[U-Boot] [PATCH v4 1/4] bitops: introduce BIT() definition

Michael Heimpold mhei at heimpold.de
Fri Aug 21 21:26:41 CEST 2015


Hi,

Am Freitag, 21. August 2015, 19:01:56 schrieb Heiko Schocher:
> introduce BIT() definition, used in at91_udc gadget
> driver.
> 
> Signed-off-by: Heiko Schocher <hs at denx.de>
> 
> ---
> 
> Changes in v4: None
> Changes in v3:
> - new in v3
> 
> Changes in v2: None
> 
>  include/linux/bitops.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/include/linux/bitops.h b/include/linux/bitops.h
> index e724310..7d30ace 100644
> --- a/include/linux/bitops.h
> +++ b/include/linux/bitops.h
> @@ -3,6 +3,8 @@
>  
>  #include <asm/types.h>
>  
> +#define BIT(nr)		(1UL << (nr))
> +

JFYI, a few months ago, Wolfgang Denk NAKed a similar patch:
http://lists.denx.de/pipermail/u-boot/2014-February/173669.html

But I don't know whether this still stands.

>  /*
>   * ffs: find first bit set. This is defined the same way as
>   * the libc and compiler builtin ffs routines, therefore
> 

Best regards, 
Michael



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