On Sun, 30 Jul 2023 18:44:06 -0700 Atul Raut <rauji.raut@xxxxxxxxx> wrote: Patch title should mention the device iio: accel: adxl367: ... > Replacing zero-length arrays with C99 flexible-array > members since they are obsolete. > Use the new DECLARE_FLEX_ARRAY() auxiliary macro instead > of defining a zero-length array. > > This fixes warnings such as: > ./drivers/iio/accel/adxl367_spi.c:38:6-17: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays) > > Signed-off-by: Atul Raut <rauji.raut@xxxxxxxxx> It isn't a variable length array so the heuristic that provided that warning is wrong. It could be switched to a u8 but then the code would be slightly harder to read as the functions it is being passed are typically used with arrays - this one just happens to only be one element long. Jonathan > --- > drivers/iio/accel/adxl367_spi.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/iio/accel/adxl367_spi.c b/drivers/iio/accel/adxl367_spi.c > index 118c894015a5..9dc61cb45fc5 100644 > --- a/drivers/iio/accel/adxl367_spi.c > +++ b/drivers/iio/accel/adxl367_spi.c > @@ -35,7 +35,7 @@ struct adxl367_spi_state { > */ > u8 reg_write_tx_buf[1] __aligned(IIO_DMA_MINALIGN); > u8 reg_read_tx_buf[2]; > - u8 fifo_tx_buf[1]; > + DECLARE_FLEX_ARRAY(u8, fifo_tx_buf); > }; > > static int adxl367_read_fifo(void *context, __be16 *fifo_buf,
