[PATCH] cifs: switch to noop_direct_IO

[Jeff Layton <jlayton@kernel.org>]

The cifs one is identical to the noop one. Just use it instead.

Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/cifs/file.c | 21 +--------------------
 1 file changed, 1 insertion(+), 20 deletions(-)

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index d0216472f1c6..2406b9ddd623 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -4890,25 +4890,6 @@ void cifs_oplock_break(struct work_struct *work)
 	cifs_done_oplock_break(cinode);
 }
 
-/*
- * The presence of cifs_direct_io() in the address space ops vector
- * allowes open() O_DIRECT flags which would have failed otherwise.
- *
- * In the non-cached mode (mount with cache=none), we shunt off direct read and write requests
- * so this method should never be called.
- *
- * Direct IO is not yet supported in the cached mode. 
- */
-static ssize_t
-cifs_direct_io(struct kiocb *iocb, struct iov_iter *iter)
-{
-        /*
-         * FIXME
-         * Eventually need to support direct IO for non forcedirectio mounts
-         */
-        return -EINVAL;
-}
-
 static int cifs_swap_activate(struct swap_info_struct *sis,
 			      struct file *swap_file, sector_t *span)
 {
@@ -4973,7 +4954,7 @@ const struct address_space_operations cifs_addr_ops = {
 	.write_end = cifs_write_end,
 	.set_page_dirty = __set_page_dirty_nobuffers,
 	.releasepage = cifs_release_page,
-	.direct_IO = cifs_direct_io,
+	.direct_IO = noop_direct_io,
 	.invalidatepage = cifs_invalidate_page,
 	.launder_page = cifs_launder_page,
 	/*
-- 
2.31.1