Merge series "ASoC: Clean-up W=1 build warnings​ - part1" from Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>:

Both Lee Jones and I submitted separate series, this is the first part
of the merged result, which includes all previously reviewed patches
or suggested changes along with trivial ones for CONFIG_ACPI.

Lee Jones (2):
  ASoC: codecs: jz4770: Remove defined but never used variable
    'mic_boost_tlv'
  ASoC: ti: omap-mcbsp-st: Remove set, but unused variable 'w'

Pierre-Louis Bossart (11):
  ASoC: atmel: fix kernel-doc
  ASoC: samsung: spdif: fix kernel-doc
  ASoC: samsung: pcm: fix kernel-doc
  ASoC: tegra: tegra20_das: remove always-true comparison
  ASoC: uniphier: aio-core: fix kernel-doc
  ASoC: codecs: da7210: fix kernel-doc
  ASoC: codecs: da7219: fix 'defined but not used' warning
  ASoC: codecs: cros_ec_codec: fix 'defined but not used' warning
  ASoC: codecs: es8316: fix 'defined but not used' warning
  ASoC: codecs: max98390: fix 'defined but not used' warning
  ASoC: codecs: rt*: fix 'defined but not used' warning

 sound/soc/atmel/atmel-pcm-dma.c  |  2 +-
 sound/soc/atmel/atmel_ssc_dai.c  |  1 +
 sound/soc/codecs/cros_ec_codec.c |  2 ++
 sound/soc/codecs/da7210.c        | 12 +++++++-----
 sound/soc/codecs/da7219.c        |  2 ++
 sound/soc/codecs/es8316.c        |  2 ++
 sound/soc/codecs/jz4770.c        |  1 -
 sound/soc/codecs/max98390.c      |  8 --------
 sound/soc/codecs/rt274.c         |  2 ++
 sound/soc/codecs/rt286.c         |  2 ++
 sound/soc/codecs/rt298.c         |  2 ++
 sound/soc/codecs/rt5660.c        |  2 ++
 sound/soc/codecs/rt5677-spi.c    |  2 ++
 sound/soc/samsung/pcm.c          |  5 +++++
 sound/soc/samsung/spdif.c        |  6 +++---
 sound/soc/tegra/tegra20_das.c    |  3 +--
 sound/soc/ti/omap-mcbsp-st.c     |  3 ---
 sound/soc/uniphier/aio-core.c    |  7 +++----
 18 files changed, 37 insertions(+), 27 deletions(-)

--
2.25.1

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1].

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-throughSigned-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20200709010359.GA18971@embeddedorSigned-off-by: Mark Brown <broonie@kernel.org>

Add the TX offset slot programming.  There is no RX offset slot
register.

Since there is no RX offset the check for slot symmetry can be removed.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200709185129.10505-2-dmurphy@ti.comSigned-off-by: Mark Brown <broonie@kernel.org>

Add the ALSA controls to enable the ASI for channels 5-8
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200709185129.10505-1-dmurphy@ti.comSigned-off-by: Mark Brown <broonie@kernel.org>

The CPU and the codec both are represented now as components, so for
PDMIC we are registering two componenets with the same name. Since
there is no actual codec, we will merge the codec component into the
CPU one and use a dummy codec instead, for the DAI link.
As a bonus, debugfs will no longer report an error when will try to
create entries for both componenets with the same name.
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20200708163359.2698696-1-codrin.ciubotariu@microchip.comSigned-off-by: Mark Brown <broonie@kernel.org>

