tjh.dev
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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Pull i2c fix from Wolfram Sang:
"Two reverts merged into one commit to handle a regression caused by a
wrong cleanup because the underlying implications were unclear"
* tag 'i2c-for-6.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: muxes: pca954x: Fix broken reset-gpio usage
Pull Kbuild fixes from Nathan Chancellor:
- Strip trailing padding bytes from modules.builtin.modinfo to fix
error during modules_install with certain versions of kmod
- Drop unused static inline function warning in .c files with clang
from W=1 to W=2
- Ensure kernel-doc.py invocations use the PYTHON3 make variable to
ensure user's choice of Python interpreter is always respected
* tag 'kbuild-fixes-6.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux:
kbuild: Let kernel-doc.py use PYTHON3 override
compiler_types: Move unused static inline functions warning to W=2
kbuild: Strip trailing padding bytes from modules.builtin.modinfo
Revert commit 690de2902dca ("i2c: muxes: pca954x: Use reset controller
only") and its dependent commit 94c296776403 ("i2c: muxes: pca954x:
Reset if (de)select fails") because the first breaks all users of the
driver, by requiring a completely optional reset-gpio driver. These
commits cause that mux driver simply stops working when optional
reset-gpio is not included, but that reset-gpio is not pulled anyhow.
Driver cannot remove legacy reset-gpios handling.
Fixes: 690de2902dca ("i2c: muxes: pca954x: Use reset controller only")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Pull drm fix from Dave Airlie:
"Brown paper bag, the dma mask fix which I applied and actually looked
through for bad things, actually broke newer GPUs, there might be some
latent part in the boot path that is assuming 32-bit still, but we
will figure that out elsewhere.
nouveau:
- revert DMA mask change"
* tag 'drm-fixes-2025-11-09' of https://gitlab.freedesktop.org/drm/kernel:
Revert "drm/nouveau: set DMA mask before creating the flush page"
It is possible to force a specific version of python to be used when
building the kernel by passing PYTHON3= on the make command line.
However kernel-doc.py is currently called with python3 hard-coded and
thus ignores this setting.
Use $(PYTHON3) to run $(KERNELDOC) so that the desired version of
python is used.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Nicolas Schier <nsc@kernel.org>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://patch.msgid.link/20251107192933.2bfe9e57@endymion
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Pull RTC fixes from Alexandre Belloni:
"The two reverts are for patches that I shouldn't have applied. The
rx8025 patch fixes an issue present since 2022:
- cpcap, tps6586x: revert incorrect irq enable/disable balance fix
- rx8025: fix incorrect register reference"
* tag 'rtc-6.18-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
rtc: rx8025: fix incorrect register reference
Revert "rtc: cpcap: Fix initial enable_irq/disable_irq balance"
Revert "rtc: tps6586x: Fix initial enable_irq/disable_irq balance"
This reverts commit ebe755605082eddff80eafe0c50915b1366ee98f.
Tested the latest kernel on my GB203 and this seems to break it somehow.
Nov 09 04:16:14 bighp kernel: nouveau 0000:02:00.0: gsp: GSP-FMC boot failed (mbox: 0x0000000b)
Nov 09 04:16:14 bighp kernel: nouveau 0000:02:00.0: gsp: init failed, -5
Nov 09 04:16:14 bighp kernel: nouveau 0000:02:00.0: init failed with -5
Nov 09 04:16:14 bighp kernel: nouveau: drm:00000000:00000080: init failed with -5
Nov 09 04:16:14 bighp kernel: nouveau 0000:02:00.0: drm: Device allocation failed: -5
Nov 09 04:16:14 bighp kernel: nouveau 0000:02:00.0: probe with driver nouveau failed with error -5
Not sure why, I went over the patch and thought it should have worked, but there must be some
32-bit problem maybe in the FMC boot path.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Per Nathan, clang catches unused "static inline" functions in C files
since commit 6863f5643dd7 ("kbuild: allow Clang to find unused static
inline functions for W=1 build").
