[PATCH v7 27/28] mm/filemap: Convert wake_up_page_bit to wake_up_folio_bit

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

All callers have a folio, so use it directly.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jeff Layton <jlayton@kernel.org>
---
 mm/filemap.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 8f07e21a8f29..dfdc04130c5b 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1121,14 +1121,14 @@ static int wake_page_function(wait_queue_entry_t *wait, unsigned mode, int sync,
 	return (flags & WQ_FLAG_EXCLUSIVE) != 0;
 }
 
-static void wake_up_page_bit(struct page *page, int bit_nr)
+static void wake_up_folio_bit(struct folio *folio, int bit_nr)
 {
-	wait_queue_head_t *q = page_waitqueue(page);
+	wait_queue_head_t *q = page_waitqueue(&folio->page);
 	struct wait_page_key key;
 	unsigned long flags;
 	wait_queue_entry_t bookmark;
 
-	key.page = page;
+	key.page = &folio->page;
 	key.bit_nr = bit_nr;
 	key.page_match = 0;
 
@@ -1163,7 +1163,7 @@ static void wake_up_page_bit(struct page *page, int bit_nr)
 	 * page waiters.
 	 */
 	if (!waitqueue_active(q) || !key.page_match) {
-		ClearPageWaiters(page);
+		ClearFolioWaiters(folio);
 		/*
 		 * It's possible to miss clearing Waiters here, when we woke
 		 * our page waiters, but the hashed waitqueue has waiters for
@@ -1179,7 +1179,7 @@ static void wake_up_folio(struct folio *folio, int bit)
 {
 	if (!FolioWaiters(folio))
 		return;
-	wake_up_page_bit(&folio->page, bit);
+	wake_up_folio_bit(folio, bit);
 }
 
 /*
@@ -1444,7 +1444,7 @@ void unlock_folio(struct folio *folio)
 	BUILD_BUG_ON(PG_waiters != 7);
 	VM_BUG_ON_FOLIO(!FolioLocked(folio), folio);
 	if (clear_bit_unlock_is_negative_byte(PG_locked, folio_flags(folio, 0)))
-		wake_up_page_bit(&folio->page, PG_locked);
+		wake_up_folio_bit(folio, PG_locked);
 }
 EXPORT_SYMBOL(unlock_folio);
 
@@ -1461,11 +1461,12 @@ EXPORT_SYMBOL(unlock_folio);
  */
 void end_page_private_2(struct page *page)
 {
-	page = compound_head(page);
-	VM_BUG_ON_PAGE(!PagePrivate2(page), page);
-	clear_bit_unlock(PG_private_2, &page->flags);
-	wake_up_page_bit(page, PG_private_2);
-	put_page(page);
+	struct folio *folio = page_folio(page);
+
+	VM_BUG_ON_FOLIO(!FolioPrivate2(folio), folio);
+	clear_bit_unlock(PG_private_2, folio_flags(folio, 0));
+	wake_up_folio_bit(folio, PG_private_2);
+	put_folio(folio);
 }
 EXPORT_SYMBOL(end_page_private_2);
 
-- 
2.30.2