On Fri, 2021-10-22 at 08:47 +0200, Arnd Bergmann wrote:

From: Arnd Bergmann <arnd@arndb.de>

Without CONFIG_MLX5_EN_RXNFC, the function is unused, breaking the
build with CONFIG_WERROR:

mlx5/core/ipoib/ethtool.c:36:12: error: unused function
'mlx5i_flow_type_mask' [-Werror,-Wunused-function]
static u32 mlx5i_flow_type_mask(u32 flow_type)

We could add another #ifdef or mark this function inline, but
replacing the existing #ifdef with a __maybe_unused seems best
because that improves build coverage and avoids introducing
similar problems the next time this code changes.

Hi Arnd, thanks for your patch,
we have a pending patch that simply moves mlx5i_flow_type_mask() into
the #ifdef, where this function is only used

will submit it shortly.

Thanks again for your patch.