Re: [PATCH] scsi: qla1280: Replace arithmetic addition by bitwise OR

From: Bart Van Assche
Date: Sat Feb 11 2023 - 18:25:43 EST


On 2/7/23 03:54, Deepak R Varma wrote:
When adding two bit-field mask values, an OR operation offers higher
performance over an arithmetic operation. So, convert such addition to
an OR based expression.

Where is the evidence that supports this claim? On the following page I read that there is no performance difference when using a modern CPU: https://cs.stackexchange.com/questions/75811/why-is-addition-as-fast-as-bit-wise-operations-in-modern-processors

Issue identified using orplus.cocci semantic patch script.

Where is that script located? Can it be deleted such that submission of patches similar to this patch stops?

Thanks,

Bart.