[PATCH v6 1/7] mm: make alloc_demote_folio externally invokable for migration

[Honggyu Kim]

The alloc_demote_folio can be used out of vmscan.c so it'd be better to
remove static keyword from it.

Signed-off-by: Honggyu Kim <honggyu.kim@xxxxxx>
Reviewed-by: SeongJae Park <sj@xxxxxxxxxx>
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
---
 mm/internal.h | 1 +
 mm/vmscan.c   | 3 +--
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/internal.h b/mm/internal.h
index b2c75b12014e..b3ca996a4efc 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -1052,6 +1052,7 @@ extern unsigned long  __must_check vm_mmap_pgoff(struct file *, unsigned long,
         unsigned long, unsigned long);
 
 extern void set_pageblock_order(void);
+struct folio *alloc_demote_folio(struct folio *src, unsigned long private);
 unsigned long reclaim_pages(struct list_head *folio_list);
 unsigned int reclaim_clean_pages_from_list(struct zone *zone,
 					    struct list_head *folio_list);
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 2e34de9cd0d4..2f4406872f43 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -916,8 +916,7 @@ static void folio_check_dirty_writeback(struct folio *folio,
 		mapping->a_ops->is_dirty_writeback(folio, dirty, writeback);
 }
 
-static struct folio *alloc_demote_folio(struct folio *src,
-		unsigned long private)
+struct folio *alloc_demote_folio(struct folio *src, unsigned long private)
 {
 	struct folio *dst;
 	nodemask_t *allowed_mask;
-- 
2.34.1