Re: [PATCH 08/20] media: solo6x10: add _maybe_unused to currently unused functions

Ismael Luceno
2021-11-25T21:30:58Z

On 24/Nov/2021 20:13, Mauro Carvalho Chehab wrote:
> There are several unused helper macros there, meant to parse some
> fields.
>
> While there's not wrong with that, it generates clang warnings
> with W=1, causing build to break with CONFIG_WERROR.
>
> So, add __maybe_unused to fix such warnings.
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>
> To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover.
> See [PATCH 00/20] at: https://lore.kernel.org/all/cover.1637781097.git.mchehab+huawei@kernel.org/
>
> drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c b/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
> index 0abcad4e84fa..85eaf5d00e9b 100644
> --- a/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
> +++ b/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
> @@ -391,12 +391,12 @@ static int solo_send_desc(struct solo_enc_dev *solo_enc, int skip,
> }
>
> /* Extract values from VOP header - VE_STATUSxx */
> -static inline int vop_interlaced(const vop_header *vh)
> +static inline __maybe_unused int vop_interlaced(const vop_header *vh)
> {
> return (__le32_to_cpu((*vh)[0]) >> 30) & 1;
> }
>
> -static inline u8 vop_channel(const vop_header *vh)
> +static inline __maybe_unused u8 vop_channel(const vop_header *vh)
> {
> return (__le32_to_cpu((*vh)[0]) >> 24) & 0x1F;
> }
> @@ -411,12 +411,12 @@ static inline u32 vop_mpeg_size(const vop_header *vh)
> return __le32_to_cpu((*vh)[0]) & 0xFFFFF;
> }
>
> -static inline u8 vop_hsize(const vop_header *vh)
> +static inline u8 __maybe_unused vop_hsize(const vop_header *vh)
> {
> return (__le32_to_cpu((*vh)[1]) >> 8) & 0xFF;
> }
>
> -static inline u8 vop_vsize(const vop_header *vh)
> +static inline u8 __maybe_unused vop_vsize(const vop_header *vh)
> {
> return __le32_to_cpu((*vh)[1]) & 0xFF;
> }
> @@ -436,12 +436,12 @@ static inline u32 vop_jpeg_size(const vop_header *vh)
> return __le32_to_cpu((*vh)[4]) & 0xFFFFF;
> }
>
> -static inline u32 vop_sec(const vop_header *vh)
> +static inline u32 __maybe_unused vop_sec(const vop_header *vh)
> {
> return __le32_to_cpu((*vh)[5]);
> }
>
> -static inline u32 vop_usec(const vop_header *vh)
> +static inline __maybe_unused u32 vop_usec(const vop_header *vh)
> {
> return __le32_to_cpu((*vh)[6]);
> }
> --
> 2.33.1
>

Acked-by: Ismael Luceno <ismael@iodev.co.uk>