[Patch 26/29] GRU - Add hugepage support

[steiner]

From: Jack Steiner <steiner@xxxxxxx>

Add support for hugepages. Easier than I originally thought.

Signed-off-by: Jack Steiner <steiner@xxxxxxx>

---
 drivers/misc/sgi-gru/grufault.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

Index: linux/drivers/misc/sgi-gru/grufault.c
===================================================================
--- linux.orig/drivers/misc/sgi-gru/grufault.c	2009-11-20 09:32:36.000000000 -0600
+++ linux/drivers/misc/sgi-gru/grufault.c	2009-11-20 09:32:38.000000000 -0600
@@ -192,10 +192,11 @@ static int non_atomic_pte_lookup(struct 
 {
 	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;

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