Roland> I thought about this a little. I think that any inline
Roland> function forces someone reading the code to look up what
Roland> it does, no matter how descriptive the name we come up
Roland> with. I think it would be better to use fls() directly.
Roland> I'm already in the habit of using ffs() to compute log_2
Roland> of powers of two but for some reason I never remember
Roland> fls().
Actually, since there's already roundup_pow_of_two() in kernel.h,
let's use that.
- R.
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