#define BITS_PER_LONG (8 * sizeof(unsigned long))
#endif
+#define BITFIELD_SIZE(_n) (((_n) + (BITS_PER_LONG - 1)) / BITS_PER_LONG)
+
static inline void bitfield_set(unsigned long *bits, int bit)
{
bits[bit / BITS_PER_LONG] |= (1UL << (bit % BITS_PER_LONG));