[PATCH v3 1/2] mm: gup: move pmd_protnone() into gup_fast_pmd_leaf()

[Aristeu Rozanski <aris@ruivo.org>]

Make pmd handling match pud handling by calling pmd_protnone()
inside gup_fast_pmd_leaf().

Suggested-by: David Hildenbrand <david@kernel.org>
Link: https://lore.kernel.org/all/85e760cf-b994-40db-8d13-221feee55c60@redhat.com/T/#u
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Aristeu Rozanski <aris@ruivo.org>

---
 mm/gup.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/mm/gup.c	2026-02-17 23:14:22.288234753 -0500
+++ b/mm/gup.c	2026-02-17 23:31:36.522625385 -0500
@@ -2929,6 +2929,10 @@ static int gup_fast_pmd_leaf(pmd_t orig,
 	struct folio *folio;
 	int refs;
 
+	/* See gup_fast_pte_range() */
+	if (pmd_protnone(orig))
+		return 0;
+
 	if (!pmd_access_permitted(orig, flags & FOLL_WRITE))
 		return 0;
 
@@ -3024,10 +3028,6 @@ static int gup_fast_pmd_range(pud_t *pud
 			return 0;
 
 		if (unlikely(pmd_leaf(pmd))) {
-			/* See gup_fast_pte_range() */
-			if (pmd_protnone(pmd))
-				return 0;
-
 			if (!gup_fast_pmd_leaf(pmd, pmdp, addr, next, flags,
 				pages, nr))
 				return 0;