mm/hmm.c: allow VM_MIXEDMAP to work with hmm_range_fault

[linux-2.6-microblaze.git] / lib / test_hmm.c

diff --git a/lib/test_hmm.c b/lib/test_hmm.c
index e2ce8f9..7675380 100644 (file)
--- a/lib/test_hmm.c
+++ b/lib/test_hmm.c
@@ -1086,9 +1086,33 @@ static long dmirror_fops_unlocked_ioctl(struct file *filp,
        return 0;
 }
 
+static int dmirror_fops_mmap(struct file *file, struct vm_area_struct *vma)
+{
+       unsigned long addr;
+
+       for (addr = vma->vm_start; addr < vma->vm_end; addr += PAGE_SIZE) {
+               struct page *page;
+               int ret;
+
+               page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+               if (!page)
+                       return -ENOMEM;
+
+               ret = vm_insert_page(vma, addr, page);
+               if (ret) {
+                       __free_page(page);
+                       return ret;
+               }
+               put_page(page);
+       }
+
+       return 0;
+}
+
 static const struct file_operations dmirror_fops = {
        .open           = dmirror_fops_open,
        .release        = dmirror_fops_release,
+       .mmap           = dmirror_fops_mmap,
        .unlocked_ioctl = dmirror_fops_unlocked_ioctl,
        .llseek         = default_llseek,
        .owner          = THIS_MODULE,