[PATCH 4/8] iomap: Accept a NULL iomap_writepage_ctx in iomap_submit_ioend()

["Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>]

Prepare for I/O without an iomap_writepage_ctx() by accepting a NULL
wpc.

Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
 fs/iomap/buffered-io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index d92943332c6c..ad9d8fe97f2e 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -1172,7 +1172,7 @@ iomap_submit_ioend(struct iomap_writepage_ctx *wpc, struct iomap_ioend *ioend,
 	ioend->io_bio->bi_private = ioend;
 	ioend->io_bio->bi_end_io = iomap_writepage_end_bio;
 
-	if (wpc->ops->prepare_ioend)
+	if (wpc && wpc->ops->prepare_ioend)
 		error = wpc->ops->prepare_ioend(ioend, error);
 	if (error) {
 		/*
-- 
2.30.2