VM_HIGHMEM_BASE
totalsize = VM_HIGHMEM_BASE + (totalsize - VM_LOWMEM_LIMIT);
gpa = VM_LOWMEM_LIMIT > 0 ? 0 : VM_HIGHMEM_BASE;
gpa = VM_HIGHMEM_BASE;
if (highsize > 0 && gaddr >= VM_HIGHMEM_BASE) {
if (gaddr < VM_HIGHMEM_BASE + highsize && len <= highsize &&
gaddr + len <= VM_HIGHMEM_BASE + highsize)
if (offaddr >= VM_HIGHMEM_BASE &&
offaddr < VM_HIGHMEM_BASE + highsize)
return (VM_HIGHMEM_BASE);