The CPU and the codec both are represented now as components, so for
CLASS-D we are registering two componenets with the same name. Since
there is no actual codec, we will merge the codec component into the
CPU one and use a dummy codec instead, for the DAI link.
As a bonus, debugfs will no longer report an error when will try to
create entries for both componenets with the same name.
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20200708101249.2626560-1-codrin.ciubotariu@microchip.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix W=1 warning when ACPI is not defined
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200707190612.97799-14-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix W=1 warning and removed unused table. In this case this a
duplicate of

static const struct of_device_id max98390_of_match[] = {
	{ .compatible = "maxim,max98390", },
	{}
};
MODULE_DEVICE_TABLE(of, max98390_of_match);

already used in the rest of the code.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200707190612.97799-13-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix W=1 warning

sound/soc/codecs/es8316.c:842:36: warning: 'es8316_acpi_match' defined
but not used [-Wunused-const-variable=]
  842 | static const struct acpi_device_id es8316_acpi_match[] = {
      |                                    ^~~~~~~~~~~~~~~~~
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200707190612.97799-12-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

fix W=1 warning

sound/soc/codecs/cros_ec_codec.c:1056:36: warning:
'cros_ec_codec_acpi_id' defined but not used
[-Wunused-const-variable=]
 1056 | static const struct acpi_device_id cros_ec_codec_acpi_id[] = {
      |                                    ^~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200707190612.97799-11-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Looks like 'w' has remained unchecked since the driver's inception.

Fixes the following W=1 kernel build warning(s):

 sound/soc/ti/omap-mcbsp-st.c: In function ‘omap_mcbsp_st_chgain’:
 sound/soc/ti/omap-mcbsp-st.c:145:6: warning: variable ‘w’ set but not used [-Wunused-but-set-variable]

Peter suggested that the whole read can be removed, so that's
been done too.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Jarkko Nikula <jarkko.nikula@bitmer.com>
Cc: Samuel Ortiz <samuel.ortiz@nokia.com>
Cc: linux-omap@vger.kernel.org
Link: https://lore.kernel.org/r/20200707190612.97799-10-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fixes the following W=1 kernel build warning(s):

 In file included from include/sound/tlv.h:10,
 from sound/soc/codecs/jz4770.c:19:
 sound/soc/codecs/jz4770.c:306:35: warning: ‘mic_boost_tlv’ defined but not used [-Wunused-const-variable=]
 306 | static const DECLARE_TLV_DB_SCALE(mic_boost_tlv, 0, 400, 0);
 | ^~~~~~~~~~~~~
 include/uapi/sound/tlv.h:64:15: note: in definition of macro ‘SNDRV_CTL_TLVD_DECLARE_DB_SCALE’
 64 | unsigned int name[] = { | ^~~~
 sound/soc/codecs/jz4770.c:306:14: note: in expansion of macro ‘DECLARE_TLV_DB_SCALE’
 306 | static const DECLARE_TLV_DB_SCALE(mic_boost_tlv, 0, 400, 0);
 | ^~~~~~~~~~~~~~~~~~~~
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Cc: ter Huurne <maarten@treewalker.org>
Link: https://lore.kernel.org/r/20200707190612.97799-9-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

fix W=1 warning

sound/soc/codecs/da7219.c:1711:36: warning: 'da7219_acpi_match'
defined but not used [-Wunused-const-variable=]
 1711 | static const struct acpi_device_id da7219_acpi_match[] = {
      |                                    ^~~~~~~~~~~~~~~~~
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/20200707190612.97799-8-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix W=1 warning, the kernel-doc syntax was probably from Doxygen?
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/20200707190612.97799-7-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix W=1 warning - wrong parameter description and bad format
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Link: https://lore.kernel.org/r/20200707190612.97799-6-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix W=1 warning:

sound/soc//tegra/tegra20_das.c:101:11: warning:
comparison of unsigned expression >= 0 is always true [-Wtype-limits]
  101 |  if ((reg >= TEGRA20_DAS_DAP_CTRL_SEL) &&
      |           ^~
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20200707190612.97799-5-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix W=1 warnings - missing fields in structure

Credits to Sylwester Nawrocki for the pclk and cclk descriptions.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Link: https://lore.kernel.org/r/20200707190612.97799-4-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix W=1 warnings - typos with structure fields
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Link: https://lore.kernel.org/r/20200707190612.97799-3-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix W=1 warning

Kernel-doc is not used in one file and missing argument in the second.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20200707190612.97799-2-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Merge series "ASoC: mediatek: mt8183: support machine driver for rt1015" from Tzung-Bi Shih <tzungbi@google.com>:

This series tries to reuse mt8183-mt6358-ts3a227-max98357.c for supporting
machine driver with rt1015 speaker amplifier.

