[Patch v2 2/3] mm/khugepaged: continue to collapse on SCAN_PMD_NONE

[Wei Yang <richard.weiyang@gmail.com>]

SCAN_PMD_NONE means current pmd is empty, but we can still continue
collapse next pmd range.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
---
 mm/khugepaged.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 1fc8986a28b3..2ee5048b764e 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -2833,6 +2833,7 @@ int madvise_collapse(struct vm_area_struct *vma, unsigned long start,
 			goto handle_result;
 		/* Whitelisted set of results where continuing OK */
 		case SCAN_PMD_NULL:
+		case SCAN_PMD_NONE:
 		case SCAN_PTE_NON_PRESENT:
 		case SCAN_PTE_UFFD_WP:
 		case SCAN_LACK_REFERENCED_PAGE:
-- 
2.34.1