- if (!err && !(flags & MAP_NONBLOCK)) {
- if (vma->vm_flags & VM_LOCKED) {
- /*
- * might be mapping previously unmapped range of file
- */
- mlock_vma_pages_range(vma, start, start + size);
- } else {
- if (unlikely(has_write_lock)) {
- downgrade_write(&mm->mmap_sem);
- has_write_lock = 0;
- }
- make_pages_present(start, start+size);
- }
- }