Re: [PATCH 2/6] bitops: more BITS_TO_* macros

[Andy Shevchenko]

On Sat, Apr 27, 2019 at 08:29:32PM -0700, Yury Norov wrote:
> Introduce BITS_TO_U64, BITS_TO_U32 and BITS_TO_BYTES as they are handy
> in the following changes (BITS_TO_U32 specifically). Sync tools/
> version of the macros with the kernel implementation.

AFAICS you basically reimplement them for kernel use from tools/.

>  #define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)

Hmm... no TAB here? Perhaps another small fix can be done.

>  #define BITS_TO_LONGS(nr)	DIV_ROUND_UP(nr, BITS_PER_TYPE(long))
> +#define BITS_TO_U64(nr)		DIV_ROUND_UP(nr, BITS_PER_TYPE(u64))
> +#define BITS_TO_U32(nr)		DIV_ROUND_UP(nr, BITS_PER_TYPE(u32))
> +#define BITS_TO_BYTES(nr)	DIV_ROUND_UP(nr, BITS_PER_TYPE(char))
>  
>  extern unsigned int __sw_hweight8(unsigned int w);
>  extern unsigned int __sw_hweight16(unsigned int w);
> diff --git a/tools/include/linux/bitops.h b/tools/include/linux/bitops.h
> index 0b0ef3abc966..959dcb8214ba 100644
> --- a/tools/include/linux/bitops.h
> +++ b/tools/include/linux/bitops.h
> @@ -13,10 +13,11 @@
>  #include <linux/bits.h>
>  #include <linux/compiler.h>
>  
> -#define BITS_TO_LONGS(nr)	DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
> -#define BITS_TO_U64(nr)		DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u64))
> -#define BITS_TO_U32(nr)		DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u32))
> -#define BITS_TO_BYTES(nr)	DIV_ROUND_UP(nr, BITS_PER_BYTE)
> +#define BITS_PER_TYPE(type)	(sizeof(type) * BITS_PER_BYTE)
> +#define BITS_TO_LONGS(nr)	DIV_ROUND_UP(nr, BITS_PER_TYPE(long))
> +#define BITS_TO_U64(nr)		DIV_ROUND_UP(nr, BITS_PER_TYPE(u64))
> +#define BITS_TO_U32(nr)		DIV_ROUND_UP(nr, BITS_PER_TYPE(u32))
> +#define BITS_TO_BYTES(nr)	DIV_ROUND_UP(nr, BITS_PER_TYPE(char))

-- 
With Best Regards,
Andy Shevchenko