BITS_TO_LONGS
return kcalloc(BITS_TO_LONGS(n), sizeof(long), flags);
unsigned long xehp[BITS_TO_LONGS(I915_MAX_SS_FUSE_BITS)];
unsigned long y420_vdb_modes[BITS_TO_LONGS(256)];
unsigned long y420_cmdb_modes[BITS_TO_LONGS(256)];
#define DECLARE_BITMAP(x, y) unsigned long x[BITS_TO_LONGS(y)];