[PATCH v2 1/6] shmem: remove check for folio lock on writepage()

[Luis Chamberlain]

Matthew notes we should not need to check the folio lock
on the writepage() callback so remove it. This sanity check
has been lingering since linux-history days. We remove this
as we tidy up the writepage() callback to make things a bit
clearer.

Suggested-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Christian Brauner <brauner@xxxxxxxxxx>
Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
---
 mm/shmem.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 1af85259b6fc..7fff1a3af092 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1354,7 +1354,6 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc)
 		folio_clear_dirty(folio);
 	}
 
-	BUG_ON(!folio_test_locked(folio));
 	mapping = folio->mapping;
 	index = folio->index;
 	inode = mapping->host;
-- 
2.39.1