The 1st patch is straightforward: re-order the header inclusions.

The 2nd patch adds document for the new proposed compatible string.

The 3rd patch changes the machine driver to support either "MAX98357A" or
"RT1015" codecs.

Tzung-Bi Shih (3):
  ASoC: mediatek: mt8183: sort header inclusions in alphabetical
  dt-bindings: mt8183: add compatible string for using rt1015
  ASoC: mediatek: mt8183: support machine driver with rt1015

 .../sound/mt8183-mt6358-ts3a227-max98357.txt  |   5 +-
 sound/soc/mediatek/Kconfig                    |   5 +-
 .../mt8183/mt8183-mt6358-ts3a227-max98357.c   | 171 +++++++++++++++---
 3 files changed, 153 insertions(+), 28 deletions(-)

--
2.27.0.383.g050319c2ae-goog

Merge series "ASoC: topology: fix error handling flow" from Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>:

While experimenting and introducing errors in Baytrail topology files
until I got them right, I encountered multiple kernel oopses and
memory leaks. This is a first batch to harden the code, but we should
probably think of a tool to fuzz the topology...

Pierre-Louis Bossart (5):
  ASoC: topology: fix kernel oops on route addition error
  ASoC: topology: fix tlvs in error handling for widget_dmixer
  ASoC: topology: use break on errors, not continue
  ASoC: topology: factor kfree(se) in error handling
  ASoC: topology: add more logs when topology load fails.

 sound/soc/soc-topology.c | 97 ++++++++++++++++++++++++----------------
 1 file changed, 58 insertions(+), 39 deletions(-)

base-commit: a5911ac5
--
2.25.1

Merge series "ASoC: qdsp6: add gapless compressed audio support" from Srinivas Kandagatla <srinivas.kandagatla@linaro.org>:

This patchset adds gapless compressed audio support on q6asm.
Gapless on q6asm is implemented using 2 streams in a single asm session.

First few patches are enhacements done to q6asm interface to allow
stream id per each command, gapless flags and silence meta data.
Along with this there are few trivial changes which I thought are necessary!
Last patch implements copy callback to allow finer control over buffer offsets,
specially in partial drain cases.

This patchset is tested on RB3 aka DB845c platform.

Thanks,
srini

Srinivas Kandagatla (11):
  ASoC: q6asm: add command opcode to timeout error report
  ASoC: q6asm: rename misleading session id variable
  ASoC: q6asm: make commands specific to streams
  ASoC: q6asm: use flags directly from asm-dai
  ASoC: q6asm: add length to write command token
  ASoC: q6asm: add support to remove intial and trailing silence
  ASoC: q6asm: add support to gapless flag in asm open
  ASoC: q6asm-dai: add next track metadata support
  ASoC: qdsp6: use dev_err instead of pr_err
  ASoC: qdsp6-dai: add gapless support
  ASoC: q6asm-dai: add support to copy callback

 sound/soc/qcom/qdsp6/q6asm-dai.c | 397 +++++++++++++++++++++++--------
 sound/soc/qcom/qdsp6/q6asm.c     | 173 +++++++++-----
 sound/soc/qcom/qdsp6/q6asm.h     |  48 ++--
 3 files changed, 458 insertions(+), 160 deletions(-)

--
2.21.0

This patch will fix unused variables kernel warnings when
CONFIG_ACPI is disabled.
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/1594147044-25582-1-git-send-email-Vijendar.Mukunda@amd.comSigned-off-by: Mark Brown <broonie@kernel.org>

Machines with rt1015 should use the compatible string
"mt8183-mt6358-ts3a227-rt1015".
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200708113233.3994206-3-tzungbi@google.comSigned-off-by: Mark Brown <broonie@kernel.org>

Supports machine driver with rt1015 ("mt8183-mt6358-ts3a227-rt1015").
Embeds in existing mt8183-mt6358-ts3a227-max98357.c because they share
most of the code.
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200708113233.3994206-4-tzungbi@google.comSigned-off-by: Mark Brown <broonie@kernel.org>

