[PATCH 1/1] mm,swapops: Fix compile error on set_pmd_migration_entry.

[Wale Zhang <wale.zhang.ftd@gmail.com>]

../include/linux/swapops.h: In function ‘set_pmd_migration_entry’:
../include/linux/swapops.h:346:1: error: no return statement in function returning non-void [-Werror=return-type]
  346 | }
      | ^
cc1: some warnings being treated as errors

Signed-off-by: Wale Zhang <wale.zhang.ftd@gmail.com>
---
 include/linux/swapops.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/swapops.h b/include/linux/swapops.h
index 8cfc966eae48..84eb36d97212 100644
--- a/include/linux/swapops.h
+++ b/include/linux/swapops.h
@@ -343,6 +343,7 @@ static inline int set_pmd_migration_entry(struct page_vma_mapped_walk *pvmw,
 		struct page *page)
 {
 	BUILD_BUG();
+	return 0;
 }
 
 static inline void remove_migration_pmd(struct page_vma_mapped_walk *pvmw,
-- 
2.43.0