[RFC PATCH 3/5] asm-generic/bitops/atomic.h: Rewrite using atomic_fetch_*

[Peter Zijlstra]

On Fri, Feb 16, 2018 at 11:35:20AM +0100, Peter Zijlstra wrote:

> #define BIT_U32_MASK(nr)	(1UL << ((nr) % 32))
> #define BIT_U32_WORD(nr)	(((nr) / 32) ^ (4 * __BIG_ENDIAN__))

s/4 *//

it's already a 4 byte offset.