From f143f1ea5a5380b2682e6836fcd24338a2aa82c7 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Sat, 24 Apr 2021 12:00:48 -0400 Subject: mm/writeback: Add folio_start_writeback() Rename set_page_writeback() to folio_start_writeback() to match folio_end_writeback(). Do not bother with wrappers that return void; callers are perfectly capable of ignoring return values. Add wrappers for set_page_writeback(), set_page_writeback_keepwrite() and test_set_page_writeback() for compatibililty with existing filesystems. The main advantage of this patch is getting the statistics right, although it does eliminate a couple of calls to compound_head(). Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: David Howells Acked-by: Vlastimil Babka --- mm/folio-compat.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'mm/folio-compat.c') diff --git a/mm/folio-compat.c b/mm/folio-compat.c index 2ccd8f213fc4..10ce5582d869 100644 --- a/mm/folio-compat.c +++ b/mm/folio-compat.c @@ -71,3 +71,9 @@ void migrate_page_copy(struct page *newpage, struct page *page) } EXPORT_SYMBOL(migrate_page_copy); #endif + +bool set_page_writeback(struct page *page) +{ + return folio_start_writeback(page_folio(page)); +} +EXPORT_SYMBOL(set_page_writeback); -- cgit