MAP_ALIGNED
MAP_PRIVATE | MAP_ANON | MAP_ALIGNED(align), -1, 0);
MAP_ALIGNED(chunksize_2pow));
MAP_ANON|MAP_PRIVATE|MAP_ALIGNED(pu->pu_cc_stackshift), -1, 0);
#ifndef MAP_ALIGNED
MAP_PRIVATE | MAP_ANON | MAP_ALIGNED(alignbit), -1, 0);
mapflags |= MAP_ALIGNED(log2);
#define MAP_ALIGNMENT_MASK MAP_ALIGNED(0xff)
#define MAP_ALIGNMENT_64KB MAP_ALIGNED(16) /* 2^16 */
#define MAP_ALIGNMENT_16MB MAP_ALIGNED(24) /* 2^24 */
#define MAP_ALIGNMENT_4GB MAP_ALIGNED(32) /* 2^32 */
#define MAP_ALIGNMENT_1TB MAP_ALIGNED(40) /* 2^40 */
#define MAP_ALIGNMENT_256TB MAP_ALIGNED(48) /* 2^48 */
#define MAP_ALIGNMENT_64PB MAP_ALIGNED(56) /* 2^56 */