Linus said:
> So I entirely ignore W=1 issues, because I think so many of the extra
> warnings are bogus.
>
> But if this one in particular is causing more problems than most -
> some teams do seem to use W=1 as part of their test builds - it's fine
> to send me a patch that just moves bad warnings to W=2.
>
> And if anybody uses W=2 for their test builds, that's THEIR problem..
Here is the change to bump the warning from W=1 to W=2.
Fixes: 6863f5643dd7 ("kbuild: allow Clang to find unused static inline functions for W=1 build")
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20251106105000.2103276-1-andriy.shevchenko@linux.intel.com
[nathan: Adjust comment as well]
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Pull spi fix from Mark Brown:
"One new device ID for an Intel SoC"
* tag 'spi-fix-v6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: intel: Add support for Oak Stream SPI serial flash
Pull smb client fixes from Steve French:
- Fix change notify packet validation check
- Refcount fix (e.g. rename error paths)
- Fix potential UAF due to missing locks on directory lease refcount
* tag 'v6.18rc4-SMB-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
smb: client: validate change notify buffer before copy
smb: client: fix refcount leak in smb2_set_path_attr
smb: client: fix potential UAF in smb2_close_cached_fid()
This code is intended to operate on the CTRL1 register, but ctrl[1] is
actually CTRL2. Correctly, ctrl[0] is CTRL1.
Signed-off-by: Yuta Hayama <hayama@lineo.co.jp>
Fixes: 71af91565052 ("rtc: rx8025: fix 12/24 hour mode detection on RX-8035")
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/eae5f479-5d28-4a37-859d-d54794e7628c@lineo.co.jp
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Driver Changes:
- Fix missing synchronization on unbind (Balasubramani Vivekanandan)
- Fix device shutdown when doing FLR (Jouni Högander)
- Fix user fence signaling order (Matthew Brost)
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patch.msgid.link/mvfyflloncy76a7nmkatpj6f2afddavwsibz3y4u4wo6gznro5@rdulkuh5wvje
After commit d50f21091358 ("kbuild: align modinfo section for Secureboot
Authenticode EDK2 compat"), running modules_install with certain
versions of kmod (such as 29.1 in Ubuntu Jammy) in certain
configurations may fail with:
depmod: ERROR: kmod_builtin_iter_next: unexpected string without modname prefix
The additional padding bytes to ensure .modinfo is aligned within
vmlinux.unstripped are unexpected by kmod, as this section has always
just been null-terminated strings.
Strip the trailing padding bytes from modules.builtin.modinfo after it
has been extracted from vmlinux.unstripped to restore the format that
kmod expects while keeping .modinfo aligned within vmlinux.unstripped to
avoid regressing the Authenticode calculation fix for EDK2.
Cc: stable@vger.kernel.org
Fixes: d50f21091358 ("kbuild: align modinfo section for Secureboot Authenticode EDK2 compat")
Reported-by: Omar Sandoval <osandov@fb.com>
Reported-by: Samir M <samir@linux.ibm.com>
Reported-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Closes: https://lore.kernel.org/7fef7507-ad64-4e51-9bb8-c9fb6532e51e@linux.ibm.com/
Tested-by: Omar Sandoval <osandov@fb.com>
Tested-by: Samir M <samir@linux.ibm.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Reviewed-by: Nicolas Schier <nsc@kernel.org>
Link: https://patch.msgid.link/20251105-kbuild-fix-builtin-modinfo-for-kmod-v1-1-b419d8ad4606@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Pull regulator fix from Mark Brown:
"A simple fix for a missed part of an API conversion in the bd718x7
driver"
* tag 'regulator-fix-v6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: bd718x7: Fix voltages scaled by resistor divider
Add Oak Stream PCI ID to the driver list of supported devices.
This patch was originally written by Zeng Guang.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://patch.msgid.link/20251029065020.2920213-1-mika.westerberg@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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