d@kernel.org>
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When using `make help`, SPHINXDIR doesn't wrap around 80 characters,
causing text to overflow or wrap in incorrect ways,
which then makes the text difficult to read
Signed-off-by: Mustafa Elrasheid <mustafaelrasheid@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20251227125244.6407-1-mustafaelrasheid@gmail.com>
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Fix spelling errors in the Japanese translation:
- "Menu attibutes: default value" -> "Menu attributes: default value"
- "Documentaion/ABI/" -> "Documentation/ABI/"
No change in meaning intended.
Signed-off-by: Masaharu Noguchi <nogunix@gmail.com>
Acked-by: Akira Yokosawa <akiyks@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260103-b4-practice-docs-typo-v1-1-d68ad6a22ab5@gmail.com>
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The current Japanese translation incorrectly implies that the kernel is
independent of the C language.
Translate "freestanding C environment" accurately.
Signed-off-by: Masaharu Noguchi <nogunix@gmail.com>
Reviewed-by: Akira Yokosawa <akiyks@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260104-ja-howto-v2-2-8cac525b3dfe@gmail.com>
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Fix obvious typos and duplicated phrases in the Japanese translation.
No change in meaning intended.
Acked-by: Akira Yokosawa <akiyks@gmail.com>
Signed-off-by: Masaharu Noguchi <nogunix@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260104-ja-howto-v2-1-8cac525b3dfe@gmail.com>
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Merge series from Zhang Yi <zhangyi@everest-semi.com>:
To improve the codec's performance, add members related to power and version,
and modify the configuration.
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"Radxa CM5" is the correct name[1], so fix the description. While at
it, move the CM5 entry after the CM3I.
[1] https://dl.radxa.com/cm5/radxa_cm5_product_brief.pdf
Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20251229045838.2917-2-naoki@radxa.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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"Radxa CM3I" is the correct name[1], so fix the description.
[1] https://dl.radxa.com/cm3i/docs/hw/radxa_cm3i_product_brief.pdf
Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20251229045838.2917-1-naoki@radxa.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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Merge series from Johan Hovold <johan@kernel.org>:
The soundwire update_status() callback may be called multiple times with
the same ATTACHED status but initialisation should only be done when
transitioning from UNATTACHED to ATTACHED.
This series fixes the Qualcomm wsa88xx codec drivers that do unnecessary
reinitialisation or potentially fail to initialise at all.
Included is also a related clean up suppressing a related codec variant
printk.
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Merge series from Alain Volmat <alain.volmat@foss.st.com>:
Update ST related SPI drivers in order to remove the __maybe_unused
statements on pm related functions thanks to the usage of pm_ptr.
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Direct URLs to vendor specifications for Intel VT-d and AMD IOMMU
are frequently changed by vendors, leading to broken links in the
documentation.
Replace the fragile URLs with persistent identifiers, providing the
official document titles and IDs. This ensures users can locate the
relevant specifications regardless of vendor website restructuring.
Signed-off-by: Richard Lyu <richard.lyu@suse.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://patch.msgid.link/20260106052815.46114-1-richard.lyu@suse.com
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Add new compatible string for SpacemiT K3 SoC's GPIO controller.
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Yixun Lan <dlan@gentoo.org>
Link: https://lore.kernel.org/r/20260106-02-k3-gpio-v3-1-4800c214810b@gentoo.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
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The Everest ES8316 has interrupt capability on its GPIO3 pin for
headphone detection. Several of the RockPi 4 variants are using it
already.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260105193203.3166320-1-robh@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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The "select" schema is not necessary because "syscon" compatible is already
excluded from the default select logic.
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260105212858.3454174-1-robh@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
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The Mali C55 driver uses the v4l2-isp framework, which defines its own
versioning numbers.
Do not use the Mali C55 specific version identifier in the code example
in the documentation of the Mali C55 stats and params metadata formats.
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
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Document DSI controller and phy on QCS8300 platform.
Signed-off-by: Ayushi Makhija <quic_amakhija@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/696787/
Link: https://lore.kernel.org/r/20260104134442.732876-4-quic_amakhija@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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QCS8300 MDSS DSI controller reuses the same IP as SA8775P, with
identical register layout and programming model. Introduce a
QCS8300-specific compatible with a fallback to
`qcom,sa8775p-dsi-ctrl` to reflect this hardware reuse.
Signed-off-by: Ayushi Makhija <quic_amakhija@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/696784/
Link: https://lore.kernel.org/r/20260104134442.732876-3-quic_amakhija@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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QCS8300 uses the same 5nm MDSS DSI PHY IP as SA8775P, sharing
an identical register layout and programming model. Introduce a
QCS8300-specific compatible with a fallback to `qcom,sa8775p-dsi-phy-5nm`
to reflect this hardware reuse.
