5 #include <linux/bitops.h>
7 int __bitmap_weight(const unsigned long *bitmap, int bits);
9 #define BITMAP_LAST_WORD_MASK(nbits) \
11 ((nbits) % BITS_PER_LONG) ? \
12 (1UL<<((nbits) % BITS_PER_LONG))-1 : ~0UL \
15 #define small_const_nbits(nbits) \
16 (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)
18 static inline void bitmap_zero(unsigned long *dst, int nbits)
20 if (small_const_nbits(nbits))
23 int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
28 static inline int bitmap_weight(const unsigned long *src, int nbits)
30 if (small_const_nbits(nbits))
31 return hweight_long(*src & BITMAP_LAST_WORD_MASK(nbits));
32 return __bitmap_weight(src, nbits);
35 #endif /* _PERF_BITOPS_H */