[PATCH 4/7] mm/hugetlb: Prepare hugetlb_follow_page_mask() for FOLL_PIN

[Peter Xu <peterx@redhat.com>]

It's coming, not yet, but soon.  Loose the restriction.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 mm/hugetlb.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index f037eaf9d819..31d8f18bc2e4 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -6467,13 +6467,6 @@ struct page *hugetlb_follow_page_mask(struct vm_area_struct *vma,
 	spinlock_t *ptl;
 	pte_t *pte, entry;
 
-	/*
-	 * FOLL_PIN is not supported for follow_page(). Ordinary GUP goes via
-	 * follow_hugetlb_page().
-	 */
-	if (WARN_ON_ONCE(flags & FOLL_PIN))
-		return NULL;
-
 	hugetlb_vma_lock_read(vma);
 	pte = hugetlb_walk(vma, haddr, huge_page_size(h));
 	if (!pte)
-- 
2.40.1