Re: [PATCH v2 3/9] soc: samsung: Add Exynos Adaptive Supply Voltage driver

[Krzysztof Kozlowski]

On Thu, 8 Aug 2019 at 14:07, Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> wrote:
> >> +static unsigned int exynos5422_asv_parse_table(struct exynos_asv *asv,
> >> +                                     unsigned int pkg_id)
> >> +{
> >> +       return (pkg_id >> EXYNOS5422_TABLE_OFFSET) & EXYNOS5422_TABLE_MASK;
> >> +}
> >> +
> >> +static bool exynos5422_asv_parse_bin2(struct exynos_asv *asv,
> >> +                                    unsigned int pkg_id)
> >> +{
> >> +       return (pkg_id >> EXYNOS5422_BIN2_OFFSET) & EXYNOS5422_BIN2_MASK;
> >
> > return !!() for converting to boolean.
>
> I'm not convinced it is needed, the return type of the function is bool
> and value of the expression will be implicitly converted to that type.
> Is there any compiler warning related to that?

Yeah, but bool is int so there will be no implicit conversion... I
guess it is a convention. In theory !! is the proper conversion to
bool but if bool==int then it's essentially conversion to 1. I am not
sure what's the benefit, maybe for some wrong code which would do
comparisons on result like if (exynos5422_asv_parse_bin2() == TRUE)...

Best regards,
Krzysztof