@@ -813,6 +813,7 @@ int wait_on_folio_writeback_killable(struct folio *folio);
void end_page_writeback(struct page *page);
void end_folio_writeback(struct folio *folio);
void wait_for_stable_page(struct page *page);
+void wait_for_stable_folio(struct folio *folio);
void page_endio(struct page *page, bool is_write, int err);
@@ -29,3 +29,9 @@ void wait_on_page_writeback(struct page *page)
return wait_on_folio_writeback(page_folio(page));
}
EXPORT_SYMBOL_GPL(wait_on_page_writeback);
+
+void wait_for_stable_page(struct page *page)
+{
+ return wait_for_stable_folio(page_folio(page));
+}
+EXPORT_SYMBOL_GPL(wait_for_stable_page);
@@ -2862,17 +2862,16 @@ int wait_on_folio_writeback_killable(struct folio *folio)
EXPORT_SYMBOL_GPL(wait_on_folio_writeback_killable);
/**
- * wait_for_stable_page() - wait for writeback to finish, if necessary.
- * @page: The page to wait on.
+ * wait_for_stable_folio() - wait for writeback to finish, if necessary.
+ * @folio: The folio to wait on.
*
- * This function determines if the given page is related to a backing device
- * that requires page contents to be held stable during writeback. If so, then
+ * This function determines if the given folio is related to a backing device
+ * that requires folio contents to be held stable during writeback. If so, then
* it will wait for any pending writeback to complete.
*/
-void wait_for_stable_page(struct page *page)
+void wait_for_stable_folio(struct folio *folio)
{
- page = thp_head(page);
- if (page->mapping->host->i_sb->s_iflags & SB_I_STABLE_WRITES)
- wait_on_page_writeback(page);
+ if (folio->page.mapping->host->i_sb->s_iflags & SB_I_STABLE_WRITES)
+ wait_on_folio_writeback(folio);
}
-EXPORT_SYMBOL_GPL(wait_for_stable_page);
+EXPORT_SYMBOL_GPL(wait_for_stable_folio);
Move wait_for_stable_page() into the folio compatibility file. wait_for_stable_folio() avoids a call to compound_head() and is 14 bytes smaller than wait_for_stable_page() was. The net text size grows by 24 bytes as a result of this patch. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> --- include/linux/pagemap.h | 1 + mm/folio-compat.c | 6 ++++++ mm/page-writeback.c | 17 ++++++++--------- 3 files changed, 15 insertions(+), 9 deletions(-)