On 22/09/16 10:42, Arnd Bergmann wrote:
> The -Wempty-body gcc warning triggers in the newly added zpa2326 driver:
>
> drivers/iio/pressure/zpa2326.c: In function 'zpa2326_dequeue_pressure':
> drivers/iio/pressure/zpa2326.c:578:3: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
>
> The use of an empty statement behind 'if (...)' is harmless here, but
> it shows that the dev_dbg() macro is not used correctly: when the "DEBUG"
> macro is not set, dev_dbg() already defaults to a no-operation, though
> one that lets the compiler know that the arguments are used, and lets
> it check the format string.
>
> Fixing this also simplifies the driver.
>
> Fixes: 03b262f2bbf4 ("iio:pressure: initial zpa2326 barometer support")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Fixed up patch title with an extra i and applied to the togreg branch of iio.git
initially pushed out as testing for the autobuilders to play with it.
Thanks,
Jonathan
> ---
> drivers/iio/pressure/zpa2326.c | 4 ----
> 1 file changed, 4 deletions(-)
>
> diff --git a/drivers/iio/pressure/zpa2326.c b/drivers/iio/pressure/zpa2326.c
> index 19d2eb46fda6..c720c3ac0b9b 100644
> --- a/drivers/iio/pressure/zpa2326.c
> +++ b/drivers/iio/pressure/zpa2326.c
> @@ -147,12 +147,8 @@ struct zpa2326_private {
> #define zpa2326_warn(_idev, _format, _arg...) \
> dev_warn(_idev->dev.parent, _format, ##_arg)
>
> -#ifdef DEBUG
> #define zpa2326_dbg(_idev, _format, _arg...) \
> dev_dbg(_idev->dev.parent, _format, ##_arg)
> -#else
> -#define zpa2326_dbg(_idev, _format, _arg...)
> -#endif
>
> bool zpa2326_isreg_writeable(struct device *dev, unsigned int reg)
> {
>
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