[PATCH v5 2/8] hugetlb: no need to drop hugetlb_lock to call cma_release

[Mike Kravetz]

Now that cma_release is non-blocking and irq safe, there is no need to
drop hugetlb_lock before calling.

Signed-off-by: Mike Kravetz <mike.krav...@oracle.com>
Acked-by: Roman Gushchin <g...@fb.com>
Acked-by: Michal Hocko <mho...@suse.com>
Reviewed-by: Oscar Salvador <osalva...@suse.de>
Reviewed-by: David Hildenbrand <da...@redhat.com>
---
 mm/hugetlb.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 07a95b8623ee..3a10b96a2124 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1348,14 +1348,8 @@ static void update_and_free_page(struct hstate *h, 
struct page *page)
        set_compound_page_dtor(page, NULL_COMPOUND_DTOR);
        set_page_refcounted(page);
        if (hstate_is_gigantic(h)) {
-               /*
-                * Temporarily drop the hugetlb_lock, because
-                * we might block in free_gigantic_page().
-                */
-               spin_unlock(&hugetlb_lock);
                destroy_compound_gigantic_page(page, huge_page_order(h));
                free_gigantic_page(page, huge_page_order(h));
-               spin_lock(&hugetlb_lock);
        } else {
                __free_pages(page, huge_page_order(h));
        }
-- 
2.30.2