__BITMAP_MASK - NetBSD

Symbol: __BITMAP_MASK

sys/sys/bitops.h

((__typeof__((__v)->_b[0]))1 << ((__n) & __BITMAP_MASK(*(__v)->_b)))

tests/include/sys/t_bitops.c

ATF_CHECK_EQ_MSG((n = __BITMAP_MASK(uint32_t)), 31, "n=%zu", n);