[PATCH 2/4] hugetlb: update_and_free_page(): don't clear PG_reserved bit

[Luiz Capitulino <lcapitulino@redhat.com>]

Hugepages pages never get the PG_reserved bit set, so don't clear it. But
add a warning just in case.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
 mm/hugetlb.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 8c50547..7e07e47 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -581,8 +581,9 @@ static void update_and_free_page(struct hstate *h, struct page *page)
 	for (i = 0; i < pages_per_huge_page(h); i++) {
 		page[i].flags &= ~(1 << PG_locked | 1 << PG_error |
 				1 << PG_referenced | 1 << PG_dirty |
-				1 << PG_active | 1 << PG_reserved |
-				1 << PG_private | 1 << PG_writeback);
+				1 << PG_active | 1 << PG_private |
+				1 << PG_writeback);
+		WARN_ON(PageReserved(&page[i]));
 	}
 	VM_BUG_ON_PAGE(hugetlb_cgroup_from_page(page), page);
 	set_compound_page_dtor(page, NULL);
-- 
1.8.1.4

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