s390/mm: implement 5 level pages tables
Add the logic to upgrade the page table for a 64-bit process to
five levels. This increases the TASK_SIZE from 8PB to 16EB-4K.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c
index b017dae..8c5f284 100644
--- a/arch/s390/mm/mmap.c
+++ b/arch/s390/mm/mmap.c
@@ -120,7 +120,7 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
check_asce_limit:
if (addr + len > current->mm->context.asce_limit) {
- rc = crst_table_upgrade(mm);
+ rc = crst_table_upgrade(mm, addr + len);
if (rc)
return (unsigned long) rc;
}
@@ -184,7 +184,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
check_asce_limit:
if (addr + len > current->mm->context.asce_limit) {
- rc = crst_table_upgrade(mm);
+ rc = crst_table_upgrade(mm, addr + len);
if (rc)
return (unsigned long) rc;
}