secretmem: Convert to free_folio

Matthew Wilcox (Oracle) · Matthew Wilcox (Oracle) · commit 6612ed24a242 · 2022-05-09T23:12:53.000-04:00
Prepare for any size of folio, even though secretmem only uses order-0
folios for now.

Signed-off-by: Matthew Wilcox (Oracle) &lt;willy@infradead.org&gt;
diff --git a/mm/secretmem.c b/mm/secretmem.c
@@ -145,15 +145,15 @@ static int secretmem_migratepage(struct address_space *mapping,
 	return -EBUSY;
 }
 
-static void secretmem_freepage(struct page *page)
+static void secretmem_free_folio(struct folio *folio)
 {
-	set_direct_map_default_noflush(page);
-	clear_highpage(page);
+	set_direct_map_default_noflush(&folio->page);
+	folio_zero_segment(folio, 0, folio_size(folio));
 }
 
 const struct address_space_operations secretmem_aops = {
 	.dirty_folio	= noop_dirty_folio,
-	.freepage	= secretmem_freepage,
+	.free_folio	= secretmem_free_folio,
 	.migratepage	= secretmem_migratepage,
 	.isolate_page	= secretmem_isolate_page,
 };

Original file line number	Diff line number	Diff line change
`@@ -145,15 +145,15 @@ static int secretmem_migratepage(struct address_space *mapping,`
`145`	`145`	`return -EBUSY;`
`146`	`146`	`}`
`147`	`147`
`148`		`-static void secretmem_freepage(struct page *page)`
	`148`	`+static void secretmem_free_folio(struct folio *folio)`
`149`	`149`	`{`
`150`		`- set_direct_map_default_noflush(page);`
`151`		`- clear_highpage(page);`
	`150`	`+ set_direct_map_default_noflush(&folio->page);`
	`151`	`+ folio_zero_segment(folio, 0, folio_size(folio));`
`152`	`152`	`}`
`153`	`153`
`154`	`154`	`const struct address_space_operations secretmem_aops = {`
`155`	`155`	`.dirty_folio = noop_dirty_folio,`
`156`		`- .freepage = secretmem_freepage,`
	`156`	`+ .free_folio = secretmem_free_folio,`
`157`	`157`	`.migratepage = secretmem_migratepage,`
`158`	`158`	`.isolate_page = secretmem_isolate_page,`
`159`	`159`	`};`