There are cases where, if an attempted collapse fails, all subsequent
orders are guaranteed to also fail. Avoid these collapse attempts by
bailing out early.

Reviewed-by: Lorenzo Stoakes <ljs@kernel.org>
Acked-by: Usama Arif <redacted>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Signed-off-by: Nico Pache <npache@redhat.com>
---
 mm/khugepaged.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 430047316f43..7de92b28dd30 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c

@@ -1499,6 +1499,7 @@ static enum scan_result mthp_collapse(struct mm_struct *mm,
 			collapse_address = address + offset * PAGE_SIZE;
 			ret = collapse_huge_page(mm, collapse_address, referenced,
 						 unmapped, cc, order);
+