Re: [PATCH] ARCv2: spinlock/rwlock/atomics: reduce 1 instruction in exponential backoff

[Peter Zijlstra]

On Fri, Aug 07, 2015 at 01:52:19PM +0530, Vineet Gupta wrote:
> The increment of delay counter was 2 instructions:
> Arithmatic Shfit Left (ASL) + set to 1 on overflow
> 
> This can be done in 1 using ROtate Left (ROL)

Cute :-)
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