[PATCH 2/8] mm: hugetlb: use get_page_foll in follow_hugetlb_page

[Andrea Arcangeli]

get_page_foll is more optimal and is always safe to use under the PT
lock. More so for hugetlbfs as there's no risk of race conditions with
split_huge_page regardless of the PT lock.

Reviewed-by: Khalid Aziz <khalid.aziz@xxxxxxxxxx>
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
---
 mm/hugetlb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 14737f8e..f03e068 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3113,7 +3113,7 @@ long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma,
 same_page:
 		if (pages) {
 			pages[i] = mem_map_offset(page, pfn_offset);
-			get_page(pages[i]);
+			get_page_foll(pages[i]);
 		}
 
 		if (vmas)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/