[PATCH v4 0/9] iio: enable context analysis for all drivers

[Rupesh Majhi]

Jonathan asked for the qcom-spmi-adc5-gen3 fix to become the first
patch of a series that enables context analysis across IIO [1]. This
is that series.

With CONTEXT_ANALYSIS := y in every drivers/iio Makefile, testing gives
256 warnings and 2 errors in 126 files (x86_64 allmodconfig, clang
23.1).

Patch 1 fixes the two qcom errors, as v3 did, but names the lock the
way Bart suggested [2]. Patch 2 annotates the two conditional mode
claims in iio.h, which accounts for 241 of the warnings, in 120 files.
Patch 3 covers the core helpers behind them. Patches 4 to 8 annotate
lock helpers in kx022a, meson_saradc, the DMA buffer, opt3001 and
veml6031x00. None of them is a locking bug. Patch 9 enables the
analysis. The common and sensorhubs Makefiles only list subdirectories
and are left alone.

With the series applied all 726 files build without warnings, also
with W=1. bma180, ab8500-gpadc and intel_dc_ti_adc are not in
allmodconfig and were built on their own. gcc W=1 builds show no
warnings. Removing an unlock or a release is still reported, tried in
kx022a, ms5611 and veml6031x00.

Bart's thread-safety branch [3] has most of the same annotations. For
meson_saradc and the DMA buffer he uses __context_unsafe(). Here they
name the lock, so the helpers are checked, and for meson_saradc the
callers too.

Written with help from an LLM coding assistant.

v4: was a single qcom patch, now the first of nine
v3: https://lore.kernel.org/linux-iio/20261025191510.22261-1-zoone.rupert@xxxxxxxxx/

[1] https://lore.kernel.org/linux-iio/20261025215954.73549810@jic23-hlaptop/
[2] https://lore.kernel.org/linux-iio/76bbebb4-7337-486d-8f21-a39bcb6dca93@xxxxxxx/
[3] https://github.com/bvanassche/linux/tree/thread-safety

Cc: Marco Elver <elver@xxxxxxxxxx>
Cc: Bart Van Assche <bvanassche@xxxxxxx>

Rupesh Majhi (9):
  iio: adc: qcom-spmi-adc5-gen3: fix lock annotations on mutex helpers
  iio: core: annotate the conditional mode claims
  iio: core: mark the mode lock helpers __context_unsafe
  iio: accel: kionix-kx022a: annotate the lock helpers
  iio: adc: meson_saradc: annotate the lock helpers
  iio: buffer-dma: annotate the queue lock helpers
  iio: light: opt3001: mark the interrupt handler __context_unsafe
  iio: light: veml6031x00: annotate the event enable helpers
  iio: enable context analysis for all drivers

 drivers/iio/Makefile                         | 2 ++
 drivers/iio/accel/Makefile                   | 2 ++
 drivers/iio/accel/kionix-kx022a.c            | 2 ++
 drivers/iio/adc/Makefile                     | 2 ++
 drivers/iio/adc/meson_saradc.c               | 2 ++
 drivers/iio/adc/qcom-spmi-adc5-gen3.c        | 4 ++--
 drivers/iio/addac/Makefile                   | 2 ++
 drivers/iio/afe/Makefile                     | 2 ++
 drivers/iio/amplifiers/Makefile              | 2 ++
 drivers/iio/buffer/Makefile                  | 2 ++
 drivers/iio/buffer/industrialio-buffer-dma.c | 2 ++
 drivers/iio/cdc/Makefile                     | 2 ++
 drivers/iio/chemical/Makefile                | 2 ++
 drivers/iio/common/cros_ec_sensors/Makefile  | 2 ++
 drivers/iio/common/hid-sensors/Makefile      | 2 ++
 drivers/iio/common/inv_sensors/Makefile      | 2 ++
 drivers/iio/common/ms_sensors/Makefile       | 2 ++
 drivers/iio/common/scmi_sensors/Makefile     | 3 +++
 drivers/iio/common/ssp_sensors/Makefile      | 2 ++
 drivers/iio/common/st_sensors/Makefile       | 2 ++
 drivers/iio/dac/Makefile                     | 2 ++
 drivers/iio/dummy/Makefile                   | 2 ++
 drivers/iio/filter/Makefile                  | 2 ++
 drivers/iio/flow/Makefile                    | 2 ++
 drivers/iio/frequency/Makefile               | 2 ++
 drivers/iio/gyro/Makefile                    | 2 ++
 drivers/iio/health/Makefile                  | 2 ++
 drivers/iio/humidity/Makefile                | 2 ++
 drivers/iio/imu/Makefile                     | 2 ++
 drivers/iio/imu/bmi160/Makefile              | 3 +++
 drivers/iio/imu/bmi270/Makefile              | 3 +++
 drivers/iio/imu/bmi323/Makefile              | 3 +++
 drivers/iio/imu/bno055/Makefile              | 2 ++
 drivers/iio/imu/inv_icm42600/Makefile        | 2 ++
 drivers/iio/imu/inv_icm42607/Makefile        | 2 ++
 drivers/iio/imu/inv_icm45600/Makefile        | 2 ++
 drivers/iio/imu/inv_mpu6050/Makefile         | 2 ++
 drivers/iio/imu/smi330/Makefile              | 3 +++
 drivers/iio/imu/st_lsm6dsx/Makefile          | 3 +++
 drivers/iio/imu/st_lsm9ds0/Makefile          | 3 +++
 drivers/iio/industrialio-core.c              | 2 ++
 drivers/iio/light/Makefile                   | 2 ++
 drivers/iio/light/opt3001.c                  | 1 +
 drivers/iio/light/veml6031x00.c              | 2 ++
 drivers/iio/magnetometer/Makefile            | 2 ++
 drivers/iio/multiplexer/Makefile             | 2 ++
 drivers/iio/orientation/Makefile             | 2 ++
 drivers/iio/position/Makefile                | 2 ++
 drivers/iio/potentiometer/Makefile           | 2 ++
 drivers/iio/potentiostat/Makefile            | 2 ++
 drivers/iio/pressure/Makefile                | 2 +-
 drivers/iio/proximity/Makefile               | 2 ++
 drivers/iio/resolver/Makefile                | 2 ++
 drivers/iio/sensorhubs/osf/Makefile          | 2 ++
 drivers/iio/temperature/Makefile             | 2 ++
 drivers/iio/test/Makefile                    | 2 ++
 drivers/iio/trigger/Makefile                 | 2 ++
 include/linux/iio/iio.h                      | 9 ++-------
 58 files changed, 121 insertions(+), 10 deletions(-)


base-commit: 7d80b4b383bc53b48abd3a30ca4a91cdab568bfa
-- 
2.43.0