gru: add hugepage support

Add support for hugepages. Easier than I originally thought.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
index b56009f9203a..929d6073e600 100644
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c
@@ -192,10 +192,11 @@ static int non_atomic_pte_lookup(struct vm_area_struct *vma,
 {
         struct page *page;
 
-        /* ZZZ Need to handle HUGE pages */
-        if (is_vm_hugetlb_page(vma))
-                return -EFAULT;
+#ifdef CONFIG_HUGETLB_PAGE
+        *pageshift = is_vm_hugetlb_page(vma) ? HPAGE_SHIFT : PAGE_SHIFT;
+#else
         *pageshift = PAGE_SHIFT;
+#endif
         if (get_user_pages
             (current, current->mm, vaddr, 1, write, 0, &page, NULL) <= 0)
                 return -EFAULT;