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authorMatthew Wilcox (Oracle) <willy@infradead.org>2021-03-08 11:45:35 -0500
committerMatthew Wilcox (Oracle) <willy@infradead.org>2021-10-18 07:49:40 -0400
commit3f0c6a07fee6a1c2618a2e12ffb8e9aa24384fde (patch)
tree7f0d6aa86b8d046fb902a272c48c8e8dc5c78272 /mm/folio-compat.c
parentbca65eeab1db74f83661a49ebdaf87414fc4938e (diff)
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) <willy@infradead.org> Reviewed-by: David Howells <dhowells@redhat.com> Acked-by: Vlastimil Babka <vbabka@suse.cz>
Diffstat (limited to 'mm/folio-compat.c')
-rw-r--r--mm/folio-compat.c12
1 files changed, 12 insertions, 0 deletions
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);