[RFC PATCH mmotm] mm/z3fold.c: z3fold_page_isolate() can be static

[kbuild test robot <lkp@xxxxxxxxx>]

Fixes: eaa5a15c91fe ("mm/z3fold.c: support page migration")
Signed-off-by: kbuild test robot <lkp@xxxxxxxxx>
---
 z3fold.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/z3fold.c b/mm/z3fold.c
index d9eabfda..1ffecd6 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -1285,7 +1285,7 @@ static u64 z3fold_get_pool_size(struct z3fold_pool *pool)
 	return atomic64_read(&pool->pages_nr);
 }
 
-bool z3fold_page_isolate(struct page *page, isolate_mode_t mode)
+static bool z3fold_page_isolate(struct page *page, isolate_mode_t mode)
 {
 	struct z3fold_header *zhdr;
 	struct z3fold_pool *pool;
@@ -1320,8 +1320,8 @@ bool z3fold_page_isolate(struct page *page, isolate_mode_t mode)
 	return false;
 }
 
-int z3fold_page_migrate(struct address_space *mapping, struct page *newpage,
-			struct page *page, enum migrate_mode mode)
+static int z3fold_page_migrate(struct address_space *mapping, struct page *newpage,
+			       struct page *page, enum migrate_mode mode)
 {
 	struct z3fold_header *zhdr, *new_zhdr;
 	struct z3fold_pool *pool;
@@ -1379,7 +1379,7 @@ int z3fold_page_migrate(struct address_space *mapping, struct page *newpage,
 	return 0;
 }
 
-void z3fold_page_putback(struct page *page)
+static void z3fold_page_putback(struct page *page)
 {
 	struct z3fold_header *zhdr;
 	struct z3fold_pool *pool;