| Date | Sun, 28 Nov 2021 05:37:19 +0100 | From | Michał Mirosław <> | Subject | Re: [PATCH 2/9] lib/bitmap: implement bitmap_{empty,full} with bitmap_weight_eq() |
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On Sat, Nov 27, 2021 at 07:56:57PM -0800, Yury Norov wrote: > Now as we have bitmap_weight_eq(), switch bitmap_full() and > bitmap_empty() to using it. [...] > -static inline bool bitmap_empty(const unsigned long *src, unsigned nbits) > -{ > - if (small_const_nbits(nbits)) > - return ! (*src & BITMAP_LAST_WORD_MASK(nbits)); > - > - return find_first_bit(src, nbits) == nbits; > -} [...] > +static __always_inline bool bitmap_empty(const unsigned long *src, unsigned int nbits) > +{ > + return bitmap_weight_eq(src, nbits, 0); > +} [..]
What's the speed difference? Have you benchmarked this?
Best Regards Michał Mirosław
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