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[v5,02/30] bitops: add BIT_ULL variant

Message ID 1491434362-30310-3-git-send-email-andre.przywara@arm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Andre Przywara April 5, 2017, 11:18 p.m. UTC 
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@arm.com>
---
 xen/include/asm-arm/bitops.h | 1 +
 1 file changed, 1 insertion(+)

Comments

Stefano Stabellini April 5, 2017, 11:26 p.m. UTC | #1 
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@arm.com>

Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>

> ---
>  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
>
diff mbox

Patch

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)