Hi. Arnd.
I send a patch by the below your request.
Would you plz confirm it ?
Thanks.
2011/8/25 Namjae Jeon <linkinjeon@xxxxxxxxx>:
> The compile warning is caused by __const_hweight8 when using hweight_long with -Wsign-compare option.
> The reason is that the default return value of this macro is signed. So need type casting to remove warning.
>
> Signed-off-by: Namjae Jeon <linkinjeon@xxxxxxxxx>
> ---
> include/asm-generic/bitops/const_hweight.h | 18 +++++++++---------
> 1 files changed, 9 insertions(+), 9 deletions(-)
>
> diff --git a/include/asm-generic/bitops/const_hweight.h b/include/asm-generic/bitops/const_hweight.h
> index fa2a50b..31b7fce 100644
> --- a/include/asm-generic/bitops/const_hweight.h
> +++ b/include/asm-generic/bitops/const_hweight.h
> @@ -4,15 +4,15 @@
> /*
> * Compile time versions of __arch_hweightN()
> */
> -#define __const_hweight8(w) \
> - ( (!!((w) & (1ULL << 0))) + \
> - (!!((w) & (1ULL << 1))) + \
> - (!!((w) & (1ULL << 2))) + \
> - (!!((w) & (1ULL << 3))) + \
> - (!!((w) & (1ULL << 4))) + \
> - (!!((w) & (1ULL << 5))) + \
> - (!!((w) & (1ULL << 6))) + \
> - (!!((w) & (1ULL << 7))) )
> +#define __const_hweight8(w) (unsigned long) \
> + ( (!!((w) & (1ULL << 0))) + \
> + (!!((w) & (1ULL << 1))) + \
> + (!!((w) & (1ULL << 2))) + \
> + (!!((w) & (1ULL << 3))) + \
> + (!!((w) & (1ULL << 4))) + \
> + (!!((w) & (1ULL << 5))) + \
> + (!!((w) & (1ULL << 6))) + \
> + (!!((w) & (1ULL << 7))) )
>
> #define __const_hweight16(w) (__const_hweight8(w) + __const_hweight8((w) >> 8 ))
> #define __const_hweight32(w) (__const_hweight16(w) + __const_hweight16((w) >> 16))
> --
> 1.7.4.4
>
>
Yes, this looks correct to me. Could you send the change as a proper patch
with your Signed-off-by:?
Arnd
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