Sorts header inclusions in alphabetical.
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200708113233.3994206-2-tzungbi@google.comSigned-off-by: Mark Brown <broonie@kernel.org>

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200707163641.17113-10-srinivas.kandagatla@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

Make the error reporting more useful by adding opcode to it.
Without this its almost impossible to say which command actually
timed out.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200707163641.17113-2-srinivas.kandagatla@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

Add more dev_err() logs to help trace topology load failures, since we
have multiple error causes (e.g. invalid header or header that could
not be loaded).
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@linux.intel.com>
Link: https://lore.kernel.org/r/20200707203749.113883-6-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

No need to repeat the same thing multiple times when it can be done in
one location.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200707203749.113883-5-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Since the beginning of the topology, the code continues to the next
object even when an error is detected.

The topology should be handled with an all-or-nothing design, loading
a partially valid topology is a sure way to get bug reports that are
difficult to deal with.

Changing the behavior may break previous solutions and expose problems
in topology files delivered in the past, so it's probably not wise to
add this patch to stable branches without revalidation.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200707203749.113883-4-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

we need to free all allocated tlvs, not just the one allocated in
the loop before releasing kcontrols - other the tlvs references will
leak.

Fixes: 9f90af3a ('ASoC: topology: Consolidate and fix asoc_tplg_dapm_widget_*_create flow')
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200707203749.113883-3-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

When errors happens while loading graph components, the kernel oopses
while trying to remove all topology components. This can be
root-caused to a list pointing to memory that was already freed on
error.

remove_route() is already called on errors and will perform the
required cleanups so there's no need to free the route memory in
soc_tplg_dapm_graph_elems_load() if the route was added to the
list. We do however want to free the routes allocated but not added to
the list.

Fixes: 7df04ea7 ('ASoC: topology: modify dapm route loading routine and add dapm route unloading')
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200707203749.113883-2-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

After finishing using device node got from of_find_compatible_node(),
of_node_put() needs to be called.
Signed-off-by: Liao Pingfang <liao.pingfang@zte.com.cn>
Link: https://lore.kernel.org/r/1594122467-11615-1-git-send-email-wang.yi59@zte.com.cnSigned-off-by: Mark Brown <broonie@kernel.org>

Merge series "ASoC: amd: remove warnings with make W=1" from Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>:

Yet another cleanup series, with good findings of variables not used
for anything.

Pierre-Louis Bossart (6):
  ASoC: amd: acp-da7219-max98357a: fix 'defined but not used' warning
  ASoC: amd: acp-rt5645: fix 'defined but not used' warning
  ASoC: amd: raven: acp3x-pcm-dma: fix 'set but not used' warning
  ASoC: amd: raven: acp3x-i2s: fix 'set but not used' warning
  ASoC: amd: raven: acp3x-pcm-dma: remove unused-but-set variable
  ASoC: amd: raven: acp3x-i2s: remove unused-but-set variable

 sound/soc/amd/acp-da7219-max98357a.c | 2 ++
 sound/soc/amd/acp-rt5645.c           | 2 ++
 sound/soc/amd/raven/acp3x-i2s.c      | 4 ----
 sound/soc/amd/raven/acp3x-pcm-dma.c  | 4 ----
 4 files changed, 4 insertions(+), 8 deletions(-)

--
2.25.1

This adds default clock/PLL configuration to the driver
for usage with generic drivers like simple-card for usage
with a fixed rate clock.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/20200626164623.87894-1-sebastian.reichel@collabora.comSigned-off-by: Mark Brown <broonie@kernel.org>

Add ACPI dependency for evaluating DMIC hardware
runtime.
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/1594118813-18689-1-git-send-email-Vijendar.Mukunda@amd.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix W=1 warning. The variable prtd is set but not used.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200702164433.162815-7-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix W=1 warning. The variable prtd is not used, remove.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200702164433.162815-6-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

Fix W=1 warning. the card variable is useless here
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200702164433.162815-5-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>