Signed-off-by: Ayushi Makhija <quic_amakhija@quicinc.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/696783/
Link: https://lore.kernel.org/r/20260104134442.732876-2-quic_amakhija@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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The phrasing of the page-pool-get doc is very confusing.
It's supposed to highlight that support depends on the driver
doing its part but it sounds like orphaned page pools won't
be visible.
The description of the ifindex is completely wrong.
We move the page pool to loopback and skip the attribute if
ifindex is loopback.
Link: https://lore.kernel.org/20260104084347.5de3a537@kernel.org
Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Link: https://patch.msgid.link/20260104165232.710460-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Document the Milos-based The Fairphone (Gen. 6) smartphone.
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://lore.kernel.org/r/20251210-sm7635-fp6-initial-v4-4-b05fddd8b45c@fairphone.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
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Document the Power Domain Controller on the Milos SoC.
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://lore.kernel.org/r/20251210-sm7635-fp6-initial-v4-3-b05fddd8b45c@fairphone.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
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Document Milos SoC compatible for the True Random Number Generator.
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://lore.kernel.org/r/20251210-sm7635-fp6-initial-v4-2-b05fddd8b45c@fairphone.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
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Add documentation for the uma/carveout_options and uma/carveout
attributes in sysfs
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Yo-Jung Leo Lin (AMD) <Leo.Lin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Setting bit i in the TPDA_FLUSH_CR register initiates a flush request
for port i, forcing the data to synchronize and be transmitted to the
sink device.
Signed-off-by: Tao Zhang <tao.zhang@oss.qualcomm.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Co-developed-by: Jie Gan <jie.gan@oss.qualcomm.com>
Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
[ Fix kernel version in Documentation ]
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20251223-add_sysfs_nodes_to_configure_tpda-v8-4-4c95db608b62@oss.qualcomm.com
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The TPDA_SYNC counter tracks the number of bytes transferred from the
aggregator. When this count reaches the value programmed in the
TPDA_SYNCR register, an ASYNC request is triggered, allowing userspace
tools to accurately parse each valid packet.
Signed-off-by: Tao Zhang <tao.zhang@oss.qualcomm.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Co-developed-by: Jie Gan <jie.gan@oss.qualcomm.com>
Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
[ Fix kernel version in Documentation ]
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20251223-add_sysfs_nodes_to_configure_tpda-v8-3-4c95db608b62@oss.qualcomm.com
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Setting the global_flush_req register to 1 initiates a flush request for
all enabled TPDA input ports. The register remains set until the flush
operation is complete.
Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
[ Fix kernel version in the Documentation ]
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20251223-add_sysfs_nodes_to_configure_tpda-v8-2-4c95db608b62@oss.qualcomm.com
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Introduce sysfs nodes to configure cross-trigger parameters for TPDA.
These registers define the characteristics of cross-trigger packets,
including generation frequency and flag values.
Signed-off-by: Tao Zhang <tao.zhang@oss.qualcomm.com>
Reviewed-by: James Clark <james.clark@linaro.org>
Co-developed-by: Jie Gan <jie.gan@oss.qualcomm.com>
Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
[ Fix kernel version in the Documentation ]
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20251223-add_sysfs_nodes_to_configure_tpda-v8-1-4c95db608b62@oss.qualcomm.com
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As discussed in [1], removing __cond_lock() will improve the readability
of trylock code. Now that Sparse context tracking support has been
removed, we can also remove __cond_lock().
Change existing APIs to either drop __cond_lock() completely, or make
use of the __cond_acquires() function attribute instead.
In particular, spinlock and rwlock implementations required switching
over to inline helpers rather than statement-expressions for their
trylock_* variants.
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/20250207082832.GU7145@noisy.programming.kicks-ass.net/ [1]
Link: https://patch.msgid.link/20251219154418.3592607-25-elver@google.com
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Remove Sparse support as discussed at [1].
The kernel codebase is still scattered with numerous places that try to
appease Sparse's context tracking ("annotation for sparse", "fake out
sparse", "work around sparse", etc.). Eventually, as more subsystems
enable Clang's context analysis, these places will show up and need
adjustment or removal of the workarounds altogether.
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/20250207083335.GW7145@noisy.programming.kicks-ass.net/ [1]
Link: https://lore.kernel.org/all/Z6XTKTo_LMj9KmbY@elver.google.com/ [2]
Link: https://patch.msgid.link/20251219154418.3592607-24-elver@google.com
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Add support for Clang's context analysis for ww_mutex.
The programming model for ww_mutex is subtly more complex than other
locking primitives when using ww_acquire_ctx. Encoding the respective
pre-conditions for ww_mutex lock/unlock based on ww_acquire_ctx state
using Clang's context analysis makes incorrect use of the API harder.
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20251219154418.3592607-21-elver@google.com
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