[PATCH 11/13] mm/writeback: add folio_mark_dirty_lock()

[Joanne Koong <joannelkoong@xxxxxxxxx>]

Add a new convenience helper folio_mark_dirty_lock() that grabs the
folio lock before calling folio_mark_dirty().

Signed-off-by: Joanne Koong <joannelkoong@xxxxxxxxx>
---
 include/linux/mm.h  |  1 +
 mm/page-writeback.c | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index ecf63d2b0582..446d7096c48f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2539,6 +2539,7 @@ struct kvec;
 struct page *get_dump_page(unsigned long addr);
 
 bool folio_mark_dirty(struct folio *folio);
+bool folio_mark_dirty_lock(struct folio *folio);
 bool set_page_dirty(struct page *page);
 int set_page_dirty_lock(struct page *page);
 
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index fcd4c1439cb9..9b1c95dd219c 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2913,6 +2913,18 @@ bool folio_mark_dirty(struct folio *folio)
 }
 EXPORT_SYMBOL(folio_mark_dirty);
 
+bool folio_mark_dirty_lock(struct folio *folio)
+{
+	bool ret;
+
+	folio_lock(folio);
+	ret = folio_mark_dirty(folio);
+	folio_unlock(folio);
+
+	return ret;
+}
+EXPORT_SYMBOL(folio_mark_dirty_lock);
+
 /*
  * set_page_dirty() is racy if the caller has no reference against
  * page->mapping->host, and if the page is unlocked.  This is because another
-- 
2.43.5