Re: [patch 2/2] [PATCH] mm: Save soft-dirty bits on file pages

From: H. Peter Anvin
Date: Tue Aug 13 2013 - 12:44:26 EST

On 08/13/2013 08:37 AM, Cyrill Gorcunov wrote:
>> Does it actually matter, generated-code-wise, or is the compiler smart
>> enough to figure it out? The reason I'm asking is because it makes the
> gcc-4.7.2 is smart enough to suppress useless masking (ie ((1u << 31) - 1))
> completely but I don't know if this can be assumed for all gcc series.

I would be highly surprised if it wasn't the case for any gcc we care about.


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