[PATCH 41/45] mm/migrate_device: Make migrate_vma_test_walk skip hugetlb vmas

[Oscar Salvador]

Skip hugetlb vmas as we are not interested in those.

Signed-off-by: Oscar Salvador <osalvador@xxxxxxx>
---
 mm/migrate_device.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/mm/migrate_device.c b/mm/migrate_device.c
index 6d66dc1c6ffa..c44ac45b207d 100644
--- a/mm/migrate_device.c
+++ b/mm/migrate_device.c
@@ -279,8 +279,20 @@ static int migrate_vma_collect_pmd(pmd_t *pmdp,
 	return 0;
 }
 
+static int migrate_vma_test_walk(unsigned long start, unsigned long end,
+				 struct mm_walk *walk)
+{
+	struct vm_area_struct *vma = walk->vma;
+
+	if (is_vm_hugetlb_page(vma))
+		return 1;
+
+	return 0;
+}
+
 static const struct mm_walk_ops migrate_vma_walk_ops = {
 	.pmd_entry		= migrate_vma_collect_pmd,
+	.test_walk		= migrate_vma_test_walk,
 	.pte_hole		= migrate_vma_collect_hole,
 	.walk_lock		= PGWALK_RDLOCK,
 };
-- 
2.26.2