FIRST_USER_ADDRESS
(((flags) & MAP_FIXED && (addr) < FIRST_USER_ADDRESS) ? -EINVAL : 0)
info.low_limit = FIRST_USER_ADDRESS;
#ifndef FIRST_USER_ADDRESS
total_user_pages = (TASK_SIZE - FIRST_USER_ADDRESS) / PAGE_SIZE;
random_vaddr = FIRST_USER_ADDRESS + random_pages * PAGE_SIZE;
vms->unmap_start = FIRST_USER_ADDRESS;
if (address < mmap_min_addr || address < FIRST_USER_ADDRESS)
unmap->pg_start = FIRST_USER_ADDRESS;
unmap->vma_start = FIRST_USER_ADDRESS;
FIRST_USER_ADDRESS, \
walk->next_addr = FIRST_USER_ADDRESS;