From 3f0c6a07fee6a1c2618a2e12ffb8e9aa24384fde Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Mon, 8 Mar 2021 11:45:35 -0500 Subject: mm/filemap: Add filemap_get_folio filemap_get_folio() is a replacement for find_get_page(). Turn pagecache_get_page() into a wrapper around __filemap_get_folio(). Remove find_lock_head() as this use case is now covered by filemap_get_folio(). Reduces overall kernel size by 209 bytes. __filemap_get_folio() is 316 bytes shorter than pagecache_get_page() was, but the new pagecache_get_page() wrapper is 99 bytes. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: David Howells Acked-by: Vlastimil Babka --- mm/folio-compat.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'mm/folio-compat.c') diff --git a/mm/folio-compat.c b/mm/folio-compat.c index 6b19bc4ed6b0..e833e680e944 100644 --- a/mm/folio-compat.c +++ b/mm/folio-compat.c @@ -115,3 +115,15 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping, return filemap_add_folio(mapping, page_folio(page), index, gfp); } EXPORT_SYMBOL(add_to_page_cache_lru); + +struct page *pagecache_get_page(struct address_space *mapping, pgoff_t index, + int fgp_flags, gfp_t gfp) +{ + struct folio *folio; + + folio = __filemap_get_folio(mapping, index, fgp_flags, gfp); + if ((fgp_flags & FGP_HEAD) || !folio || xa_is_value(folio)) + return &folio->page; + return folio_file_page(folio, index); +} +EXPORT_SYMBOL(pagecache_get_page); -- cgit v1.2.3