Re: [PATCH 00/12] IIO: clang W=1 warning cleanup.

[Nathan Chancellor <nathan@kernel.org>]

On Sun, Nov 28, 2021 at 05:24:33PM +0000, Jonathan Cameron wrote:
> From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> 
> Hi All,
> 
> In the interests of noise reduction in warnings during build tests of
> new code, this series suppresses a bunch of warnings seen with
> LLVM=1 W=1.
> 
> Note I am seeing two others I haven't fixed here.  One is tied up in
> the existing CONFIG_PM* cleanup patch set and will be dealt with as
> part of that.  The other in tsl2772 looks like it might be a bug that
> needs further analysis. If anyone is curious:
> 
> drivers/iio/light/tsl2772.c:576:24: warning: variable 'prox_diode_mask' set but not used [-Wunused-but-set-variable]
>         int i, ret, num_leds, prox_diode_mask;     
> 
> As is common with series like this, some of the drivers are old
> and as such I haven't cc'd original authors etc and would appreciate
> a sanity check from anyone who has the time.
> 
> Mauro and Arnd are cc'd on a bunch of them because a media patch that
> I happened to see had similar fixes + discussion of type to use in the
> casting. For some others I've just picked on people who touched
> the driver in last year or so.
> 
> Nothing in this series should have any functional affect.
> 
> Jonathan

I build tested drivers/iio/ for arm, arm64, s390, and x86_64
allmodconfig and did not see any warnings other than the ones mentioned
in the commit message.

All the fixes look reasonable for the warnings.

Reviewed-by: Nathan Chancellor <nathan@kernel.org>

> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Cc: Stephan Gerhold <stephan@gerhold.net>
> Cc: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com>
> Cc: Baptiste Mansuy <bmansuy@invensense.com>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Jonathan Albrieux <jonathan.albrieux@gmail.com>
> 
> Jonathan Cameron (12):
>   iio:accel:bma180: Suppress clang W=1 warning about pointer to enum
>     conversion.
>   iio:dc:ina2xx-adc: Suppress clang W=1 warning about pointer to enum
>     conversion.
>   iio:adc:rcar: Suppress clang W=1 warning about pointer to enum
>     conversion.
>   iio:adc:ti-ads1015: Suppress clang W=1 warning about pointer to enum
>     conversion.
>   iio:amplifiers:hmc425a: Suppress clang W=1 warning about pointer to
>     enum conversion.
>   iio:dac:mcp4725: Suppress clang W=1 warning about pointer to enum
>     conversion.
>   iio:imu:inv_icm42600: Suppress clang W=1 warning about pointer to enum
>     conversion.
>   iio:imu:inv_mpu6050: Suppress clang W=1 warning about pointer to enum
>     conversion.
>   iio:magn:ak8975: Suppress clang W=1 warning about pointer to enum
>     conversion.
>   iio:dummy: Drop set but unused variable len.
>   iio:accel:bmc150: Mark structure __maybe_unused as only needed with
>     for pm ops.
>   iio:accel:kxcjk-1013: Mark struct __maybe_unused to avoid warning.
> 
>  drivers/iio/accel/bma180.c                      | 2 +-
>  drivers/iio/accel/bmc150-accel-core.c           | 2 +-
>  drivers/iio/accel/kxcjk-1013.c                  | 2 +-
>  drivers/iio/adc/ina2xx-adc.c                    | 2 +-
>  drivers/iio/adc/rcar-gyroadc.c                  | 3 +--
>  drivers/iio/adc/ti-ads1015.c                    | 2 +-
>  drivers/iio/amplifiers/hmc425a.c                | 2 +-
>  drivers/iio/dac/mcp4725.c                       | 2 +-
>  drivers/iio/dummy/iio_simple_dummy_buffer.c     | 2 --
>  drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c | 2 +-
>  drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c | 2 +-
>  drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c       | 2 +-
>  drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c       | 2 +-
>  drivers/iio/magnetometer/ak8975.c               | 2 +-
>  14 files changed, 13 insertions(+), 16 deletions(-)
> 
> -- 
> 2.34.1
> 
>