[PATCH 6/9] mm/truncate: Fix invalidate_complete_page2 for THPs

["Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>]

invalidate_complete_page2() currently open-codes page_cache_free_page(),
except for the part where it handles THP.  Rather than adding that,
call page_cache_free_page() from invalidate_complete_page2().

Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
 mm/filemap.c  | 3 +--
 mm/internal.h | 1 +
 mm/truncate.c | 5 +----
 3 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 62bc6affeb70..00de12d42bc4 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -228,8 +228,7 @@ void __delete_from_page_cache(struct page *page, void *shadow)
 	page_cache_delete(mapping, page, shadow);
 }
 
-static void page_cache_free_page(struct address_space *mapping,
-				struct page *page)
+void page_cache_free_page(struct address_space *mapping, struct page *page)
 {
 	void (*freepage)(struct page *);
 
diff --git a/mm/internal.h b/mm/internal.h
index 5aca7d7bc57c..1391e3239547 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -623,4 +623,5 @@ struct migration_target_control {
 };
 
 bool truncate_inode_partial_page(struct page *page, loff_t start, loff_t end);
+void page_cache_free_page(struct address_space *mapping, struct page *page);
 #endif	/* __MM_INTERNAL_H */
diff --git a/mm/truncate.c b/mm/truncate.c
index 30653b2717d3..bed24857d1d2 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -603,10 +603,7 @@ invalidate_complete_page2(struct address_space *mapping, struct page *page)
 	__delete_from_page_cache(page, NULL);
 	xa_unlock_irqrestore(&mapping->i_pages, flags);
 
-	if (mapping->a_ops->freepage)
-		mapping->a_ops->freepage(page);
-
-	put_page(page);	/* pagecache ref */
+	page_cache_free_page(mapping, page);
 	return 1;
 failed:
 	xa_unlock_irqrestore(&mapping->i_pages, flags);
-- 
2.28.0