could anybody help me on this? thanks!
see if we call bitmap_zero(dst, 2), it will do *dst = 0UL and thus clear
whole *dst, but what if we intent to clear 2 bits? not 32bits?
static inline void bitmap_zero(unsigned long *dst, int nbits)
{
if (nbits <= BITS_PER_LONG)
*dst = 0UL;
else {
int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
memset(dst, 0, len);
}
}
Ming
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