Re: [Xen-devel] [PATCH v5 02/30] bitops: add BIT_ULL variant

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Thu, 6 Apr 2017, Andre Przywara wrote:
> To safely handle 64-bit registers even on 32-bit systems, introduce
> a BIT_ULL variant (lifted from Linux).
> 
> Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>

Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>

> ---
>  xen/include/asm-arm/bitops.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/xen/include/asm-arm/bitops.h b/xen/include/asm-arm/bitops.h
> index bda8898..1cbfb9e 100644
> --- a/xen/include/asm-arm/bitops.h
> +++ b/xen/include/asm-arm/bitops.h
> @@ -24,6 +24,7 @@
>  #define BIT(nr)                 (1UL << (nr))
>  #define BIT_MASK(nr)            (1UL << ((nr) % BITS_PER_WORD))
>  #define BIT_WORD(nr)            ((nr) / BITS_PER_WORD)
> +#define BIT_ULL(nr)             (1ULL << (nr))
>  #define BITS_PER_BYTE           8
>  
>  #define ADDR (*(volatile int *) addr)
> -- 
> 2.8.2
> 

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