[PATCH v4 12/15] iomap: make iomap_read_folio() a void return

[Joanne Koong <joannelkoong@gmail.com>]

No errors are propagated in iomap_read_folio(). Change
iomap_read_folio() to a void return to make this clearer to callers.

Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
---
 fs/iomap/buffered-io.c | 9 +--------
 include/linux/iomap.h  | 2 +-
 2 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index ed2acbcb81b8..9376aadb2071 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -450,7 +450,7 @@ static int iomap_read_folio_iter(struct iomap_iter *iter,
 	return 0;
 }
 
-int iomap_read_folio(const struct iomap_ops *ops,
+void iomap_read_folio(const struct iomap_ops *ops,
 		struct iomap_read_folio_ctx *ctx)
 {
 	struct folio *folio = ctx->cur_folio;
@@ -481,13 +481,6 @@ int iomap_read_folio(const struct iomap_ops *ops,
 
 	if (!folio_owned)
 		folio_unlock(folio);
-
-	/*
-	 * Just like mpage_readahead and block_read_full_folio, we always
-	 * return 0 and just set the folio error flag on errors.  This
-	 * should be cleaned up throughout the stack eventually.
-	 */
-	return 0;
 }
 EXPORT_SYMBOL_GPL(iomap_read_folio);
 
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index c1a7613bca6e..f76e9b46595a 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -338,7 +338,7 @@ static inline bool iomap_want_unshare_iter(const struct iomap_iter *iter)
 ssize_t iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *from,
 		const struct iomap_ops *ops,
 		const struct iomap_write_ops *write_ops, void *private);
-int iomap_read_folio(const struct iomap_ops *ops,
+void iomap_read_folio(const struct iomap_ops *ops,
 		struct iomap_read_folio_ctx *ctx);
 void iomap_readahead(const struct iomap_ops *ops,
 		struct iomap_read_folio_ctx *ctx);
-- 
2.47.3