linux-kernel - [PATCH v2 22/27] mm: Add wait_on_folio_locked & wait_on_folio_locked

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Date:   Mon, 18 Jan 2021 17:01:43 +0000
From:   "Matthew Wilcox (Oracle)" <willy@...radead.org>
To:     linux-fsdevel@...r.kernel.org, linux-mm@...ck.org
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 22/27] mm: Add wait_on_folio_locked & wait_on_folio_locked_killable

Turn wait_on_page_locked() and wait_on_page_locked_killable() into
wrappers.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
 include/linux/pagemap.h | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 619bfc6ea1ff..d28b53f91275 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -729,21 +729,29 @@ extern int wait_on_folio_bit_killable(struct folio *folio, int bit_nr);
  * ie with increased "page->count" so that the page won't
  * go away during the wait..
  */
-static inline void wait_on_page_locked(struct page *page)
+static inline void wait_on_folio_locked(struct folio *folio)
 {
-	struct folio *folio = page_folio(page);
 	if (FolioLocked(folio))
 		wait_on_folio_bit(folio, PG_locked);
 }
 
-static inline int wait_on_page_locked_killable(struct page *page)
+static inline int wait_on_folio_locked_killable(struct folio *folio)
 {
-	struct folio *folio = page_folio(page);
 	if (!FolioLocked(folio))
 		return 0;
 	return wait_on_folio_bit_killable(folio, PG_locked);
 }
 
+static inline void wait_on_page_locked(struct page *page)
+{
+	wait_on_folio_locked(page_folio(page));
+}
+
+static inline int wait_on_page_locked_killable(struct page *page)
+{
+	return wait_on_folio_locked_killable(page_folio(page));
+}
+
 extern void put_and_wait_on_page_locked(struct page *page);
 
 void wait_on_folio_writeback(struct folio *folio);
-- 
2.29.2