Re: [PATCH] soc: fsl: qe: remove unused function

Daniel Axtens
2021-04-16T06:57:39Z

Hi Jiapeng,

> Fix the following clang warning:
>
> drivers/soc/fsl/qe/qe_ic.c:234:29: warning: unused function
> 'qe_ic_from_irq' [-Wunused-function].
>
> Reported-by: Abaci Robot <abaci@linux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
> ---
> drivers/soc/fsl/qe/qe_ic.c | 5 -----
> 1 file changed, 5 deletions(-)
>
> diff --git a/drivers/soc/fsl/qe/qe_ic.c b/drivers/soc/fsl/qe/qe_ic.c
> index 0390af9..b573712 100644
> --- a/drivers/soc/fsl/qe/qe_ic.c
> +++ b/drivers/soc/fsl/qe/qe_ic.c
> @@ -231,11 +231,6 @@ static inline void qe_ic_write(__be32 __iomem *base, unsigned int reg,
> qe_iowrite32be(value, base + (reg >> 2));
> }
>
> -static inline struct qe_ic *qe_ic_from_irq(unsigned int virq)
> -{
> - return irq_get_chip_data(virq);
> -}

This seems good to me.

* We know that this function can't be called directly from outside the
file, because it is static.

* The function address isn't used as a function pointer anywhere, so
that means it can't be called from outside the file that way (also
it's inline, which would make using a function pointer unwise!)

* There's no obvious macros in that file that might construct the name
of the function in a way that is hidden from grep.

All in all, I am fairly confident that the function is indeed not used.

Reviewed-by: Daniel Axtens <dja@axtens.net>

Kind regards,
Daniel

> -
> static inline struct qe_ic *qe_ic_from_irq_data(struct irq_data *d)
> {
> return irq_data_get_irq_chip_data(d);
> --
> 1.8.3.1