linux-kernel - Re: [PATCH] bitops: move BITS() macro to the bitops file

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Date:	Wed, 7 Aug 2013 12:54:08 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	linux-kernel@...r.kernel.org, Akinobu Mita <mita@...aclelinux.com>
Subject: Re: [PATCH] bitops: move BITS() macro to the bitops file

On Wed, Aug 07, 2013 at 11:06:19AM +0200, Linus Walleij wrote:
> This macro was invented by Mattias Nilsson for the usecase
> where you want to set a sequence of bits inside a n-bit
> word, while leaving the head and tail of the sequence all
> zeroes. For example:
> 
>   #include <linux/bitops.h>
> 
>   u16 mask = BITS(4, 12);
> 
> Yields a mask like this:
> 
>   0001111111110000
> 
> This patch moves the construct out of the MFD PRCMU driver
> and make it available for common use, after noticing in a
> review or two that it would be useful for others.

Well, we have similar GEN_MASK and GENMASK macros around the tree. Maybe
we could unify them all?

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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